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Dive into the research topics where Bingkun Liu is active.

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Featured researches published by Bingkun Liu.


Environmental science. Nano | 2017

Visible-light-driven TiO2/Ag3PO4 heterostructures with enhanced antifungal activity against agricultural pathogenic fungi Fusarium graminearum and mechanism insight

Bingkun Liu; Yongfei Xue; Jingtao Zhang; Bing Han; Jie Zhang; Xinying Suo; Lilong Mu; Hengzhen Shi

A series of TiO2/Ag3PO4 heterostructures were fabricated via a facile in situ precipitation process. The as-synthesized composites were found to exhibit markedly enhanced photocatalytic inactivation of E. coli under visible light irradiation compared with bare TiO2 and Ag3PO4 owing to the improved light absorption and the efficient separation of photo-induced electron–hole pairs. Moreover, the antifungal activity of the composite materials was studied against the phytopathogen Fusarium graminearum (one of the main pathogens of wheat). With 100 min of visible light illumination, the TiO2/Ag3PO4 composite reduced the survival ratio of the F. graminearum macroconidia to about 2%. The photocatalytic disinfection mechanism of the macroconidia was attributed to the damage to their cell wall/membrane caused by the attack of reactive oxygen species as demonstrated by fluorescence staining. In addition, ESR measurement revealed that hydroxyl radicals were the predominant active species in the photocatalytic disinfection system. Our results suggest that this hybrid photocatalyst has great potential as an environmentally-friendly alternative method to disinfect plant pathogens for agricultural areas.


Journal of Materials Science: Materials in Electronics | 2018

Synthesis of g-C 3 N 4 /BiOI/BiOBr heterostructures for efficient visible-light-induced photocatalytic and antibacterial activity

Bingkun Liu; Xiaole Han; Yu Wang; Xin Fan; Zhuoyue Wang; Jingtao Zhang; Hengzhen Shi

Visible-light-driven g-C3N4/BiOI/BiOBr composite photocatalysts were successfully synthesized by a facile deposition precipitation method. The as-prepared samples have been characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and ultraviolet–visible absorption spectroscopy (UV–vis). The photocatalytic experiments indicate that the g-C3N4/BiOI/BiOBr composites possess enhanced photocatalytic activity towards the degradation of methyl orange (MO), and killing Escherichia coli. Photoluminescence (PL) spectra reveal that the introduction of g-C3N4 could efficiently promote the separation efficiency of photo-induced charge carriers in the composites. The radical trapping experiment and ESR analysis confirmed that the active species ·O2−, h+ and ·OH are the reactive oxygen species in the photocatalytic process. Our results suggest that the g-C3N4/BiOI/BiOBr composite photocatalysts can be used in water treatment of degrading the organic pollutants and killing the water bacteria at the same time.


Journal of Materials Science: Materials in Electronics | 2018

Facile synthesis of g-C3N4/amine-functionalized MIL-101(Fe) composites with efficient photocatalytic activities under visible light irradiation

Bingkun Liu; Yajun Wu; Xiaole Han; Jihong Lv; Jingtao Zhang; Hengzhen Shi

Abstractg-C3N4/NH2-MIL-101(Fe) composites are successfully fabricated by a facile in situ solvothermal method. The as-prepared samples have been characterized by XRD, FTIR, XPS, FESEM, TEM, DRS and PL analysis. Under visible light irradiation, the g-C3N4/NH2-MIL-101(Fe) composite shows higher photocatalytic activities than bare g-C3N4 and NH2-MIL-101(Fe) for Cr(VI) reduction and MO degradation. The improved photocatalytic performances are ascribed to the efficient charge separation and transfer on the interface between g-C3N4 and NH2-MIL-101(Fe). Control experiments show that the pH value is vital for Cr(VI) reduction, and meanwhile, the addition of hole scavengers promotes the photocatalytic reduction significantly. Finally, a possible reaction mechanism had also been investigated in detail.


Journal of Hazardous Materials | 2018

Carbon dots-decorated Na2W4O13 composite with WO3 for highly efficient photocatalytic antibacterial activity

Jingtao Zhang; Xing Liu; Xueying Wang; Lilong Mu; Mingming Yuan; Bingkun Liu; Hengzhen Shi

Photodisinfection by semiconductors has been proven to be an effective method for achieving antibacterial or antifungal activity. However, the toxicity of the nanomaterial to the environment and organisms is a major concern. Herein, a highly efficient and environmentally friendly photodisinfection material of a carbon dots (CDs) decorated Na2W4O13 composite with WO3 photocatalyst was fabricated via a facile hydrothermal-calcination approach. The TEM (transmission electron microscopy) images showed that CDs decorated the surface of the Na2W4O13 flakes. Compared with the samples without incorporated CDs, the as-synthesized composite of CDs/Na2W4O13/WO3 exhibited excellent antimicrobial activity against E. coli under visible light illumination. Electron spin resonance (ESR) spectroscopy and reactive species scavenging experiments revealed that the hydroxyl radicals and superoxide radical anions played the most important role in the photocatalytic bacterial inactivation. Furthermore, the cytotoxicity of the CDs/Na2W4O13/WO3 composite was evaluated by analyzing the viability of HepG2 and Chinese hamster lung (V79) cells using Cell Counting Kit-8 (CCK-8).


Journal of Materials Science: Materials in Electronics | 2016

Luminescence properties of a novel single-phase white-emitting phosphor based on Dy3+ doped strontium tetraphosphate

Bing Han; Bingkun Liu; Jie Zhang; Hengzhen Shi

A series of novel single-phase white-emitting phosphors based on Dy3+ doped strontium tetraphosphate (Sr3P4O13:Dy3+) have been synthesized successfully via a conventional solid-state reaction at high temperature, and characterized by X-ray diffraction, photoluminescence excitation/emission spectra and decay curves. The optimum doping concentration of Dy3+ in Sr3P4O13 was ascertained by investigating the influence of the doping concentration of Dy3+ on the emission intensity of Dy3+, in which the content of Dy3+ did not change the shape and position of emission spectra except for emission intensity. Meanwhile, the critical distance and concentration quenching mechanism were also calculated and confirmed. Furthermore, the decay time was also determined for Sr3P4O13:Dy3+ phosphors with various concentrations of Dy3+, and decreases gradually with increasing Dy3+ concentration. The as-prepared Sr3P4O13:Dy3+ phosphors could be excited by near ultraviolet, and exhibit white-light emission with short decay time of milliseconds, indicating these phosphors could exhibit certain potential as single-phase white-light-emitting phosphors for application in display and lighting regions (e.g. white light-emitting-diodes).


Applied Surface Science | 2017

Fabrication of TiO2/Ag2O heterostructure with enhanced photocatalytic and antibacterial activities under visible light irradiation

Bingkun Liu; Lilong Mu; Bing Han; Jingtao Zhang; Hengzhen Shi


Materials Letters | 2016

Ce3+→Tb3+ energy transfer induced emission-tunable properties of Ba3La(PO4)3:Ce3+,Tb3+ phosphors

Bing Han; Jingtao Zhang; Bingkun Liu; Jie Zhang; Hengzhen Shi


Electrochimica Acta | 2016

Study on photo-induced charge transfer in the heterointerfaces of CuInS2/CdS co-sensitized mesoporous TiO2 photoelectrode

Bingkun Liu; Yongfei Xue; Jingtao Zhang; Dejun Wang; Tengfeng Xie; Xinying Suo; Lilong Mu; Hengzhen Shi


Optik | 2017

Luminescence properties of novel Ba2MgWO6:Eu3+ and g-C3N4/Ba2MgWO6:Eu3+ phosphors

Bing Han; Bingkun Liu; Jie Zhang; Hengzhen Shi


Materials Letters | 2017

Facile synthesis of Ag/AgCl/TiO2 plasmonic photocatalyst with efficiently antibacterial activity

Jingtao Zhang; Xing Liu; Xinying Suo; Pengju Li; Bingkun Liu; Hengzhen Shi

Collaboration


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Hengzhen Shi

Zhengzhou University of Light Industry

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Jingtao Zhang

Zhengzhou University of Light Industry

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Bing Han

Zhengzhou University of Light Industry

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Jie Zhang

Zhengzhou University of Light Industry

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Lilong Mu

Zhengzhou University of Light Industry

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Xinying Suo

Zhengzhou University of Light Industry

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Yongfei Xue

Zhengzhou University of Light Industry

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Xing Liu

Zhengzhou University of Light Industry

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Pengju Li

Zhengzhou University of Light Industry

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