The Spin-Coater, Hydrothermal Synthesis and Characterizations of MoS2/TiO2 Nanoflake for Photoelectrochemical Application

Abstract

MoS₂/TiO₂ nanoflakes (NFs) have been synthesized using the spin-coater and hydrothermal method at a temperature of 180 ^oC for photoelectrochemical application. The thick-MoS₂ nanoflakes are about a few nano to tens of nano for 4 – 8 h, which consist of highly active sites at edges and planes to improve photoconversion efficiency. XRD pattern of MoS₂/TiO₂ NFs showed both hexagonal and anatase phases for MoS₂ and TiO₂, respectively, with a high crystal quality. At room temperature, the photoluminescence spectra of MoS₂ NFs exhibited an asymmetric shape and good emission peak at 688 nm. The photoelectrochemical cell of the MoS₂/TiO₂ nanostructure obtained a photocurrent density of 3.5 mA. cm^–2 at –0.8 V (vs. SCE), using 0.5 M H₂SO₄ electrolyte. As a result, we propose a potential fabrication of high-efficiency optoelectronic devices through the synthesis of MoS₂ NFs hybrid with traditional photocatalyst oxide materials by the one-step hydrothermal approach.