Conventional photothermal catalysis typically relies on macroscopic heat accumulation and does not directly address intrinsic bulk charge-transport limitations in transition-metal oxide semiconductors. In CuBi2O4, charge migration through thermally activated small-polaron hopping is strongly constrained by the associated activation barrier under ambient conditions. Here, a 0D/2D CuBi2O4/Ti3C2Tx MXene interfacial photothermal nanoreactor was constructed by anchoring CuBi2O4 microspheres onto monolayer Ti3C2Tx MXene. Under broad-spectrum irradiation, monolayer MXene acts as both a conductive electron-accepting platform and a localized photothermal unit, rapidly heating to 100.21 degrees C (Delta T = 78.1 degrees C) within 9.19 s and reaching a maximum temperature of 117.95 degrees C. This interfacial thermal localization facilitates small-polaron hopping in CuBi2O4, while charge redistribution establishes a built-in electric field for directional electron extraction. As a result, the CuBi2O4/ MXene nanoreactor achieves 94.77% tetracycline degradation with an apparent rate constant of 23.0 x 10(-3) min(-1), 9.6-fold higher than that of pristine CuBi2O4, and shows effective photothermal antibacterial activity against tetracycline-resistant Escherichia coli under the tested conditions. Density functional theory (DFT) calculations support interfacial electronic coupling and band bending, while femtosecond transient absorption spectroscopy (fs-TAS) reveals accelerated electron injection and an approximately 280-fold prolongation of the long-lived transient component to 12,830.67 ps, consistent with the formation of long-lived interfacial and/or trapped charge-separated states after MXene coupling. This work demonstrates that MXene-enabled localized photothermal engineering can facilitate polaron-limited carrier transport, providing a mechanistic foundation for designing full-spectrum-responsive photocatalysts for environmental remediation and water disinfection.

The rapid recombination of photogenerated electron-hole pairs serves as the primary kinetic bottleneck limiting the photocatalytic efficiency of layered double hydroxides (LDHs). The inherently sluggish charge carrier migration and insufficient surface reaction sites of LDHs result in extensive recombination of photogenerated carriers before they reach the surface to participate in reactions. Consequently, an insufficient amount of reactive species is generated to effectively address the issue of antimicrobial resistance in aquatic environments. To address this, PLDO1 was developed, a catalyst featuring atomically dispersed Pt anchored on ZnTi-layered double oxide (ZnTi-LDO), synthesized via a site-selective ion-exchange and spatial confinement pyrolysis strategy. The ZnTi-LDO material is rich in oxygen vacancies, endowing it with a strong electron capture capability. This strong metal-support interaction (SMSI) consequently diverts the direction of electron flow, shifting it from the metal toward the support. Experimental and theoretical analyses demonstrate that single-atom Pt optimizes the band structure while simultaneously enhancing the generation of singlet oxygen (1O2) as the dominant reactive species. The optimized PLDO1 catalyst achieves 91.73 ± 0.56% tetracycline (TC) degradation under visible light, with 2.33-fold higher kinetics than ZnTi-LDO. Importantly, the system achieved near-complete elimination (>99%) of both ARB and associated ARGs within 150 min, demonstrating its high efficacy in the concurrent removal of chemical pollutants and genetic determinants of resistance. This electronic-structure engineering via atomic-scale SMSI structure provides a universal design strategy for high performance layered photocatalysts in pharmaceutical pollutant remediation.

In this study, the zirconium-based metal organic framework (Zr-MOF) was applied as the adsorbent for phosphorus (P) pollution in water. Then the phosphate-adsorbed metal organic frameworks (MOFs) were used as a recycled raw material and calcined to obtain P-doped MOFs-derived carbon material (ZrP@Zr-BTC). Next, the ZrP@Zr-BTC was used for peroxymonosulfate (PMS) activation for the ceftriaxone sodium degradation. The doping of P species in the MOFs-derived carbon material led to a 31 % increase in the degradation rate compared to the material without P doping (ZrO2@Zr-BTC). The characterization results confirmed that ZrP@Zr-BTC contained zirconium phosphate, ZrP and ZrO2 in addition to inorganic carbon. P doping could affect the morphology of zirconium species and the bonding state of oxygen element in the catalyst. The degradation of ceftriaxone sodium by the ZrP@Zr-BTC/PMS system could reach 96 +/- 0.82 %. The ZrP@Zr-BTC material also had strong resistance to water quality interference and reusability. The electron spin resonance spectrometer (ESR) analysis indicated singlet oxygen (1O2) played an important role and other free radicals (SO4-center dot, center dot OH, O2-center dot) were auxiliary. The Fukui function calculated by density functional theory explained the sites susceptible to attack by reactive species, and liquid chromatography-mass spectrometry (LC-MS) results allowed for the inference of the degradation pathway of ceftriaxone sodium. This study not only provides a simple and effective method for the disposal and recycling of waste adsorbents but also offers valuable insights into the role of MOFderived carbon in activating PMS for pollutant degradation.

There is growing attention in the removal of microplastics (MPs) from aquatic environment because of their toxicity and difficulty in degradation. Magnetic Fe3O4 is a potential material for MP removal, however, for fabrication of high-efficiency Fe3O4-based adsorbents, the alkaline synthesis conditions and weak affinity toward MPs must to be addressed. In this study, we developed magnetic alpha-Fe2O3/Fe3O4 hybrid adsorbents (MFes) with engineered affinity sites via a facile one-pot synthesis method. During the material formation process, melamine acted as both a nitrogen source for creating N-modified polar adsorption sites and an inducer for formation of alpha-Fe2O3/Fe3O4 phase interfaces. The alpha-Fe2O3/Fe3O4 phase interfaces provided additional active sites, as evidenced by the enhanced microplastic adsorption performance. The MFe-1.6-100 achieved 92.3 % polystyrene removal at low adsorbent dosage 0.2 g L-1 and showed rapid adsorption kinetics within 25 min, which is superior to most reported values. After five cycles, the removal efficiency could still retain 90 %. Additionally, MFe-1.6-100 exhibited remarkable ion-tolerance for Cl-and NO3-. These performances suggest its potential applicability for MPs capture in aquatic environments.

In this paper, a high-efficient visible light responsive g-C3N4/CaTiO3/CQDs Z-type heterojunction photocatalyst was successfully prepared by a two-step method for the photodegradation of organic pollutants in water. The combination of g-C3N4, CaTiO3 and CQDs could produce synergistic effect, which facilitated the separation of carriers, thereby enhancing photocatalytic activity. The photocatalytic kinetic removal rate of g-C3N4/CaTiO3/ CQDs for methylene blue could reach about 8 times of g-C3N4 and 5.5 times higher than that of CaTiO3. The effects of co-existing ions, initial pH, water source, and humic acid on meloxicam degradation were examined. Repeatability experiments indicated that the composite had good reusability and stability with 81.1 % removal for meloxicam after four cycles. The main active substances of g-C3N4/CaTiO3/CQDs in free radical capture experiment was center dot O-2(-center dot). Possible degradation pathways of meloxicam were also analyzed. The results highlight the g-C3N4/CaTiO3/CQDs Z-type heterojunction is a desirable photocatalyst for removing organic pollutants in water.

Pharmaceuticals and personal care products and dyes have low biodegradability and high toxicity, seriously threaten the human health and ecological environment. Therefore, seeking effective removal methods has become the focus of research. In this study, silver-based metal-organic framework (Ag-MOF) and chitosan (CS) hybrid adsorbent (Ag-MOF-CS) was synthesized via solvothermal one-pot synthesis to remove diclofenac sodium (DCF) and acid Red 1 (AR1) from water for the first time. The morphology and structure of Ag-MOF-CS were confirmed by various characterizations. The effect on adsorption was investigated by changing the adsorbent dosage, pH and other conditions. The adsorption kinetics, adsorption isotherms and thermodynamics were analyzed. Ag-MOF-CS showed a high adsorption capacity. And the maximum adsorption capacity of Ag-MOF-CS for DCF and AR1 was 351.75 mg/g and 678.83 mg/g, respectively. The adsorbent bound to DCF and AR1 may via electrostatic forces, pi-pi interactions, hydrogen bonding. Even after four cycles of Ag-MOF-CS, the DCF removal can still be higher than 80 %. The eco-friendly Ag-MOF-CS demonstrated significant potential for utilization in treating wastewater.

Developing an economical and efficient catalyst derived from biochar and metal-organic frameworks (MOFs) for the activation of peroxymonosulfate (PMS) to degrade pollutants holds promise for practical applications. Herein, a simple in-situ synthesis method was designed to generate zeolitic imidazole framework with Co-based (ZIF-67) on the surface of waste walnut shell biomass, and novel derived magnetic catalysts (BC@CobC, Biochar@Co base Carbon) were obtained by high-temperature carbonization. This structure could avoid the drawbacks of structural collapse and particle agglomeration of MOF derivatives, while the presence of biochar could accelerate electron transfer and improve the activation performance. For the degradation of levofloxacin, the removal rate in the 0.5-BC@CobC/PMS system reached 89.88 % in 15 min with a mineralization of 60.43 % when the dosage of catalyst was 0.01 g L-1 . Capture experiments and EPR tests showed that SO (-)(4) center dot, center dot OH, center dot O (-)(2) and 1 O 2 were jointly participated in the levofloxacin degradation process. Meanwhile, the BC@CobC/PMS system was minimally affected by the pH, co-existing inorganic anions, and natural active substances. It is worth noting that the BC@CobC/PMS system also had excellent removal effect on other typical organic pollutants, and the removal rate could reach 100 %. Cycling experiments showed that BC@CobC maintained high catalytic activity after multiple recycling. The degradation pathway of levofloxacin was also analyzed. Compared to the existing reports, the catalyst is economically superior, with much improved pollutant removal, and boasts a lower catalyst usage. This work will provide a viable idea in terms of reusing biomass waste and activating PMS for wastewater treatment.

Calcium titanate (CaTiO3) has received more and more attention due to the excellent physicochemical properties. However, in the process of photocatalysis, the photogenerated carriers are very easy to recombine. Based on this problem, g-C3N4 modified CaTiO3 photocatalyst was prepared via calcination. The properties of CaTiO3/g-C3N4 were analyzed through XRD, SEM, XPS, UV-vis and TGA. The optimized CaTiO3/g-C3N4 could achieve 100% and 87.7% removal rate of methylene blue (MB) and levofloxacin (LVF), respectively, under a 500 W mercury lamp illumination within 120 min. In addition, the effects of photocatalyst dosage, solution pH and co-existing ions in water on the degradation process were systematically investigated. A possible charge transmission mechanism was analyzed and the LVF degradation pathway was proposed. This work will provide a new strategy to syn-thesize cost-effective CaTiO3 composites.

Graphite-like carbon nitride (g-C3N4) is favored for its excellent physicochemical properties. However, the high complexation rate of photogenerated carriers greatly limits its practical applications. Based on this, a novel CQDs-doped carbon nitride nanosheets composite (CNS/CQDs) was prepared and applied to the visible light-induced activation of peroxymonosulfate (PMS) for meloxicam (Mel) and tetracycline (TC) degradation. The photocatalytic degradation of Mel and TC were remarkably promoted in the CNS/CQDs+PMS+vis system. Mel photodegradation of 99.90% was achieved over 30 min with 20 mg CNS/CQDs and 20 mg PMS at pH11. And TC photodegradation of 95.97% was achieved over 45 min with 20 mg CNS/CQDs and 20 mg PMS at nature pH6.5. The TOC mineralization rates of Mel and TC were 75.49% and 52.00%, respectively. The transient photocurrent response and electrochemical impedance measurements (EIS) results indicated that the doping of CQDs could improve the charge transfer efficiency of pure g-C3N4, and CNS/CQDs had a low charge transfer resistance. Capture experiments and EPR tests explored the effective actives in the CNS/CQDs+PMS+vis system. Possible degradation pathways of Mel were also analyzed. This study provides valid residual drugs degradation under the dual conditions of visible light catalytic oxidation and persulfate oxidation, which will be a novel perspective for advanced oxidation technology to effectively remove organic pollutants from water.

2D cobalt-based hexagonal nanosheets (HNs) with an adjustable structure formed by a melamine thermal reflow method were proposed and were then calcined in an inert gas atmosphere to obtain single-atom ruthenium modified cobalt oxide.

CaTiO3 is considered to be one of the most promising catalysts for the degradation of organic pollutants, but its application is limited by the wide band gap and low catalytic activity. Element doping is an effective strategy to solve these problems. Herein, a novel CaTiO3 co-doped with Ag and Co (Ca1-xAgxTi1-yCoyO3) was synthesized by combining co-precipitation and the microwave hydrothermal method for the first time. The crystal structure, microstructure and light absorption of the material were systematically investigated. The results showed that Ca1-xAgxTi1-yCoyO3 had higher light absorption than pure CaTiO3, and the band gap was reduced to 2.78 eV. First-principles calculations indicated that Ag-Ca and Co-Ti tended to form donor-acceptor defect pairs in the doping process. These defect states not only enhanced the adsorption properties, but also could be used as carrier traps to optimize the dielectric properties of CaTiO3. In the photoelectrocatalytic system, with 0.01 g of catalyst, 98% of methylene blue in 100 mL solution (10 mg L-1) was degraded in 150 min. In addition, Ca1-xAgxTi1-yCoyO3 showed strong stability and excellent recyclability. The double ion co-doping technology will provide an effective strategy for improving the catalytic activity of traditional wide-band gap semiconductors.

The energy storage and upconversion effect of carbon quantum dots (CQDs) could improve the photocatalytic efficiency of materials. In this study, a visible-light-driven photocatalyst, CQDs-doped carbon nitride nanosheets composite (CNS/CQDs) was in-situ synthesized by the thermal stripping of carbon nitride bulk (CNB). The as prepared CNS/CQDs photocatalyst was systematically characterized and applied to the removal of Meloxicam (Mel) in water. The results showed that the introduction of CQDs could improve the visible light utilization of the carbon nitride. Mel (50 mL, 10 mg L-1) was degraded by 99.60% in 45 min with CNS/CQDs (20 mg). The stability and recycling experiments showed that CNS/CQDs could maintain high photocatalytic activity under complex matrix and multiple cycles. This work will provide a new attempt to synthesize the CQDs doped photocatalytic materials for the effective removal of organic pollutants in water under visible light.

Two dimensional materials show unique advantages in catalysis. In this work, it was found that melamine could induce the directional growth of cobalt-based catalysts to form an ultra-thin two-dimensional hexagonal...

随着我国印染工业的快速发展，大量印染废水随之产生。印染废水具有色度高、难降解有机物浓度高、水质波动大等特点，对环境和人类健康造成危害。采用碱液沉积交联法制备多壁碳纳米管/壳聚糖复合材料（MWCNTs/CS），对二甲酚橙和茜素红染料模拟废水进行吸附处理，考察不同制备条件对吸附性能的影响。结果表明：多壁碳纳米管与壳聚糖质量比为1∶4、交联剂戊二醛投加量为2.5 mL、交联温度为50 ℃、交联时间为5 h时，制得的复合材料吸附效果最好。MWCNTs/CS对茜素红的最大吸附量可达291.44 mg/g，对二甲酚橙的最大吸附量可达263.59 mg/g。2种染料的吸附过程符合拟二级动力学模型，以化学吸附为主，为自发放热过程。Freundlich吸附等温线能较好地拟合该吸附过程，n大于1，表明吸附过程为优惠吸附。

在新工科教育背景下,为了全面提升学生的知识、能力、政治和专业素养,培养制药环保应用型、 创新型人才,环境化学课程深度挖掘思政元素,发挥专业课育人主渠道作用,实现线上线下、课内课外全面育人.设计多元化课程思政教学模式,强化教学内容、教学方法和教学资源建设,取得了一定效果.

The synthesis of Vis-light driven catalysts with high photocatalytic performance and efficient activation of persulfate requires new strategies. Herein, a multistage structural tuning graphitic carbon nitride co-modified by Co, S (pg-C3N4/Co3O4/CoS) was synthesized for the first time through in-situ template method and microwave sulfurization treatment. A photocatalysis-PMS oxidation coupling system was also proposed. The results showed that the introduction of cobalt could improve the photocatalysis and PMS activation efficiency of the graphitic carbon nitride. Further sulfurization treatment could generate more active sites for PMS activation and increase the interlayer distance of carbon nitride to broaden the absorption range of Vis-light. Density functional theory (DFT) calculations indicated the migration of electrons from carbon nitride to CoS promoted the recycling of Co3+/Co2+. In the coupling system, BPF 50 mL (30 mg L-1) was degraded by 99% in 10 min with 0.1 g L-1 catalyst and 0.32 mmol L-1 PMS. The degradation rate was 4 times faster than that of pure PMS system under visible light. Notably, BPF was effectively mineralized and TOC removal rate reached 90%. The stability and recycling experiments showed that pg-C3N4/Co3O4/CoS maintained high catalytic performance under complex matrix and multiple cycles, and could be quickly separated and recovered due to the magnetic Co3O4. This work will provide a new strategy for the development of multi performance catalytic materials, and the proposed photocatalysis-PMS coupling system has huge potential for the wastewater treatment.

Developing high-efficient supporter is important for enhancing pollutants removal efficiency of a catalyst. Materials Institute Lavoisier-101(Cr) (MIL-101(Cr)) is one of metal-organic frameworks (MOFs). In this study, a novel visible-light-driven absorptive photocatalyst, TiO2-loaded magnetic MOFs composite (TiO2/mag-MIL-101(Cr)), was synthesized to improve the reusability, the adsorption and photocatalytic efficiency under visible-light. The as-synthesized TiO2/mag-MIL-101(Cr) was systematically characterized and used for adsorbing and photodegrading refractory organics, bisphenol-F (BPF) and acid red 1 (AR1), from water. Mag-MIL-101(Cr) remarkably enhances the light-absorption of TiO2, and the band-gap value of TiO2 /mag-MIL-101(Cr) is 1.61 eV. TiO2/mag-MIL-101(Cr) exhibited outstanding removal efficiency to bisphenol-F and AR1, which was attribute to the large adsorption capacity of mag-MIL-101(Cr) and the enhanced separation properties of photogenerated electrons and holes. In the photocatalytic process, h(+) is proved to be a predominant active species, while center dot OH and center dot O-2(-) play an auxiliary role. The proposed strategy is an attempt to design new semiconductor-MOF photocatalytic materials for degrading organic contaminants in water under visible light.

In this work, ofloxacin degradation was investigated by using Fe3O4-CeO2/activated carbon (AC) as heterogeneous Fenton catalyst. Response surface methodology based on central composite design (CCD) was used to investigate individual and interactive effects of three parameters on the ofloxacin degradation, i.e., solution pH, H2O2 dosage and initial ofloxacin concentration. Optimal conditions were determined to be pH 3.3, H2O2 20.0 mM, ofloxacin 12.0 mg L-1 and catalyst 0.5 g.L-1. The ofloxacin degradation efficiency and the total organic carbon (TOC) removal was 95% and 54% within 60 min, respectively. The obtained results agreed well with the modeling prediction (R-2 = 0.9826, and Adj-R-2 = 0.9783). The kinetic analysis implied that the reaction followed first-order kinetic with R-2 = 0.9965. According to mass spectrometry qualitative analysis, eight intermediates of ofloxacin were detected and two possible degradation pathways were proposed. The catalyst still showed degradation efficiency of 82.4% toward ofloxacin after five runs.