多孔柿饼状BiOBr光催化剂的简易溶剂热法合成
Facile Solvothermal Synthesis of Porous Persimmon-like BiOBr Photocatalyst
作者单位E-mail
杨黄根 玉林师范学院化学与食品科学学院, 广西农产资源化学与生物技术重点实验室, 玉林 537000  
陈渊 玉林师范学院化学与食品科学学院, 广西农产资源化学与生物技术重点实验室, 玉林 537000 chenyuan197191@163.com 
王治伟 北京工业大学环境与能源工程学院化学化工系, 绿色催化与分离北京市重点实验室, 区域大气复合污染防治北京市重点实验室, 先进功能材料教育部重点实验室, 催化化学与纳米科学实验室, 北京 100124  
杨家添 玉林师范学院化学与食品科学学院, 广西农产资源化学与生物技术重点实验室, 玉林 537000  
朱立刚 玉林师范学院化学与食品科学学院, 广西农产资源化学与生物技术重点实验室, 玉林 537000  
覃利琴 玉林师范学院化学与食品科学学院, 广西农产资源化学与生物技术重点实验室, 玉林 537000  
戴洪兴 北京工业大学环境与能源工程学院化学化工系, 绿色催化与分离北京市重点实验室, 区域大气复合污染防治北京市重点实验室, 先进功能材料教育部重点实验室, 催化化学与纳米科学实验室, 北京 100124 hxdai@bjut.edu.cn 
摘要: 以硝酸铋和十六烷基三甲基溴化铵(CTAB)为Bi和Br源,采用聚乙烯吡咯烷酮(PVP)辅助溶剂热法首次成功制备了多孔纳米片聚结的柿饼状溴氧化铋(BiOBr)。通过多种分析技术对分级微米结构BiOBr材料的物化性质进行了表征,并对其在可见光照射下降解亚甲基蓝(MB)的光催化活性进行了评价。结果表明,溶剂热时间和PVP的加入量对产物的颗粒形貌和结晶度有显著影响。当加入0.7 g PVP时,120℃溶剂热处理12 h,可得到多孔纳米片聚结的柿饼状BiOBr样品。多孔柿饼状BiOBr样品的比表面积为4 m2·g-1,带隙能为2.64 eV,在可见光区具有较强的光吸收性能,具有良好的可见光驱动降解MB的光催化活性和稳定性。我们推断,多孔纳米片聚结的柿饼状BiOBr样品具有优良的可见光催化性能,这与该样品的较高比表面积、多孔结构、低带隙能以及独特的颗粒形貌有关。
关键词: 溶剂热合成  柿饼状BiOBr  分级微米结构  可见光光催化  有机染料降解
基金项目: 国家自然科学基金(No.21767029,No.51862034),广西科技计划项目-重点研发计划(No.桂科AB18050004),广西自然科学基金(No.2017GXNSFAA198197)和玉林师范学院校级科研项目(No.2017YJKY24)资助。
Abstract: Porous nanosheet-aggregated persimmon-like bismuth oxybromide (BiOBr) were successfully prepared for the first time using polyvinyl pyrrolidone (PVP)-assisted solvothermal strategy with bismuth nitrate and cetyltrimethyl ammonium bromide (CTAB) as Bi and Br sources. Physicochemical properties of the hierarchical microstructure BiOBr materials were characterized by means of numerous analytical techniques, and their photocatalytic activities were evaluated for the removal of methylene blue (MB) under visible-light illumination. It is found that the solvothermal time and PVP addition had a significant influence on the particle morphology and crystallinity of the product. The porous sheet-aggregated persimmon-like BiOBr sample could be obtained after solvothermal treatment at 120℃ for 12 h in the presence of 0.7 g PVP. The porous persimmon-like BiOBr sample with a surface area of 4 m2·g-1 and a bandgap energy of 2.64 eV possessed good optical absorption property in visible-light regions and showed excellent visible-light-driven photocatalytic activity and stability for MB degradation. It is concluded that the high visible-light-driven catalytic performance of the porous sheet-aggregated persimmon-like BiOBr sample is associated with its high surface area, porous structure, and low bandgap energy as well as the unique particle morphology.
Keywords: solvothermal synthesis  persimmon-like BiOBr  hierarchical microstructure  visible-light-driven photocatalysis  organic dye degradation
投稿时间:2019-05-16 修订日期:2019-11-14
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杨黄根,陈渊,王治伟,杨家添,朱立刚,覃利琴,戴洪兴.多孔柿饼状BiOBr光催化剂的简易溶剂热法合成[J].无机化学学报,2020,35(2):333-344.
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