钛酸铋/氮化碳无机有机复合S型异质结纯水光催化产过氧化氢OA北大核心CSTPCD
Architecting Inorganic/Organic S-Scheme Heterojunction of Bi4Ti3O12 Coupling with g-C3N4 for Photocatalytic H2O2 Production from Pure Water
在纯水环境中人工光合成过氧化氢(H2O2)被认为是一种具有成本效益且环保的方法,因为过氧化氢不仅是一种常见的工业化学品,还是潜在的能源载体.然而,传统的单一人工光合成H2O2催化剂存在光吸收有限、团聚严重、难以重复使用等问题,这严重阻碍了其应用.在本研究中,我们采用了简单的静电纺丝辅助超声组装策略,在有机石墨相氮化碳(CN)纳米片表面上成功复合了无机钛酸铋纳米纤维(BTO),并形成了具有紧密接触界面的无机/有机BTOCN S型异质结光催化剂.经过光照,BTOCN复合材料的产H2O2速率达到1650 μmol∙g-1∙h-1,并且在纯水无牺牲剂条件下可以持续产生H2O2.这种增强的光催化活性归因于增强的光吸收、S型异质结的高电子-空穴分离效率和强氧化还原活性.原位辐照X射线光电子能谱测试和电子顺磁共振实验结果表明BTOCN异质结光催化剂中的电子迁移遵循梯型电荷转移路径.综上所述,本研究提供了一种简单的无机/有机S型异质结光催化剂的制备方法,该方法可以优化能带结构以促进光生载流子的分离,从而实现高效的人工光合成过氧化氢效率.
Hydrogen peroxide(H2O2)plays a significant role as an industrial chemical and potential energy carrier.However,common H2O2 photosynthesis catalysts face challenges such as limited solar spectrum absorption,severe agglomeration,and difficulty in reuse,hindering their widespread application.In this study,an inorganic/organic heterojunction photocatalyst comprising g-C3N4 nanosheets and Bi4Ti3O12 nanofibers is synthesized using electrospinning assisted self-assembly methods.The Bi4Ti3O12/g-C3N4 heterojunction exhibits significantly enhanced H2O2 yield of 1650 μmol∙g-1∙h-1 and efficient H2O2 photosynthesis directly from pure water.The improved performance is attributed to enhanced visible light absorption,charge separation efficiency,and boosting redox properties of photoinduced carriers in S-scheme heterojunctions.Additionally,the utilization of in situ X-ray photoelectron spectroscopy(ISXPS)enables the investigation of the S-scheme mechanism and dynamics of inorganic/organic Bi4Ti3O12/g-C3N4 heterojunctions.This research presents a novel approach for designing inorganic/organic heterojunction photocatalysts for solar-driven H2O2 production.
李可;刘创;李静萍;王国宏;王楷
湖北师范大学,污染物分析与资源化技术湖北省重点实验室,黄石市土壤污染防治重点实验室,湖北 黄石 435002湖北师范大学,污染物分析与资源化技术湖北省重点实验室,黄石市土壤污染防治重点实验室,湖北 黄石 435002湖北师范大学,污染物分析与资源化技术湖北省重点实验室,黄石市土壤污染防治重点实验室,湖北 黄石 435002湖北师范大学,污染物分析与资源化技术湖北省重点实验室,黄石市土壤污染防治重点实验室,湖北 黄石 435002湖北师范大学,污染物分析与资源化技术湖北省重点实验室,黄石市土壤污染防治重点实验室,湖北 黄石 435002||武汉纺织大学纺织印染清洁生产教育部工程研究中心,武汉 430073||School of Chemistry,Chemical Engineering and Biotechnology,Nanyang Technological University,62 Nanyang Drive,Singapore 637459,Singapore
化学
异质结光催化过氧化氢生成S型机理
HeterojunctionPhotocatalysisHydrogen peroxide productionS-scheme mechanism
《物理化学学报》 2024 (11)
27-28,2
This work was supported by the National Natural Science Foundation of China(22378104,52104254)and the Open Subject of Engineering Research Center for Clean Production of Textile Printing and Dyeing,Ministry of Education(2023GCZX008). 国家自然科学基金(22378104,52104254),纺织印染清洁生产教育部工程研究中心开放课题(2023GCZX008)资助项目
评论