Constructing Defect-Mediated CdS/g-C3N4 by an In-situ interlocking strategy for Cocatalyst-free photocatalytic H2 production
Constructing Defect-Mediated CdS/g-C3N4 by an In-situ interlocking strategy for Cocatalyst-free photocatalytic H2 production
复制标题
通过原位联锁策略构建缺陷介导的 CdS/g-C3N4 用于无助催化剂光催化制氢
DOI：
10.1016/j.apsusc.2022.153875
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发表时间：
2022-10-15
影响因子：
6.7
通讯作者：
van Ree, Teunis
中科院分区：
文献类型：
--
作者：
Wang, Jing;Pan, Runhui;van Ree, Teunis
异质结光催化剂的构建是实现高效光催化制氢的一种新兴策略，而构建方法对于改善界面电荷载流子的分离和转移至关重要。异质结中的弱耦合界面导致较低的产氢活性和稳定性。本文提出了一种基于原位互锁反应的简单方法来解决界面接触问题。荔枝状CdS通过互锁过程锚定在g-C3 N4（CN）的缺陷处，由于表面张力的作用，一些小的颈缩CdS颗粒聚集在接触角上，进一步扩展了接触界面。CdS/g-C3 N4（CdS/CN）具有独特的强耦合界面，由于其互锁结合、颈缩效应和异质结等综合优势，可以有效地改善界面分离和光生载流子的转移动力学。在可见光照射下，所制备的CdS/CN光催化剂的产氢速率是纯CdS的36倍以上。本工作提供了一个通过简单的策略实现缺陷介导的异质结光催化剂合成的实际研究案例。
The construction of heterojunction photocatalyst is an emerging strategy for realizing efficient photocatalytic hydrogen production, and the methodology of construction is critical for improving the interfacial charge carriers separation and transfer. A weakly coupling interface in a heterojunction leads to lower hydrogen production activity and stability. Herein, a facile strategy based on an in-situ interlocking reaction is developed to solve the interfacial contact issue. Litchi-like CdS is anchored at the defects of the g-C3N4 (CN) by an interlocking process, and the contact interface is further extended by some small necking CdS particles that assembled on the contact corner because of the surface tension. The as-formed CdS/g-C3N4 (CdS/CN) has a unique and strongly coupling interface, which can effectively improve interfacial separation and transfer kinetics of photogenerated charge carriers due to the synthetic advantages of interlocking binding, necking effect, and heterojunction. Impressively, the as-prepared CdS/CN photocatalyst yields over 36 folds of cocatalyst-free hydrogen generation rate than the pure CdS under the visible light irradiation. This work presents a case of practical study to realize the synthesis of defect-mediated heterojunction photocatalysts by a facile strategy.