Abstract
To address the limitations of titanium dioxide (TiO2) and expand the applicability of the photocatalytic activity of TiO2,WSe2 and silica, an eco-friendly, self-assembled method for combining a silica precursor with a WSe2-graphene-TiO2 composite with cetyltrimethylammonium bromide (CTAB) as surface active agents is proposed. Firstly, for the main target, the photocatalytic degradation of organic dye solutions with different initial pH levels and catalyst dosages under visible light irradiation was surveyed. The as-synthesized sample exhibited highly efficient photocatalytic effects for the treatment of the SO dye solution in the optimal conditions of this study, which included a solution with a pH level of 11 and 0.05-gram dosage of the catalyst. Secondly, previous photocatalytic hydrogen production studies reported markedly better outcomes with SiO2/WSe2-graphene-TiO2 than with the binary WSe2-graphene and ternary WSe2-graphene-TiO2 composites under ambient conditions with and without 20% methanol sacrificing reagents. The SiO2/WSe2-graphene-TiO2 composite is promising to become a potential candidate for photocatalytic performance that performs excellently as well as offer an efficient heterosystem for hydrogen production.
Highlights
IntroductionWith the current aggregation of individual graphene sheets and nanomaterials, the graphene surface interacts with numerous inorganic materials to improve the photocatalytic performance of organic dyes[10,11,12,13]
Enhanced photocatalytic activity has attracted much attention from many scientists around the world due to its ability to address water pollution
Dichalcogenides) source was investigated to help overcome some of the limitations of most materials such as only displaying photocatalytic properties when activated with ultraviolet radiation or exhibiting a fast recombination phenomenon[14,15,16,17]
Summary
With the current aggregation of individual graphene sheets and nanomaterials, the graphene surface interacts with numerous inorganic materials to improve the photocatalytic performance of organic dyes[10,11,12,13] Due to their photocatalytic activities, a semiconductor with a two-dimensional (2D) TMDCs Due to its great advantages such as a large, specific surface area, large pore volume, and uniform and adjustable nano pore size, mesoporous silica is a promising material source for photocatalytic activity[24,25] Mesoporous materials, such as mesoporous silica, have been used as supports for different metal oxide nanoparticles that enhance the catalytic performances over their non-supported analogues[26,27,28,29]. Materials with a mesoporous structure that possessed a high surface area and a narrow pore size distribution exhibited the effective photodegradation of rhodamine B with good results[30]
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