Ta3N5 Nanotube Arrays for Visible Light Water Photoelectrolysis

被引：160

作者：

Feng, Xinjian ^{[1
]}

LaTempa, Thomas J. ^{[2
]}

Basham, James I. ^{[2
]}

Mor, Gopal K. ^{[1
]}

Varghese, Oomman K. ^{[1
]}

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

机构：

[1] Penn State Univ, Inst Mat Res, University Pk, PA 16802 USA

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

来源：

NANO LETTERS | 2010年 / 10卷 / 03期

关键词：

Hydrogen; water photoelectrolysis; tantalum nitride; tantalum; photolysis; TIO2; NANOTUBE; SOLAR-ENERGY; TAON; PHOTOCATALYST; EFFICIENCY; CELLS; OXIDE; IRRADIATION; FABRICATION; PHOTOLYSIS;

D O I：

10.1021/nl903886e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Tantalum nitride (Ta3N5) has a band gap of approximately 2.07 eV, suitable for collecting more than 45% of the incident solar spectrum energy. We describe a simple method for scale fabrication of highly oriented Ta3N5 nanotube array films, by anodization of tantalum foil to achieve vertically oriented tantalum oxide nanotube arrays followed by a 700 degrees C ammonia anneal for sample crystallization and nitridation. The thin walled amorphous nanotube array structure enables transformation from tantalum oxide to Ta3N5 to occur at relatively low temperatures, while high-temperature annealing related structural aggregation that commonly occurs in panicle Films is avoided, In I M KOH solution, under AM 1.5 illumination with 0.5 V dc bias typical sample (nanotube length approximate to 240 rim, wail thickness approximate to 7 nm) visible light incident photon conversion efficiencies (IPCE) as high as 5 3% were obtained. The enhanced visible light activity in combination with the ordered one-dimensional nanoarchitecture makes Ta3N5 nanotube arrays films a promising candidate for visible light water photoelectrolysis.

引用

页码：948 / 952

页数：5

共 47 条

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