División de Materiales Avanzados, Instituto Potosino de Investigación Científica y Tecnológica, Camino a la Presa San José 2055 Col. Lomas 4a. sección, C.P. 78216 San Luis Potosí, SLP, México; CIIEMAD, Instituto Politécnico Nacional, Calle 30 de Junio de 1520 s/n, Barrio la Laguna Ticomán, C.P. 07340, Del. Gustavo A. Madero, DF, México.
División de Materiales Avanzados, Instituto Potosino de Investigación Científica y Tecnológica, Camino a la Presa San José 2055 Col. Lomas 4a. sección, C.P. 78216 San Luis Potosí, SLP, México.
J Hazard Mater. 2014 Mar 15;268:84-91. doi: 10.1016/j.jhazmat.2013.12.069. Epub 2014 Jan 8.
The photocatalytic properties of functionalized TiO2 with silver nanoparticles (AgNPs) for the conversion of 4-nitrophenol to 4-aminophenol in the presence of hydrazine were investigated. The TiO2 semiconductor synthesized by the sol-gel method was functionalized with AgNPs at different loadings, and their structural and optical properties were characterized by several techniques. The functionalized TiO2 with 1.5wt% AgNPs presented the highest photocatalytic activity for the conversion of 4-nitrophenol with appropriate hydrazine concentrations (0.5M). The photoefficiency enhancement under UV light irradiation was attributed to the electron transfer from the TiO2 semiconductor surface to the adsorbed acceptor reactant (4-nitrophenol) through the deposited AgNPs.
研究了负载银纳米粒子（AgNPs）的功能化 TiO2 光催化剂在肼存在下将 4-硝基苯酚转化为 4-氨基酚的光催化性能。采用溶胶-凝胶法合成的 TiO2 半导体在不同负载量下进行了功能化，并通过多种技术对其结构和光学性能进行了表征。负载 1.5wt%AgNPs 的功能化 TiO2 在适当浓度的肼（0.5M）存在下对 4-硝基苯酚的转化表现出最高的光催化活性。在紫外光照射下的光电效率增强归因于电子从 TiO2 半导体表面通过沉积的 AgNPs 转移到吸附的受体反应物（4-硝基苯酚）。
