首页|(163039)Mxene-TiO_2 composite with exposed {101} facets for the improved photocatalytic hydrogen evolution activity
(163039)Mxene-TiO_2 composite with exposed {101} facets for the improved photocatalytic hydrogen evolution activity
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NSTL
Elsevier
Fabricating Ti_3C_2T_x Mxene based composite with good control of size, morphology and facet for the high-efficiency photocatalytic application is of great potential and highly challenging. In this work, Ti_3C_2-TiO_2 composite are prepared by a simple two-phase assembling method from the Ti_3C_2 Mxene dispersion modified with tetraethyl hydroxyl ammonium (TEHA) and rhombic-shaped TiO_2 nanoparticles with exposed {101} facets. The Ti_3C_2 Mxene acts as a good support to anchor TiO_2 nanoparticles of 15 nm with good facet control. A significantly enhanced photocatalytic hydrogen evolution activity is acquired by the Ti_3C_2-TiO_2 composites. The highest H_2 production rate of 390.92 μmol h~(-1) is gained by the Ti_3C_2-TiO_2 composites with the Ti_3C_2 weight percentage of 6.7%, which is 2.1 times that of pristine TiO_2. The excellent photocatalytic activity can be attributed to the extended light absorption, the boost charge separation efficiency and exposed {101} facets in the TiO_2 nanoparticles. This work provides a new strategy to prepare high quality MXene Ti_3C_2-TiO_2 hybrids with good photocatalytic properties, which could be widely applied to produce other MXene-based composites with excellent properties.
Guangdong University of Technology, School of Light Industry & Chemical Engineering, Guangzhou Key Lab Clean Transport Energy Chemistry, Guangzhou 510006, China
NSTL
Elsevier
