Universität zu Köln

Pan, Jun, Huehne, Sven-Martin, Shen, Hao ORCID: 0000-0001-5098-7948, Xiao, Lisong, Born, Philip, Mader, Werner and Mathur, Sanjay (2011). SnO2-TiO2 Core-Shell Nanowire Structures: Investigations on Solid State Reactivity and Photocatalytic Behavior. J. Phys. Chem. C, 115 (35). S. 17265 - 17270. WASHINGTON: AMER CHEMICAL SOC. ISSN 1932-7455

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Abstract

Two-step chemical vapor deposition (CVD) in combination with metal-catalyzed vapor-liquid-solid (VLS) growth mechanism was used as a new approach to synthesize and modify the morphology of SnO2-TiO2 core-shell nanowires. SnO2 nanowires were grown by decomposition of Sn((OBu)-Bu-t)(4) precursor on Au-coated Al2O3 substrates followed by the growth of a TiO2 overlayer by the CVD of Ti((OPr)-Pr-i)(4). Structural characterization of SnO2-TiO2 heterostructures by X-ray diffraction and high-resolution TEM revealed the formation of mixed SnxTi1-xO2 compositions (x = 0.857-1.0) at the SnO2-TiO2 phase boundaries, where x depended on the annealing temperatures. The observed oriented attachment of TiO2 nanoclusters on single crystal SnO2 core was possibly due to low lattice mismatch. The photocatalytic studies suggested an enhanced activity in SnO2-TiO2 heterostructures due to higher surface area and change in the electronic structures caused by Sn4+ doping in TiO2.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Pan, Jun UNSPECIFIED UNSPECIFIED UNSPECIFIED Huehne, Sven-Martin UNSPECIFIED UNSPECIFIED UNSPECIFIED Shen, Hao UNSPECIFIED orcid.org/0000-0001-5098-7948 UNSPECIFIED Xiao, Lisong UNSPECIFIED UNSPECIFIED UNSPECIFIED Born, Philip UNSPECIFIED UNSPECIFIED UNSPECIFIED Mader, Werner UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-489182
DOI:	10.1021/jp201901b
Journal or Publication Title:	J. Phys. Chem. C
Volume:	115
Number:	35
Page Range:	S. 17265 - 17270
Date:	2011
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1932-7455
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SILICON; HETEROSTRUCTURES; FABRICATION; PARTICLES; DIFFUSION; GROWTH; CELLS Multiple languages Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/48918