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Dive into the research topics where Shijie Dong is active.

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Featured researches published by Shijie Dong.


Journal of Hazardous Materials | 2012

Enhancing the photocatalytic properties of TiO2 by coupling with carbon nanotubes and supporting gold.

Huihu Wang; Shijie Dong; Ying Chang; Joaquim L. Faria

The photodegradation of methylene blue in aqueous solutions is studied using various photocatalysts, including neat TiO(2), CNT-TiO(2), Au-TiO(2), and Au-CNT-TiO(2) composites MB. Materials were synthesized and extensively characterized by XRD, TEM, DRFIT spectroscopy, N(2) adsorption-desorption isotherms, as well as diffuse reflectance UV-vis spectroscopy. By using CNT-TiO(2) composite as catalysts, it was found that CNT act as adsorbent and photosensitizer to improve the photoactivity of neat TiO(2). Among the CNT-TiO(2) composites with different CNT weight ratio (0.2-20%), the 2%CNT-TiO(2) shows the best photoactivity. When CNT content is larger than 2%, the surplus CNT may absorb and scatter light photons. Combined with the decrease of TiO(2) amount in composite, the photoactivity is reduced. To further improve the photoactivity of 2%CNT-TiO(2), different Au loads varying from 0.25% to 1% were introduced by the deposition-precipitation method. The 0.25%Au-2%CNT-TiO(2) composite had the highest photoactivity. The increase in activity was explained by the surface plasmon resonance of Au that makes the composite to absorb more photons than the 2%CNT-TiO(2), thus overcoming the disadvantages of surplus CNT addition. On the other hand, 0.25%Au-2%CNT-TiO(2) composite also presents higher activity than 0.25%Au-TiO(2) due to higher adsorption capacity provided by CNT introduction. The addition of CNT and Au simultaneously has a much stronger synergic role than when each of them is introduced individually.


RSC Advances | 2016

Photochemical preparation of the ternary composite CdS/Au/g-C3N4 with enhanced visible light photocatalytic performance and its microstructure

Daluo Peng; Huihu Wang; Kun Yu; Ying Chang; Xinguo Ma; Shijie Dong

A ternary composite photocatalyst CdS/Au/g-C3N4 was synthesized by a facile two-step photoreduction method. In this hybrid structure, CdS nanoparticles and CdS@Au core–shell nanoparticles are homogeneously deposited on the surface of g-C3N4 to produce two different structures CdS–g-C3N4 and CdS@Au–g-C3N4. The microstructure analysis results of the composition, chemical states, and optical properties of as-prepared ternary hybrid reveal that a strong interaction exists between CdS nanoparticles, CdS@Au nanoparticles and the g-C3N4 bulk. The ternary composite CdS/Au/g-C3N4 exhibits significantly enhanced photocatalytic activity for RhB degradation under visible light irradiation compared with the binary composites CdS/g-C3N4, Au/g-C3N4 and pure g-C3N4. Meanwhile, CdS/Au/g-C3N4 also demonstrates good photostability in the recycling test of RhB degradation. The active species in the photocatalytic reaction over CdS/Au/g-C3N4 are detected as O2˙− and h+. The superior photocatalytic performance of CdS/Au/g-C3N4 should be attributed to the enhanced separation efficiency of photogenerated electrons–holes induced by the formed heterojunctions CdS–g-C3N4 and Z-scheme structure CdS@Au–g-C3N4 where Au nanoparticles serve as electrons mediator.


Journal of Advanced Ceramics | 2013

Theoretical calculation and analysis of ZrO 2 spherical nanometer powders

Ying Chang; Huihu Wang; Qinbiao Zhu; Ping Luo; Shijie Dong

ZrO2 spherical nanometer powders containing 3.5 mol% Y2O3 have been prepared via the coupling route of water/oil (W/O) emulsion with dimethyl oxalate homogenous precipitation. ZrO2 powders and their precursor powders have been characterized by XRD, TEM and SEM. According to the XRD result, phase volume fractions of powders were calculated by comparing the peaks’ intensities of spectrum. Furthermore, phase crystal lattice constants were obtained using crystal interplanar spacing formula and Bragg equation. With these results, the theoretical density of powders was analyzed. Finally, powders’ spherical degree was revealed via the method of comparison between theoretical density and actual density.


Transactions of Nonferrous Metals Society of China | 2016

Effects of low melting point metals (Ga, In, Sn) on hydrolysis properties of aluminum alloys

Fanqiang Wang; Huihu Wang; Jian Wang; Jia Lu; Ping Luo; Ying Chang; Xin-guo Ma; Shijie Dong

Abstract Low melting point metals (Ga, In, Sn) as alloy elements were used to prepare Al–In–Sn and Al–Ga–In–Sn alloys through mechanical ball milling method. The effects of mass ratio of In to Sn and Ga content on the hydrolysis properties of aluminum alloys were investigated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) with energy disperse spectroscopy (EDS) were used to analyze the compositions and morphologies of the obtained Al alloys. The results show that the phase compositions of Al–In–Sn ternary alloys are Al and two intermetallic compounds, In 3 Sn and InSn 4 . All Al–In–Sn ternary alloys exhibit poor hydrolysis activity at room temperature. Al–In–Sn alloy with the mass ratio of In to Sn equaling 1:4 has the highest hydrogen yield. After Ga is introduced to the ternary alloys, the hydrolysis activity of aluminum alloys at room temperature is greatly improved. It is speculated that the addition of Ga element promotes the formation of defects inside the Al alloys and Ga–In 3 Sn–InSn 4 eutectic alloys on the alloys surface. Al atoms can be dissolved in this eutectic phase and become the active spots during the hydrolysis process. The small size and uniform distribution of this eutectic phase may be responsible for the enhancement of hydrolysis activity.


RSC Advances | 2017

Effect of post-heat treatment on the photocatalytic activity of titanium dioxide nanowire membranes deposited on a Ti substrate

Ying Chang; Chonggang Wu; Huihu Wang; Yan Xiong; Yuan Chen; Kai Ke; Yao He; Shijie Dong

Titanium dioxide nanowire membranes have been synthesized by a hydrothermal growth on the surfaces of Ti substrates in a 12 M NaOH aqueous solution at 160 °C for 24 h, followed by ion-exchange with 0.5 M HCl aqueous solution and subsequent heat treatment such as calcination or a second hydrothermal treatment. The as-prepared TiO2 nanowires as well as their precursor were characterized by field emission scanning electron microscopy (FE-SEM), thermogravimetry-differential thermal analysis (TG-DTA), X-ray diffraction (XRD), the Brunauer–Emmett–Teller (BET) method, ultraviolet-visible (UV-Vis) spectrophotometry, transmission electron microscopy (TEM) and energy dispersive X-ray (EDX) spectrometry. FE-SEM observations indicated that the TiO2 nanowires were 50–250 nm in diameter and up to several dozens of microns in length. TG-DTA and XRD results demonstrated that the crystalline phases of the nanowires obtained from calcinations of their precursor at different temperatures above 350 °C consisted mostly of anatase. BET, UV-Vis, TEM and EDX results showed that the nanowires obtained upon calcination of their precursor at 550 °C had the greatest degradation efficiency for Rhodamine-B, and that, at the same temperature of 250 °C, the hydrothermal treatment process of TiO2-precursor nanowires had a more significant effect on the photocatalytic activity of the resulting TiO2 nanowires than the calcination.


International Journal of Hydrogen Energy | 2013

Investigation on hydrogen production using multicomponent aluminum alloys at mild conditions and its mechanism

Huihu Wang; Ying Chang; Shijie Dong; Zhifeng Lei; Qingbiao Zhu; Ping Luo; Zhixiong Xie


Applied Surface Science | 2012

Microstructures and photocatalytic properties of porous ZnO films synthesized by chemical bath deposition method

Huihu Wang; Shijie Dong; Ying Chang; Xiaoping Zhou; Xinbin Hu


Ceramics International | 2014

Preparation, characterization and photocatalytic performance of g-C3N4/Bi2WO6 composites for methyl orange degradation

Huihu Wang; Jia Lu; Fanqiang Wang; Wenhao Wei; Ying Chang; Shijie Dong


Materials Science and Engineering B-advanced Functional Solid-state Materials | 2012

Mesoporous Au/TiO2 composites preparation, characterization, and photocatalytic properties

Huihu Wang; Joaquim L. Faria; Shijie Dong; Ying Chang


Physica E-low-dimensional Systems & Nanostructures | 2016

Synthesis and properties of Au/ZnO nanorods as a plasmonic photocatalyst

Jia Lu; Huihu Wang; Daluo Peng; Tao Chen; Shijie Dong; Ying Chang

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Huihu Wang

Hubei University of Technology

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Ying Chang

Hubei University of Technology

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Ping Luo

Hubei University of Technology

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Bei Liu

Hubei University of Technology

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Daluo Peng

Hubei University of Technology

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Kuanhe Du

Hubei University of Technology

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Chonggang Wu

Hubei University of Technology

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Jia Lu

Hubei University of Technology

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Ming Yan

Hubei University of Technology

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Xiaoping Zhou

Hubei University of Technology

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