Статья

Flash Joule Heating Synthesis of Nitrogen‐Rich Defective G‐C₃N₄ for Highly Efficient Photocatalytic Hydrogen Evolution

Jiawei XiaoState Key Laboratory of Precision Electronic Manufacturing Technology and Equipment School of Electromechanical Engineering Guangdong University of Technology Guangzhou 510006 ChinaYun ChenState Key Laboratory of Precision Electronic Manufacturing Technology and Equipment School of Electromechanical Engineering Guangdong University of Technology Guangzhou 510006 ChinaChuhao CaiState Key Laboratory of Precision Electronic Manufacturing Technology and Equipment School of Electromechanical Engineering Guangdong University of Technology Guangzhou 510006 ChinaShengbao LaiLiang ChengState Key Laboratory of Precision Electronic Manufacturing Technology and Equipment School of Electromechanical Engineering Guangdong University of Technology Guangzhou 510006 ChinaJunjie ZhangState Key Laboratory of Precision Electronic Manufacturing Technology and Equipment School of Electromechanical Engineering Guangdong University of Technology Guangzhou 510006 ChinaWenxuan ZhuState Key Laboratory of Precision Electronic Manufacturing Technology and Equipment School of Electromechanical Engineering Guangdong University of Technology Guangzhou 510006 ChinaYuanhui GuoState Key Laboratory of Precision Electronic Manufacturing Technology and Equipment School of Electromechanical Engineering Guangdong University of Technology Guangzhou 510006 ChinaMaoxiang HouState Key Laboratory of Precision Electronic Manufacturing Technology and Equipment School of Electromechanical Engineering Guangdong University of Technology Guangzhou 510006 ChinaLi MaState Key Laboratory of Precision Electronic Manufacturing Technology and Equipment School of Electromechanical Engineering Guangdong University of Technology Guangzhou 510006 ChinaWanqun ChenSuzhou Maxwell Technologies Co. No. 228, Ludang Road, Wujiang District Suzhou Jiangsu 215200 ChinaXin ChenState Key Laboratory of Precision Electronic Manufacturing Technology and Equipment School of Electromechanical Engineering Guangdong University of Technology Guangzhou 510006 ChinaC.P. WongSchool of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA

2025en

ABI

Аннотация

Seeking renewable energy solutions that are sustainable and environmentally friendly is a critical contemporary research imperative. This paper presents a flash Joule heating approach to prepare high-performance nitrogen-rich defective graphitic carbon nitride (g-C₃N₄) for hydrogen production by photocatalytic water splitting at ultralow cost. By leveraging the rapid heating and cooling capabilities of flash Joule heating, and using melamine as the sole precursor, defects are introduced and precisely regulated while preserving the structural integrity of as-synthesized prepared g-C₃N₄. By tuning the processing parameters, the band structure of g-C₃N₄ can also be optimized, which can significantly suppress electron-hole recombination and substantially enhance its photocatalytic hydrogen evolution from splitting water. As a result, a hydrogen evolution rate of 16936.5 µmol h⁻¹ g⁻¹ for Pt/g-C₃N₄ is achieved, which is comparable to the leading benchmarks in the field. Through a life cycle assessment (LCA) and a cradle-to-gate techno-economic assessment (TEA), this method reduces costs to 1/12, energy consumption to 1/23, and CO₂ emissions to less than 1/8 of those associated with the thermal polymerization approach under equivalent conditions. These results underscore the exceptional advantages of the developed method in cost-effectiveness and environmental sustainability, offering a robust scientific foundation for the industrial-scale production of g-C₃N₄-based photocatalysts.

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Идентификаторы

DOI: 10.1002/smll.202503335

Цитирования и источники

Цитирований: 4Использованных источников: 0

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