Hydrothermal fabrication and visible-light-driven photocatalytic properties of bismuth vanadate with multiple morphologies and/or porous structures for Methyl Orange degradation

查看全文 作　　者：Haiyan [1]Jiang;Hongxing [1]Dai;Xue [1]Meng;Lei [1]Zhang;Jiguang [1]Deng;Yuxi [1]Liu;Chak Tong [2]Au

机构地区：[1]Laboratory of Catalysis Chemistry and Nanoscience,Department of Chemistry and Chemical Engineering,College of Environmental and Energy Engineering,Beijing University of Technology,Beijing 100124,China;[2]Department of Chemistry,Centre for Surface Analysis and Research,Hong Kong Baptist University,Kowloon Tong,Hong Kong,China

出　　处：《Journal of Environmental Sciences》索引2012年第24卷第3期,共9页

基　　金：supported by the National Natural Science Foundation of China (No. 20973017, 21077007);the Creative Research Foundation of Beijing University of Technology (No. 00500054R4003, 005000543111501);the HiTech Research and Development Program (863)of China (No. 2009AA063201);the Funding Projectfor Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality (No. PHR200907105, PHR201007105,PHR201107104);the Hong Kong Baptist University (FRG2/09-10/023) 摘　　要：Monoclinic BiVO4 with multiple morphologies and/or porous structures were fabricated using the hydrothermal strategy. The materials were characterized by means of the XRD, Raman, TGA/DSC, SEM, XPS, and UV-Vis techniques. The photocatalytic activities of the BiVO4 materials were evaluated for the degradation of Methyl Orange under visible-light irradiation. It is observed that pH value and surfactant exerted a great effect on the morphology and pore structure of the BiVO4 product. Spherical BiVO4 with porous structures, flower-cluster-like BiVO4, and flower-bundle-like BiVO4 were generated hydrothermally at 100°C with poly(vinyl pyrrolidone) (PVP) and urea (pH = 2) and at 160°C with NaHCO3 (pH = 7 and 8), respectively. The PVP-derived BiVO4 showed much higher surface areas (5.0-8.4 m2/g) and narrower bandgap energies (2.45-2.49 eV). The best photocatalytic performance of the spherical BiVO4 material with a surface area of 8.4 m2/g was associated with its higher surface area, narrower bandgap energy, higher surface oxygen vacancy density, and unique porous architecture. 关键词：多孔结构光催化性能甲基橙降解形态热液光驱动钒酸铋

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Hydrothermal fabrication and visible-light-driven photocatalytic properties of bismuth vanadate with multiple morphologies and/or porous structures for Methyl Orange degradation

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