Visible-light-driven activity and synergistic mechanism of $TiO_{2}@g-C_{3}N_{4}$ heterostructured photocatalysts fabricated through a facile and green procedure for various toxic pollutants removal

Content Provider	Scilit
Author	Xiao, Gang Xu, Shengnan Li, Peifeng Su, Haijia
Copyright Year	2018
Description	Journal: Nanotechnology Heterostructured photocatalysts based on g-C3N4 and TiO2 represent a kind of promising photocatalysts in environmental field, but the synthesis methods are always complex and not green. In the present paper, a facile and green one-step calcination procedure at lower temperature (450 ºC) with the assistance of water was developed to synthesize a visible-light-active TiO2@g-C3N4 heterostructured photocatalyst, which showed higher visible-light-driven activity (k = 0.014 min-1) than pure g-C3N4 (k = 0.0036 min-1) and TiO2 (k = 0.0067 min-1) for methyl orange degradation. Excellent performance (over 90% conversion) was also observed for the removal of rhodamine B, phenol, and Cr(VI) under visible light. The heterostructured photocatalyst showed favorable reusability with preserving 86% of its activity after five successive cycles. A mechanism study demonstrates that the enhanced photocatalytic activity results from the efficient separation of the photo-generated charge carriers through the intimate interface between the two semiconductors based on their appropriate band structures and light-induced mechanism. The heterostructured photocatalyst will certainly find wide applications in the treatment various toxic pollutants in wastewater using abundant solar energy. Furthermore, this facile and green procedure and the proposed synergistic mechanism will provide guidelines in designing other g-C3N4 based organic-inorganic composite photocatalysts for various applications.
Related Links	http://iopscience.iop.org/article/10.1088/1361-6528/aac304/pdf
ISSN	09574484
e-ISSN	13616528
DOI	10.1088/1361-6528/aac304
Journal	Nanotechnology
Issue Number	31
Volume Number	29
Language	English
Publisher	IOP Publishing
Publisher Date	2018-05-08
Access Restriction	Open
Subject Keyword	Journal: Nanotechnology Chemical Engineering Environmental Sciences Heterostructured Photocatalyst Pollutants Removal
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Mechanics of Materials Mechanical Engineering Bioengineering Electrical and Electronic Engineering