碘离子掺杂的对苯二甲酸铋的可见光催化降解罗丹明B

发布时间：2018-01-13 22:24

本文关键词：碘离子掺杂的对苯二甲酸铋的可见光催化降解罗丹明B　出处：《中南民族大学学报(自然科学版)》2016年04期 　论文类型：期刊论文

【摘要】：为研究基于铋的金属有机化合物的可见光活性,利用溶剂热方法,将1.33 mmol硝酸铋和对苯二甲酸首先合成了有机金属化合物对苯二甲酸铋,在此基础上分别掺入相对于硝酸铋物质的量的0.5,0.75,1,2倍的碘化钠后进行溶剂热合成了4种碘离子掺杂的对苯二甲酸铋催化剂,并用红外光谱(IR)、扫描电镜(SEM)、光电子能谱(XPS)、粉末X-射线衍射(XRD)、紫外-可见固体漫反射(UV-Vis DRS)对其进行结构表征.用可见光对20 mg/L的罗丹明B进行降解研究了其光催化性能.结果表明:0.75倍碘化钠掺杂的对苯二甲酸铋显示了很好的可见光降解Rh B催化活性,因为前者表面碘化后对染料的吸附量增大,超氧自由基和光生空穴是可见光降解中的主要活性物种.
[Abstract]:In order to study the visible light activity of organometallic compounds based on bismuth, bismuth terephthalate was first synthesized from 1. 33 mmol bismuth nitrate and terephthalic acid by solvothermal method. On this basis, four kinds of iodide doped bismuth terephthalate catalysts were prepared by solvothermal reaction of sodium iodide, which is two times higher than that of bismuth nitrate. Infrared spectra (IR), scanning electron microscopy (SEM), photoelectron spectroscopy (XPS) and powder X-ray diffraction (XRD) were used. UV-Vis DRS). The structure of Rhodamine B was characterized by visible light. The photocatalytic properties of Rhodamine B at 20 mg/L were studied. Bismuth terephthalate doped with 0.75 times sodium iodide showed good catalytic activity for RHB degradation under visible light. Because the adsorption amount of dyes increased after iodization on the surface of the former, superoxide free radicals and photogenerated holes are the main active species in visible light degradation.
【作者单位】：中南民族大学化学与材料科学学院;
【基金】：中央高校基本科研业务费专项资金资助项目(CZY14004) 中南民族大学国家民族药学实验教学中心项目
【分类号】：X505;O643.36
【正文快照】： 能源短缺和环境污染是工业化发展引起的全球性的问题,利用太阳能来解决环境和能源问题越来越受到重视,可见光响应的光催化剂在降解有机污染物,保护环境方面得到了广泛的应用.由于铋的具有低毒、能带间隙较小、在可见光范围内有吸收且稳定性好等特点,使基于铋的光催化剂表现出

【相似文献】