A BiOCl/β-FeOOH heterojunction for HER photocatalytic performance under visible-light illumination
A BiOCl/β-FeOOH heterojunction for HER photocatalytic performance under visible-light illumination
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BiOCl/β-FeOOH 异质结在可见光照明下的 HER 光催化性能
DOI：
10.1002/er.4420
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发表时间：
2019-05-01
影响因子：
4.6
通讯作者：
Zhao, Chen-hui
中科院分区：
文献类型：
--
作者：
Li, Wei;He, Shu-ao;Zhao, Chen-hui
β-氢氧化铁 (β-FeOOH) 已被证明是 H-2 析出反应 (HER) 过程中的有效助催化剂。本研究通过固态掺杂方法成功合成了BiOCl/β-FeOOH异质结。然后对所制备的光催化剂的结构、组成和光电化学性能进行了研究。由于超小β-FeOOH纳米粒子（NPs）优异的HER光催化活性以及BiOCl/β-FeOOH异质结的形成，该异质结光催化剂在HER过程中表现出非常优异的光催化性能。特别是当β-FeOOH NPs的掺入量适当时，BFOH-2在HER过程中具有最高的光催化活性，在可见光照射6小时内，HER速率约为16.64 mmol center dot g(-1)center dot h(-1)。当适当时，将超小的β-FeOOH NPs植入BiOCl结构中，由于界面相互作用的存在，会形成BiOCl/β-FeOOH异质结界面。因此，这种BiOCl/β-FeOOH异质结表现出优异的可见光响应、快速的光载流子迁移和高效的光载流子分离，从而使BFOH-2异质结具有高效的析氢反应（HER）光催化活性。
beta-iron oxide hydroxide (beta-FeOOH) had been proven to be an effective co-catalyst during H-2 evolution reaction (HER) process. In this research, a BiOCl/beta-FeOOH heterojunction was successfully synthesized by a solid-state doping method. Then, the structure, composition, and photo-electrochemical properties of the prepared photocatalysts were studied. For the superior HER photocatalytic activity of ultrasmall beta-FeOOH nanoparticles (NPs) and the formation of the BiOCl/beta-FeOOH heterojunction, this heterojunction photocatalyst exhibited very superior photocatalytic performance in the HER process. Especially, when the amount of incorporated beta-FeOOH NPs was appropriate, the BFOH-2 possessed the highest photocatalytic activity in HER process, and the HER rate was about 16.64 mmol center dot g(-1)center dot h(-1) during illuminated time of 6 hours under visible light. When appropriate, ultrasmall beta-FeOOH NPs were implanted into the structure of BiOCl, the BiOCl/beta-FeOOH heterojunction interfaces would form for the existence of interfacial interactions. Therefore, this BiOCl/beta-FeOOH heterojunction exhibited superior visible-light response, fast photo-carrier migration, and high-efficient separation of photo-carriers, so that the BFOH-2 heterojunction possessed high-efficient hydrogen evolution reaction (HER) photocatalytic activity.