钒酸铋
光催化
钒酸盐
单斜晶系
铋
亚甲蓝
可见光谱
核化学
辐照
无机化学
材料科学
热液循环
化学
化学工程
晶体结构
催化作用
冶金
结晶学
有机化学
物理
工程类
核物理学
光电子学
作者
Yue Shen,Miaoliang Huang,Yi Huang,Jianming Lin,Jihuai Wu
标识
DOI:10.1016/j.jallcom.2010.01.144
摘要
Bismuth vanadate powders were prepared by hydrothermal method with NaVO3 and Bi(NO3)3 as starting materials and with Na2CO3 to adjust pH, and characterized by XRD, SEM, EDS and surface area analyzer. The results showed that the phase formation of bismuth vanadate depended on the adding amount of Na2CO3. The bismuth vanadate samples existed as monoclinic BiVO4 by adding 0.019 and 0.038 mol of Na2CO3 with corresponding pH value of 0.2 and 5.8, respectively, and as Bi4V2O11 by adding 0.057 mol of Na2CO3 with corresponding pH value of 9.7. The photocatalytic activities of the samples were evaluated by the decolorization of methylene blue (MB) under visible light irradiation. The sample with monoclinic form obtained by adding 0.019 mol of Na2CO3 had the highest photocatalytic activity, the decolorization rate of MB reached to 96.4% under visible light irradiation in 200 min and the reaction rate constant was 0.015 min−1.
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