| 一种新型铋基光催化剂的合成及其可见光催化性能 |
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| 引用本文： | 刘佳佳, 王军, 张霞, 俞宁, 樊静. 一种新型铋基光催化剂的合成及其可见光催化性能[J]. 环境工程学报, 2015, 9(6): 2723-2730. doi: 10.12030/j.cjee.20150630 |
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| 作者姓名： | 刘佳佳 王军 张霞 俞宁 樊静 |
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| 作者单位： | 1.河南师范大学环境学院, 新乡 453007; 2.河南省新乡市环境监测站, 新乡 453003 |
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| 基金项目： | 国家自然科学基金资助项目(21377036) 河南省科技创新杰出人才计划(144200510004) 河南省重点科技攻关计划(102102210061) |
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| 摘 要： | 采用水热法合成铋基光催化剂Bi4VO8Br,通过X-射线粉末衍射、扫描电镜等手段对其进行表征.选择甲基橙为目标降解物来评价不同条件下合成的Bi4VO8Br在可见光下的光催化活性,发现pH 3、反应时间15 h、反应温度160℃为材料水热合成的最佳条件.考察了Bi4VO8Br在可见光及紫外光下对几种农药和增塑剂的光催化降解性能,显示了Bi4VO8Br对不易光解的含苯环有机物的可见光高活性.五氯酚的光催化过程影响因素优化结果表明,可见光和紫外光分别照射120 min和20 min,其降解率分别达到97%和99%,Bi4VO8Br表面上活性基团的捕获即空穴的氧化作用是主要反应原理.
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| 关 键 词： | 铋基光催化剂 合成 光催化活性 有机污染物 催化降解 |
| 收稿时间： | 2014-08-25 |
Preparation of a new bismuth based photocatalyst and its visible light photocataytic performance |
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| Liu Jiajia, Wang Jun, Zhang Xia, Yu Ning, Fan Jing. Preparation of a new bismuth based photocatalyst and its visible light photocataytic performance[J]. Chinese Journal of Environmental Engineering, 2015, 9(6): 2723-2730. doi: 10.12030/j.cjee.20150630 |
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| Authors: | Liu Jiajia Wang Jun Zhang Xia Yu Ning Fan Jing |
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| Affiliation: | 1.School of Environment, Henan Normal University, Xinxiang 453007, China; 2.Environmental Protection and Monitoring Station of Xinxiang, Xinxiang 453003, China |
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| Abstract: | Bi4VO8Br photocatalyst was synthesized by a simple hydrothermal method and characterized by XRD, SEM and other techniques. The photocatalytic activity of the as-prepared samples prepared under different conditions were evaluated by the degradation of methyl orange under visible light irradiation. It was found that pH 3, reaction time of 15 h and reaction temperature of 160℃ were the optimum reaction conditions for the preparation of Bi4VO8Br in the hydrothermal process. The photocatalytic degradation performance of Bi4VO8Br for several pesticides and plasticizers was also studied under visible and ultraviolet light irradiation. The results showed that under visible light irradiation, Bi4VO8Br exhibited high photocatalytic activity for the photolysis resistant organic pollutants containing benzene ring. In addition, the factors affecting the photodegradation process of pentachlorophenol were optimized. It was shown that 97% and 99% of pentachlorophenol were degraded under 120 min of visible light and 20 min of ultraviolet irradiation, respectively. Superficial hole oxidation was the main reaction mechanism. |
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| Keywords: | Bi-based photocatalyst preparation photocatalytic activity organic pollutants catalytic degradation |
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