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A bamboo-inspired hierarchical nanoarchitecture of Ag/CuO/TiO2 nanotube array for highly photocatalytic degradation of 2,4-dinitrophenol

Zhang, Xuhong, Wang, Longlu, Liu, Chengbin, Ding, Yangbin, Zhang, Shuqu, Zeng, Yunxiong, Liu, Yutang, Luo, Shenglian
Journal of hazardous materials 2016 v.313 pp. 244-252
2,4-dinitrophenol, absorption, active sites, cupric oxide, irradiation, lighting, nanosheets, nanosilver, nanotubes, nitrophenols, photocatalysis, photocatalysts, photosynthesis, pollutants, silver, titanium dioxide
The optimized geometrical configuration of muitiple active materials into hierarchical nanoarchitecture is essential for the creation of photocatalytic degradation system that can mimic natural photosynthesis. A bamboo-like architecture, CuO nanosheets and Ag nanoparticles co-decorated TiO2 nanotube arrays (Ag/CuO/TiO2), was fabricated by using simple solution-immersion and electrodeposition process. Under simulated solar light irradiation, the 2,4-dinitrophenol (2,4-DNP) photocatalytic degradation rate over Ag/CuO/TiO2 was about 2.0, 1.5 and 1.2 times that over TiO2 nanotubes, CuO/TiO2 and Ag/TiO2, respectively. The enhanced photocatalytic activity of ternary Ag/CuO/TiO2 photocatalyst was ascribed to improved light absorption, reduced carrier recombination and more exposed active sites. Moreover, the excellent stability and reliability of the Ag/CuO/TiO2 photocatalyst demonstrated a promising application for organic pollutant removal from water.