title: Economic Hydrophobicity Triggering of CO2 Photoreduction for Selective CH4 Generation on Noble-Metal-Free TiO2-SiO2.
abstract: On the basis of the fact that the competitive adsorption between CO2 and H2O on the catalyst plays an important role in the CO2 photoreduction process, here we develop an economic NH4F-induced hydrophobic modification strategy to enhance the CO2 competitive adsorption on the mesoporous TiO2-SiO2 composite surface via a simple solvothermal method. After the hydrophobic modification, the CO2 photoreduction for the selective generation of CH4 over the noble-metal-free TiO2-SiO2 composite can be greatly enhanced (2.42 vs 0.10 μmol/g in 4h). The enhanced CO2 photoreduction efficiency is assigned to the rational hydrophobic modification on TiO2-SiO2 surface by replacing Si-OH to hydrophobic Si-F bonds, which will improve the CO2 competitive adsorption and trigger the eight-electron CO2 photoreduction on the reaction kinetics.
authors.affiliation: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, P.R. China.
authors.forename: Chunyang
authors.initials: C
authors.lastname: Dong
authors.affiliation: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, P.R. China.
authors.forename: Mingyang
authors.initials: M
authors.lastname: Xing
authors.affiliation: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, P.R. China.
authors.forename: Jinlong
authors.initials: J
authors.lastname: Zhang