Ta3N5 nanotube arrays for visible light water photoelectrolysis.

Ta3N5 nanotube arrays for visible light water photoelectrolysis.

Nano letters (2010-02-12)

Xinjian Feng, Thomas J Latempa, James I Basham, Gopal K Mor, Oomman K Varghese, Craig A Grimes

PMID20146505

ABSTRACT

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 particle films is avoided. In 1 M KOH solution, under AM 1.5 illumination with 0.5 V dc bias typical sample (nanotube length approximately 240 nm, wall thickness approximately 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.

MATERIALS

Product Number

Brand

Product Description

GF98666230

Tantalum, foil, light tested, 150x150mm, thickness 0.03mm, as rolled, 99.9%

GF52742099

Tantalum, foil, light tested, 100x100mm, thickness 0.034mm, as rolled, 99.9%

GF33704142

Tantalum, foil, not light tested, 100x100mm, thickness 0.009mm, 99.9%

GF19254472

Tantalum, foil, not light tested, 25x25mm, thickness 0.0005mm, 99.9%

GF83507238

Tantalum, foil, light tested, 100x100mm, thickness 0.03mm, as rolled, 99.9%

GF98156144

Tantalum, foil, not light tested, 25x25mm, thickness 0.0015mm, 99.9%

GF15979494

Tantalum, foil, light tested, 50x50mm, thickness 0.075mm, annealed, 99.9%

GF55545149

Tantalum, foil, light tested, 25x25mm, thickness 0.02mm, 99.9%

GF65369324

Tantalum, foil, light tested, 100x100mm, thickness 0.05mm, annealed, 99.9%

GF15129817

Tantalum, foil, not light tested, 50x50mm, thickness 0.01mm, 99.9%

GF90076989

Tantalum, foil, not light tested, 50x50mm, thickness 0.0015mm, 99.9%

GF64866202

Tantalum, foil, not light tested, 82x100mm, thickness 0.006mm, 99.9%

GF84327510

Tantalum, foil, not light tested, 25x25mm, thickness 0.01mm, 99.9%

GF00815958

Tantalum, foil, not light tested, 25x25mm, thickness 0.001mm, 99.9%

GF11923589

Tantalum, foil, light tested, 25x25mm, thickness 0.006mm, 99.9%

GF40402572

Tantalum, foil, 6mm disks, thickness 0.009mm, 99.9%

GF51719317

Tantalum, foil, 25mm disks, thickness 0.15mm, annealed, 99.9%

GF87367405

Tantalum, foil, 4mm disks, thickness 0.75mm, annealed, 99.9%

GF27272167

Tantalum, foil, 8mm disks, thickness 0.025mm, as rolled, 99.9%

GF68866060

Tantalum, foil, 6mm disks, thickness 0.100mm, annealed, 99.9%

GF23523229

Tantalum, foil, 4mm disks, thickness 0.009mm, 99.9%

GF62916318

Tantalum, foil, 10mm disks, thickness 0.75mm, annealed, 99.9%

GF35443672

Tantalum, foil, 6mm disks, thickness 0.0125mm, 99.9%

GF99539667

Tantalum, foil, 2m coil, thickness 0.025mm, coil width 0.75mm, annealed, 99.9%

GF53856186

Tantalum, foil, 1m coil, thickness 0.03mm, coil width 1.2mm, annealed, 99.9%

GF85320907

Tantalum, foil, 15mm disks, thickness 0.03mm, as rolled, 99.9%

GF24472616

Tantalum, foil, 50mm disks, thickness 0.075mm, annealed, 99.9%

GF89833854

Tantalum, foil, 4mm disks, thickness 0.5mm, annealed, 99.9%

GF23496756

Tantalum, foil, 50mm disks, thickness 0.03mm, as rolled, 99.9%

GF64539872

Tantalum, foil, 15mm disks, thickness 0.75mm, annealed, 99.9%