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Featured researches published by Liang An.


Journal of Wuhan University of Technology-materials Science Edition | 2015

Polyaniline Nanotube-ZnO Composite Materials: Facile Synthesis and Application

Fang Gao; Yang Cheng; Liang An; Ruiqin Tan; Xiaomin Li; Guanghui Wang

Polyaniline nanotubes and PANI-ZnO nanocomposites were prepared by the simplified Template-Free method. The experimental results indicated that the average diameter of Polyaniline nanotubes was approximately 150-200 nm. The average crystallite size of ZnO in PANI-ZnO composites was 27 nm. Moreover, the as-prepared samples were characterized by scanning electron microscopy (SEM), FT-IR spectroscopy(FTIR) and X-ray diffraction (XRD). Photocatalytic properties of the obtained samples were investigated by the photodegradation analysis of orange II and methylene orange dye. The as-prepared PANIZnO nanocomposites exhibited much higher photocatalytic activity than pure PANI nanotubes. During 2 h photocatalytic courses under UV irradiation, the degradation ratios of Orange II and methyl orange using PANIZnO nanocomposites were 90.3% and 84.5%, respectively. Furthermore, this method can be extended to prepare other organic-inorganic semiconductor composites based composite catalysts.


Russian Journal of Physical Chemistry A | 2015

Synthesis of CdS/ZnO nanocomposite and its enhanced photocatalytic activity in degradation of methyl orange

Liang An; Guanghui Wang; Yao Cheng; Lei Zhao; Fang Gao; Yang Cheng

In this paper, a kind of CdS/ZnO nanocomposite components (CdS/ZnO) was synthesized via a two-step method. The crystal structures, chemical composition and microstructures of the resulting sample were investigated by X-ray powder diffraction (XRD), energy dispersive X-ray analysis (EDX) and fieldemission scanning electron microscopy (FE-SEM). The photocatalytic activity of the CdS/ZnO towards the degradation of methyl orange (MO) was investigated under visible light. The photocatalytic experiments with pure CdS nanoparticles (CdS) and blank test were also conducted CdS/ZnO exhibited the maximum photodegradation efficiency, which is found to be as high as 94.6% after 180 min of reaction. The reason for the enhanced photocatalytic performance was attributed to the promoted separation of photogenerated charge carriers caused by the synergy between CdS and ZnO.


Journal of Wuhan University of Technology-materials Science Edition | 2014

Preparation of polyaniline/TiO2 composite nanotubes for photodegradation of AZO dyes

Yang Cheng; Liang An; Zongshan Zhao; Guanghui Wang

Polyaniline (PANI) composite nanotubes (90–130 nm in diameter) containing titanium dioxide (TiO2) nanoparticles (about 10 nm in diameter) were synthesized through a self-assembly process in the presence of â-naphthalenesulfonic acid (â-NSA) as the dopant. It was found that PANI-TiO2 composites and PANI nanotubes both behaved with significant photocatalytic activities towards AZO dyes, during 2 h photocatalytic processes under natural light, the degradation ratio was 94.2% and 97.2% respectively (methyl orange and orange II). The morphology of such products was characterized by SEM. The specific surface area of such composite nanotubes was 14.7 m2/g compared to normal polyaniline which was 0.27 m2/g. IR and X-ray diffraction characterizations showed that the chemical chain of the composite nanotubes was identical to that of the doped PANI. It may provide a new way for photodegradation of organic contaminants by using conjugated polymer with dimensional structure.


Russian Journal of Physical Chemistry A | 2014

Recyclable Fe3O4/ZnO/PPy composite photocatalyst: Fabrication and photocatalytic activity

Liang An; Guanghui Wang; Xiaoming Shi; Min Su; Fang Gao; Yang Cheng

In this work, a magnetically separable polypyrrole (PPy) modified Fe3O4/ZnO composite photo-catalyst was synthesized and its photocatalytic activity was tested. The as-prepared Fe3O4/ZnO/PPy nanocomposite was characterized by scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectra. Furthermore, three different photocatalysts including the Fe3O4/ZnO/PPy composite were tested using methyl orange (MO) degradation reaction under UV light irradiation. The relative results demonstrated that the Fe3O4/ZnO/PPy composite has the highest photochemical activity after 4 h photocatalytic experiment. It can be easily separated using an external magnetic field. This kind of composite photocatalysts with easiness of separation can have potential applications in the treatment of water contaminated by organic pollutants.


Russian Journal of Physical Chemistry A | 2014

Preparation of Ag-loaded octahedral Bi2WO6 photocatalyst and its photocatalytic activity

Liang An; Guanghui Wang; Xuan Zhou; Yi Wang; Fang Gao; Yang Cheng

In this work, an Ag-loaded octahedral Bi2WO6 photocatalyst has been successfully prepared by the hydrothermal method and photo deposition method. X-ray diffraction (XRD), energy dispersive analysis of X-ray (EDX), field-emission scanning electron microscopy (FE-SEM) and ultra-violet adsorption spectrum (UV-Vis) were employed for characterization of the composite photocatalyst. Furthermore, two different photocatalysts including the obtained Ag-loaded octahedral Bi2WO6 were employed here for photodegradation of model contaminated water of Orange II (OII). Results show that Ag-loaded Bi2WO6 photocatalyst exhibits superior photocatalytic properties compared to the undoped Bi2WO6. The reasons for improvement in photocatalytic activity of the Ag-loaded octahedral Bi2WO6 were also discussed.


Russian Journal of Physical Chemistry A | 2015

Hexagonal pencil-like CdS nanorods: Facile synthesis and enhanced visible light photocatalytic performance

Liang An; Guanghui Wang; Lei Zhao; Yong Zhou; Fang Gao; Yang Cheng

In the present study, hexagonal pencil-like CdS nanorods have been successfully synthesized through a typical facile and economical one-step hydrothermal method without using any surfactant or template. The product was characterized by X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and energy dispersive analysis of X-ray (EDX). The results revealed that the prepared CdS photocatalyst consisted of a large quantity of straight and smooth solid hexagonal nanorods and a few nanoparticles. The photocatalytic activities of CdS nanorods and commercial CdS powders were investigated by the photodegradation of Orange II (OII) in aqueous solution under visible light, and the CdS nanorods presented the highest photocatalytic activity. Its photocatalytic efficiency enhancement was attributed to the improved transmission of photogenerated electron-hole pairs in the CdS nanostructures. The present findings may provide a facile approach to synthesize high efficient CdS photocatalysts.


Materials Research Bulletin | 2013

Facile synthesis of pompon-like ZnO-Ag nanocomposites and their enhanced photocatalytic performance

Yang Cheng; Liang An; Jing Lan; Fang Gao; Ruiqin Tan; Xiaomin Li; Guanghui Wang


Ceramics International | 2016

Controlled additive-free hydrothermal synthesis and characterization of uniform hydroxyapatite nanobelts

Liang An; Wang Li; Yong Xu; Danlin Zeng; Yang Cheng; Guanghui Wang


Research on Chemical Intermediates | 2015

Ultrasonic-assisted synthesis of visible-light-driven TiO2/Bi2O3 nanocomposite photocatalysts: characterization, properties and azo dye removal application

Liang An; Guanghui Wang; Yang Cheng; Lei Zhao; Fang Gao; Yongsheng Tian


Research on Chemical Intermediates | 2013

Simplified synthesis of polyaniline–TiO2 composite nanotubes for removal of azo dyes in aqueous solution

Yang Cheng; Liang An; Fang Gao; Guanghui Wang; Xiaomin Li; Xiaoyan Chen

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Guanghui Wang

Wuhan University of Science and Technology

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Yang Cheng

Wuhan University of Science and Technology

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Fang Gao

Wuhan University of Science and Technology

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Xiaomin Li

Wuhan University of Science and Technology

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Lei Zhao

Wuhan University of Science and Technology

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Yongsheng Tian

Wuhan University of Science and Technology

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Aiqing Zhang

South Central University for Nationalities

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Jing Lan

Qingdao Agricultural University

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Yong Xu

Wuhan University of Science and Technology

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