Enhanced Physico-Chemical and Electrical Characteristics of Hydrothermally Synthesized NiTiO via Tungsten Doping for Gas Sensing Applications.

Herein, tungsten-doped nickel titanate (WNiTiO3) nanoparticles are synthesized using hydrothermal route and investigated physicochemical and gas sensing properties. The effect of W-dopant concentrations on the physicochemical and electrical characteristics of NiTiO3 is systematically investigated. X-ray diffraction analysis revealed a consistent decrease in crystallite size, accompanied by an increase in dislocation density and micro-strain with higher W doping levels.

Green Synthesis of Lanthanum Oxide Nanoparticles Using Coleus Barbatus: Annealing Effect on Gas Sensing and Antimicrobial Efficacy Applications.

Lanthanum oxide (LaO) nanoparticles (NPs) were synthesized via a green co-precipitation method using Coleus barbatus leaf extract as a reducing and capping agent, with CTAB as a stabilizer. X-ray diffraction (XRD) confirmed a hexagonal polycrystalline structure with an average crystallite size of 16 nm, further supported by Raman spectroscopy. Calcination temperature played a critical role: at 600 °C, incomplete precursor decomposition was observed, while 800 °C treatments led to oxygen vacancies and peak broadening.