Synthesis of Cu-Doped Mixed-Phase TiO<sub>2</sub> with the Assistance of Ionic Liquid by Atmospheric-Pressure Cold Plasma

ZHAN Zhibin (詹志彬); DI Lanbo (底兰波); ZHANG Xiuling (张秀玲); LI Yanchun (李燕春)

doi:10.1088/1009-0630/18/5/09

Plasma Science and Technology > 2016 > 18(5): 494-499. > DOI: 10.1088/1009-0630/18/5/09

ZHAN Zhibin (詹志彬), DI Lanbo (底兰波), ZHANG Xiuling (张秀玲), LI Yanchun (李燕春). Synthesis of Cu-Doped Mixed-Phase TiO₂ with the Assistance of Ionic Liquid by Atmospheric-Pressure Cold Plasma[J]. Plasma Science and Technology, 2016, 18(5): 494-499. DOI: 10.1088/1009-0630/18/5/09

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Synthesis of Cu-Doped Mixed-Phase TiO₂ with the Assistance of Ionic Liquid by Atmospheric-Pressure Cold Plasma

1 College of Physical Science and Technology, Dalian University, Dalian 116622, China 2 Key Laboratory for Non-traditional & Functional Materials Preparation of Education Department of Liaoning Province, Dalian University, Dalian 116622, China

Funds: supported by National Natural Science Foundation of China (Nos. 21173028, 11505019), the Science and Technology Research Project of Liaoning Provincial Education Department (No. L2013464), the Scientific Research Foundation for the Doctor of Liaoning Province (No. 20131004), the Program for Liaoning Excellent Talents in University (No. LR2012042), and Dalian Jinzhou New District Science and Technology Plan Project (No. KJCX-ZTPY-2014-0001)

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Received Date: September 08, 2015

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Abstract

Abstract

An atmospheric-pressure dielectric barrier discharge (DBD) gas-liquid cold plasma was employed to synthesize Cu-doped TiO₂ nanoparticles in an aqueous solution with the assis¬tance of
[C₂MIM]BF₄ ionic liquid (IL) and using air as the working gas. The influences of the discharge voltage, IL and the amount of copper nitrite were investigated. X-ray diffraction, N₂ adsorption-desorption measurements and UV-Vis spectroscopy were adopted to characterize the samples. The results showed that the specific surface area of TiO₂ was promoted with Cu-doping (from 57.6 m ²•g^-1 to 106.2 m²•g^-1 with 3% Cu-doping), and the content of anatase was increased. Besides, the band gap energy of TiO₂ with Cu-doping decreased according to the UV-Vis spec¬troscopy test. The 3%Cu-IL-TiO₂ samples showed the highest efficiency in degrading methylene blue (MB) dye solutions under simulated sunlight with an apparent rate constant of 0.0223 min⁻¹, which was 1.2 times higher than that of non-doped samples. According to the characterization results, the reasons for the high photocatalytic activity were discussed.
- dielectric barrier discharge (DBD),
- gas-liquid cold plasma,
- atmospheric pres¬sure,
- mixed-phase TiO₂,
- Cu-doped

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