An eco-friendly synthesized mesoporous-silica particle combined with WSe 2 -graphene-TiO 2 by self-assembled method for photocatalytic dye decomposition and hydrogen production

摘要

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.