Ping Chen

Anhui University, Luchow, Anhui Sheng, China

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Publications (23)102.67 Total impact

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    ABSTRACT: The CdS sensitized N-TiO2 (CdS-N-TiO2) inverse opals films were prepared by a sol-gel method integrated with successive ionic layer adsorption and reaction (SILAR). In order to harvest the visible sunlight and enhance the photocurrent, photosensitization of CdS (narrow-bandgap semiconductor) and nitrogen doping are used to couple with TiO2 inverse opals. The good visible light absorption ability and significant increase of photoresponse of CdS-N-TiO2 inverse opals films have been observed compared to TiO2 or N-TiO2 inverse opals films. A promising photocurrent density of 0.83 mA/cm2 has been achieved for the CdS-N-TiO2 inverse opal as photoanode at 1.23 mV versus reversible hydrogen electrode (RHE) bias under simulated solar-light illumination. Because the synergistic effect of CdS sensitization and N-doping with periodically ordered inverse opal nanostructures, the photocurrent density is enhanced in comparison to the pristine TiO2 inverse opals films.
    Electrochimica Acta 11/2014; 146:378–385. · 4.09 Impact Factor
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    ABSTRACT: Catalysts for oxygen reduction reaction (ORR) are crucial in fuel cells. Developing metal-free catalyst with high activity at low-cost and high-volume production remains a great challenge. Here, we report a kind of nitrogen-doped nanoporous carbon nanosheets derived from a conveniently available and accessible plant Typha orientalis. The materials have high surface area (the highest surface area can be 898 m2 g−1), a number of micropores and high content of nitrogen atom (highest content of 9.1 at.%). Typical product exhibits an unexpected, surprisingly high ORR activity. In alkaline media, it exhibits similar catalytic activity but superior tolerance to methanol to commercial 20% Pt/C. In acidic media, it also shows excellent catalytic ability, stability and tolerance to methanol. This low-cost, simple and readily scalable approach provides a straightforward route to synthesize excellent electrocatalyst directly from biomass, which may find broad applications in the fields of supercapacitors, sensors, gas uptake and so on.
    Energy & Environmental Science 10/2014; · 11.65 Impact Factor
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    ABSTRACT: Nitrogen-doped graphene aerogels-supported NiS2 nanoparticles (NiS2/NG) were synthesized by a one-pot hydrothermal method. In the process, l-cysteine was used not only as the nitrogen source to form the nitrogen-doped graphene aerogels, but also the sulfur source to form NiS2. The nitrogen-doped graphene (NG) hybrids show an interconnected reticulation of NG sheets with uniform deposition of NiS2 NPs, and the NiS2 NPs are deposited on the NG layers. In studying the effects of the NG and NiS2/NG for the ORR, we found that NiS2/NG shows a more positive onset potential, higher current density, and higher electron transfer number (∼4) for the oxygen-reduction reaction (ORR) in alkaline media than NG. Furthermore, NiS2/NG shows better durability and methanol tolerance than the commercial Pt/C catalyst.
    Journal of Nanoparticle Research 03/2014; 16(3). · 2.18 Impact Factor
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    ABSTRACT: Large-scale one-step synthesis of novel teeth-like hierarchical architecture polyaniline (PANI)/lead tungstate (PbWO4) nanocomposites has been achieved from aqueous solution by in situ polymerization at room temperature. The reaction conditions, such as pH value and the molar ratio, are found to play a crucial role in controlling the size and morphology of the products. The model of “nucleation-growth-assembly” is proposed to explain formation mechanism of the teeth-like PANI/PbWO4 nanocomposites. Interestingly, the larger size and higher crystallinity are beneficial to the improvement of photoluminescence (PL) intensity. POLYM. COMPOS., 35:516–522, 2014. © 2013 Society of Plastics Engineers
    Polymer Composites 03/2014; 35(3). · 1.48 Impact Factor
  • Journal of Nanoparticle Research 02/2014; 16(2):2311. · 2.18 Impact Factor
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    ABSTRACT: Co/Co3O4/C-N electrocatalyst: A novel nanostructure of an interconnected nitrogen-doped carbon framework with Co/Co3O4 nanoparticles was prepared. It shows excellent catalytic ability, stability and tolerance to methanol poisoning effects in the alkaline media for the oxygen reduction reaction.
    Nano Energy. 01/2014;
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    ABSTRACT: A novel inorganic/organic hybrid hydrogel system containing titanium dioxide (TiO2)/poly (ethylene glycol) double acrylates (PEGDA) was prepared by in situ photopolymerization on tumor cells for photodynamic therapy (PDT). TiO2 nanorods with diameter of ~5 nm and length of ~25 nm in this system presented dual functions, as effective photosensitizers for PDT and initiators for causing the in situ formation of hydrogel, under near-infrared (NIR) irradiation. The hybrid hydrogel retained the TiO2 around tumor cell to form a drug-loaded hydrogel shell. This resulted in a high concentration of singlet oxygen (1O2) under NIR irradiation, which induced apoptosis of tumor cell. Also, the hydrogel could reduce the side effects by preventing TiO2 from migrating to normal tissue. Furthermore, the TiO2 nanorods in this hydrogel shell were photochemically recyclable and could be reused in regular treatment. The outcomes of this study provide a new way to exploit multifunction of inorganic semiconductor nanomaterials for a variety of bio-medical applications.
    ACS Applied Materials & Interfaces 11/2013; · 5.90 Impact Factor
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    ABSTRACT: The Fe3O4@C core/shell microspheres were fabricated via a two-step process. Fe3O4 microspheres were firstly prepared, and Fe3O4@C core/shell microspheres were subsequently fabricated using glucose as a carbon source by a hydrothermal route, in which the thickness of the carbon coating was about 20 nm. The resulting products were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectra (FTIR). The Nitrogen adsorption–desorption isotherms reveal their mesoporous structure and larger BET surface area (62.3 m2g-1). The Fe3O4@C core/shell microspheres possess ferromagnetism and high saturation magnetization (39.2 emu ⋅ g-1). Bovine hemoglobin (BHb) was used as a model protein to test the adsorption and desorption properties of the Fe3O4@C core/shell microspheres. The capacity for BHb adsorption was more than 71.3 mg/g. According to the values obtained in the MTT (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide) assay the Fe3O4@C core/shell microspheres show a low toxicity. Therefore, the prepared Fe3O4@C core/shell microspheres are of great significance for guided site-specific drug delivery.
    Nano brief reports and reviews 07/2013; 08(04). · 1.17 Impact Factor
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    ABSTRACT: A new kind of nitrogen-doped graphene/carbon nanotube nanocomposite can be synthesized by a facile hydrothermal process under mild conditions, which exhibits synergistically enhanced electrochemical activity for the oxygen reduction reaction. This research provides a new route to access a metal-free electrocatalyst with a high activity under mild conditions.
    Advanced Materials 05/2013; · 14.83 Impact Factor
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    ABSTRACT: Nitrogen-doped graphene has been a recent research focus. It is crucial to further utilize the excellent properties of graphene macroscopic assemblies. Herein, we first report a unique and convenient hydrothermal process for controlled synthesis and structural adjustment of the nitrogen-doped graphene hydrogel (GN-GH), which can be readily scaled-up for mass production of nitrogen-doped graphene hydrogel by using organic amine and graphene oxide as precursors. The organic amine is not only as nitrogen sources to obtain the nitrogen-doped graphene but also as an important modification to control the assembly of graphene sheets in the 3D structures. Inner structure of the GN-GHs and the content of nitrogen in the graphene are easily adjusted by organic amine. Interestingly, it has been found that the supercapacitor performance of the typical product could be remarkably enhanced. Even at an ultrafast charge/discharge rate of 185.0 A/g, a high power density of 205.0 kW/kg can be obtained. In addition, at a current density of 100.0 A/g, 95.2% of its capacitance was retained for 4000 cycles. The present nitrogen-doped graphene hydrogels may have potential applications as ultrahigh power density capacitors in the vehicle, lift and the other devices at high rates.
    Nano Energy. 03/2013; 2(2):249–256.
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    ABSTRACT: Supercapacitors (also known as ultracapacitors) are considered to be the most promising approach to meet the pressing requirements of energy storage. Supercapacitive electrode materials, which are closely related to the high-efficiency storage of energy, have provoked more interest. Herein, we present a high-capacity supercapacitor material based on the nitrogen-doped porous carbon nanofibers synthesized by carbonization of macroscopic-scale carbonaceous nanofibers (CNFs) coated with polypyrrole (CNFs@polypyrrole) at an appropriate temperature. The composite nanofibers exhibit a reversible specific capacitance of 202.0 F g(-1) at the current density of 1.0 A g(-1) in 6.0 mol L(-1) aqueous KOH electrolyte, meanwhile maintaining a high-class capacitance retention capability and a maximum power density of 89.57 kW kg(-1). This kind of nitrogen-doped carbon nanofiber represents an alternative promising candidate for an efficient electrode material for supercapacitors.
    ACS Nano 07/2012; 6(8):7092-102. · 12.03 Impact Factor
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    ABSTRACT: Nitrogen-doped graphene (GN) has great potential applications in many fields because doping with nitrogen can alter the electrical properties of graphene. It is still a challenge to develop a convenient method for synthesis of GN sheets. In this paper, we first report the synthesis of a nitrogen-doped graphene/ZnSe nanocomposite (GN-ZnSe) by a one-pot hydrothermal process at low temperature using graphene oxide nanosheets and [ZnSe](DETA)(0.5) nanobelts as precursors. ZnSe nanorods composed of ZnSe nanoparticles were found to deposit on the surface of the GN sheets. The results demonstrated that [ZnSe](DETA)(0.5) nanobelts were used not only as the source of ZnSe nanoparticles but also as the nitrogen source. Interestingly, it was found that the as-prepared nanocomposites exhibit remarkably enhanced electrochemical performance for oxygen reduction reaction and photocatalytic activities for the bleaching of methyl orange dye under visible-light irradiation. This facile and catalyst-free approach for depositing ZnSe nanoparticles onto the graphene sheets may provide an alternative way for preparation of other nanocomposites based on GN sheets under mild conditions, which show their potential applications in wastewater treatment, fuel cells, energy storage, nanodevices, and so on.
    ACS Nano 12/2011; 6(1):712-9. · 12.03 Impact Factor
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    ABSTRACT: In this paper, we report the fabrication of carbonaceous nanofiber (CNF) membranes functionalized by beta-cyclodextrins (CNF-β-CD membrane) and their application for molecular filtration. The chemically synthesized carbonaceous nanofibers were first functionalized by β-CD, and the free-standing CNF membrane can be prepared by a simple filtration process. The membrane shows a remarkable capability to function as an ideal molecular filter through complexation of phenolphthalein molecules with the cyclodextrin molecules grafted on the CNFs. As a typical dye pollutant, fuchsin acid can also be effectively removed from the solution through such a membrane. Engineering the surface of this carbonaceous nanofiber membrane may allow it to be used for other applications such as chiral separation and drug delivery.
    ACS Nano 06/2011; 5(7):5928-35. · 12.03 Impact Factor
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    ABSTRACT: In this article, a new synthetic method of nanoparticles with fresh Chinese gooseberry juice (CGJ) as bio-template was developed. One-step synthesis of highly water-soluble silver nanoparticles at room temperature without using any harmful reducing agents and special capping agent was fulfilled with this method. In the process, the products were obtained by adding AgNO3 to CGJ, which was used as reducing agent, capping agent, and the bio-template. The products of silver nanoparticles with diameter of 10–30nm have strong water solubility and excellent antibiotic function. With the same concentration 0.047μgmL−1, the antibacterial effect of water-soluble silver particles by fresh CGJ was 53%, whereas only 27% for silver nanoparticles synthesized using the template method of fresh onion inner squama coat (OISC). The excellent water solubility of the products would enable them have better applications in the bio-medical field. The synthetic method would also have potential application in preparing other highly water-soluble particles, because of its simple apparatus, high yield, mild conditions, and facile operation. KeywordsBio-template–Nanoparticles–Chinese gooseberry juice–Water-soluble silver
    Journal of Nanoparticle Research 01/2011; 13(10):5347-5353. · 2.18 Impact Factor
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    ABSTRACT: In order to improve both safety and efficacy of cancer chemotherapy of titanocene dichloride and overcome the shortcomings such as instability and short half-life in the human body, we report a controlled release system of titanocene dichloride by electrospun fiber and its in vitro antitumor activity against human lung tumor spca-1 cells. The system was developed by electrospinning. The release profiles of titanocene dichloride in PBS were researched by UV-Vis spectrophotometer. In vitro antitumor activities of the fibers were examined by MTT method. Titanocene dichloride was well incorporated in biodegradable poly(L-lactic acid) fibers. XRD results suggest that titanocene dichloride exists in the amorphous form in the fibers. The controlled release of titanocene dichloride can be gained for long time. MTT showed actual titanocene dichloride content 40, 80, 160 and 240 mg/L from the fibers mat, cell growth inhibition rates of 11.2%, 22.1%, 44.2% and 68.2% were achieved, respectively. The titanocene dichloride released has obvious inhibition effect against lung tumor cells. The system has an effect of controlled release of titanocene dichloride and may be used as an implantable anticancer drug in clinical applications in the future.
    European journal of pharmaceutics and biopharmaceutics: official journal of Arbeitsgemeinschaft fur Pharmazeutische Verfahrenstechnik e.V 11/2010; 76(3):413-20. · 3.15 Impact Factor
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    ABSTRACT: AbstractThis article describes a facile green strategy for preparing the Ni(OH)2 microsphere assembled by nanoribbons by the template of the squama inner coat of onion at mild condition. The method is simple and effective. The results of SEM show the products are Ni(OH)2 microspheres with diameters in the range of 500–2,500nm. The results of TEM show the microsphere is assembly by nanoribbons, with thickness in the range of 30–50nm. The products were characterized by powder X-ray diffraction, IR, and thermogravimetric analysis. A possible formation mechanism was also proposed. Graphical AbstractThis paper describes a facile green strategy for preparing the Ni(OH)2 microspheres assembly by nanoribbons by the template of the squama inner coat of onion at mild condition. KeywordsTemplate-Ni(OH)2 -Microspheres-Nanoribbons-Synthesis-Onion-Batteries-Energy storage
    Journal of Nanoparticle Research 01/2010; 12(5):1561-1566. · 2.18 Impact Factor
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    ABSTRACT: In this paper, a new controlled release system of superoxide dismutase was developed by electrospun composite fibers. Highly loading efficacy of sod from 85.6 to 98.0% was achieved. The superoxide dismutase can be released from the system for 234 h, and obvious initial burst release of superoxide dismutase in vitro was not observed. In vitro release rate of superoxide dismutase in the first 66 h basically is faster than the corresponding rate at a later stage. Antioxidant activity of the released superoxide dismutase was still high, and it remained stable during the preparation by electrospinning and release experiment. We hope this composite system be used as an implanted form, in the treatment for several disease involved with the superoxide radical in the future.
    Journal of Materials Science Materials in Medicine 11/2009; 21(2):609-14. · 2.14 Impact Factor
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    ABSTRACT: Dumbbell-like nanosuperstructures of (3-carboxy-1-acyl-propyl)-ferrocene were successfully prepared by ultrasonic–pHcontrolling–reprecipitation method. The scanning electron microscope shows that as-obtained products were composed of nanorods. The length of the products is about 6–12μm, the diameter of the two polar coronas and the middle part (waist) are respectively about 2–8μm and 0.5–2μm. The diameter of the nanorods that are the basic unit of the superstructures, is about 0.3μm. X-ray diffraction analysis of the products indicated that the superstructures keep original crystal structure. The optical properties of the products were characterized by FT-IR spectrometer and UV spectrometer, and they display quantum size effect. This paper provides a novel method that has potential application in preparing other organometallic compounds superstructures, and more importantly, the as-obtained superstructures have widely applications. The possible mechanism was also proposed.
    Journal of Organometallic Chemistry 01/2009; 694(1):21-26. · 2.00 Impact Factor
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    ABSTRACT: In this article, multi-armed nanorods and nanochains of semiconductor selenium were simultaneously synthesised through living bio-membrane bi-templates of garlic at room temperature. The multi-armed nanorods are 60–80 nm in diameter and 1.0–1.5 µm in length; the nanochains are made of a series of nanospheres and each nanosphere is 100–150 nm in its diameter. The X-ray diffraction pattern indicates that these nanocrystals were crystallised in the hexagonal structure and were of high purity. The possible formation mechanism is investigated in the article. It is expected the method reported here can be easily adapted to any future preparation of low-dimension nanomaterials.
    Journal of Experimental Nanoscience 09/2008; 3(3):215-221. · 0.88 Impact Factor
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    ABSTRACT: This paper describes a novel and facile method for preparing the heavy metal MS (M=Ag, Cd and Pb) nanoparticles by bio-template of the squama inner coat of onion. Ag2S nanoparticles exhibit a diameter distribution in the range of 10–20 nm. CdS hollow nanoparticles exhibit a diameter distribution in the range of 85–100 nm. PbS nanoparticles with diameters in the range of 7–10 nm can also be prepared. Because of simple operation and mild conditions this method will have potential application in synthesizing nanoscale materials.
    Materials Letters - MATER LETT. 01/2008; 62(17):3254-3257.

Publication Stats

98 Citations
102.67 Total Impact Points

Institutions

  • 2014
    • Anhui University
      • School of Chemistry and Chemical Engineering
      Luchow, Anhui Sheng, China
  • 2011–2013
    • University of Science and Technology of China
      • Department of Chemistry
      Luchow, Anhui Sheng, China
    • Chizhou University
      Kuei-ch’ih, Anhui Sheng, China
  • 2010
    • Fudan University
      Shanghai, Shanghai Shi, China
  • 2007–2010
    • Tongji University
      • Department of Chemistry
      Shanghai, Shanghai Shi, China