Recent advances on CDs/g-C3N4 heterostructure: Construction and photocatalytic application

doi:10.16085/j.issn.1000-6613.2024-1359

Abstract

Abstract:

The construction of carbon dots (CDs) and graphitic carbon nitride (g-C₃N₄) heterojunction can effectively enhance the light absorption range of g-C₃N₄, increase the efficiency of photoelectron-hole separation, and thus improve the photocatalytic performance of g-C₃N₄. This review summarizes the latest research progress of the CDs/g-C₃N₄ heterojunction, including the types of semiconductor heterojunctions, charge transfer mechanisms, and photocatalytic action mechanisms. Secondly, different construction strategies of the CDs/g-C₃N₄ heterojunction were compared, and the influences of photogenerated charge carrier separation efficiency, light capture range, and bandgap on the photocatalytic performance were discussed, and the applications of the CDs/g-C₃N₄ heterojunction in photocatalytic hydrogen production, CO₂ reduction, and pollutant degradation were introduced. Finally, the problems in the structure design and reaction mechanism analysis of CDs/g-C₃N₄ photocatalysts were pointed out, and the broad prospects of CDs/g-C₃N₄ photocatalysts in solar energy conversion, environmental governance, and biomedicine were given.

Key words: photochemistry, catalyst, heterojunction, hydrogen production, CO₂ capture, degradation

摘要：

碳点（CDs）与石墨相氮化碳（g-C₃N₄）异质结的构建，可以有效提高g-C₃N₄的光吸收范围，增强光生电子-空穴的分离效率，从而提高g-C₃N₄的光催化性能。本文综述了CDs/g-C₃N₄异质结的最新研究进展，首先，归纳了半导体异质结的类型、电荷转移机制及其光催化作用机理；其次，对比总结了CDs/g-C₃N₄异质结的构筑策略，深入探讨了CDs/g-C₃N₄异质结的光生载流子分离效率、光捕获范围以及带隙对光催化性能的影响，分析了CDs/g-C₃N₄异质结在光催化制氢、还原CO₂以及降解污染物方面的应用；最后，总结了目前CDs/g-C₃N₄异质结在结构设计及反应机制存在的问题，展望了CDs/g-C₃N₄光催化剂未来在太阳能转化、环境治理以及生物医药方面的广阔前景，为CDs/g-C₃N₄异质结的构建及在光催化领域的研究提供新思路。

关键词: 光化学, 催化剂, 异质结, 制氢, 二氧化碳捕集, 降解

CLC Number:

TQ032.4

ZHANG Yating, MA Xiaomei, LI Keke, JIA Jia, CHEN Meng, DAI Liang, GAO Xitong. Recent advances on CDs/g-C₃N₄ heterostructure: Construction and photocatalytic application[J]. Chemical Industry and Engineering Progress, 2025, 44(10): 5751-5763.

张亚婷, 马小梅, 李可可, 贾嘉, 陈萌, 代亮, 高希桐. CDs/g-C₃N₄异质结构筑及其在光催化领域的应用[J]. 化工进展, 2025, 44(10): 5751-5763.

Figures/Tables 11

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合成方法	优点	缺点
机械混合法	碳点结构完整	碳点容易脱落、分布不均匀
超声波辅助法	碳点分布均匀、负载率可调	石墨相氮化碳形貌发生变化
静电自组装法	碳点结构完整、分布均匀	适用于电荷相反的碳点和石墨相氮化碳
煅烧法	碳点与石墨相氮化碳结合紧密	碳点电子和光学性质减弱
水热法	碳点结构完整且与石墨相氮化碳结合紧密	需要高压高温条件

合成方法	优点	缺点
机械混合法	碳点结构完整	碳点容易脱落、分布不均匀
超声波辅助法	碳点分布均匀、负载率可调	石墨相氮化碳形貌发生变化
静电自组装法	碳点结构完整、分布均匀	适用于电荷相反的碳点和石墨相氮化碳
煅烧法	碳点与石墨相氮化碳结合紧密	碳点电子和光学性质减弱
水热法	碳点结构完整且与石墨相氮化碳结合紧密	需要高压高温条件

Recent advances on CDs/g-C₃N₄ heterostructure: Construction and photocatalytic application

CDs/g-C₃N₄异质结构筑及其在光催化领域的应用

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