溶胶-凝胶法制备Eu~(3+)掺杂BiVO_4及其可见光光催化性能
Photocatalytic Property of Eu/BiVO_4 Photocatalyst by Citric Acid Sol-Gel Method
查看参考文献20篇
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文摘
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采用柠檬酸络合溶胶-凝胶法制备了Eu~(3+)掺杂BiVO_4新型光催化剂,通过XPS、XRD、SEM、BET和UV-Vis等手段对其进行表征和分析。并以甲基橙为模拟污染物,考察了BiVO_4的可见光催化活性。结果表明, Eu~(3+)掺杂前后BiVO_4均为单斜白钨矿型,无其他杂质相生成,且由于掺杂Eu~(3+),晶体中V4+和氧空缺增多。掺杂后样品光吸收性能发生红移,但掺杂对其形貌和比表面积改变较小。Eu~(3+)掺杂有效提高了BiVO_4的可见光催化活性,当Eu~(3+)掺杂量为0.2mol%时, BiVO_4光催化效率最高, 50 min内对甲基橙溶液的脱色率达95%,比纯BiVO_4提高了62%左右。 |
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其他语种文摘
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Eu~(3+)-doped BiVO_4 photocatalyst was synthesized by complexing Sol-Gel method using citric acid as chelate, and characterized with X-ray photoelectron spectroscope(XPS), X-ray diffraction(XRD), scanning electron microscope(SEM), specific surface area (BET) and UV-Vis diffuse reflectance spectroscope(DRS). The photocatalytic activity was evaluated by photocatalytic degradation of methyl orange (MO) solution under visible light. It revealed that pure BiVO_4 and all the Eu~(3+) doped samples were monoclinic phase and no peaks of any other phases or impurities were detected. It was also found that doping Eu~(3+) increased the amount of V4+ and oxygen vacancies. In addition, the light absorption edges of Eu~(3+) doped BiVO_4 had extended a red shift compared with that of pure BiVO_4. However, Eu~(3+) doping had little influence on morphology and specific surface area. The appropriate amount of Eu~(3+) doping could signifcantly increase the photocatalytic activity and the highest photocatalytic degradation rate was about 95% when the Eu~(3+) doping amount was 0.2%, which was more 62% than that of pure BiVO_4 under 50 min visible light irridation. |
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来源
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无机材料学报
,2013,28(2):153-158 【核心库】
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DOI
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10.3724/sp.j.1077.2013.12195
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关键词
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钒酸铋
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光催化剂
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Eu~(3+)掺杂
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甲基橙
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地址
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1.
沈阳理工大学环境与化学工程学院, 沈阳, 110159
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辽沈工业集团有限公司, 沈阳, 110116
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-324X |
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学科
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化学 |
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基金
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国家自然科学基金
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辽宁省教育厅项目
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文献收藏号
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CSCD:4756976
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