BiOClxBr1-x溶剂热法的制备及其光催化氧化性能

BiOClxBr1-x溶剂热法的制备及其光催化氧化性能

杨帆;宋金玲;张胤;王强;李伦;陈家宽;孙贺伟;王瑞芬

【期刊名称】《内蒙古科技大学学报》 【年(卷),期】2017(036)003

【摘要】本文采用溶剂热法制备了不同 Cl-Br摩尔比的BiOClxBr1 -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BiOClxBr1 -x光催化剂.通过使用不同 Cl -Br 摩尔比的 BiOClxBr1-x对甲基橙(MO)溶液进行降解后发现, BiOCl0.4Br0.6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BiOClxBr1-x光催化性能进行了检测分析;为进一步弄清BiOClxBr1-x的光催化机理,又对加入抑制剂BiOCl0.4Br0.6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.%BiOClxBr1-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

results

show

transmission that

by

electron u-sing

this

microscope(TEM).The

method,BiOClxBr1-xphotocatalyst with better crystal structure can be obtained.After the degradation of methyl orange(MO) solution forBiOCl xBr1-xwith different Cl -Br molar ratios,it was found that material BiOCl 0.4Br0.6had the best degradation perform-ance,and the degradation