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学科主题: Chemistry
题名: One-Step Hydrothermal Synthesis and Visible-Light Photocatalytic Activity of Ultrafine Cu-Nanodot-Modified TiO2 Nanotubes
作者: Zhao Peng-Jun; Wu Rong; Hou Juan; Chang Ai-Min; Guan Fang; Zhang Bo
通讯作者: Chang, AM
关键词: Visible-light photocatalysis ; TiO2 ; Cu ; One step hydrothermal method ; Composite nanotube
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 2012
DOI: 10.3866/PKU.WHXB201206111
卷: 28, 期:8, 页:1971-1977
收录类别: SCI
资助者: "Western Light Joint Scholar Foundation" Program of Chinese Academy of Sciences LHXZ200902; China Postdoctoral Science Foundation 20100471679, 201104704
摘要: 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.
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内容类型: 期刊论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/2799
Appears in Collections:新疆维吾尔自治区电子信息材料与器件重点实验室_期刊论文

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作者单位: Chinese 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:
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.
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文件名: One-Step Hydrothermal Synthesis and Visible-Light Photocatalytic Activity of Ultrafine Cu-Nanodot-Modified TiO2 Nanotubes.pdf
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