Chinese Journal of Catalysis ›› 2025, Vol. 78: 75-99.DOI: 10.1016/S1872-2067(25)64825-X

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Recent advances in graded nanomaterial-based photocatalysts: Principles, designs, and applications

Jiale Lva, Hailiang Chua,*(), Chunfeng Shaob,*(), Lixian Suna, Graham Dawsonc, Kai Daib,*()   

  1. aGuangxi Key Laboratory of Information Materials, Guangxi University Engineering Research Center of Hydrogen/Heat/Electricity-Related Energy Materials and Sensors, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, Guangxi, China
    bKey Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, Huaibei Normal University, Huaibei 235000, Anhui, China
    cDepartment of Chemistry and Materials Science, Xi’an Jiaotong Liverpool University, Suzhou 215123, Jiangsu, China
  • Received:2025-05-26 Accepted:2025-06-20 Online:2025-11-18 Published:2025-10-14
  • Contact: *E-mail: daikai940@chnu.edu.cn (K. Dai), chuhailiang@guet.edu.cn (H. Chu), shaocf@chnu.edu.cn (C. Shao).
  • About author:Hailiang Chu (School of Materials Science and Engineering, Guilin University of Electronic Technology) received his Ph.D. degree from Dalian Institute of Chemical Physics, Chinese Academy of Sciences in 2008. His research interests focus on the synthesis and application of high-performance electrode materials for secondary batteries and supercapacitors and high-capacity hydrogen storage materials, including alloys, metal borohydrides, metal-N-H materials, ammonia borane, and their derivatives.
    Chunfeng Shao (Huaibei Normal University) received her Ph. D. from South China University of Technology in 2021. Her research interest is focused on the rational design and controllable synthesis of atomic-scale materials for applications in energy storage and catalysis. She has published more than 28 peer-reviewed papers, among which 20 are as the first author or corresponding author.
    Kai Dai (Huaibei Normal University) was invited as a member of Youth or Editorial Board of Chinese Journal of Catalysis, Composite Functional Materials, Renewable and Sustainable Energy, Chinese Journal of Structural Chemistry and Acta Physico-Chimica Sinica. Prof. Kai Dai received his B.A. degree from Anhui University (China) in 2002, and Ph.D. degree from Shanghai University (China) in 2007. He worked in Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences at 2007, and then in Huaibei Normal University at 2010. He is Expert of special allowance from Anhui Provincial Government (2024), Distinguished Young Scholars Recipients of Natural Science Foundation of Anhui Province (2018) and head of Anhui Provincial Excellent research and innovation team in universities (2022) and Anhui Provincial Teaching Team (2019). He has also been invited by Xi’an Jiaotong Liverpool University to be a visiting Professor and PhD co-supervisor since 2022. His research interests mainly focus on semiconductor nanomaterials for solar energy conversion. He has published more than 170 peer-reviewed papers.
  • Supported by:
    National Natural Science Foundation of China(22278169);Guangxi Science and Technology Program(AD25069070);Excellent Scientific Research and Innovation Team of Education Department of Anhui Province(2022AH010028);Anhui Provincial Quality Engineering Project(2022sx134)

Abstract:

The rise in global energy demand and environmental pollution highlights the importance of developing efficient and stable photocatalytic materials to address the energy crisis and environmental issues. Graded nanomaterials exhibit significant promise for photocatalysis due to their unique structural advantages, including multi-scale pores, high specific surface area, and optimized electron transport pathways. This review systematically examines the design principles and synthesis methods for hierarchical nanomaterials and their photocatalytic performance. Through modulation of porous structures, hierarchical heterojunctions, and core-shell configurations, graded nanomaterials notably improve light absorption efficiency, carrier separation, and surface reaction activity of photocatalysts. Strategies such as S-scheme heterojunctions and interface engineering further enhance the performance of photocatalysts for CO2 reduction, hydrogen production, and pollutant degradation. In situ characterization techniques offer dynamic insights into the photocatalytic mechanism. This study elucidates how hierarchical structures influence photocatalytic performance, discusses their potential applications in environmental treatment and clean energy, and proposes directions for future design and optimization of photocatalytic materials.

Key words: Hierarchical nanomaterials, Photocatalysis, S-scheme heterojunction, In-situ characterization, Charge separation