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论文类型：期刊论文

发表时间：2008-07-01

发表刊物：CARBON

收录刊物：SCIE、EI

卷号：46

期号：8

页面范围：1126-1132

ISSN号：0008-6223

摘要：A two-dimensional TiO2/carbon nanowall composite material was fabricated by growing carbon nanowalls on a Ti sheet with hot filament chemical vapor deposition, followed by metal-organic chemical vapor deposition using titanium isopropoxide as TiO2 precursor and argon as carrier gas. Scanning electron microscopy showed that TiO2 was uniformly coated on the entire carbon nanowall and a TiO2/carbon nanowall composite was obtained. Raman spectroscopy and X-ray diffraction indicated that the crystal phase of the TiO2 coating was anatase. The asymmetry of the current-voltage plot for the material revealed that a heterojunction was formed between the TiO2 and the carbon nanowall. As a result of this heterojunction, enhanced separation of photogenerated electrons and holes was confirmed by surface photovoltage and photocurrent measurements. The investigation of photocatalytic ability showed that the TiO2/carbon nanowall had a higher photocatalytic activity than TiO2 nanotubes for the degradation of phenol under UV light irradiation. (C) 2008 Elsevier Ltd. All rights reserved.