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Indexed by:期刊论文

Date of Publication:2017-12-01

Journal:JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

Included Journals:SCIE、EI

Volume:5

Issue:6

Page Number:6114-6121

ISSN No.:2213-2929

Key Words:Crystalline carbon-TiO2; Photocatalysis; One-pot hydrothermal synthesis; Visible-light; Organic dyes

Abstract:A simple and convenient in-situ one-pot hydrothermal synthesis method was developed for preparing crystalline carbon modified titanium dioxide composite (C-TiO2) by using tetrabutyle titanate and glucose as co-precursors. Such a method can avoid the expensive templates and tedious procedures for the fabrication of carbon doped titanium dioxide materials. The morphology and microstructure characteristics of C-TiO2 photocatalysts were characterized by means of XRD, TEM, FT-IR, N-2 adsorption-desorption measurements, elemental analysis, XPS and UV-vis/DRS. The experimental results showed that the TiO2 nanoparticles were dispersed unanimously on carbon layer. The as prepared C-TiO2 composites possessed larger specific surface area, higher separation efficiency of charge carrier pairs and greater visible light absorbance than pure TiO2. The fabricated C-TiO2 samples showed excellent photocatalytic activities towards organic dye pollutants (Rhodamine B and methylene blue) under visible light irradiation and the photoactivity of the C-TiO2 samples was superior to pristine TiO2. The enhanced photocatalytic efficiency can be attributed to the synergetic effects of carbon species and TiO2 nanocrystals.