One-step hydrothermal fabrication of SrMoO4/MoS2 composites with strong interfacial contacts for efficient photoreduction removal of Cr(VI),CrystEngComm

当前位置： X-MOL 学术 › CrystEngComm › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

One-step hydrothermal fabrication of SrMoO4/MoS2 composites with strong interfacial contacts for efficient photoreduction removal of Cr(VI)
CrystEngComm ( IF 2.6 ) Pub Date : 2020-06-04 , DOI: 10.1039/d0ce00314j
Yiming Zhang _{1,

2,

3,

4,

5} , Xiaoyan Yang _{5,

6,

7,

8} , Peng Zhang _{3,

4,

5,

6,

9} , Dan Liu _{3,

4,

5,

6,

9} , Yonglin Wang _{3,

4,

5,

6,

9} , Zhouzheng Jin _{1,

2,

3,

4,

5} , Bhekie B. Mamba _{10,

11,

12,

13} , Alex T. Kuvarega _{10,

11,

12,

13} , Jianzhou Gui _{1,

2,

3,

4,

5}

Affiliation

Aimed at alleviating severe recombination of photogenerated electron/hole pairs in MoS₂ photocatalysts, one-pot hydrothermal preparation of SrMoO₄/MoS₂ composites was successfully achieved in this study. It was found that numerous MoS₂ nanosheets were in situ grown on the surface of bulk SrMoO₄; meanwhile, XPS and Raman analyses indicated that a strong interfacial effect was generated between bulk SrMoO₄ and MoS₂ nanosheets in 8%-SrMoO₄/MoS₂ composites. Moreover, the intense heterojunction interface of 8%-SrMoO₄/MoS₂ composites greatly promotes the separation of photoinduced electron–hole pairs and speeds up the transfer of photoinduced charge carriers. Compared with pure MoS₂ and bulk SrMoO₄ photocatalysts, the series of x-SrMoO₄/MoS₂ composites possess enhanced photoreduction activities, especially the 8%-SrMoO₄/MoS₂ photocatalyst displays optimal removal efficiency of Cr(VI) (91.2%) and excellent photostability under visible light irradiation. As a matter of fact, an in situ hybrid process occurs during the preparation of 8%-SrMoO₄/MoS₂ composites, resulting in intense interfacial contacts, which mainly endow them with superior photocatalytic performance. Finally, the photocatalytic mechanism is studied to illustrate the efficient transfer of photoinduced electron/hole pairs and the removal process of Cr(VI).

中文翻译：

具有强界面接触的SrMoO4 / MoS2复合材料的一步式水热制备，可有效地光还原去除Cr（VI）

为了缓解MoS ₂光催化剂中光生电子/空穴对的严重复合，成功完成了一锅水热法制备SrMoO ₄ / MoS ₂复合材料。发现大量的MoS ₂纳米片原位生长在块状SrMoO ₄表面; 与此同时，XPS和拉曼分析表明，在散装SrMoO之间产生强的界面效应₄和MoS _2个在8％-SrMoO纳米片₄ / MOS _2层的复合材料。此外，8％-SrMoO ₄ / MoS ₂的强异质结界面复合材料极大地促进了光致电子-空穴对的分离，并加速了光致电荷载流子的转移。与纯MoS ₂和块状SrMoO ₄光催化剂相比，该系列x -SrMoO ₄ / MoS ₂复合材料具有增强的光还原活性，特别是8％-SrMoO ₄ / MoS ₂光催化剂显示出最佳的Cr（VI）去除率（91.2％），并在可见光照射下具有出色的光稳定性。实际上，在制备8％-SrMoO ₄ / MoS _2的过程中会发生原位杂化过程复合材料，导致强烈的界面接触，这主要使它们具有出色的光催化性能。最后，研究了光催化机理，以说明光致电子/空穴对的有效转移以及Cr（VI）的去除过程。

更新日期：2020-07-06

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11