Photo-electrochemical hydrogen generation using band-gap modified nanotubular titanium oxide in solar light

被引：105

作者：

Raja, K. S. ^{[1
]}

Misra, M. ^{[1
]}

Mahajan, V. K. ^{[1
]}

Gandhi, T. ^{[1
]}

Pillai, P. ^{[1
]}

Mohapatra, S. K. ^{[1
]}

机构：

[1] Univ Nevada, Reno, NV 89557 USA

来源：

JOURNAL OF POWER SOURCES | 2006年 / 161卷 / 02期

关键词：

hydrogen generation; titania nanotubes; photo-electrochemical; band-edges; CHEMICALLY-MODIFIED N-TIO2; WATER; TIO2; PHOTOCATALYSIS; CONVERSION; LAYER; FILM;

D O I：

10.1016/j.jpowsour.2006.06.044

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：

Anodization of Ti in acidified fluoride solution results in an ordered nanotubular titanium oxide surface. In this study, vertically oriented arrays of TiO2 nanotubes were prepared by incorporating nitrate and phosphate species during the anodization process. These nanotubes were annealed at 650 degrees C in a carbonaceous atmosphere using a chemical vapor deposition (CVD) furnace for a brief period. The carbon-modified nanotubular TiO2 produced a photo-current density of more than 2.75 mA cm(-2) at 0.2 V-Ag/(AgCl) under solar light illumination. This photo-current density corresponds to a hydrogen evolution rate of about 111 h(-1) using a photo-anode of 1 m(2) area. The enhanced hydrogen evolution behavior of carbon-modified nanotubular TiO2 is highly reproducible and sustainable for long duration. Annealed (at 350 degrees C in nitrogen atmosphere) TiO2 nanotubes showed improved photo-activity as compared to the as-anodized or thermally oxidized TiO2 photo-anodes. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1450 / 1457

页数：8

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