Co-reporter:Wei Deng, Wei Lan, Yaru Sun, Qing Su, Erqing Xie
Applied Surface Science 2014 Volume 305() pp:433-438
Publication Date(Web):30 June 2014
DOI:10.1016/j.apsusc.2014.03.107
Highlights
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The 3D graphene foams (GFs) were prepared by chemical vapor deposition.
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The porous CoO nanowalls were synthesized on GF by simple hydrothermal method.
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The electrode fulfills a high specific capacitance and excellent rate capabilities.
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The electrode has good cycle stability of >98% capacitances remain over 1000 cycles.
Co-reporter:Wei Deng, Yaru Sun, Qing Su, Erqing Xie, Wei Lan
Materials Letters 2014 Volume 137() pp:124-127
Publication Date(Web):15 December 2014
DOI:10.1016/j.matlet.2014.08.154
Co-reporter:Qing Su, Jiawang Zhang, Yuan Wang, Minglang Yu, Chengquan Zhu, Wei Lan, Xueqin Liu
Journal of Physics and Chemistry of Solids 2013 Volume 74(Issue 10) pp:1475-1481
Publication Date(Web):October 2013
DOI:10.1016/j.jpcs.2013.05.009
•TiO2/V2O5 nanoheterostructures with various morphologies were synthesized.•The optimum annealing temperature for V2O5/TiO2 nanoheterostructures is 400 °C.•The optimum V/Ti molar ratio for V2O5/TiO2 nanoheterostructures is 1:1.•The relation between morphology and photocatalytic efficiency was proposed.The V2O5/TiO2 nanoheterostructures with various morphologies were prepared by typical one-step electrospinning process. The effect of annealing temperatures and V/Ti molar ratio on the visible light photocatalytic activity of V2O5/TiO2 nanoheterostructures was investigated by photodegradation of the Rhodamine B (RhB). The experimental results indicated that the annealing temperature and V/Ti molar ratios were important factors for the morphology of samples which influenced the number of efficient V2O5/TiO2 nanoheterostructure. The V2O5/TiO2 nanoheterostructures annealed at 400 °C with the V/Ti molar ratio of 1:1 exhibited the highest photocatalytic efficiency. Beyond 400 °C, the growth of V2O5 grains enhanced and big V2O5 rods formed on the V2O5/TiO2 nanofibers, so the efficient V2O5/TiO2 nanoheterostructures decreased, leading to the lower photocatalytic efficiency. The lower or higher V/Ti molar ratio could decrease the number of efficient V2O5/TiO2 nanoheterostructures, which reduced the photocatalytic activity.
Co-reporter:Minglang Yu, Xueqin Liu, Yuan Wang, Youbin Zheng, Jiawang Zhang, Mingyang Li, Wei Lan, Qing Su
Applied Surface Science 2012 Volume 258(Issue 24) pp:9554-9558
Publication Date(Web):1 October 2012
DOI:10.1016/j.apsusc.2012.05.120
Abstract
Vanadium oxide nanotubes (VONTs) were synthesized using the V2O5 powder as precursor with dodecylamine as structure-directing template via one-step hydrothermal way. The prepared VONTs sensors exhibit excellent sensing sensitivity and superior recovery property in detecting ethanol vapor. The response to the ethanol vapor and NO2 gases confirms that the samples are of p-type behavior at 80 °C, which is associated with the presence of the protonated amine molecules in the VONTs. The sample changes to n-type behavior at 260 °C arising from the decomposition of the protonated amine molecules. The p-type VONTs have potential for development of a novel gas sensor.
Co-reporter:Yuan Wang, Jiawang Zhang, Lixin Liu, Chengquan Zhu, Xueqin Liu, Qing Su
Materials Letters 2012 Volume 75() pp:95-98
Publication Date(Web):15 May 2012
DOI:10.1016/j.matlet.2012.01.074
The V2O5/TiO2 nanoheterostructures with high photocatalytic activity in visible light region are synthesized via electrospinning directly. Photodecomposition rate of RhB by V2O5/TiO2 nanoheterostructures is much faster than that using of pure TiO2 nanofibers. Furthermore, the influence of V/Ti molar rate on visible light photocatalysis is studied. Experimental results indicate that optimum V/Ti molar rate of V2O5/TiO2 nanoheterostructures is found to be about 1:1. It can be attributed to the fewer efficient V2O5/TiO2 heterostructures formed in the V2O5/TiO2 nanofibers when the V/Ti molar rates deviate from 1:1. In addition, the V2O5/TiO2 nanoheterostructures show excellent photocatalytic stability after 10 cycles under visible light irradiation.Highlights► Visible light photocatalysis of V2O5/TiO2 nanoheterostructures. ► The products have high photocatalytic activity and excellent photocatalytic stability. ► The products with V/Ti molar rate of 1:1 has the best photocatalytic degradation activity.
