物理化学学报 >> 2026, Vol. 42 >> Issue (10): 100350.doi: 10.1016/j.actphy.2026.100350

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手性调控CdS/Co掺杂Ti3C2 MXene肖特基异质结微塑料光重整制取氢气与丙酮酸

李和玉1,†, 李玲娇2,†, 王海余2,*(), 刘彬3, 陈莲芬4, 靳治良1,*()   

  1. 1 北方民族大学化学与化学工程学院, 国家民委化工技术基础重点实验室, 宁夏太阳能化学转化技术重点实验室, 宁夏 银川 750021
    2 榆林大学化学与化工学院, 陕西 榆林 719000
    3 韶关学院化学与土木工程学院, 广东 韶关 512005
    4 肇庆学院环境与化学工程学院, 广东 肇庆 526061
  • 收稿日期:2026-05-10 修回日期:2026-06-09 录用日期:2026-06-16 发布日期:2026-09-10
  • 通讯作者: Email: whyu@yulinu.edu.cn (王海余)zl-jin@nun.edu.cn (靳治良)
  • 作者简介:

    †这些作者对本工作做出同等贡献

Chirality regulated CdS/Co-doped Ti3C2 MXene Schottky heterojunction for microplastic photoreforming to hydrogen and pyruvic acid

Heyu Li1, Lingjiao Li2, Haiyu Wang2,*(), Bin Liu3, Lianfen Chen4, Zhiliang Jin1,*()   

  1. 1 School of Chemistry and Chemical Engineering, Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan 750021, Ningxia Hui Autonomous Region, China
    2 School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, Shaanxi Province, China
    3 School of Chemistry and Civil Engineering, Shaoguan University, Shaoguan 512005, Guangdong Province, China
    4 School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, Guangdong Province, China
  • Received:2026-05-10 Revised:2026-06-09 Accepted:2026-06-16 Published:2026-09-10
  • Contact: Email: whyu@yulinu.edu.cn (Haiyu Wang)zl-jin@nun.edu.cn (Zhiliang Jin)

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摘要：

手性光催化剂在光催化析氢领域展现出巨大潜力。然而，手性调控的硫化镉(CCdS)仍面临光生电荷分离不足的问题，这限制了其实际应用与进一步发展。本文通过简单物理混合法，构建了由CCdS与Co掺杂Ti3C2 (CTC)组成的新型肖特基异质结光催化剂(CCdS/CTC)。该光催化剂在5 h内可从聚乳酸(PLA)微塑料中实现21937 μmol g−1的产氢量，同时将PLA转化为丙酮酸(PA)小分子。X射线光电子能谱(XPS)、原位X射线光电子能谱(原位XPS)及密度泛函理论(DFT)计算证实了CCdS与CTC接触界面的电荷转移。光电化学测试表明，CCdS的手性调控与所构建的异质结协同作用，有效促进了光生电荷的分离与传输。CCdS/CTC界面形成的肖特基异质结进一步提升了CCdS的光生载流子分离效率。手性调控与元素掺杂的协同效应显著抑制了光生电荷复合。本研究提出了一种将废塑料转化为氢燃料的有效策略，为可持续光催化剂的理性设计提供了参考，在环境修复与可再生能源生产领域具有应用潜力。

关键词: 手性调控, CdS, MXene, 肖特基异质结, 微塑料制氢

Abstract:

Chiral photocatalysts show significant promise for photocatalytic hydrogen evolution. However, chirality-regulated cadmium sulfide (CCdS) continues to suffer from insufficient photogenerated charge separation, which restricts its practical application and further advancement. Herein, we construct a novel Schottky heterojunction photocatalyst (CCdS/CTC) composed of CCdS and Co-doped Ti3C2 (CTC) via a simple physical mixing method. Notably, the photocatalyst achieves a hydrogen yield of 21937 μmol g−1 from polylactic acid (PLA) microplastics within 5 h, accompanied by simultaneous conversion of PLA into pyruvic acid (PA) small molecules. X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations demonstrate the interfacial charge transfer between CCdS and CTC upon contact, and in situ XPS confirms the charge transfer under illumination. Photoelectrochemical measurements demonstrate that the chirality regulation of CCdS works synergistically with the constructed heterojunction to effectively promote photogenerated charge separation and transport. The Schottky heterojunction formed at the CCdS/CTC interface further enhances the photogenerated carrier separation efficiency of CCdS. The synergy between chirality regulation and elemental doping markedly suppresses photogenerated charge recombination and optimizes surface reaction kinetics. This work presents a promising approach for converting plastic waste into H2 fuel, offering critical insights into the rational design of sustainable photocatalysts for environmental remediation and renewable energy production.

Key words: Chiral control, CdS, MXene, Schottky heterojunction, Microplastic hydrogen production