WSSe Nanocomposites for Enhanced Photocatalytic Hydrogen Evolution and Methylene Blue Removal under Visible-Light Irradiation

Abstract

In this study, a novel tungsten disulfide diselenide (WSSe) nanocomposite by a facile hydrothermal process with great capable photocatalytic efficiency for hydrogen evolution from water and organic compound removal was discussed. The WSSe nanocomposites form heterojunctions in order to inhibit the quick recombination rate of photo-induced electrons and holes. This is considered to be a useful method in order to enhance the capability of photocatalytic hydrogen production. The hydrogen production rate of the WSSe nanocomposites approaches 3647.4 μmol/g/h, which is 12 and 11 folds the rates of the bare WS2 and WSe2, respectively. Moreover, the excellent photocatalytic performance for Methylene blue (MB) removal (88%) was 2.5 and 1.8 times higher than those of the bare WS2 and WSe2, respectively. The great photocatalytic efficiency was owing to the capable electrons and holes separation of WSSe and the construction of the heterostructure, which possessed vigorous photocatalytic oxidation and reduction potentials. The novel one-dimensional structure of the WSSe heterojunction shortens the transport pathway of the photo-induced electrons and holes. It possesses the great capable photocatalytic efficiency of the hydrogen production and organic dye removal. This study offers an insight into the route of interfacial migration and separation for induced charge carriers in order to generate clean hydrogen energy and to solve the issue of environmental pollution.

A Novel MoS2/TiO2/Graphene Nanohybrid for Enhanced Photocatalytic Hydrogen Evolution under Visible Light Irradiation

“…It displayed two major feature peaks at 162.37 and 163.49 eV, referring to S 2p 3/2 and S 2p 1/2, respectively [29]. Furthermore, the XPS spectrum of Ti represents two peaks at 459.68 and 464.95 eV, referring to Ti 2p 3/2 and Ti 2p 1/2 of the MTG-10 sample (Figure 3d), respectively [30]. The Gaussian peak fitting of O 1s in the nanohybrid exhibited three varied peaks at 530.98, 531.92, and 532.76 eV (Figure 3e) and adsorbed oxygenated species, respectively.…”

Improved Charge Storage Capacity of Supercapacitor Electrodes by Engineering Surfaces: The Case of Janus MXenes

“…To this end, quasi-2D Janus materials MoSSe and WSSe from the transition metal dichalcogenide family have been synthesized. Experiments discovered that these compounds exhibit photovoltaic properties, a superior catalytic activity for the hydrogen evolution reaction (HER), vertical piezoelectricity, , and the Rashba effect, − among other novel features. These clearly are the effects of structural modifications of the pristine dichalcogenides.…”

A Novel ZnO/Co3O4 Nanoparticle for Enhanced Photocatalytic Hydrogen Evolution under Visible Light Irradiation

“…Thus, a great amount of effort has been made to solve these issues. Among different methods, the introduction of heterostructures is a great opportunity for the performance of photoinduced carrier separation in hybrid photocatalysts [17]. The band bending at the heterostructure drives photoinduced charge carrier separation and migration in the opposite direction, restraining electron and hole pair recombination and improving photocatalytic efficiency [18].…”