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.
['Hernández-Gordillo|Agileo|A|', 'Arroyo|Missael|M|', 'Zanella|R|R|', 'Rodríguez-González|V|V|']
D002384:Catalysis D006834:Hydrazines D053768:Metal Nanoparticles D046529:Microscopy, Electron, Transmission D009596:Nitrophenols D044367:Phase Transition D055668:Photochemical Processes D012666:Semiconductors D012834:Silver D013499:Surface Properties D014025:Titanium
4-Nitrophenol photoconversion AgNPs photoactivity Hydrazine reactant TiO(2) sol–gel