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[1]方俊雄,邓文明,江吉周,等.β-FeOOH/U-g-C3N4异质结的制备及光电催化析氢性能[J].武汉工程大学学报,2020,42(02):165-171，206.[doi:10.19843/j.cnki.CN42-1779/TQ.202001021]
　FANG Junxiong,DENG Wenming,JIANG Jizhou,et al.Preparation of β-FeOOH/U-g-C3N4 Heterojunction and Their Performances in Photoelectrocatalytic Hydrogen Evolution Reaction[J].Journal of Wuhan Institute of Technology,2020,42(02):165-171，206.[doi:10.19843/j.cnki.CN42-1779/TQ.202001021]
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
42
期数:
2020年02期
页码:
165-171，206
栏目:
材料科学与工程
出版日期:
2021-01-26

文章信息/Info

Title:
Preparation of β-FeOOH/U-g-C3N4 Heterojunction and Their Performances in Photoelectrocatalytic Hydrogen Evolution Reaction
文章编号:
1674 - 2869（2020）02 - 0165 - 07
作者:
方俊雄; 邓文明; 江吉周; 邹　菁*
武汉工程大学化学与环境工程学院，湖北 武汉 430205
Author(s):
FANG Junxiong; DENG Wenming; JIANG Jizhou; ZOU Jing*
School of Chemistry and Environmental Engineering，Wuhan Institute of Technology，Wuhan 430205， China
关键词:
β-FeOOH/U-g-C3N4; 异质结; 光电催化活性; 析氢反应; 超声波法
Keywords:
β - FeOOH/U - g - C3N4 ; heterojunction; photoelectrocatalyticactivity; hydrogen evolution reaction（HER）; ultrasonic method
分类号:
O614.81
DOI:
10.19843/j.cnki.CN42-1779/TQ.202001021
文献标志码:
A
摘要:
通过两步合成法合成了新型的β-FeOOH/U-g-C3N4异质结光催化剂。首先通过热聚合制备超薄g-C3N4（U-g-C3N4）样品，然后通过超声技术以U-g-C3N4和FeCl3·6H2O为前驱体制备β-FeOOH/U-g-C3N4异质结。系统研究了铁盐种类、前驱体质量比、pH值和超声时间等合成条件对β-FeOOH/U-g-C3N4异质结光催化析氢性能的影响。具有最佳析氢性能的β-FeOOH/U-g-C3N4异质结的比表面积为47.7 m2·g-1，是U-g-C3N4的3倍；与U-g-C3N4相比，β-FeOOH/U-g-C3N4异质结的能带隙从2.70 eV降低到2.02 eV，吸收边带从472 nm红移至583 nm。另外，光催化制氢反应中β-FeOOH/U-g-C3N4异质结的Tafel斜率为87.2 mV·dec-1，低于U-g-C3N4的147.4 mV·dec-1和β-FeOOH的156.8 mV·dec-1。结果表明复合产物较U-g-C3N4具有更高的光电催化活性。光电催化活性提高应归因于β-FeOOH和U-g-C3N4形成了异质结，界面电子通过碳物质可以更高效地转移，同时产生了较多的活性反应位点。因此，通过超声法将β-FeOOH和U-g-C3N4复合是一种制备较高光电催化活性且稳定的光电催化材料的有效策略之一。
Abstract:
A new type of β-FeOOH/U-g-C3N4 heterojunction photocatalyst was synthesized by two-step synthesis method，where the ultra-thin g-C3N4（U-g-C3N4） sample was firstly prepared with thermal polymerization，followed by an ultrasonic technique to fabricate the β-FeOOH/U-g-C3N4 heterojunction with U-g-C3N4 and FeCl3·6H2O as precursors. The effects of synthesis conditions such as the type of iron salt，mass ratio of the precursors，pH and ultrasonic time on the photocatalytic performance of β-FeOOH/U-g-C3N4 heterojunction were systematically investigated. The β-FeOOH/U-g-C3N4 heterojunction with best hydrogen evolution performance showed a specific surface area of 47.7 m2·g-1，which was three times that of U-g-C3N4. Compared with U-g-C3N4，the band gap of β-FeOOH/U-g-C3N4 heterojunction reduced from 2.70 to 2.02 eV and the absorption edge redshifted from 472 to 583 nm. Moreover，the Tafel slope of β-FeOOH/U-g-C3N4 heterojunction in the photocatalytic hydrogen evolution reaction was 87.2 mV·dec-1，being lower than 147.4 mV·dec-1 of U-g-C3N4 and 156.8 mV·dec-1 of β-FeOOH. These results show that the β-FeOOH/U-g-C3N4 nanocomposites display a higher photoelectrocatalytic activity than U-g-C3N4. The increased photoelectrocatalytic activity is attributed to the formation of heterojunctions between β-FeOOH and U-g-C3N4. Electrons at the interface can be transferred more efficiently through carbon materials，and more active reaction sites are generated. Therefore，the combination of U - g - C3N4 and β - FeOOH is one of the effective strategies to improve its stability and photoelectrocatalytic activity.

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备注/Memo

备注/Memo:
收稿日期：2020-01-27基金项目：国家自然科学基金（21471122）；武汉工程大学第十一届研究生教育创新基金（CX2019193）作者简介：方俊雄，硕士研究生。E-mail：[email protected]*通讯作者：邹　菁，博士，教授，博士研究生导师。E-mail： [email protected]引文格式：方俊雄，邓文明，江吉周，等. β-FeOOH/U-g-C3N4异质结的制备及光电催化析氢性能［J］. 武汉工程大学学报，2020，42（2）：165-171，206.
更新日期/Last Update: 2020-06-19