物理化学学报 >> 2025, Vol. 41 >> Issue (8): 100093.doi: 10.1016/j.actphy.2025.100093

所属专题: 光催化中的S型异质结

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三聚氰胺泡沫支撑的S型硫铟锌镉/硫掺杂氮化碳异质结的绿色H2O2合成:协同界面电荷转移调控与局域光热效应

王伟康1, 吴亚栋1, 张建军2,*(), 孟凯3, 李金河1, 王乐乐1, 刘芹芹1,*()   

  1. 1 江苏大学, 材料科学与工程学院, 江苏 镇江 212013
    2 中国地质大学(武汉), 材料与化学学院, 太阳燃料实验室, 湖北 武汉 430078
    3 武汉理工大学, 材料复合新技术国家重点实验室, 湖北 武汉 430070
  • 收稿日期:2025-03-13 修回日期:2025-04-01 录用日期:2025-04-10 发布日期:2025-06-07
  • 通讯作者: Email: zhangjianjun@cug.edu.com; Tel.: +86-13921581597 (张建军)qqliu@ujs.edu.cn (刘芹芹)
  • 基金资助:
    国家自然科学基金(22472069); 国家自然科学基金(22102064); 国家自然科学基金(22302080); 纳米材料与技术安徽省重点实验室(202305a12020006)

Green H2O2 synthesis via melamine-foam supported S-scheme Cd0.5Zn0.5In2S4/S-doped carbon nitride heterojunction: synergistic interfacial charge transfer and local photothermal effect

Weikang Wang1, Yadong Wu1, Jianjun Zhang2,*(), Kai Meng3, Jinhe Li1, Lele Wang1, Qinqin Liu1,*()   

  1. 1 School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu Province, China
    2 Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430078, Hubei Province, China
    3 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, Hubei Province, China
  • Received:2025-03-13 Revised:2025-04-01 Accepted:2025-04-10 Published:2025-06-07
  • Contact: Email: zhangjianjun@cug.edu.com; Tel.: +86-13921581597 (Jianjun Zhang)qqliu@ujs.edu.cn (Qinqin Liu)
  • Supported by:
    the Natural Science Foundation of China(22472069); the Natural Science Foundation of China(22102064); the Natural Science Foundation of China(22302080); Anhui Key Laboratory of Nanomaterials and Nanotechnology, the Major Science and Technology Projects in Anhui Province(202305a12020006)

摘要:

绿色光催化合成过氧化氢(H2O2)是替代高能耗蒽醌工艺的理想途径,但其在无牺牲剂体系中受限于快速载流子复合与氧化还原能力不足。本研究报道了一种原位化学浴-水热法制备的三聚氰胺泡沫(MF)负载的硫掺杂氮化碳(SCN)/硫空位修饰硫铟锌镉(CZIS)S型异质结(CZIS/SCN/MF),用于无牺牲剂H2O2光合成。通过原位辐照X射线光电子能谱(XPS)、自由基捕获电子顺磁共振(EPR)、飞秒瞬态吸收光谱(fs-TA)及理论计算,证实了其S型电荷转移机制。具体而言,硫掺杂可调控氮化碳骨架的局域电荷分布,强化SCN/CZIS异质结界面内建电场;同时,CZIS中煅烧引入的硫空位作为光电子陷阱促进电荷分离,并保留光生空穴用于H2O氧化,从而实现无牺牲剂H2O2合成。结合MF三维多孔框架的光热效应,优化S掺杂浓度和SCN用量的CZIS/SCN/MF催化剂在纯水中H2O2产率达3.46 mmol·g−1·h−1,显著优于多数无牺牲剂体系。该研究为无牺牲剂光催化体系中的界面电荷协同调控与能量转换强化提供了新策略。

关键词: S型异质结, 过氧化氢合成, 光热效应, 三聚氰胺泡沫, 无牺牲试剂

Abstract:

Green photocatalytic synthesis of hydrogen peroxide (H2O2) represents a promising alternative to the energy-intensive anthraquinone process, yet it is hindered by rapid carrier recombination and insufficient redox capacity in sacrificial-agent-free systems. This work reports a melamine foam (MF)-supported sulfur (S)-doped carbon nitride (SCN)/S vacancy-modified Cd0.5Zn0.5In2S4 (CZIS) S-scheme heterojunction (CZIS/SCN/MF) via an in situ chemical bath-hydrothermal method for sacrificial-agent-free H2O2 photosynthesis. The S-scheme charge transfer mechanism was confirmed by in situ irradiated X-ray photoelectron spectroscopy, free-radical trapping electron paramagnetic resonance, femtosecond transient absorption spectra and theoretical calculations. Specifically, the sulfur doping could modulate the local charge distribution of the carbon nitride framework to reinforce the interfacial built-in electric field for the CZIS/SCN S-scheme heterojunction. Meanwhile, the calcination-induced S-vacancies in CZIS could serve as photoelectron traps, promoting charge separation, and reserving photoinduced holes for H2O oxidation, thereby achieving sacrificial-agent-free H2O2 synthesis. Coupled with the photothermal effect of MF's three-dimensional porous framework, the CZIS/SCN/MF catalyst with optimized S-doping density and SCN dosage delivers an H2O2 production rate of 3.46 mmol·g−1·h−1 in pure water, surpassing most of the sacrificial-agent-free systems. This study proposes a novel strategy for synergistic interfacial charge regulation and energy conversion enhancement in sacrificial-agent-free photocatalytic systems.

Key words: S-scheme heterojunction, H2O2 production, Photothermal effect, Melamine foam, Sacrificial-Agent-Free