4.6 Article

Synergistic Performance between Visible-Light Photocatalysis and Thermocatalysis for VOCs Oxidation over Robust Ag/F-Codoped SrTiO3

Journal

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 57, Issue 38, Pages 12766-12773

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.8b02873

Keywords

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Funding

  1. Natural Science Foundation of China [21776322, 21576298, U1663220, 21476271, 21425627]
  2. Science and Technology Program of Guangzhou [201804010154, 201804020025]
  3. Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program

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Catalytic oxidation is an important removal route of volatile organic compounds (VOCs) pollution. Traditional thermocatalytic oxidation requires either expensive noble metal catalysts or a high reaction temperature, while most photocatalytic oxidation suffers from a low efficiency for the purification of high concentration or refractory VOCs (e.g., aromatic compounds). Herein, we present an efficient visible-light-induced photothermocatalytic VOCs degradation way through constructing the fluorine ions and cheap Ag nanoparticles comodified SrTiO3 catalyst (Ag/F-STO). A photothermocatalytic synergistic effect is demonstrated on Ag/F-STO, providing a higher degradation efficiency than the contribution sum of photocatalytic oxidation and thermocatalytic oxidation. A higher toluene degradation rate constant than state-of-the-art photocatalytic toluene oxidation process and a (>) 95% conversion of benzene, toluene, and xylene mineralization are achieved on Ag/F-STO by photothermocatalysis at 90 degrees C upon visible light irradiation. The results provide a way for robust and economic VOCs removal and corresponding catalyst design.

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