The Sarah Tucker College is an institution in Palayamkottai, a town in Tirunelveli District in the southern state of Tamil Nadu in India. It is the first college for women in south India, owing its origin to Sarah Tucker of England and her friends, who raised money for the founding of a small school for training teachers for elementary schools in Tirunelveli District. After this the Sarah Tucker High School was started, which was raised to a college in 1895.
The solvothermal method was used to synthesize the Mn2Se3 nanomaterial, which was prepared using manganese acetate tetrahydrate, selenium dioxide, and triethanolamine (TEA) as complexing agents. The synthesis of a novel Mn–Se-based compound was revealed by XRD analysis. The average crystallite size was 38 nm. XPS analysis identified Mn3+ and Se2− states, confirming the Mn2Se3 phase. FTIR spectra were used to confirm that the synthesized nanomaterial included metals and functional groups. Optical characterization revealed a band gap of 1.63 eV, with low transmittance in the UV region, moderate in the visible region, and high in the IR region. HRTEM confirmed the existence of ultrathin nanosheets with a surface area of 4.826 × 105 nm2 and lateral dimensions of 100–200 nm, while the lattice fringes and SAED patterns indicated a polycrystalline nature. The FESEM images show a mixed arrangement of nanosheets and rod-like structures embedded inside the clusters. The elemental compositions of Mn and Se were confirmed by EDS analysis. The Mn2Se3 nanomaterial electrode demonstrated a boosted specific capacitance of 777, 783, 791, and 129 Fg−1 at scan rates of 5, 10, 20, and 100 mV/s, respectively, in aqueous 0.1 M KOH solution, and from the 100th to the 900th cycle, the cyclic stability remained at 100
Novel MoSe3 nanomaterial was effectively synthesized by the Solvothermal method. The prepared nanomaterials were examined by X-ray Diffraction, UV-Visible Spectroscopy, Fourier Transform Infrared Spectroscopy, Field Emission Scanning Electron Microscopy, Energy-Dispersive X-ray Spectroscopy, and X-ray Photoelectron Spectroscopy analysis. The crystallite size and the optical band gap energy of MoSe3 nanomaterial were determined to be 32 nm and 1.57 eV, respectively. The functional groups and elemental metal presence were identified by FTIR analysis. The rod-like structured morphology and flake-like layers were observed in FESEM analysis. The XPS study identified the oxidation states of Molybdenum as +6 and Selenium as −2, which confirmed the phase as MoSe3. The electrochemical performance of the MoSe3 electrode coated in nickel foam and aluminium foil was analysed by EIS, GCD, and CV studies, and the capacity retention of 105
Tirunelveli – 7 mary.christobel.stc@gmail.com An Economic Analysis of Women Entrepreneur in Parappadi Village of Nanguneri Taluk in Tirunelveli District
Lithium-based materials play a crucial role in modern energy storage systems because of their excellent electrochemical characteristics. Ongoing advancements in lithium batteries have significantly enhanced energy density, safety, and cycling stability. Among various emerging technologies, all-solid-state batteries have gained considerable attention as they eliminate the use of liquid electrolytes, thereby improving both safety and durability. Nevertheless, their performance is often limited by low ionic conductivity. NASICON-type electrolytes, such as Li1.3[X]Ti1.7(PO4)3 (where X represents divalent, trivalent, or tetravalent cations), exhibit outstanding chemical stability and high Li+ ion mobility. In this work, Li1.3[X]Ti1.7(PO4)3 compounds were synthesized using melt-quenching, grinding, uniaxial pressing, and sintering techniques. The structural and morphological properties were examined using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Electrical characteristics were investigated through impedance spectroscopy in the frequency range of 10 Hz–20 MHz and the temperature range of 303–723 K. The heat-treated samples crystallized into the LiTi2(PO4)3 phase, and variations in lattice parameters were found to depend on the ionic radius of the dopant. Doping affected the M1–M2 bottleneck, influencing Li+ transport pathways. Appropriate dopant incorporation led to enhanced porosity and improved ionic conductivity. Notably, Al-doped LTP achieved a high ionic conductivity of 0.82 × 10–4 S/cm at 550°C, marking a substantial enhancement in Li+ conduction. These results indicate that LTP-based solid electrolytes are strong contenders for next-generation energy storage applications, particularly all-solid-state lithium batteries, owing to their excellent thermal stability, high ionic conductivity, and ease of synthesis.
The novel pyramidal-shaped ternary molybdenum nickel selenide (MoNiSe4) nanomaterial was successfully synthesized using a solvothermal technique for the first time. The structural, optical and electrochemical properties of the synthesized sample were analyzed through XPS, XRD, UV-visible spectroscopy, Fourier Transform infrared (FTIR), field emission scanning electron microscope (FESEM) and EDX analyses. The XRD pattern revealed a distinct shift of the main diffraction peaks toward lower angle side compared to pure MoSe3, validating the effective incorporation of nickel and the formation of the MoNiSe4phase with an average crystallite size of 44 nm. The optical band gap of the material was estimated as 1.41 eV. FTIR spectra confirmed the presence of relevant metal-selenide bonds and its functional groups. Morphological analysis by FESEM revealed a pyramidal shape with triangular surfaces featuring sharp edges and distinct facets that reflect its high crystallinity. Elemental analysis through energy dispersive x-ray spectroscopy validated the stoichiometric composition of Mo, Ni and Se, whereas XPS analysis confirmed the oxidation states as Mo6+, Ni2+and Se2-, further supporting the formation of the MoNiSe4phase. Electrochemical analysis demonstrated superior supercapacitive characteristics of the MoNiSe4electrode. Cyclic voltammetry exhibited a pseudocapacitive nature with specific capacitances of 304 F g-1and 161 F g-1at the scan rates of 50 and 100 mV s-1respectively. Galvanostatic charge-discharge studies showed remarkable cycling stability with good capacitance retention even after 1500 cycles. The calculated specific capacitance, energy density and power density after 1500 cycles were 5695 × 10-5F g-1, 285 × 10-9Wh kg-1and 24 × 10-3W kg-1respectively. The Nyquist and Bode plots indicated ideal capacitive and pseudocapacitive behavior, confirming the efficient charge storage performance of the electrode. Overall, the MoNiSe4demonstrates strong potential as a highly effective electrode material for advanced supercapacitor applications.
