具有0D/2D界面的InOOH/ZnIn2S4空心球S型异质结用于增强光催化CO2转化性能
Highly Efficient InOOH/ZnIn2S4 Hollow Sphere S-Scheme Heterojunction with 0D/2D Interface for Enhancing Photocatalytic CO2 Conversion
蔡佳星 1徐文迪 2迟浩强 3刘倩 1高娃 1史丽 2刘敬祥 4邹志刚 3周勇5
作者信息
- 1. 天津工业大学物理科学与技术学院,天津 300387
- 2. 南京邮电大学有机电子与信息显示国家重点实验室,先进材料研究所(IAM),南京 210023
- 3. 南京大学物理学院,江苏省纳米技术重点实验室,生态材料与可再生能源研究中心,固态微结构国家实验室,先进微结构协同创新中心,南京 210093
- 4. 天津工业大学物理科学与技术学院,天津 300387;Multidisciplinary Platform of Advanced Engineering,Chemical Engineering Discipline,School of Engineering,Monash University Malaysia,Bandar Sunway 47500,Selangor,Malaysia
- 5. 安徽工业大学化学与环境工程学院,安徽 芜湖 241000;南京大学物理学院,江苏省纳米技术重点实验室,生态材料与可再生能源研究中心,固态微结构国家实验室,先进微结构协同创新中心,南京 210093
- 折叠
摘要
S型异质结光催化剂因其能够同时促进光生载流子的分离,并优化光催化剂的还原和氧化能力,而被广泛应用于光催化CO2转化中.尽管S型异质结具有巨大的潜力,但其光催化CO2转化性能仍然有限,这主要是由于其界面光生载流子迁移缓慢和光利用效率差.本文报道了一种具有0D/2D接触界面的InOOH/ZnIn2S4空心球S型异质结,以提高光催化CO2转化性能.具体来说,空心球结构可以允许入射光在光催化剂内进行多重反射,以增强光利用效率.此外,0D/2D接触界面可以促进光生载流子在InOOH/ZnIn2S4空心球S型异质结上的迁移速率.结合原位光照X射线光电子能谱表征和自由基捕获实验,确认了InOOH和ZnIn2S4上光生空穴和电子的空间分离,有利于高效利用光生载流子进行光催化CO2转化.因此,优化后的InOOH/ZnIn2S4展示了比原始ZnIn2S4高出25.8倍的光催化CO2转化性能.本工作展示了一种简单而有效的策略,用于提高S型异质结的界面光电荷载流子迁移和光利用效率.
Abstract
S-scheme heterojunction system represents a highly efficient strategy for photocatalytic applications as it can simultaneously facilitate photogenerated charge carrier separation and enhance the reduction-oxidation potentials of the photocatalyst.Despite its gigantic potential,the photocatalytic CO2 conversion efficiency of the S-scheme heterojunction remains limited mainly attributed to the sluggish interfacial charge carrier migration and poor light utilization efficiency.Herein,we prepare an InOOH/ZnIn2S4 hollow sphere S-scheme heterojunction with 0D/2D contact interface for enhancing photocatalytic CO2 conversion performance.Specifically,the hollow sphere morphology can cause the multireflection of incident light within the photocatalyst leading to enhanced light absorption of the photocatalyst.In addition,the 0D/2D contact interface can facilitate the photogenerated charge carrier migration transfer over the InOOH/ZnIn2S4 S-scheme heterojunction.Furthermore,combining in situ irradiated X-ray photoelectron spectroscopy(ISI-XPS)characterization and radicals trapping test,it is affirmed the accumulation of photogenerated holes and electrons respectively on InOOH and ZnIn2S4,which is beneficial for the effective utilization of photogenerated charge carriers.As a result,the photocatalytic CO2 conversion performance of the optimized InOOH/ZnIn2S4 is ca.25.8 times higher than that of pristine ZnIn2S4.Our reported results demonstrate a facile yet effective strategy for enhancing the interfacial photogenerated charge carrier migration and light utilization efficiency of S-scheme heterojunction.
关键词
光催化CO2转化/S型异质结/ZnIn2S4/空心球/接触界面Key words
Photocatalytic CO2 conversion/S-scheme heterojunction/ZnIn2S4/Hollow sphere/Contact interface引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据