One-Step Hydrothermal Synthesis and Visible-Light Photocatalytic Activity of Ultrafine Cu-Nanodot-Modified TiO2 Nanotubes
Zhao Peng-Jun; Wu Rong; Hou Juan; Chang Ai-Min; Guan Fang; Zhang Bo; Chang, AM
2012
Source PublicationACTA PHYSICO-CHIMICA SINICA
ISSN1000-6818
Volume28Issue:8Pages:1971-1977
Abstract

One dimensional titanate nanotubes modified with copper nanospheres were synthesized through a facile one-step hydrothermal process. Transmission electron microscope (TEM), X-ray diffraction (XRD), and energy dispersive spectrometry (EDS) were used to monitor the changes in the morphology and phases during the hydrothermal process. The diameter of the Cu-TiO2 composite nanotubes was 10-15 nm and their lengths were ca 100 nm, the dimension of the covered Cu nanoparticles was about 5 nm. Brunauer-Emmett-Teller (BET) tests revealed the specific surface area of the Cu-TiO2 composite nanotubes to be 154.67 m(2) . g(-1). The formation process and mechanism of the composite nanotubes were surveyed by adjusting the hydrothermal duration and titanium precursor. The results revealed that an amorphous titanium precursor is essential for the successful formation of this unique topography and phase composition. Anti-Ostwald ripening, a decrease in the dimensions of the copper nanospheres with hydrothermal time, was observed in the TEM images, which is of benefit to helps keep the particles on the nanoscale. The UV-Vis spectrum of the as-prepared material exhibits a strong absorption at 350-800 nm in the visible band compared with commercial TiO2 nanopowders. The plasmonic absorption of metallic copper particles between 550 and 600 nm is seen in the UV-Vis spectrum. Schottky barriers between copper-TiO2 interfaces make this kind of material a potential agent in speeding up electron transport rates and slowing recombination rates. Photocatalytic experiments demonstrated this unique Cu-TiO2 composite nanotube material has a high photocatalytic activity under visible-light irradiation.

KeywordVisible-light Photocatalysis Tio2 Cu One Step Hydrothermal Method Composite Nanotube
Subject AreaChemistry
DOI10.3866/PKU.WHXB201206111
Indexed BySCI
WOS IDWOS:000307486200025
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/2799
Collection新疆维吾尔自治区电子信息材料与器件重点实验室
Corresponding AuthorChang, AM
AffiliationChinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Xinjiang Key Lab Elect Informat Mat & Devices, Urumqi 830011, Peoples R China;Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhao Peng-Jun,Wu Rong,Hou Juan,et al. One-Step Hydrothermal Synthesis and Visible-Light Photocatalytic Activity of Ultrafine Cu-Nanodot-Modified TiO2 Nanotubes[J]. ACTA PHYSICO-CHIMICA SINICA,2012,28(8):1971-1977.
APA Zhao Peng-Jun.,Wu Rong.,Hou Juan.,Chang Ai-Min.,Guan Fang.,...&Chang, AM.(2012).One-Step Hydrothermal Synthesis and Visible-Light Photocatalytic Activity of Ultrafine Cu-Nanodot-Modified TiO2 Nanotubes.ACTA PHYSICO-CHIMICA SINICA,28(8),1971-1977.
MLA Zhao Peng-Jun,et al."One-Step Hydrothermal Synthesis and Visible-Light Photocatalytic Activity of Ultrafine Cu-Nanodot-Modified TiO2 Nanotubes".ACTA PHYSICO-CHIMICA SINICA 28.8(2012):1971-1977.
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