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Separate-type Pt-free photofuel cell based on a visible light-responsive TiO2 photoanode: Effect of hydrofluoric acid treatment of the photoanode

Paper ID Volume ID Publish Year Pages File Format Full-Text
40453 45854 2013 7 PDF Available
Title
Separate-type Pt-free photofuel cell based on a visible light-responsive TiO2 photoanode: Effect of hydrofluoric acid treatment of the photoanode
Abstract

•The effect of HF etching for visible-light-active TiO2 thin films was investigated.•The HF treatment can enhance their photoelectrochemical properties.•A separate-type photofuel cell using the HF-treated TiO2 thin film was constructed.•The photofuel cell showed an enhanced cell performance.•The conductivity of the TiO2 thin film was revealed to be improved by HF treatment.

The present study deals with the effect of a hydrofluoric acid (HF) treatment of visible light-responsive TiO2 (Vis-TiO2) thin film photocatalysts on their photoelectrochemical performances. The Vis-TiO2 thin film photocatalysts have been prepared on Ti metal substrates by a magnetron sputtering deposition method and then treated by an HF solution. The HF treatment of Vis-TiO2 thin film photocatalysts leads to the dramatic enhancement of their photoelectrochemical performances under UV light and visible light irradiation. Moreover, separate-type Pt-free photofuel cells (SPFCs) constructed using the Vis-TiO2 thin films as photoanodes can generate electricity under light irradiation and simultaneously decompose methanol. The SPFC based on the Vis-TiO2 thin film photoanode etched by HF solution shows the enhanced cell performances with two times higher short-circuit current density and higher energy conversion efficiency than that based on the untreated Vis-TiO2 thin film photoanode. In addition to the increase of surface area and surface roughness, the enhanced conductivity by HF treatment, which is confirmed by Mott–Schottky analyses, is found to be responsible for improvement of cell performances of the SPFC.

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Keywords
Photofuel cell; HF etching; Visible light-responsive TiO2 thin film; Energy conversion; Organic-matter decomposition
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Separate-type Pt-free photofuel cell based on a visible light-responsive TiO2 photoanode: Effect of hydrofluoric acid treatment of the photoanode
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 458, 10 May 2013, Pages 162–168
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us