【摘要】 本文采用溶剂热法制备了不同Cl-Br摩尔比的BiOCl_xBr_1-x,并借助X射线衍射仪（XRD）、扫描电子显微镜（SEM）及透射电子显微镜（TEM）对其进行了检测与表征.结果表明,该试验方法能够得到较好晶体结构的BiOCl_xBr_1-x光催化剂.通过使用不同Cl-Br摩尔比的BiOCl_xBr_1-x对甲基橙（MO）溶液进行降解后发现,BiOCl_0.4Br_0.6光催化剂的降解性能最好,在180 min时其降解率可达39.7%,优于单卤纯BiOCl（180 min时降解率为13.6%）和纯BiOBr（180 min时降解率为21.8%）的降解性能.然后,又使用紫外可见光谱仪（UV-vis）、光致发光光谱仪（PL）对BiOCl_xBr_1-x光催化性能进行了检测分析;为进一步弄清BiOCl_xBr_1-x的光催化机理,又对加入抑制剂BiOCl_0.4Br_0.6光催化剂进行了对比试验,结果表明h+在光降解过程中起主要的催化作用.更多还原

【Abstract】 BiOCl_xBr_1-xwith different Cl-Br mole ratios made by solvothermal method was studied,and was characteristed by X-ray diffraction（ XRD）,scanning electron microscopy（ SEM） and transmission electron microscope（ TEM）. The results show that by using this method,BiOCl_xBr_1-xphotocatalyst with better crystal structure can be obtained. After the degradation of methyl orange（ MO）solution for BiOCl_xBr_1-xwith different Cl-Br molar ratios,it was found that material BiOCl_0.4Br_0.6 had the best degradation performance,and the degradation rate was up to 39. 7% at 180 min,and the degradation performance of the pure BiOCl（ degradation rate of 13. 6% at 180 min） was better than the pure BiOBr（ 21. 8% degradation at 180 min）. Then,the photocatalytic activity of BiOCl_xBr_1-xwas detected by UV-vis and photoluminescence spectroscopy（ PL）. In order to further understand the photocatalytic mechanism of BiOCl_xBr_1-x,inhibitors were adopted in BiOCl_0.4Br_0.6 photocatalyst,and the results show that the h+plays a major role in the photodegradation process.更多还原