Peng Kang, Wang Hongjie, Li Xiaoyu, Wang Jianwei, Cai Zhixin, Su Lei, Fan Xingyu
State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China.
School of Materials Science and Engineering, Chang'an University, Xi'an, 710064, China.
Sci Rep. 2019 Nov 8;9(1):16325. doi: 10.1038/s41598-019-52191-9.
Tungsten disulfide (WS) as one of transition metal dichalcogenides exhibits excellent catalytic activity. However, its catalytic performances in aqueous phase reactions are limited by its hydrophobicity. Here, the natural hydrophilic two-dimensional clay was used to enhance the dispersibility of WS in aqueous phase. WS/montmorillonite (WS/MMT) composite nanosheets were prepared via hydrothermal synthesis of WS on the surface of montmorillonite from WCl and CHCSNH. The microstructure and morphology show that WS nanosheets are assembled parallelly on the montmorillonite with the interface interaction. Through the support of montmorillonite, WS/MMT possesses higher photocatalytic ability for aqueous phase reactions than WS, which could be due to the synergistic effect of higher adsorption property, higher hydrophilicity, dispersibility and more catalytic reaction site. The strategy could provide new ideas for obtaining novel hydrophilic photocatalyst with excellent performance.
二硫化钨（WS）作为过渡金属二硫属化物之一，具有优异的催化活性。然而，其在水相反应中的催化性能受到其疏水性的限制。在此，使用天然亲水性二维粘土来增强WS在水相中的分散性。通过在蒙脱石表面由WCl和CHCSNH水热合成WS制备了WS/蒙脱石（WS/MMT）复合纳米片。微观结构和形态表明，WS纳米片通过界面相互作用平行组装在蒙脱石上。通过蒙脱石的支撑，WS/MMT在水相反应中比WS具有更高的光催化能力，这可能是由于更高的吸附性能、更高的亲水性、分散性以及更多的催化反应位点的协同效应。该策略可为获得具有优异性能的新型亲水性光催化剂提供新思路。
