HYDROTHERMAL SYNTHESIS OF NiS/CdS NANOCOMPOSITES WITH ENHANCED VISIBLE-LIGHT PHOTOCATALYTIC PERFORMANCE
نویسندگان
چکیده
Novel NiS/CdS heterostructures with enhanced visible-light photocatalytic activity were successfully prepared via a facile two-step hydrothermal process. The synthesized materials were characterized using X-ray diffraction, high-resolution transmission electron microscopy and UV-Vis diffuse reflectance spectroscopy. The photocatalytic activity was investigated by the degradation of quinoline under visible light irradiation. The experimental results reveal that the CdS samples are hexagonal phases with high crystallinity and purity. As-prepared NiS/CdS heterostructures exhibit a higher photocatalytic activity than pure CdS or NiS. The improvement was ascribed to the formation of p-n NiS/CdS heterojunction, which can promote the light absorption capability of photocatalyst and separation of excited electron-hole pairs.
منابع مشابه
Hydrothermal synthesis of photo-catalyst and photo-luminescence polymer-CdS flexible nanocomposites
CdS nanoparticles are II-VI group semiconductor in nature with suitable band gap for photoluminescence and photo-catalyst applications. CdS nanostructures were synthesized via a facile precipitation method in the presence of green capping agents such as starch, glucose, gelatin, salicylic acid in the green solvent of water. The influence of concentration, surfactant, precipitating agent on the ...
متن کاملPreparation of NiS/ZnIn2S4 as a superior photocatalyst for hydrogen evolution under visible light irradiation
In this study, NiS/ZnIn2S4 nanocomposites were successfully prepared via a facile two-step hydrothermal process. The as-prepared samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). Their photocatalytic performance for hydrogen evolution under visible li...
متن کاملHydrothermal Carbonation Carbon-Coated CdS Nanocomposite with Enhanced Photocatalytic Activity and Stability
Herein, a novel CdS nanocomposite is fabricated by a facile one-pot hydrothermal method assisted by glucose and polyvinylpyrrolidone (PVP). The as-prepared CdS is coated with a thin layer, which is determined to be hydrothermal carbonation carbon (HTCC) mainly containing semiconductive polyfuran. The as-prepared HTCC-coated CdS shows superior photocatalytic activity for the degradation of Rhoda...
متن کاملSynthesis and Characterization of CdS/g-C3N4/rGO Composite and Evaluation of its Photocatalytic Performance from Kinetics Perspective
In this research, CdS/g-C3N4 /rGO ternary composite was prepared by hydrothermal method and characterized using various techniques including X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM) and UV-Visible spectrophotometer. The photocatalytic activity of the prepared composite was evaluated from kinetics perspective by studying the removal of ciprofloxacin antibioti...
متن کاملSynthesis, Optical Properties, and Photocatalytic Activity of One-Dimensional CdS@ZnS Core-Shell Nanocomposites
One-dimensional (1D) CdS@ZnS core-shell nanocomposites were successfully synthesized via a two-step solvothermal method. Preformed CdS nanowires with a diameter of ca. 45 nm and a length up to several tens of micrometers were coated with a layer of ZnS shell by the reaction of zinc acetate and thiourea at 180 °C for 10 h. It was found that uniform ZnS shell was composed of ZnS nanoparticles wit...
متن کامل