Photocatalytic hydrogen production over carbon nitride loaded with WS2 as cocatalyst under visible light
Photocatalytic hydrogen production over carbon nitride loaded with WS2 as cocatalyst under visible light
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负载WS2作为助催化剂的氮化碳在可见光下光催化制氢
DOI：
10.1016/j.apcatb.2014.03.002
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发表时间：
2014-09-01
影响因子：
22.1
通讯作者：
Wang, Xinchen
中科院分区：
文献类型：
--
作者：
Hou, Yidong;Zhu, Yongsheng;Wang, Xinchen
采用浸渍硫化法制备了介孔石墨氮化碳（mpg-CN）。通过透射电镜（TEM）和x射线光电子能谱（XPS）证实了WS2和mpg-CN之间的表面异质结。WS2/mpg-CN在可见光（λ > 420 nm）下光催化制H-2表明WS2在催化制H-2中起重要作用。当WS2的添加量为0.3 at.%时，析氢速率达到最佳。结合WS2/mpg-CN的物理化学和电催化性能，可以得出WS2/mpg-CN光催化生成H-2活性增强的主要原因是WS2与mpg-CN之间形成了薄层结，并且WS2作为助催化剂在H-2演化反应中表现优异。(C) 2014 Elsevier B.V.版权所有
Mesoporous graphitic$ carbon nitride (mpg-CN) was loaded with WS2 via an impregnation sulfidation approach. The resultant surface heterojunctions between WS2 and mpg-CN were evidently confirmed with transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Photocatalytic H-2 production on WS2/mpg-CN under visible light (lambda > 420 nm) shows that WS2 plays an important role in catalyzing H-2 production. The rate of hydrogen evolution reaches an optimum when the loading amount of WS2 is about 0.3 at.%. Combined with the physicochemical and electrocatalytic properties of WS2/mpg-CN, it can be concluded that the enhanced photocatalytic H-2 production activity on WS2/mpg-CN is mainly attributed to the thin layered junctions formed between WS2 and mpg-CN and the great performance of WS2 as a cocatalyst in H-2 evolution reaction. (C) 2014 Elsevier B.V. All rights reserved.