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材料工程  2015, Vol. 43 Issue (9): 6-11    DOI: 10.11868/j.issn.1001-4381.2015.09.002
  材料与工艺 本期目录 | 过刊浏览 | 高级检索 |
pH值对乙二醇溶胶-凝胶法制备BiVO4光催化性能的影响
王敏, 郑浩岩, 杨长秀, 高兴莹, 董竹希文, 罗洋, 陈垚
沈阳理工大学 环境与化学工程学院, 沈阳 110159
Effect of pH Value on Photocatalytic Properties of BiVO4 Prepared by Ethylene Glycol Sol-gel
WANG Min, ZHENG Hao-yan, YANG Chang-xiu, GAO Xing-ying, DONG Zhu-xi-wen, LUO Yang, CHEN Yao
School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China
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摘要 采用乙二醇溶胶-凝胶法制备了BiVO4样品,研究了不同反应pH值对样品的形貌及光催化活性的影响。通过SEM,XRD,XPS和UV-Vis等表征手段对样品的形貌、物相以及光学性能进行表征和分析。结果表明:所制备的样品纯度较高,均为单斜型BiVO4光催化剂,并且随着反应pH值的改变,样品的形貌及光学性能也随之改变;当pH值为5时,产物为不规则的片状结构;当pH值增至7和9时,产物片状结构大量减少,表现出明显的颗粒状结构;当反应 pH值增至11和13时,产物颗粒状结构团聚明显。当pH值为9时,所制备的样品具有最小的禁带宽度以及最小的晶体粒径,并且表现出最高的光催化活性,在250W金属卤化物灯下光照50min,对甲基橙的脱色率可达66.23%。
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王敏
郑浩岩
杨长秀
高兴莹
董竹希文
罗洋
陈垚
关键词 钒酸铋乙二醇光催化甲基橙溶胶-凝胶    
Abstract:The visible-light-driven BiVO4 photocatalysts were synthesized by ethylene glycol sol-gel method. The effect of different pH values on microstructure and photocatalytic properties of BiVO4 was studied. The samples were characterized by SEM, XRD, XPS and UV-Vis DRS analyses. The results show that all samples have high purity and all samples are monoclinic.The morphology and photocatalytic properties of the samples change when the pH value changes. When the pH value is 5, the sample is irregular lamellar structure;when the pH value increases to 7 and 9, the sample shows obvious granular structure and much less sample for the irregular structure;when the pH value increases to 11 and 13, the granular structure has the phenomenon of aggregation. The sample of pH=9 has the smallest band gap energy and the minimum grain size, and shows the highest photocatalytic activity. The total decoloration rate of methyl orange is 66.23% under 250W metal halide light for 50min.
Key wordsbismuth vanadate    ethylene glycol    photocatalysis    methyl orange    sol-gel
收稿日期: 2014-12-01      出版日期: 2015-09-26
中图分类号:  O643  
通讯作者: 王敏(1975-),女,副教授,博士,研究方向:光催化材料,联系地址:辽宁省沈阳市浑南新区南屏中路6号沈阳理工大学环境与化学工程学院(110159),E-mail:minwang62@msn.com     E-mail: minwang62@msn.com
引用本文:   
王敏, 郑浩岩, 杨长秀, 高兴莹, 董竹希文, 罗洋, 陈垚. pH值对乙二醇溶胶-凝胶法制备BiVO4光催化性能的影响[J]. 材料工程, 2015, 43(9): 6-11.
WANG Min, ZHENG Hao-yan, YANG Chang-xiu, GAO Xing-ying, DONG Zhu-xi-wen, LUO Yang, CHEN Yao. Effect of pH Value on Photocatalytic Properties of BiVO4 Prepared by Ethylene Glycol Sol-gel. Journal of Materials Engineering, 2015, 43(9): 6-11.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.09.002      或      http://jme.biam.ac.cn/CN/Y2015/V43/I9/6
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