Iron-doped Pt-TiO2 nanotubes for photo-catalytic water splitting

被引：45

作者：

Eder, D. ^{[1
]}

Motta, M. ^{[1
]}

Windle, A. H. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England

来源：

NANOTECHNOLOGY | 2009年 / 20卷 / 05期

关键词：

TITANIUM-DIOXIDE; RUTILE NANOTUBES; HYBRID MATERIALS; PARTICLE-SIZE; SOLAR-CELLS; TIO2; PHOTOCATALYSTS; DYE;

D O I：

10.1088/0957-4484/20/5/055602

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this work we report on the photo-catalytic performance of phase-pure and iron-doped anatase and rutile nanotubes, produced via a sol-gel process using pristine carbon nanotubes as templates. The encapsulated iron residues can be used to in situ dope the TiO2 nanotubes without phase separation. The anatase and rutile nanotubes were further impregnated with platinum crystals with a uniform dispersion and an average size of similar to 2 nm. The materials showed dramatically improved activities for the photo-catalytic splitting of water compared to commercial TiO2 with similar surface area (up to two orders of magnitudes), due to their higher illumination area, extended absorption range and reduced electron-hole recombination rate. The homogeneous dispersion of platinum nanoparticles further increased the hydrogen evolution rate for anatase nanotubes by a factor of seven in comparison to that for the pristine material, thus proving the great potential for commercial applications.

引用

页数：6

共 27 条

[11]

HOFFMANN MR, 1995, CHEM REV, V95, P96

[12] Impedance measurements in catalysis: charge transfer in titania supported noble metal catalysts [J].

Jochum, Wilfrid ;

Eder, Dominik ;

Kaltenhauser, Gernot ;

Kramer, Reinhard .

TOPICS IN CATALYSIS, 2007, 46 (1-2) :49-55

[13] Microstructured Au/TiO2 model catalyst systems [J].

Kielbassa, S ;

Kinne, M ;

Behm, RJ .

LANGMUIR, 2004, 20 (16) :6644-6650

[14] THE HYDROGENOLYSIS OF METHYLCYCLOPENTANE ON PLATINUM MODEL CATALYSTS - PARTICLE-SIZE EFFECT DUE TO A REACTION OCCURRING AT THE PHASE-BOUNDARY METAL SUPPORT [J].

KRAMER, R ;

ZUEGG, H .

JOURNAL OF CATALYSIS, 1983, 80 (02) :446-456

[15] Photocatalytic generation of H2 gas from neat ethanol over Pt/TiO2 nanotube catalysts [J].

Lin, CH ;

Lee, CH ;

Chao, JH ;

Kuo, CY ;

Cheng, YC ;

Huang, WN ;

Chang, HW ;

Huang, YM ;

Shih, MK .

CATALYSIS LETTERS, 2004, 98 (01) :61-66

[16]

LUNZER S, 2000, STUD SURF SCI CATA C, V130, P2303

[17] Selectivity enhancement in heterogeneous catalysis induced by reaction modifiers [J].

Mallat, T ;

Baiker, A .

APPLIED CATALYSIS A-GENERAL, 2000, 200 (1-2) :3-22

[18]

OHTANI B, 1997, J PHYS CHEM B, V31, P429

[19] MWNT-TiO2:Ni composite catalyst:: A new class of catalyst for photocatalytic H2 evolution from water under visible light illumination [J].

Ou, Yan ;

Lin, Jingdong ;

Fang, Shumei ;

Liao, Daiwei .

CHEMICAL PHYSICS LETTERS, 2006, 429 (1-3) :199-203

[20]

PICHAT P, 1982, NOUV J CHIM, V6, P559

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