物理化学学报2023，Vol.39Issue(6)：46-63,18.DOI:10.3866/PKU.WHXB202212010
S型异质结H2O2光催化剂的研究进展
Review of S-Scheme Heterojunction Photocatalyst for H2O2 Production
摘要
Abstract
Rapid industrialization throughout the 20th and 21st centuries has led to the excessive consumption of fossil fuels to satisfy global energy demands.The dominant use of these fuel sources is the main cause of the ever-increasing environmental issues that greatly threaten humanity.Therefore,the development of renewable energy sources is fundamental to solving environmental issues.Solar energy has received widespread attention over the past decades as a green and sustainable energy source.Solar radiation-induced photocatalytic processes on the surface of semiconductor materials are able to convert solar energy into other energy sources for storage and further applications.However,the preparation of highly efficient and stable photocatalysts remains challenging.Recently,a new step-scheme(S-scheme)carrier migration mechanism was reported that solves the drawbacks of carrier migration in conventional heterojunction photocatalysts.The S-scheme heterojunction not only effectively solves the carrier migration problem and achieves fast separation but also preserves the powerful redox abilities and improves the catalytic performance of the photocatalytic system.To date,various S-scheme heterojunctions have been developed and employed to convert solar energy into useful chemical fuels to decrease the reliance on fossil fuels.Furthermore,these systems can also be used to degrade pollutants and reduce the harmful impact on the environment associated with the consumption of fossil fuels,including H2 evolution,pollutant degradation,and the reduction of CO2.H2O2 has been used as an effective,multipurpose,and green oxidizing agent in many applications including pollutant purification,medical disinfection,and chemical synthesis.It has also been used as a high-density energy carrier for fuel cells,with only water and oxygen produced as by-products.Photocatalytic technology provides a low-cost,environmentally friendly,and safe way to produce H2O2,requiring only solar energy,H2O,and O2 gas as raw materials.This paper reviews new S-scheme heterojunction designs for photocatalytic H2O2 production,including g-C3N4-,sulfide-,TiO2-,and ZnO-based S-scheme heterojunctions.The main principles of photocatalytic H2O2 production and the formation mechanism of the S-scheme heterojunction are also discussed.In addition,effective advanced characterization methods for S-scheme heterojunctions have been analyzed.Finally,the challenges that need to be addressed and the direction of future research are identified to provide new methods for the development of high-performance photocatalysts for H2O2 production.关键词
光催化/S型异质结/H2O2制备/电荷转移Key words
Photocatalysis/S-scheme heterojunction/H2O2 generation/Charge transfer分类
化学引用本文复制引用
张珂瑜,李云锋,袁仕丹,张洛红,王倩..S型异质结H2O2光催化剂的研究进展[J].物理化学学报,2023,39(6):46-63,18.基金项目
This work is supported by the National Natural Science Foundation of China(22008185,22008187),Shaanxi Provincial Key Research and Development Program,China(2022GY-166 （22008185,22008187）
2022GY-161),Scientific Research Program Funded by Shaanxi Provincial Education Department,China(22JK0406),and Training Program of Innovation and Entrepreneurship for Undergraduates,China(S202210709063).国家自然科学基金(22008185,22008187),陕西省科技厅重点研发计划项目(2022GY-166,2022GY-161),陕西省教育厅自然专项(22JK0406),西安工程大学大学生创新创业训练计划项目(S202210709063) （22JK0406）
