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材料导报  2021, Vol. 35 Issue (6): 6001-6007    https://doi.org/10.11896/cldb.20040256
  无机非金属及其复合材料 |
Nb2O5/BiOClⅡ型异质结的构建及增强光催化还原二氧化碳
伍书祺1, 黄泽皑1,2, 李晴川1, 饶志强1, 周莹1,2
1 西南石油大学新能源与材料学院,新能源材料及技术研究中心,成都 610500
2 油气藏地质及开发工程国家重点实验室,成都 610500
Construction of Type Ⅱ Heterojunction of Nb2O5/BiOCl for Enhanced Photocatalytic Carbon Dioxide Reduction
WU Shuqi1, HUANG Ze'ai1,2, LI Qingchuan1, RAO Zhiqiang1, ZHOU Ying1,2
1 The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China
2 State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu 610500, China
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摘要 本工作设计制备了Ⅱ型异质结Nb2O5/BiOCl复合材料并用于光催化还原二氧化碳。首先构建了两种比例异质结构(5%(质量分数,下同)和11%),通过透射电镜(TEM)发现两种材料结合存在界面,利用X射线光电子能谱(XPS)仪对材料的表面元素进行分析,随后进行价带位置测定,并根据UV-vis固体漫反射图谱推导材料禁带宽度,进而证实材料间形成了Ⅱ型异质结构。异质结构材料对可见光吸光能力有所增强,荧光光谱(PL)表明异质结构复合材料的光生电子和空穴分离能力得到了提高。光催化还原二氧化碳活性测试表明,5% Nb2O5加入能够有效提高材料光催化还原二氧化碳的活性,其中还原产物CO、CH4、H2的产率分别为单独BiOCl的1.3倍、2.8倍、1.9倍,分别是单独Nb2O5的2.7倍、2.0倍、1.1倍。最后结合价带位置、禁带宽度,提出了Nb2O5/BiOCl在光催化还原二氧化碳中的反应可能路径。本研究可为设计高效BiOCl基异质结构材料用于光催化还原二氧化碳提供新思路。
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伍书祺
黄泽皑
李晴川
饶志强
周莹
关键词:  BiOCl  Nb2O5  Ⅱ型异质结  光催化  二氧化碳    
Abstract: In this work, a type Ⅱ heterojunction of Nb2O5/BiOCl composite material was prepared and applied to photocatalytic reduction of carbon dioxide (CO2). Different weight percentages (5wt% and 11wt%) of Nb2O5 was applied to fabricate different composition of type Ⅱ heterojunction of Nb2O5/BiOCl materials, the interface between the two materials was observed using transmission electron microscopy (TEM). The formation of type Ⅱ heterojunction was confirmed with the measurement of the position of the valence band using X-ray photoelectron spectroscopy (XPS), together with the width of the forbidden band derived from UV-vis diffuse reflection spectra. It was found that this type Ⅱ heterojunction material enhanced the visible light absorption range. The fluorescence spectrum (PL) showed that the ability of photogenerated electrons-hole separation efficiency was improved. As a result, the photocatalytic activities for the CO2 reduction indicated the activity of all the produced products was improved over type Ⅱ heterojunction of 5wt% Nb2O5/BiOCl. The yields of the products of CO, CH4, and H2 were 1.3 times, 2.8 times, and 1.9 times that of bare BiOCl; and 2.7 times, 2.0 times, 1.1 times that of bare Nb2O5, respectively. Finally, the possible reaction ways of CO2 over Nb2O5/BiOCl was proposed. This work might provide a new idea for the design of an efficient BiOCl-based heterostructure for photocatalytic CO2 reduction.
Key words:  BiOCl    Nb2O5    type Ⅱ heterojunction    photocatalyst    carbon dioxide
               出版日期:  2021-03-25      发布日期:  2021-03-23
ZTFLH:  TB332  
基金资助: 国家自然科学基金(U1862111);西南石油大学启航计划(2018QHZ020);四川省国际科技合作与交流研发项目(2019YFH0164);西南石油大学第十九期(2019—2020学年)大学生课外开放实验重点项目(KSZ19526)
通讯作者:  zeai.huang@swpu.edu.cn;yzhou@swpu.edu.cn   
作者简介:  伍书祺,西南石油大学,硕士研究生。2013年9月至2017年6月,在华东理工大学获得学士学位。2017年9月至今,在西南石油大学攻读硕士学位。
黄泽皑,讲师,硕士研究生导师。 2018年3月获日本京都大学工学博士学位,于2018年4月在日本国立先进工业科学技术研究院(AIST)进行博士后研究。 2018年9月入职西南石油大学,主要从事非常规天然气的高值利用研究。发表20余篇SCI论文,引用700多次,个人H指数为13。
周莹,西南石油大学教授,博士研究生导师。“长江学者奖励计划”青年学者、德国洪堡学者、日本JSPS邀请学者、四川省特聘专家、四川省有突出贡献的优秀专家、日本京都大学讲座教授。2004年毕业于中南大学无机非金属材料专业,2007年获中国科学院上海光学精密机械研究所材料学硕士学位,2010年获瑞士苏黎世大学(UZH)博士学位,之后获得苏黎世大学优秀青年基金资助从事博士后研究,并在洪堡基金会的资助下在德国卡尔斯鲁厄理工学院(KIT)从事研究工作。发表SCI论文120余篇,被SCI正面引用3 400多次,H指数为34。其研究团队主要从事的研究包括:太阳能化学转化;材料原位表征技术;油气资源利用相关催化材料等。
引用本文:    
伍书祺, 黄泽皑, 李晴川, 饶志强, 周莹. Nb2O5/BiOClⅡ型异质结的构建及增强光催化还原二氧化碳[J]. 材料导报, 2021, 35(6): 6001-6007.
WU Shuqi, HUANG Ze'ai, LI Qingchuan, RAO Zhiqiang, ZHOU Ying. Construction of Type Ⅱ Heterojunction of Nb2O5/BiOCl for Enhanced Photocatalytic Carbon Dioxide Reduction. Materials Reports, 2021, 35(6): 6001-6007.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.20040256  或          http://www.mater-rep.com/CN/Y2021/V35/I6/6001
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