A Ag/NiO nanocomposite photocatalyst was synthesized by sol-gel route without using any surfactant, and it was utilized for the mineralization of the organic pollutant rhodamine B (RhB) dye. The HR-TEM result confirms the formation of a close interface between Ag and NiO, the X-ray diffraction pattern also confirms the formation of Ag/NiO nanocomposite. UV–vis absorbance spectra of RhB ratified that modified NiO nanoparticles have higher photocatalytic mineralization efficiency (up to 97%) than undoped NiO under UV light and Ag doped NiO exhibited the utmost photocatalytic performance with the highest turnover frequency (TOF) up to date and followed pseudo-first-order kinetics. The recyclability measurement of the photocatalyst as well as the XRD results of the used catalyst confirms zero corrosion of the photocatalyst. The result of the photocatalytic experiments demonstrates that introduction of Ag with NiO restrains the process of charge recombination between photogenerated electrons/holes and consequently facilitates the mineralization of RhB dye.

不使用任何表面活性剂，通过溶胶-凝胶法合成了一种Ag/NiO纳米复合光催化剂，并将其用于有机污染物罗丹明B（RhB）染料的矿化。HR-TEM 结果证实了 Ag 和 NiO 之间形成了紧密的界面，X 射线衍射图也证实了 Ag/NiO 纳米复合材料的形成。RhB 的紫外可见吸收光谱证实，在紫外光下，改性的 NiO 纳米粒子比未掺杂的 NiO 具有更高的光催化矿化效率（高达 97%），Ag 掺杂的 NiO 表现出最高的光催化性能和最高的转换频率（TOF）。遵循伪一级动力学。光催化剂的可回收性测量以及所用催化剂的 XRD 结果证实了光催化剂的零腐蚀。