首页 | 本学科首页   官方微博 | 高级检索  
     检索      

单分散g-C3N4量子点修饰一维棒状BiPO4微晶的合成及其对光催化活性增强机理
引用本文:王丹军,申会东,郭莉,岳林林,付峰.单分散g-C3N4量子点修饰一维棒状BiPO4微晶的合成及其对光催化活性增强机理[J].无机化学学报,2016,32(7):1246-1254.
作者姓名:王丹军  申会东  郭莉  岳林林  付峰
作者单位:延安大学化学与化工学院, 陕西省化学反应工程重点实验室, 延安 716000,延安大学化学与化工学院, 陕西省化学反应工程重点实验室, 延安 716000,延安大学化学与化工学院, 陕西省化学反应工程重点实验室, 延安 716000;陕西师范大学材料科学与工程技术学院, 西安 716000,延安大学化学与化工学院, 陕西省化学反应工程重点实验室, 延安 716000,延安大学化学与化工学院, 陕西省化学反应工程重点实验室, 延安 716000
基金项目:国家自然科学基金(No.21373159)、陕西省科技项目(No.2013K11-08,2013SZS20-P01,2015YG174)、陕西省教育厅科研基金项目(No.15JS119)、延安大学基金(No.2013YDZ-07,YDBK2013-11)和延安大学研究生科研创新项目(No.YCX201602)资助项目。
摘    要:利用水热法合成了一维棒状BiPO4微晶,在此基础上采用浸渍-焙烧法进行g-C3N4量子点表面修饰获得新颖的g-C3N4/BiPO4异质结。借助X射线衍射(XRD)、场发射扫描电镜(FE-SEM)、透射电镜(HRTEM)、能谱(EDS)、紫外-可见漫反射(UV-Vis-DRS)等测试手段对所得样品的相组成、形貌和谱学特征进行了表征。选择罗丹明B(RhB)和苯酚作为模型污染物研究了所得在可见光下的催化活性。结果表明,样品16%(w/w) g-C3N4/BiPO4对RhB降解的速率常数分别是纯g-C3N4和BiPO4的4.6倍和15倍。g-C3N4量子点与BiPO4之间形成异质结,抑制了光生电子-空穴对的复合,从而提高了催化剂的活性。自由基捕获实验进一步表明,超氧负离子自由基(·O2-)是催化降解RhB和苯酚的主要活性物种。

关 键 词:一维棒状BiPO4微晶  g-C3N4量子点  表面修饰  活性增强机理
收稿时间:1/2/2016 12:00:00 AM
修稿时间:2016/5/23 0:00:00

Synthesis of Monodispersed g-C3N4 Quantum Dots (QDs) Decorated on the Surface of 1D Rod-like BiPO4 with Enhanced Photocatalytic Activities
WANG Dan-Jun,SHEN Hui-Dong,GUO Li,YUE Lin-Lin and FU Feng.Synthesis of Monodispersed g-C3N4 Quantum Dots (QDs) Decorated on the Surface of 1D Rod-like BiPO4 with Enhanced Photocatalytic Activities[J].Chinese Journal of Inorganic Chemistry,2016,32(7):1246-1254.
Authors:WANG Dan-Jun  SHEN Hui-Dong  GUO Li  YUE Lin-Lin and FU Feng
Institution:College of Chemistry &Chemical Engineering, Yan''an University, Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan''an, Shaanxi 716000, China,College of Chemistry &Chemical Engineering, Yan''an University, Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan''an, Shaanxi 716000, China,College of Chemistry &Chemical Engineering, Yan''an University, Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan''an, Shaanxi 716000, China;School of Materials Science and Engineering, Shaanxi Normal University, Xi''an 710119, China,College of Chemistry &Chemical Engineering, Yan''an University, Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan''an, Shaanxi 716000, China and College of Chemistry &Chemical Engineering, Yan''an University, Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan''an, Shaanxi 716000, China
Abstract:1D rod-like BiPO4 have been successfully synthesized via a hydrothermal process, and g-C3N4 quantum dots(QDs) was decorated on the surface of BiPO4 to form a novel g-C3N4/BiPO4 heterojunction via a followed impregnation-calcinations method. XRD, FE-SEM, HR-TEM, EDS and UV-Vis-DRS techniques were employed to characterize the phase composition, morphology and spectrum properties of as-synthesized samples. The photocatalytic activities of samples were evaluated by degradation of RhB and phenol under visible light irradiation. The results also shows that 16%(w/w) g-C3N4/BiPO4 photocatalysts possesses the maximal k value of 0.348 min-1, which is 15 and 4.6 times higher than that of pure BiPO4 and g-C3N4, respectively. The catalytic efficiency enhancement of g-C3N4/BiPO4 heterojunctions relative to pure-BiPO4 can be attributed to the formation of heterojunctions between g-C3N4 QDs and BiPO4, which suppresses the recombination of photogenerated electron-holes. The radical scavengers test further confirmed that ·O2- was the main reactive species during the photocatalytic process. Therefore, this work provides a facile process for the design of novel and efficient BiPO4-based photocatalyst with multi-components.
Keywords:rod-like BiPO4 microcrystal  g-C3N4 quantum dots (QDs)  decoration  photocatlaytic activity enhancement mechanism
点击此处可从《无机化学学报》浏览原始摘要信息
点击此处可从《无机化学学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号