对比采用溶剂热合成、传统固相合成与溶胶-凝胶合成技术,制备了四方相BiOC1和Nd3+掺杂BiOCl光催化材料.运用X射线粉末衍射(XRD)、扫描电子显微镜(SEM)及紫外-可见吸收光谱(UV-Vis),研究了不同合成方法所制备BiOCl材料的相结构、形貌和紫外-可见光吸收性能;并以甲基橙溶液为模拟废水,研究了不同方法所制备的BiOCl材料的光催化性能.结果表明:溶剂热合成的BiOCl是由纳米片组装成粒径小于1μm微球,紫外-可见吸收边为335 nm;固相合成所得BiOCl结晶度较高,其片状颗粒粒径约为6μm,紫外-可见吸收边为430n m;溶胶-凝胶合成法制得BiOCl片状颗粒粒径约为3～4 μm,紫外-可见吸收边为430 nm.进一步地对比研究了稀土离子Nd3+掺杂前后BiOCl样品的结构、紫外-可见光吸收特性,可以发现,Nd3+掺杂后样品的相结构及形貌均无变化,但吸收边均发生不同程度的红移,以溶胶-凝胶法制得的样品效果最为明显,并具有最优的光催化性能.
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