Nano-Ag/ZnO photocatalyst and its catalytic performance for degradation of nonylphenol ethoxylate-10

作者：Zhang Jingfeng^*; Du Zhiping; Zhao Yonghong; Tai Xiumei

来源：Chinese Journal of Catalysis, 2007, 28(5): 457-462.

• silver
• zinc oxide
• ultraviolet light
• visible light
• photocatalysis
• degradation
• nonylphenol ethoxylate-10
• surfactant

Ag-modified nano-ZnO samples with different Ag loadings were prepared by the ammonia immersion method. The crystal structure, specific surface area, surface composition, and spectral characteristics were analyzed by X-ray diffraction, N-2 adsorption, X-ray photoelectron spectroscopy, and diffuse reflectance ultraviolet-visible spectroscopy, respectively. The photocatalytic activity of Ag/ZnO samples for degradation of nonylphenol ethoxylate-10 (NPE-10) was studied under the irradiation with ultraviolet tight and visible light. The results showed that Ag could be successfully supported on the nano-ZnO surface. The particle size of Ag/ZnO increased and its specific surface area decreased with the increase of Ag loading. Compared with the nano-ZnO, the binding energy of Ag 3d(5/2) in Ag/ZnO dropped, but the binding energy of Zn 2p and O 1s increased. The contents of adsorbed oxygen and hydroxy oxygen on the Ag/ZnO surface increased remarkably in contrast to that of the pure ZnO sample. The 0.5 % Ag/ZnO exhibited a red shift in the absorption spectrum. The photocatalytic activity of the 0.5 % Ag/ZnO sample was the highest, and the degradation rate of NPE-10 was 77 % and 56 % under 3 h irradiation of ultraviolet light and visible light, respectively.

• 出版日期2007-5
• 单位中国日用化学工业研究院