In Situ Growth of Vanadium Oxide on Reduced Graphene Oxide for the Low-Temperature NO-SCR by NH3
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2019年第3期
论文作者：李美颜 QI Yanyuan 金伟 JIAO Binqing ZHAO Jie
文章页码：572 - 578
摘 要：The vanadium oxide/reduced graphene oxide（V2 O5/rGO） composite catalyst which determined the selective catalytic reduction activity（SCR） of NO with NH3 was prepared by a simple solvothermal method. The physicochemical properties of the catalysts were characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, Raman, X-ray energy spectrometer（XPS） and N2 sorption isotherm measurement（BET）. Results of NH3-SCR showed that the NO conversion of V2 O5/rGO catalyst could reach 54.3% at 100 ℃. And the removal of NO increased to 74.6% when the temperature was up to 220 ℃. By characterizing the microstructure and morphology of the V2 O5/rGO catalysts prepared by in-situ growth and mechanical mixing methods, it was further shown that V2 O5 nanoparticles were highly dispersed and in situ growth on the rGO surface. Based on X-ray energy spectrometer, V2 O5/r GO catalyst had good low temperature denitrification performance due to the chemical adsorption oxygen and low-valent vanadium oxide contained in V2 O5/rGO catalyst, which was beneficial to the redox reaction between V2 O5 and graphene.
李美颜1，QI Yanyuan2，金伟1，JIAO Binqing1，ZHAO Jie1
1. State Key Laboratory of Silicate Materials for Architectures,School of Materials Science and Engineering,Wuhan University of Technology2. Center for Material Research and Analysis,Wuhan University of Technology
摘 要：The vanadium oxide/reduced graphene oxide（V2 O5/rGO） composite catalyst which determined the selective catalytic reduction activity（SCR） of NO with NH3 was prepared by a simple solvothermal method. The physicochemical properties of the catalysts were characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, Raman, X-ray energy spectrometer（XPS） and N2 sorption isotherm measurement（BET）. Results of NH3-SCR showed that the NO conversion of V2 O5/rGO catalyst could reach 54.3% at 100 ℃. And the removal of NO increased to 74.6% when the temperature was up to 220 ℃. By characterizing the microstructure and morphology of the V2 O5/rGO catalysts prepared by in-situ growth and mechanical mixing methods, it was further shown that V2 O5 nanoparticles were highly dispersed and in situ growth on the rGO surface. Based on X-ray energy spectrometer, V2 O5/r GO catalyst had good low temperature denitrification performance due to the chemical adsorption oxygen and low-valent vanadium oxide contained in V2 O5/rGO catalyst, which was beneficial to the redox reaction between V2 O5 and graphene.
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