This study reports the fabrication and analytical performance of a multi-walled carbon nanotube paste electrode modified with ferrocenium tetrachlorobismuthate (FTB@MWCNTs/CPE) for the voltammetric detection of lead ions (Pb2+) in aquatic environments. The modified composite was characterized using Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD) to confirm its morphological and structural features. The electrochemical behavior of the redox-active FTB modifier was investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronocoulometry, revealing improved electron transfer properties as evidenced by the decrease in charge transfer resistance and the increase in electroactive surface area at an optimal FTB loading of 10% (w/w). Square wave stripping voltammetry (SWSV) coupled with a flow injection analysis (FIA) system was employed to achieve automated, rapid, and reproducible Pb2+ detection. The proposed sensor exhibited a low detection limit of 0.08 nM and two distinct semi-logarithmic linear dynamic ranges, namely a low-concentration range (1.0-100 nM) and a high-concentration range (1.0-100 μM), each confirmed by its respective calibration plot. The sensor demonstrated satisfactory reproducibility and stability. Interference studies confirmed high selectivity toward Pb2+ in the presence of ten potentially interfering metal ions (Co2+, La3+, Ni2+, Li+, Zn2+, Cu2+, Er3+, Ca2+, Mn2+, and Sn2+), each evaluated at up to 50-fold excess concentrations. Application to real water samples resulted in recovery values ranging from 93% to 107%, demonstrating the accuracy and practical applicability of the proposed method for environmental monitoring.

This study reports the fabrication of a ferrocenium dibromostannate(II) (FBS)-modified multi-walled carbon nanotubes (MWCNTs) paste electrode for the electrochemical detection of cadmium ions (Cd(II)). The composite material was characterized using field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and transmission electron microscopy (TEM). Electrochemical analyses including cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronocoulometry demonstrated enhanced performance at an optimal FBS loading of 10 % (w/w). Using square wave voltammetry (SWV), the developed sensor achieved a detection limit of 0.41 nM across a linear concentration range of 10 nM to 1 mu M, along with excellent stability (relative standard deviation, RSD = 4.17 %) and repeatability (RSD = 3.87 %). Real sample analyses yielded recoveries of 98-109 %, confirming the reliability and sensitivity of the sensor for Cd(II) detection in environmental monitoring applications.

This study presents the fabrication of a ferrocenium tetrachloromagnesate (FTM) modified multi-walled carbon nanotubes (MWCNTs) electrode for the voltammetric determination of bismuth ions (Bi3+) in aquatic environments. The FTM was synthesized from the reaction of mag­nesium chloride with ferrocene. The incorporation of FTM, a redox-active species, was shown to markedly improve electron transfer kinetics and overall electrochemical conductivity. Structural and morphological characterizations via Fourier transform infrared spectroscopy, transmission electron microscopy, energy dispersive x-ray, field emission scanning electron microscopy and X-ray diffraction confirmed the successful embedding of FTM within the electrode matrix. Electrochemical assessments using cyclic voltammetry, electrochemical impe­dance spectro­scopy, and chronocoulometry revealed that a 10 wt.% FTM loading provided the most optimal charge transfer and interfacial behaviour. Differential pulse stripping voltammetry further demonstrated the high sensitivity of the developed electrode, achieving an ultralow detection limit of 0.543 nM with two broad linear ranges of 1.0 nM to 0.1 and 1.0 µM to 0.1 mM for Bi3+. The sensor also exhibited remarkable reproducibility (RSD 8.67 %) and stability (RSD 7.77 %). Furthermore, excellent selectivity toward Bi3+ was maintained in the presence of potentially interfering ions such as Mn2+, La3+, Ni2+, Li+, Zn2+, Fe2+, Cd2+, Cu2+, Er2+ and Pb2+. Real water-sample analyses yielded recoveries of 89 to 104 %, confirming the practical feasibility of the electrode for environmental monitoring.

The study introduces a novel electrochemical sensor for paracetamol (PCM) determination based on a nanocomposite composed of zinc layered hydroxide (ZLH) intercalated with sodium dodecyl sulphate and thiacloprid (SDS-THI), integrated with multiwalled carbon nano­tubes (MWCNTs). The sensor aims to address limitations of conventional analytical techniques and improve sensitivity, detection limits, and portability. Electrochemical techniques, including electrochemical impedance spectroscopy, square wave voltammetry and cyclic voltammetry, were employed to characterize the sensor performance. The ZLH-SDS-THI/MWCNTs sensor showed superior electrocatalytic activity, with a wide linear range (0.7 to 30 mM) and a low detection limit (LOD = 0.33 mM), outperforming several previously reported sensors. The enhanced performance is attributed to the synergistic properties of the composite materials, which offer improved electron transfer, a high surface area, and effective analyte interaction. Importantly, the sensor demonstrated excellent selectivity, as interference studies revealed that common biological and ionic species such as ascorbic acid, glucose, fructose, lysine, chloride, magnesium, and sulphate ions, even when present at 10-, 20-, and 50-fold excess concentrations relative to PCM, caused less than 10 % signal variation. This confirms the sensor’s robustness and reliability in complex sample matrices. Overall, this work highlights the potential of incorporating unconventional organic dopants, such as thiacloprid, into layered nanostructures to enhance the performance of electrochemical sensors, offering a promising platform for the selective and sensitive determination of pharmaceutical compounds in environmental and clinical applications.

This study presents the synthesis of a graphitic carbon nitride-zinc indium sulfide nanocomposite (g-C3N4/ ZnIn2S4) and its electrochemical activity towards the detection of paraquat (PQ) in aqueous media. The nano-composite was synthesised via the hydrothermal method. Verification via FTIR, XRD, EDX, FESEM, and TEM investigations confirmed the deposition of ZnIn2S4 onto the g-C3N4 nanosheet. The g-C3N4/ZnIn2S4 was immobilised onto a glassy carbon electrode (GCE) and referred to as g-C3N4/ZnIn2S4/GCE. The assessment of g-C3N4/ ZnIn2S4/GCE by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) indicated enhanced electrochemical activity. The g-C3N4/ZnIn2S4/GCE exhibited elevated CV peaks and reduced charge transfer resistance relative to the bare GCE, indicating enhanced electron transfer efficiency. Under optimum conditions, the g-C3N4/ZnIn2S4/GCE exhibited a linear detection range from 70 nM to 1.0 mu M (R2 = 0.99441) with a detection limit of 62 nM. The results exhibited remarkable selectivity, with interference remaining below 15 % of diverse organic and inorganic substances. The g-C3N4/ZnIn2S4/GCE exhibited recovery efficiency ranging from 96.0 % to 110.0 % for spiked water samples. The results demonstrate the significant potential of g-C3N4/ZnIn2S4 as a workable material for the detection of PQ in environmental analysis.

This study reports the fabrication and characterization of a screen-printed carbon electrode (SPCE) modified with pyridinium-antimony trichloride (PAT) for copper ion (Cu2+) detection in aqueous environments. The SPCE was prepared by printing carbon ink onto a polyethylene terephthalate-mica substrate, while the PAT material was characterized using transmission electron microscope, field emission scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction. Electrochemical performance was evaluated using cyclic voltammetry, electrochemical impedance spectroscopy, and chronocoulometry, exhibited two distinct linear ranges (0.1-10 mu M, R-2 = 0.998; 0.1-10 mM, and R-2 = 0.938). The sensor demonstrated exceptional selectivity against ten interfering metal ions, exhibiting high reproducibility (relative standard deviation, RSD, 2.08%) and repeatability (RSD 3.22%). These metrics confirm the sensor's reliability and consistency in Cu2+ detection.

This study presents the development and characterization of a multi-walled carbon nanotubes (MWCNTs)-based paste electrode modified with ferrocenium tetrachloroferrate (FTCF) for detecting of manganese(II) ions, Mn(II) in environmental applications. The modified material was characterized using Fourier transform infrared spectroscopy, X-ray diffraction, and field emission scanning electron microscopy. Electrochemical performance was evaluated through cyclic voltammetry, electrochemical impedance spectroscopy, and chronocoulometry. Square wave voltammetry was employed for quantitative detection of Mn(II). The MWCNTs/FTCF electrode demonstrated a linear detection range from 1.0 nM to 0.1 mu M and 1.0 mu M to 0.1 mM, with correlation coefficients (R2) of 0.9865 and 0.9762, respectively, and a detection limit of 0.275 nM. Interference study towards 11 competing ions, each at 10 folds concentration of Mn(II) shown an interference levels below 15 %, indicating a good selectivity. Additionally, the electrode exhibited excellent stability and reproducibility. The proposed electrode has been applied to determine Mn(II) in real water samples and the results shown that recovery values from 93 % to 113 %. Hence, it was suggested as alternative tool for the analysis of Mn(II) in environmental study.

In this research, a fungicide, namely quintozene (QZ) fungicide, was successfully intercalated into zinc hydroxide nitrates (ZHN) with sodium dodecyl sulphate (SDS) surfactant by using a co-precipitate and direct reaction method to form new nanomaterials, ZHN-SDS-QZ. PXRD analysis indicated the successful intercalation with the basal spacing of 33.6 Å. The presence of QZ fungicides in the interlayer space of zinc layered hydroxide is also supported by FTIR and elemental analysis. The thermal analysis confirmed that ZHN-SDS-QZ nanomaterials had good thermal stability compared to the pure QZ. The intercalation of QZ leads to important changes in the morphology, porosity and surface area. Nitrogen adsorption-desorption isotherms reveal that the adsorption isotherm types according to BET analysis for ZHN–SDS are Type IV, while for ZHN-SDS-QZ are Type III. The release into aqueous solution of Na3PO4 and Na2CO3 was governed by pseudo-second order, while for the aqueous solution of NaCl was the Fickian diffusion model. Overall, this nanomaterial is a promising material to develop pest control solutions in the agriculture sector that are effective, yet promote minimal risk to human health and the environment, ensuring food security, safety and ecological sustainability. This study demonstrates that ZHN-SDS-QZ exhibits enhanced stability and controlled release behaviour, making it a promising nanocarrier for sustainable agrochemical delivery.

This study aims to enhance the targeted delivery of a powerful antioxidant, ferulate (FA), by developing a controlled release formulation (CRF) based on the incorporation of layered double hydroxide and Tween-80 polymeric surfactant. The layered double hydroxide-ferulate (LDH-FA) synthesized by co-precipitation method was homogenously mixed with the Tween-80 coater under continuous stirring. The successful Tween-80 coating was verified with PXRD analysis and supported by FTIR. No changes in interlayer distance between LDH-FA (at 17.4 and 8.7 Å) and LDH-FA-T80 (at 17.6 and 8.6 Å) were observed in the PXRD pattern. TGA/DTG analysis demonstrated good thermal stability of LDH-FA-T80, with the ability to withstand extreme temperatures up to 460 °C. The association of Tween-80 with LDH-FA progressively sustained the release time of FA in each aqueous solution, with a release time of up to 440 min. For both LDH-FA and LDH-FA-T80, the release of FA is through dissolution and anion exchange release mechanism (regulated by pseudo-second-order kinetic model). The study's findings suggest practical applications of FA in the pharmaceutical industry by implying the retarding effect triggered by Tween-80, offering new insights for the application of CRF to enhance the therapeutic effect of FA.

Square wave voltammetry, cyclic voltammetry, chronocoulometry, and electrochemical impedance spectroscopy were employed to assess ascorbic acid's electrochemical behavior in multiwalled carbon nanotubes (MWCNTs)/carbon paste electrode (CPE) modified by 1-phenyl-3-methyl-4-metafluorobenzoyl-5-pyrazolone (HPMmFBP). The ascorbic acid's irreversible oxidation peak appeared at approximately 0.5 V. The shifting of the peak potential at the pH range of 6.0-8.4 showed the involvement of protons in the ascorbic acid oxidation. Moreover, the shifting of the peak potential with scan rate in the range of 0.07-0.4 V/s confirmed that the oxidation reaction was irreversible. Under optimized conditions, the oxidative peak current showed linear dependence on the ascorbic acid's concentration between 1 and 1000 mu M with limit of detection (LOD) and quantification (LOQ) at 0.1 and 0.34 mu M, respectively. HPMmFBP/MWCNT/CPE exhibit good antiinterference ability, reproducibility, repeatability, and stability and was utilized for the accurate and rapid ascorbic acid detection in commercial tablets. Therefore, it has good potential for practical application.

This study' purposes are to synthesize molecularly imprinted polymer (MIP) with hydroxyethyl methacrylate (HEMA) and triethylene glycol dimethacrylate (TEGDMA) using p-xylene under ultraviolet curing at 405 nm for the recognition of hydroquinone (HQ) in aqueous medium. The template was extracted from the polymer with a mixture of methanol and acetic acid (9:1) by volume (v/v). The Fourier transform infrared (FTIR) spectrum of MIP (after wash) showed the absence of peak at the range of 840–860 cm−1, which represented the stretching outside the aromatic plane C–H at the para position (p-xylene). Field emission scanning electron microscope (FESEM) micrograph showed that the MIP had cavities compared to non-imprinted polymer (NIP). The MIP (MIP-Pxy) with ratio (monomer:crosslinker) 0.25 and 1.00% template gave the highest uptake of hydroquinone (HQ) in aqueous solution, which implied more specific recognition (highest KD value). The rebinding of HQ onto MIP-Pxy was best described by both isotherm (Langmuir and Freundlich) and kinetic model (pseudo-first and -second). The MIP was successfully synthesized using p-xylene, able to recognize HQ and was very selective to p-CP. Implication of the study, the synthesized MIP can be used for recognition and sensing materials for HQ and any similar molecules.

Over a decade, the Malaysia National Poison Centre found that 40% of pesticide poisoning cases may be linked to excessive paraquat (PQ) in water, soil, or food, underscoring the widespread impact on public health and emphasising the importance of detecting even trace amounts of PQ residues in the environment. Thus, this study presents a novel electrochemical sensor based on multiwalled carbon nanotubes (MWCNTs) reinforced cadmium sulphide co-anchoring on graphitic carbon nitride (CdS/g-C3N4) nanocomposites for PQ detection. The CdS/g-C3N4 nanocomposite was successfully synthesised and characterised through FTIR, XRD, EDX, FESEM and TEM analysis. The modified electrode (CdS/g-C3N4/MWCNTs PE) exhibited improved electrocatalytic activity, as demonstrated by cyclic voltammetry (CV) and impedance spectroscopy. The CdS/g-C3N4/MWCNTs PE displayed a high CV peak and low R-ct value which corresponded to a higher electron transfer rate, reduced charge transfer resistance and enhanced mass transport properties. The electrochemical sensor's performance was evaluated for the detection of PQ, and it demonstrated a linear response in a range of 1.0 mu M to 0.1 mM with a limit of detection of 0.14 mu M. Furthermore, the sensor exhibited selectivity with a less than 16% potential interference from various organic chemicals and inorganic ions. The sensor's applicability was tested by quantifying PQ in real water samples, showing excellent recovery percentages ranging from 98.9% to 102.0%. The developed electrochemical sensor provides a practical solution for the rapid and accurate monitoring of PQ levels in the environment. This work establishes the foundation for the development of a selective electrochemical sensor for pesticide analysis, addressing both public health and environmental concerns.

In this study, durian shell-based activated carbon (DAC) was produced via chemical activation method by utilising durian shell and sulphuric acid (H2SO4) as the starting material and activating agent, respectively. The incorporation of H2SO4 in the DAC production process resulted an improvement in the surface properties and adsorption capacity of the produced DAC adsorbent. Field emission scanning electron microscopy analysis further showed that the produced DAC possessed a porous structure which was beneficial for dye adsorption application. Under operating conditions of 500°C and 3 hours carbonisation temperature and time, the Brunauer–Emmett–Teller (BET) surface area, total pore volume and BET average pore diameter were measured to be 242.03 m2/g, 0.028 cm3/g and 2.28 nm, respectively. The adsorption performance of the produced DAC was then investigated using methylene blue (MB) as the model adsorbate. The optimum MB dye removal and adsorption capacity were found to be 92.05% and 0.767 mg/g, respectively, with 0.6 g of DAC dosage, 10 ppm of initial MB dye concentration and 15 min of contact time.

In this present work, a sensitive electrocatalytic modified electrode based on 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP)/multiwalled carbon nanotubes (MWCNT) modified carbon paste electrode (CPE) was successfully developed. Electrochemical impedance spectroscopy, square wave voltammetry, chronocoulometry and cyclic voltammetry were used in prompt to evaluate the PMBP/MWCNT/CPE electrochemical capacity in detecting acetaminophen (APAP) in 0.1 M PBS pH 6.4. Under optimized conditions, PMBP/MWCNT/CPE displayed a well-defined electrocatalytic activity towards APAP oxidation in the linear responses which range from 1 μM to 1 mM (R2 = 0.991) with the LOD obtained at 0.245 μM while LOQ 0.816 μM. The presence of excess (10-fold and 25-fold) interferents such as sucrose, fructose, glucose, sodium chloride, sodium sulphate, potassium nitrate, lysine, potassium chloride and magnesium chloride as interferents was insignificant. The results presented in this study provide new perspectives on PMBP as a potential nanomaterial in the development of APAP sensors. As a conclusion, the PMBP/MWCNT/CPE revealed good stability, reproducibility, and repeatability, and was discovered to be relevant for usage in the pharmaceutical samples with satisfactory performance.

The fabrication of a zinc hydroxide nitrate-sodium dodecylsulfate bispyribac modified with multi-walled carbon nanotube (ZHN-SDS-BP/MWCNT) paste electrode for uric acid and bisphenol A detection was presented in this study. Electrochemical impedance spectroscopy, chronocoulometry, square-wave voltammetry, and cyclic voltammetry were all used to examine the electrocatalytic activities of modified paste electrodes. The modified electrode’s sensitivity and selectivity have been considered in terms of the composition of the modifier in percentages, the types of supporting electrolytes used, the pH of the electrolyte, and square-wave voltammetry parameters like frequency, pulse size, and step increment. Square-wave voltammetry is performed by applying a small amplitude square-wave voltage to a scanning potential from −0.3 V to +1.0 V, demonstrating a quick response time and high sensitivity. The ZHN-SDS-BP/MWCNT sensor demonstrated a linear range for uric acid and bisphenol A from 5.0 µM to 0.7 mM, with a limit of detection of 0.4 µM and 0.8 µM, respectively, with good reproducibility, repeatability, and stability as well. The modified paste electrode was successfully used in the determination of uric acid and bisphenol A in samples of human urine and lake water.

Microgreens have been chosen as a sustainable dietary staple food due to their high nutritional value and short harvesting time. However, researches about the actual comparison of the nutritional value between microgreens and their respective adult vegetables is still missing. Furthermore, in a hydroponic system, chitosan nanoparticles (CNPs) can be used as an alternative sustainable nutrient formulation to the conventional/basic nutrient formulation solution. As a result, in this study, the quality, yield and nutritional content of hydroponically cultured microgreens versus adult of Bok Choy (Brassica rapa subsp. Chinensis (L.) Hanelt) vegetables were examined and evaluated in response to CNPs treatments and/or fertilizer supplementation that were grown under the same conditions and environments. CNPs have shown incredible potential as a sustainable alternative nutrient supplement in the growth of Bok Choy microgreens and adults. The nutritional value results backed up these claims as well. The addition of CNPs to conventional fertilizer has significantly increased the nutritional value of Bok Choy (microgreens and adults), supporting the claims of CNPs' ability to improve nutrient absorption and uptake. This is towards high-throughput green farming with better quality and yield using the nanotechnology platform.

ABSTRACT. This work explicates a simple, rapid, and sensitive method for the electrochemical detection of dopamine (DOP) utilising 1-phenyl-3-methyl-4-orthofluorobenzoyl-5-pyrazolone (HPMoFBP)/multiwalled carbon nanotube (MWCNT) carbon paste electrode (CPE). The electrochemical behaviour of DOP was performed through cyclic voltammetry and square wave voltammetry. HPMoFBP/MWCNT showed a higher current at the lower potential for the oxidation of DOP compared to bare MWCNT. The sensor's improved electrocatalytic activity was observed to detect in a 1.0 x 10-1 M phosphate buffer saline (PBS) solution at pH 8.0. A good linear regression analysis was observed between electrical response and the concentration of DOP in the range of 1 to 1000 µM. Under optimized experimental conditions, 1.0 x 10-7 M has been determined as the limit of detection (LOD). The sensor has expressed considerable sensitivity towards DOP detection without interference and is successfully used to determine DOP in dopamine hydrochloride injection. KEY WORDS: Electrochemical sensor, Dopamine, Pyrazolone, MWCNT, Voltammetry Bull. Chem. Soc. Ethiop. 2023, 37(4), 845-857. DOI: https://dx.doi.org/10.4314/bcse.v37i4.4

Zinc Layered hydroxide (ZLH) is a layered material easily synthesized with a structure identical to brucite-like material. Due to the exchangeable anions in the interlayer compensating for the positive charge of a brucite-type layer, ZLH provides a wide application in many fields. This review focuses on the properties and method of synthesis of ZLH by giving an overview of intercalated guest anion in the interlayer of ZLH. The further discussion involved the application of intercalated guest anion in zinc layered hydroxide layer and its properties as a sensitizer, controlled release biomedical, and agriculture to provide the scientific community for research and development by giving current findings. This brief review also presents the success of anion intercalation for controlled release along with the kinetic model involved, which increases the bioavailability and effectiveness of the nanocomposite on its target. It shows the development of research on ZLH nanocomposites toward the sustainability of human life and the environment. This study implies that it is a source of knowledge for researchers about zinc-layered hydroxide materials involving synthesis methods and their application to produce more beneficial nanomaterials.

Increasing developments on the application of copper complexes as dyes are due to their dual function in dye-sensitized solar cells (DSSCs) as redox mediators and dye sensitizers. The economical (abundance, low cost) and environmentally friendly properties of copper motivate researchers on the use of copper complexes for replacement of ruthenium-based dyes in solar cells. A novel [Cu(I)(2,9-dmp)(phen-dione)]PF6 (A2) bearing polypyridyl ligands, 1,10- phenanthroline-5,6-dione (phen-dione), 2,9-dimethyl-1,10-phenanthroline (dmp) was prepared by metal complexation reaction. The photofunctionality of A2 as a promising photosensitizer in DSSCs was studied. Interestingly, A2 exhibited two absorption peaks, one is detected in the ultraviolet region due to pi-pi* transition and the other is a metal-to-ligand charge transfer (MLCT) band at 405nm in the visible region. A2 was compared to the same complex with Cu(II) ion as the metal centre which only absorbed light in the ultraviolet region thereby implying limited use of Cu(II) complex in its light harvesting application. The photofunctionality of A2 was studied by employing it as an active material for photoelectric conversion by engaging it with ITO to create a photoanode. Upon light irradiation, an anodic current was observed. In conclusion, introduction of Cu(I), instead of Cu(II), in polypridyls ligands resulted in successful enhancement of photophysical properties of A2, making the photoanode of A2 suitable for light harvesting applications.

The loss of nutrients from conventional fertilisers is often encountered by the agricultural industry. Slow-release fertilisers by nanotechnology application can maintain nutrient availability for effective plantgrowth. Zinc-layered hydroxide nanohybrids have been little explored as controlled release systems offunctional anions, unlike the Layered Double Hydroxides (LDH) that belong to the same family ofanionic clays. The objective of the study was to investigate the effectiveness of zinc-layered hydroxidenanohybrid containing plant nutrient anions as a controlled-release formulation. Two nano-deliverymaterials namely zinc-layered hydroxide nitrate (ZLN) and zinc-layered hydroxide phosphate (ZLP) weresuccessfully synthesised through the co-precipitation and anion exchange methods. The PXRD patterns ofthe resulting nanohybrids, ZLN and ZLP recorded basal spacing of 9.57 and 6.78Å, respectively, at alower 2 angles range of 0-60 o . FTIR analyses confirmed the formation of host-guest nanohybrid whichcomprised the characteristic bands of nitrate and phosphate. Thermogravimetric analyses showed thethermal stability of the nanohybrid obtained where the capability of the host material to function as acontrolled release agent was determined through a controlled release study. Controlled release of plantnutrient sources, nitrate and phosphate from their respective nanohybrids were evaluated using variousrelease medium solutions. The accumulated release of guest anion from interlayer zinc layered hydroxide(ZLH) nanohybrid into pH 4 solution was observed to be faster than pH 6.5. A higher concentration ofsodium carbonate solution showed an increase in the percentage release for both nitrate and phosphateanions into the release medium. A plant growth trial using Kelempayan (Neolamarckia cadamba)seedlings showed that treatment with ZLN and ZLP recorded the highest biomass weight compared toapplication with commercial fertiliser and raw chemicals. The content of N, P and Zn in Kelempayanleaves showed the highest readings for similar treatment. The study found that ZLH has acted as a goodhost for inorganic plant nutrients with slow-release properties and thus has improved the growthperformance of Kelempayan seedlings with better nutrient uptake.