AgBr/BiVO_4催化剂的制备及可见光下降解酸性橙7的研究
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摘要
BiVO_4作为一种重要的半导体材料,因其具有无毒、价廉和稳定性好等优点,得到广泛的应用,但存在着光电子和空穴容易复合,吸附性能不强、光催化率不高以及回收处理比较难等问题。本文通过水热法-化学沉积方法制备AgBr/BiVO4复合光催化剂,通过XRD、PL、UV-DRS等方法分析表征物理化学性质,研究在可见光下对染料酸性橙7的降解,结果表明AgBr/BiVO4可见光照射90min后可以降解97.86%的酸性橙7。
BiVO_4 is an important semiconductor, which has been widely used because of its advantages of non-toxic, low price and good stability. However, there are many disadvantages such as the combination of photoelectrons and holes, low adsorption performance, low photocatalytic rate, and hard to recovery. AgBr/BiVO_4 composite photocatalyst was prepared by hydrothermal-chemical deposition method. The physicochemical properties were characterized by XRD, PL and UV-DRS. The degradation of dye Acid Orange 7 under visible light was studied. The results showed that AgBr/BiVO_4 could degrade 97.86% acid orange 7 after 90 min irradiation.
BiVO_4 is an important semiconductor, which has been widely used because of its advantages of non-toxic, low price and good stability. However, there are many disadvantages such as the combination of photoelectrons and holes, low adsorption performance, low photocatalytic rate, and hard to recovery. AgBr/BiVO_4 composite photocatalyst was prepared by hydrothermal-chemical deposition method. The physicochemical properties were characterized by XRD, PL and UV-DRS. The degradation of dye Acid Orange 7 under visible light was studied. The results showed that AgBr/BiVO_4 could degrade 97.86% acid orange 7 after 90 min irradiation.
引文
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[2]龙明策,蔡俊,蔡伟民,等.设计新型可见光响应的半导体光催化剂[J].化学进展, 2006,(09):1065-1075.
[3]程林梅,蔡河山,黎晓霞,等.新型可见光催化剂钒酸铋Bi VO4的制备及改性研究进展[J].安徽农学通报,2017,23(24):9-13.
[4]刘琼君,林碧洲,李培培,等.BiPO4/BiVO4复合材料的制备及可见光催化活性[J].高等学校化学学报,2017,38(01):94-100.
[5]周慧,杜彬,陈丽萍.三种形貌Bi VO4微纳材料的制备及其光催化性能研究[J].化学研究与应用,2016,28(10):1494-1499.
[6]刘思瑶,王永强,赵东风,等.BiOI/BiVO4异质结光催化剂的合成及其催化活性的研究[J].人工晶体学报,2016,45(01):15-20.
[7]朱明山,陈鹏磊,刘鸣华.银/卤化银:一类新型等离子体光催化剂[J].化学进展, 2013, 25(Z1):209-220.
[8]张丽红,刘小琳. Ag@AgCl/BiVO4复合光催化剂的制备及光催化性能[J].环境工程学报, 2016, 10(12):7081-7085.
[9]YanSang,YanHuang,WuWang,etal.LowcostvisiblelightdrivenplasmonicAg@AgBr/BiVO4system:fabricationand application as an efficient photocatalyst[J]. Rsc Advances, 2015, 5(50):39651-39656.
[10] DeyongWu,MingceLong.Realizingvisible-light-inducedself-cleaningpropertyofcottonthroughcoatingN-TiO2filmand loading AgI particles[J]. Acs Applied Materials&Interfaces, 2011, 3(12):4770-4774.
[11] Xinjun Wang, Xiaoli Wan, Xiaoning Xu, et al. Facile fabrication of highly efficient AgI/ZnO heterojunction and its application of methylene blue and rhodamine B solutions degradation under natural sunlight[J]. Applied Surface Science, 2014, 321:10-18.
[12] HaiLi Lin, Jing Cao, BangDe Luo, et al. Visible-light photocatalytic activity and mechanism of novel AgBr/BiOBr prepared by deposition-precipitation[J]. Chinese Science Bulletin, 2012, 57(22):2901-2907.