Abstract

This study reports the preparation of a new CdS&NiO/Ni₂O₃ photocatalyst having efficient and stable photocatalytic performance. The aim was to block the photocorrosion of CdS with maintaining photocatalytic activity. The prepared CdS and NiO/Ni₂O₃ particles were in the form of nanorods and nanoballs, respectively. Diffuse reflectance spectra (DRS), X-ray diffraction (XRD), ultraviolet-visible light (UV–vis), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), Raman analysis, electrochemical impedance and photoluminescence analysis were performed to evaluate structural, morphological and optical properties and their effect on photocatalytic activity. CdS&NiO/Ni₂O₃ catalysts absorbed visible light and enhanced charge separation than that of CdS and NiO/Ni₂O₃. The catalytic performance of the samples was tested on Congo red. The optimal content of CdS&NiO/Ni₂O₃ was observed in CN3 sample. XPS results of defective NiO with different oxygen species showed powerful photocatalytic activities. These prepared photocatalysts need to be explored further in the decomposition of various environmental pollutants.

摘要

本研究报道了一种具有高效稳定光催化性能的新型CdS&NiO/Ni ₂ O ₃光催化剂的制备。目的是在保持光催化活性的同时阻止 CdS 的光腐蚀。制备的CdS和NiO/Ni ₂ O ₃颗粒分别为纳米棒和纳米球的形式。漫反射光谱 (DRS)、X 射线衍射 (XRD)、紫外-可见光 (UV-vis)、扫描电子显微镜 (SEM)、X 射线光电子能谱 (XPS)、拉曼分析、电化学阻抗和光致发光分析用于评估结构、形态和光学特性及其对光催化活性的影响。CdS&NiO/Ni ₂ O ₃与CdS和NiO/Ni ₂ O ₃相比，催化剂吸收可见光并增强电荷分离。在刚果红上测试样品的催化性能。在CN3样品中观察到CdS&NiO/Ni ₂ O ₃的最佳含量。具有不同氧种类的缺陷 NiO 的 XPS 结果显示出强大的光催化活性。这些制备的光催化剂在分解各种环境污染物方面需要进一步探索。