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Hydrothermal formation of N/Ti3+codoped multiphasic (brookite-anatase-rutile) TiO2 heterojunctions with enhanced visible light driven photocatalytic performance

Abstract

Mixed phased TiO2 catalysts codoped with N and Ti3+ have been successfully synthesized by a low-temperature, one step hydrothermal method using TiN as the precursor. The as prepared samples have been studied for their crystalline structure, morphology, composition, optical and photoluminescent properties using various analytical techniques such as X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), UV-visible spectroscopy, and X-ray photoelectron spectroscopy (XPS). It was observed that N and Ti3+ codoped TiO2 samples having mixed phases of brookite, anatase and rutile can be obtained under a wide range of hydrothermal temperature ranging from 24 h to 72 h. The as-prepared samples exhibit a distinct red shift, suggesting that N and Ti3+ codoping significantly enhances the optical absorption characteristics of TiO2. The photocatalytic activity of the prepared samples was studied for methylene blue and colorless resorcinol dyes. The prepared samples demonstrated good photocatalytic response because of excellent mixed phase crystalline structure and increase in threshold wavelength response. The mechanism of photocatalytic degradation reaction has also been studied. This work develops a novel strategy to fabricate and extend the visible light response of TiO2,which facilitate their application in the environment and energy issues.

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Publication details

The article was received on 04 Sep 2017, accepted on 11 Oct 2017 and first published on 11 Oct 2017


Article type: Paper
DOI: 10.1039/C7DT03268D
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Hydrothermal formation of N/Ti3+codoped multiphasic (brookite-anatase-rutile) TiO2 heterojunctions with enhanced visible light driven photocatalytic performance

    M. Sun, Y. Kong, Y. Fang, S. Sood, Y. Yao, J. Shi and A. Umar, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT03268D

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