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Direct Growth of Cr-doped TiO2 Nanosheet Arrays on Stainless Steel with Visible-Light Photoelectrochemical Properties

Abstract

Cr-doped TiO2 nanosheet arrays growing directly on a stainless steel substrate were successfully achieved by a simple and facile solvothermal reaction without adding Cr-dopant. The stainless steel substrate served as not only the site for the deposition of the TiO2 film but also as the Cr source. The Cr-doped TiO2 film prepared at 180°C for 36 h consists of ultrathin nanosheet arrays (a length of ~860 nm) with a high surface area of 180.77 m2g–1. Long reaction time results in a red shift of the absorption edges and also decreases in band gap energies due to a small amount of Cr3+ doping. The unique nanostructures and appropriate composition endowed the Cr-TiO2 nanosheet arrays excellent performances in photoelectrochemistry under UV illumination. The photocurrent densities under the visible light illumination of as-prepared Cr-TiO2 nanosheet arrays are markedly enhanced after high-temperature calcination, which can be attributed to improved crystallinity, wider visible light response, better binding force and the increase of oxygen vacancies of the films.

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Publication details

The article was received on 07 Oct 2017, accepted on 07 Dec 2017 and first published on 07 Dec 2017


Article type: Paper
DOI: 10.1039/C7NJ03830E
Citation: New J. Chem., 2017, Accepted Manuscript
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    Direct Growth of Cr-doped TiO2 Nanosheet Arrays on Stainless Steel with Visible-Light Photoelectrochemical Properties

    G. Mao, M. Xu, S. Yao, B. Zhou and Q. Liu, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ03830E

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