Enhanced photocatalytic hydrogen production activity of Janus Cu1.94S-ZnS spherical nanoheterostructures
Enhanced photocatalytic hydrogen production activity of Janus Cu1.94S-ZnS spherical nanoheterostructures
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Janus Cu1.94S-ZnS球形纳米异质结构的光催化产氢活性增强
DOI：
10.1016/j.jcis.2021.05.073
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发表时间：
2021-05-26
影响因子：
9.9
通讯作者：
Liu, Yong
中科院分区：
文献类型：
--
作者：
Guo, Xueyi;Liu, Sheng;Liu, Yong
光催化制氢是高效利用太阳能的最有前途的方法之一。异质结构光催化剂的光捕获能力和界面结构调控着光的注入和传输过程，进而决定了其光催化性能。在这里，我们报告了Janus Cu 1. 94 S-ZnS纳米异质结构光催化剂的合成使用一个简单的化学计量限制的阳离子交换反应。纤锌矿型ZnS和Djurleite型Cu1.94S具有相同的阴离子骨架，不混溶畴之间的晶格失配度约为1.7%。由于高质量的界面结构，Janus Cu 1. 94 S-ZnS纳米异质结构（NHs）在全光谱照射下的光催化析氢速率高达0.918 mmol h（-1）g（-1），分别是单一Cu 1.94S和ZnS纳米晶（NC）的38倍和17倍.结果表明，阳离子交换反应是构建有序界面的有效途径，减少晶格失配和界面缺陷是提高复合光催化剂太阳能转化性能的关键。(C)2021爱思唯尔公司All rights reserved.
Photocatalytic hydrogen evolution is one of the most promising approaches for efficient solar energy conversion. The light-harvesting ability and interfacial structure of heterostructured catalysts regulate the processes of photon injection and transfer, which further determines their photocatalytic performances. Here, we report a Janus Cu1.94S-ZnS nanoheterostructured photocatalyst synthesized using a facile stoichiometrically limited cation exchange reaction. Djurleite Cu1.94S and wurtzite ZnS share the anion skeleton, and the lattice mismatch between immiscible domains is similar to 1.7%. Attributing to the high-quality interfacial structure, Janus Cu1.94S-ZnS nanoheterostructures (NHs) show an enhanced photocatalytic hydrogen evolution rate of up to 0.918 mmol h(-1) g(-1) under full-spectrum irradiation, which is similar to 38-fold and 17-fold more than those of sole Cu1.94S and ZnS nanocrystals (NCs), respectively. The results indicate that cation exchange reaction is an efficient approach to construct well-ordered interfaces in hybrid photocatalysts, and it also demonstrates that reducing lattice mismatch and interfacial defects in hybrid photocatalysts is essential for enhancing their solar energy conversion performance. (C) 2021 Elsevier Inc. All rights reserved.