Exfoliated WS$_2$ nanosheets: optical, photocatalytic and nitrogen-adsorption/desorption characteristics

Bulletin of Materials Science

S J HAZARIKA^1¹ 

[1] Nanoscience and Soft Matter Laboratory, Department of Physics, Tezpur University, PO: Napaam, Tezpur, Assam 784028, India^1

关键词: Nanosheets;    photocatalysis;    TMDC;    sorption process.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

In this work, we report on structural, optical, photocatalytic and nitrogen adsorption–desorption characteristics of WS$_2$ nanosheets developed via a hydrothermal route. X-ray diffraction (XRD) studies have revealed a hexagonal crystal structure, whereas nanodimensional sheets are apparently observed in scanning and transmission electron microscopy (SEM and TEM) micrographs. As compared to the bulk counterpart, the WS$_2$ nanosheets exhibited a clear blue shift. Through Brunauer–Emmett–Teller (BET) surface area analysis, average surface area, pore volume and pore size of the NSs were calculated as 211.5 m$^2$ g$^{−1}$, 0.433 cc g$^{−1}$ and 3.8 nm, respectively. The photocatalytic activity of the WS$_2$ nanosheets was also examined with malachite green (MG) as the target dye under both UV and day light (visible) illumination conditions.Accordingly, a degradation efficiency as high as 67.4 and 86.6% were witnessed for an irradiation time duration of 60 min. The nano-WS$_2$ systems have immense potential in optoelectronics, solid-lubrication and other next generation elements.

【 授权许可】

CC BY