Enhanced photochemical response of TiO2ZCdSe heterostructured nanowires

Jung Chul Lee, Tae Geun Kim, Heon-Jin Choi, Yun Mo Sung

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

High-density single-crystalline TiO2 nanowires (∼50 nm diam) were successfully grown on Ti substrates by chemical vapor deposition at a low temperature of 700 °C and within a remarkably short time period of 5 min. They were combined with CdSe nanocrystals (°5 nm diam) to form TiO 2/CdSe heterotructured nanowires by overcoating the nanowires with the CdSe-containing solution and subsequent annealing at 600 °C. The TiO2/CdSe nanowires showed uniformly distributed CdSe nanocrystals, and high crystallinity of rutile and wurtzite from the TiO2 and the CdSe, respectively. Owing to the heterostructure of the TiO2/ CdSe, they demonstrate almost full visible-range light absorption and thus enhanced photocatalytic activity by charge separation via electron and hole transfer between the CdSe and the TiO2.

Original languageEnglish
Pages (from-to)2588-2593
Number of pages6
JournalCrystal Growth and Design
Volume7
Issue number12
DOIs
Publication statusPublished - 2007 Dec 1

Fingerprint

Nanowires
nanowires
Nanocrystals
nanocrystals
polarization (charge separation)
electromagnetic absorption
rutile
wurtzite
Light absorption
Heterojunctions
Chemical vapor deposition
crystallinity
electron transfer
vapor deposition
Annealing
Crystalline materials
annealing
Electrons
Substrates
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Lee, Jung Chul ; Kim, Tae Geun ; Choi, Heon-Jin ; Sung, Yun Mo. / Enhanced photochemical response of TiO2ZCdSe heterostructured nanowires. In: Crystal Growth and Design. 2007 ; Vol. 7, No. 12. pp. 2588-2593.
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Enhanced photochemical response of TiO2ZCdSe heterostructured nanowires. / Lee, Jung Chul; Kim, Tae Geun; Choi, Heon-Jin; Sung, Yun Mo.

In: Crystal Growth and Design, Vol. 7, No. 12, 01.12.2007, p. 2588-2593.

Research output: Contribution to journalArticle

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T1 - Enhanced photochemical response of TiO2ZCdSe heterostructured nanowires

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AU - Kim, Tae Geun

AU - Choi, Heon-Jin

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AB - High-density single-crystalline TiO2 nanowires (∼50 nm diam) were successfully grown on Ti substrates by chemical vapor deposition at a low temperature of 700 °C and within a remarkably short time period of 5 min. They were combined with CdSe nanocrystals (°5 nm diam) to form TiO 2/CdSe heterotructured nanowires by overcoating the nanowires with the CdSe-containing solution and subsequent annealing at 600 °C. The TiO2/CdSe nanowires showed uniformly distributed CdSe nanocrystals, and high crystallinity of rutile and wurtzite from the TiO2 and the CdSe, respectively. Owing to the heterostructure of the TiO2/ CdSe, they demonstrate almost full visible-range light absorption and thus enhanced photocatalytic activity by charge separation via electron and hole transfer between the CdSe and the TiO2.

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