紫外光辐照构建含氧空位Bi/(BiO)_(2)CO_(3)增强光催化还原CO_(2)  

Constructed Oxygen Vacancy in Bi/(BiO)_(2)CO_(3)by UV Irradiation to Enhance Photocatalytic CO_(2)Reduction

作　　者：何欣阳 孙志飞 邓良广 郭靖 崔文昊 吕英 HE Xin-yang;SUN Zhi-fei;DENG Liang-guang;GUO Jing;CUI Wen-hao;LV Ying(College of Materials Science and Engineering,Xi′an Petroleum University,Xi′an 710065,China;Eleventh Oil Production Plant,PetroChina Changqing Oilfield Branch,Qingyang 745099,China;Xi′an Changqing Tongxin Petroleum Technology Co.,Ltd.,Xi′an 710000,China)

机构地区：[1]西安石油大学材料科学与工程学院,陕西西安710065 [2]中国石油天然气股份有限公司长庆油田分公司第十一采油厂,甘肃庆阳745099 [3]西安长庆同欣石油科技有限公司,陕西西安710000

出　　处：《化学试剂》2025年第4期63-71,共9页Chemical Reagents

基　　金：西安石油大学研究生创新与实践能力培养计划资助项目(YCS23212023)。

摘　　要：以BiOCOOH为前驱体,使用绿色、温和的紫外光诱导法制备具有氧空位的Bi/(BiO)_(2)CO_(3)。对紫外光辐照不同时间的样品进行光催化还原CO_(2)性能测试,光催化活性高度依赖于制备过程的光照时间。在所制备的样品中,光辐照时间为50 min时的样品(B-50)表现出最高的光催化活性,其在CO_(2)还原6 h后的CO累计产量高达88.84μmol/g,为BiOCOOH的4倍。与此同时,CO选择性为100%。通过电化学测试表明,光催化性能的提高可归因于氧空位缺陷能级和Bi纳米颗粒的等离子体共振效应(SPR)的协同作用,调节了能带结构、提高了可见光的吸收范围、促进了光生载流子的分离。这一领域的研究不仅提供了一种简便、低成本的方法同时将氧空位和Bi纳米颗粒引入材料中,而且证实了紫外光辐照是调节材料光催化性能的有效方法,为开发高效光催化剂和还原CO_(2)提供了见解。Bi/(BiO)_(2)CO_(3)with oxygen vacancies was prepared using a green and mild UV-induced method by utilizing BiOCOOH as a precursor.Samples irradiated with UV light for different time were tested for photocatalytic reduction of CO_(2),and the photocatalytic activity was highly dependent on the time of light irradiation of the preparation process.Among the prepared samples,the sample with a light irradiation time of 50 min(B-50)exhibited the highest photocatalytic activity,with a cumulative CO yield as high as 88.84μmol/g after 6 h of CO_(2)reduction,which is four times that of BiOCOOH.Meanwhile,the CO selectivity was 100%.The improved photocatalytic performance can be attributed to the synergistic effect of the oxygen vacancy defect energy levels and the plasmon resonance effect(SPR)of the Bi nanoparticles,which modulated the energy band structure,improved the absorption range of the visible light,and facilitated the separation of photogenerated carriers,as shown by electrochemical tests.Research in this area not only provides a facile and low-cost method to simultaneously introduce oxygen vacancies and Bi nanoparticles into materials,but also confirms that UV irradiation is an effective method to modulate the photocatalytic properties of materials,providing insights into the development of highly efficient photocatalysts and the reduction of CO_(2).

关 键 词：BiOCOOH 紫外光辐照 氧空位 光催化还原CO_(2) Bi纳米颗粒 

分 类 号：O64[理学—物理化学]