物理化学学报 >> 2025, Vol. 41 >> Issue (12): 100155.doi: 10.1016/j.actphy.2025.100155

论文 上一篇    下一篇

增强型双功能S型CoWO4/CdIn2S4异质结用于H2生成和甲醛降解

陈成鑫1, 石洪飞1,*(), 蔡晓燕2, 毛梁2,3,*(), 陈哲1,*()   

  1. 1 吉林化工大学石油化工学院, 吉林 吉林 132022
    2 中国矿业大学材料科学与物理学院, 江苏 徐州 221116
    3 德爱威杭州有限公司, 浙江 杭州 311200
  • 收稿日期:2025-07-11 修回日期:2025-08-06 录用日期:2025-08-09 发布日期:2025-10-23
  • 通讯作者: Email: shihf813@nenu.edu.cn (石洪飞)maoliang@cumt.edu.cn (毛梁)chenz@jlict.edu.cn (陈哲)
  • 基金资助:
    国家自然科学基金(22309061); 国家自然科学基金(22209203); 国家自然科学基金(22309204); 国家自然科学基金(22278172); 吉林省教育厅项目(JJKH20240305KJ); 吉林省科学技术厅项目(YDZJ202401372ZYTS)

Enhanced bifunctional photocatalytic performances for H2 evolution and HCHO elimination with an S-scheme CoWO4/CdIn2S4 heterojunction

Chengxin Chen1, Hongfei Shi1,*(), Xiaoyan Cai2, Liang Mao2,3,*(), Zhe Chen1,*()   

  1. 1 Institute of Petrochemical Technology, Jilin University of Chemical Technology, Jilin, 132022, Jilin Province, China
    2 School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, Jiangsu Province, China
    3 Caparol Hangzhou Ltd., Hangzhou, 311200, Zhejiang Province, China
  • Received:2025-07-11 Revised:2025-08-06 Accepted:2025-08-09 Published:2025-10-23
  • Contact: Email: shihf813@nenu.edu.cn (Hongfei Shi)maoliang@cumt.edu.cn (Liang Mao)chenz@jlict.edu.cn (Zhe Chen)
  • Supported by:
    the National Natural Science Foundation of China(22309061); the National Natural Science Foundation of China(22209203); the National Natural Science Foundation of China(22309204); the National Natural Science Foundation of China(22278172); the Education Department project of Jilin Province(JJKH20240305KJ); the Science and Technology Department project of Jilin Province(YDZJ202401372ZYTS)

RichHTML

24

PDF

391

赞

补充材料

1

摘要：

设计与构建兼具高效光生载流子分离能力和强氧化/还原能力的双功能S型异质结光催化剂，在能源转换与环境净化的光催化应用中具有重要实践价值。本研究通过静电纺丝与水热法系统设计合成了一系列新型x% CoWO4/CdIn2S4复合材料(x%代表CWO与CIS的质量比；x = 10, 20, 30, 40, 50)。通过可见光下甲醛降解与产氢实验评估其光催化性能。最优的30% CWO/CIS异质结展现出865.14 μmol g−1 h−1的卓越产氢性能(420 nm处表观量子效率AQE = 3.6%)，并在1 h内实现69%的甲醛去除率。基于原位红外光谱技术解析了甲醛降解路径。优异的催化性能主要归因于可见光吸收增强、活性位点数量增加及S型异质结的构建。通过原位XPS、电子自旋共振测试、自由基捕获实验及密度泛函理论(DFT)计算，证实了CWO/CIS体系的S型电荷转移机制。该研究为系统性开发兼具气体污染物去除与产氢功能的双功能S型异质结提供了重要见解。

关键词: CoWO4, CdIn2S4, 产氢, 甲醛降解, DFT计算

Abstract:

Designing and establishing dual-functional S-scheme heterojunction photocatalysts with efficient separation of photoproduced carriers and intense oxidation/reduction capabilities holds immense practical value for their photocatalytic application in energy conversion and environmental purification. Herein, a novel series of x% CoWO4/CdIn2S4 (x% reflects the weight ratio of CWO to CIS; x = 10, 20, 30, 40 and 50) composites have been systematically designed and synthesized via electrospinning technique and hydrothermal methods. Their photocatalytic properties were assessed through HCHO removal and H2 generation under visible light. As anticipated, the optimized 30% CWO/CIS heterojunction presented an outstanding H2 generation performance of 865.14 μmol g−1 h−1 with AQE = 3.6% at λ = 420 nm, and achieved a 69% removal percentage for HCHO within 1 h. Meanwhile, the pathway of HCHO degradation was presented based on in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) technique. The great catalytic performance was primarily ascribed to the enhancement in the visible-light absorption, number of active sites, and the construction of S-scheme heterojunction. Furthermore, the S-scheme charge transfer mechanism for the CWO/CIS catalyst system has been confirmed by in situ X-ray photoelectron spectroscopy (in situ XPS), electron spin resonance data, radical capturing experiments, and density functional theory (DFT) calculations. This research contributes valuable understanding for the systematic design and development of bifunctional S-scheme heterojunctions for gaseous pollutants removal and H2 production.

Key words: CoWO4, CdIn2S4, H2 production, HCHO degradation, DFT calculations