title: Exceptional Visible-Light Activities of TiO2-Coupled N-Doped Porous Perovskite LaFeO3for 2,4-Dichlorophenol Decomposition and CO2Conversion.
abstract: In this work, TiO2-coupled N-doped porous perovskite-type LaFeO3nanocomposites as highly efficient, cheap, stable, and visible-light photocatalysts have successfully been prepared via wet chemical processes. It is shown that the amount-optimized nanocomposite exhibits exceptional visible-light photocatalytic activities for 2,4-dichlorophenol (2,4-DCP) degradation by ∼3-time enhancement and for CO2conversion to fuels by ∼4-time enhancement, compared to the resulting porous LaFeO3with rather high photoactivity due to its large surface area. It is clearly demonstrated, by means of various experimental data, especially for the ·OH amount evaluation, that the obviously enhanced photoactivities are attributed to the increased specific surface area by introducing pores, to the extended visible-light absorption by doping N to create surface states, and to the promoted charge transfer and separation by coupling TiO2. Moreover, it is confirmed from radical trapping experiments that the photogenerated holes are the predominant oxidants in the photocatalytic degradation of 2,4-DCP. Furthermore, a possible photocatalytic degradation mechanism for 2,4-DCP is proposed mainly based on the resultant crucial intermediate, 2-chlorosuccinic acid with m/z = 153, that readily transform into CO2and H2O. This work opens up a new feasible route to synthesize visible-light-responsive high-activity perovskite-type nanophotocatalysts for efficient environmental remediation and energy production.
authors.affiliation: Key Laboratory of Functional Inorganic Materials Chemistry, Heilongjiang University , Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Harbin 150080, P. R. China.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Humayun
authors.affiliation: Key Laboratory of Functional Inorganic Materials Chemistry, Heilongjiang University , Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Harbin 150080, P. R. China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Qu
authors.affiliation: Key Laboratory of Functional Inorganic Materials Chemistry, Heilongjiang University , Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Harbin 150080, P. R. China.
authors.forename: Fazal
authors.initials: F
authors.lastname: Raziq
authors.affiliation: Key Laboratory of Functional Inorganic Materials Chemistry, Heilongjiang University , Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Harbin 150080, P. R. China.
authors.forename: Rui
authors.initials: R
authors.lastname: Yan
authors.affiliation: Key Laboratory of Functional Inorganic Materials Chemistry, Heilongjiang University , Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Harbin 150080, P. R. China.
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Li
authors.affiliation: Key Laboratory of Functional Inorganic Materials Chemistry, Heilongjiang University , Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Harbin 150080, P. R. China.
authors.forename: Xuliang
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Functional Inorganic Materials Chemistry, Heilongjiang University , Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Harbin 150080, P. R. China.
authors.forename: Liqiang
authors.identifier: 0000-0002-3189-492X
authors.initials: L
authors.lastname: Jing
mesh_terms: D002384:Catalysis; D008027:Light; D053761:Nanocomposites / Q000737:chemistry*; D016062:Porosity