Acta Phys. -Chim. Sin. ›› 2024, Vol. 40 ›› Issue (11): 2407002.doi: 10.3866/PKU.WHXB202407002

Special Issue: Solar fuel preparation

• ARTICLE • Previous Articles     Next Articles

Highly Efficient InOOH/ZnIn2S4 Hollow Sphere S-Scheme Heterojunction with 0D/2D Interface for Enhancing Photocatalytic CO2 Conversion

Jiaxing Cai1, Wendi Xu3, Haoqiang Chi4, Qian Liu1, Wa Gao1,*(), Li Shi3,*(), Jingxiang Low1,5,*(), Zhigang Zou4, Yong Zhou2,4,*()   

  1. 1 School of Physical Science and Technology, Tiangong University, Tianjin 300387, China
    2 School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, Anhui Province, China
    3 State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing 210023, China
    4 School of Physics, Jiangsu Key Laboratory of Nanotechnology, Eco-materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
    5 Multidisciplinary Platform of Advanced Engineering, Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Bandar Sunway 47500, Selangor, Malaysia
  • Received:2024-07-02 Revised:2024-08-05 Accepted:2024-08-05 Published:2024-10-14
  • Contact: Email: gaowa@tiangong.edu.cn (Wa Gao)iamlshi@njupt.edu.cn (Li Shi)jxlow@tiangong.edu.cn (Jingxiang Low)zhouyong1999@nju.edu.cn (Yong Zhou)
  • Supported by:
    the National Key R & D Program of China(2022YFE0126500); the National Key R & D Program of China(2018YFE0208500); the National Natural Science Foundation of China(21972065); the National Natural Science Foundation of China(22203046); the National Natural Science Foundation of China(22202152); the Natural Science Foundation of Jiangsu Province(BK20220006); the Hefei National Laboratory for Physical Sciences at the Microscale(KF2020006); the Program for Guangdong Introducing Innovative and Entrepreneurial Team(2019ZL08L101); the Chinese University Development Fund(UDF01001159); the Project of State Key Laboratory of Organic Electronics and Information Displays, Nanjing University of Posts and Telecommunications(GZR2023010003); Natural Science Research Start-up Foundation of Recruiting Talents of Nanjing University of Posts and Telecommunications(NY221128)

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.

Key words: Photocatalytic CO2 conversion, S-scheme heterojunction, ZnIn2S4, Hollow sphere, Contact interface