Effect of Rapid Infrared Annealing on the Photoelectrochemical Properties of Anodically Fabricated TiO2 Nanotube Arrays

被引：47

作者：

Allam, Nageh K. ^{[1
]}

Grimes, Craig A. ^{[1
,2
]}

机构：

[1] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[2] Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 19期

关键词：

CRYSTALLIZATION; FILMS; PHOTOCATALYSIS; TEMPERATURE; STABILITY; GROWTH; CELLS;

D O I：

10.1021/jp902140d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A significant enhancement in the photoconversion efficiency of anodically grown titania nanotube array photoanodes is observed when crystallized using an infrared annealing process. This infrared (IR) annealing treatment is performed over relatively short periods, 5-15 min, over the temperature range 300-600 degrees C with the anatase crystallite size increasing with annealing temperature and duration. Used as photoanodes to photoelectrochemically split water, the 15 min, 600 degrees C IR crystallized nanotube arrays show a three-electrode photoconversion efficiency of 13.13% under UV illumination (100 mW/cm(2) 320-400 nm, 1 M KOH). A reduction in the carrier trap states and an increased charge carrier transport due to reduction of the barrier layer thickness are believed responsible for the significant conversion efficiency seen with the IR annealed samples.

引用

页码：7996 / 7999

页数：4

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