Photoconversion of 4-nitrophenol in the presence of hydrazine with AgNPs-TiO2 nanoparticles prepared by the sol-gel method.
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.
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. Electronic address: agileo12@hotmail.com.
Agileo
A
Hernández-Gordillo
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.
Missael
M
Arroyo
Centro de Ciencias Aplicadas y Desarrollo Tecnológico, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, A.P. 70-186, Delegación Coyoacán, C.P. 04510 México, DF, México.
R
R
Zanella
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.
V
V
Rodríguez-González
D002384:Catalysis; D006834:Hydrazines / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D009596:Nitrophenols / Q000737:chemistry*; D044367:Phase Transition; D055668:Photochemical Processes; D012666:Semiconductors; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
D006834:Hydrazines; D009596:Nitrophenols; C009495:titanium dioxide; C029424:hydrazine; D012834:Silver; D014025:Titanium; C024836:4-nitrophenol
4-Nitrophenol photoconversion; AgNPs photoactivity; Hydrazine reactant; TiO(2) sol–gel