Peng Hu

Chinese Academy of Sciences, Peping, Beijing, China

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Publications (12)62.62 Total impact

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    ABSTRACT: Uniform and small Ag@AgCl nanoparticles were for the first time prepared through a vapor diffusion strategy at room temperature. The size of the Ag@AgCl nanoparticles could be controlled by a diffuse vapor of HCl molecules with a slow rate and PVP used as a precursor. The smallest Ag@AgCl NPs exhibit excellent photocatalytic activity and stability.
    Catal. Sci. Technol. 08/2014;
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    ABSTRACT: In this paper, a series of BiOIαCl1-α solid solution electrodes were successfully prepared through a simple electrodeposition method. The obtained electrodes were characterized by X-ray diffraction, scanning electron microscopy, UV–vis diffuse reflectance spectroscopy and photocurrent response. We found that all prepared electrodes exhibited p-type conductivity in accordance with reports employing other deposition strategies. What's more, the BiOIαCl1-α solid solution showed the best photoelectrochemical activity at α = 0.5 due to the balance between the level of conduction band and the light absorption ability of solid solutions. Finally, wet photovoltaic cells with p-BiOI0.5Cl0.5 and n-TiO2 nanotube array electrodes were also constructed.
    Electrochimica Acta 01/2014; 115:263–268. · 4.09 Impact Factor
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    Peng Hu, Lei Han, Shaojun Dong
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    ABSTRACT: In this work, we introduced a facile method for the construction of polypyrrole/hemin (PPy/hemin) nanocomposite via one-pot chemical oxidative polymerization. In this process, hemin molecule served as a dopant was entrapped in the PPy nanocomposite during chemical oxidative polymerization. Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and UV-visible spectroscopy results demonstrated that the PPy/hemin nanocomposite was successfully synthesized. The as-prepared nanocomposite exhibited intrinsic peroxidase-like catalytic activities, strong adsorption properties and excellent Near-Infrared (NIR) light-induced thermal effect. We utilized the nanomaterials to catalyze the oxidation of a peroxidase substrate 3, 3, 5, 5-tetramethylbenzidine by H2O2 to the oxidized colored product which provided a colorimetric detection of glucose. As low as 50 μM glucose could be detected with a linear range from 0.05 to 8 mM. Moreover, the obtained nanocomposite also showed excellent removal efficiency for Methyl Orange and Rhodamine B and photothermal effect, which implied a promising application as the pollutant adsorbent and photothermal agent. The unique nature of PPy/hemin nanocomposite makes it very promising for the fabrication of inexpensive, high-performance bioelectronic devices in the future.
    ACS Applied Materials & Interfaces 12/2013; · 5.90 Impact Factor
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    ABSTRACT: TiO2 nanotube arrays (NTA), prepared by potentiostatic anodization, were discovered to possess an intrinsic peroxidase-like activity. The colorimetric and electrochemical assays both demonstrated their excellent catalytic activity towards H2O2 reduction. On this basis, a simple and inexpensive electrochemical biosensor for glucose detection was developed.
    Chemical Communications 10/2013; · 6.38 Impact Factor
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    ABSTRACT: In this work, Au@TiO2 core-shell nanocomposites have been successfully prepared one-pot method through combining reverse micelle technique with the redox reaction between Au (III) and titanium (III) for the first time, and showed excellent stability towards catalytic reduction of 4-nitrophenol.
    RSC Advances 06/2013; · 3.71 Impact Factor
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    ABSTRACT: We have constructed a colorimetric protein assay platform based on a nanoreactor. The novel strategy presents high sensitivity and excellent performance for the detection of thrombin. The linear range is 5.58 × 10(-10) to 6.50 × 10(-9) M and the detection limit down to 0.19 nM is achieved.
    Chemical Communications 01/2013; · 6.38 Impact Factor
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    ABSTRACT: A highly robust electrochemically controlled fluorescence switch based on ultrasmall Au nanoclusters has been designed by the aid of the electrochemical redox reaction of prussian blue.
    Chemical Communications 11/2012; · 6.38 Impact Factor
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    ABSTRACT: In this study, reversible electroswitched luminescence is realized in a novel hybrid composite of organic-inorganic polymers and Pyronin Y-doped silica nanoparticles (PYDS) in aqueous solutions for the first time. The electrochromic material, poly (3,4-ethylenedioxythiophene) (PEDOT), is electrodeposited on the electrode in the presence of phosphododecamolybdic acid (PMo(12)). The luminescence of PYDS can be effectively switched between "on" and "off" states by applying oxidation and reduction potentials of PEDOT via the corresponding luminescence quenching effect. The electrochromic devices (ECDs) we report here exhibit lots of advantages, such as easy fabrication, high contrast of fluorescence response, good reversibility, and long-time stability. The creative application of PEDOT in ECDs in aqueous solutions is anticipated to offer important hints and a basis for other organic materials in the field of photoelectric devices.
    Nanoscale 11/2012; · 6.73 Impact Factor
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    ABSTRACT: We demonstrated a simple, in situ reduction route to the synthesis of two-dimensional graphene oxide/SiO(2) (GSCN) hybrid nanostructures consisting of Au nanoparticles (Au NPs) supported on the both sides of GSCN. The as-prepared GSCN/Au NPs hybrid nanomaterials exhibited good catalytic activity for the reduction of 4-nitrophenol. This approach provided a useful platform based on GO hybrid nanomaterials for the fabrication of GSCN/Au NPs hybrid nanomaterials, which could be very useful in catalytic applications.
    Nanoscale 03/2012; 4(5):1641-6. · 6.73 Impact Factor
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    ABSTRACT: A novel inorganic-organic hybrid film structure based on polyoxometalate and conventional organic dye has been fabricated, whose fluorescence can be reversibly switched using the electrochromic component to activate or suppress the related fluorescence quenching mechanism upon applying reduction or oxidation potentials of polyoxometalates.
    Chemical Communications 02/2012; 48(15):2101-3. · 6.38 Impact Factor
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    ABSTRACT: We report here a graphene oxide (GO)-based fluorescent aptasensor for adenosine detection by employing exonuclease III (Exo III) as a signal amplifying element. In the absence of adenosine, the adenosine aptamers hybridized with the complementary DNA (cDNA), and the Exo III could not cleave the single-strand signal probes labeled with carboxylfluorescein (FAM) at its 5' ends. When the graphene oxide was finally added, it could strongly adsorb the single-strand signal probes and quenched the fluorophore effectively. In the presence of adenosine, the aptamers associated with the targets, which led to the formation of duplex DNAs between the cDNAs and the signal probes. The Exo III thereafter could digest the duplex DNAs from 3' blunt terminus of signal probes, liberating the fluorophore. Upon adding the GO, the fluorophore could not be adsorbed and quenched. By coupling cyclic enzymatic cleavage, a remarkable fluorescent increase was obtained. Due to the specific recognition ability of the aptamer for the target and the powerful quenching property of GO for signal probe, this proposed approach has a good selectivity and high sensitivity for adenosine. In the optimum conditions described, >100% signal enhancement was achieved and a limit of detection as low as 1 nM was obtained, which is lower than those of commonly used fluorescent aptamer sensors. Moreover, the biosensor exhibited an ultrahigh sensitivity and held a versatile platform for clinical diagnostics, molecular biology and drug developments.
    Biosensors & Bioelectronics 02/2012; 34(1):83-7. · 6.45 Impact Factor
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    ABSTRACT: In this work, a novel fluorescence biosensor was demonstrated for detection of Hg(2+) ions with relatively high selectivity and sensitivity. The sensing scheme was based on G-quenching induced by Hg(2+) ions. In the presence of Hg(2+) ions, the single-stranded signal probe which has carboxylfluorescein (FAM) and guanine segment at its 5' and 3' ends, respectively, folded into duplex-like structure via the Hg(2+)-mediated coordination of T-Hg(2+)-T base pairs. It brought guannine segment close to the dye and caused a remarkable decrease of fluorescence signal. The sensor showed a sensitive response to Hg(2+) ions in a concentration range from 0.5 to 10 μM, and a detection limit of 0.5 nM was given. This homogeneous system required only a single-labeled oligonucleotide, operated by concise procedures, and possessed comparable sensitivity as previous approaches. Furthermore, the sensor exhibits a great perspective for future practical applications.
    Talanta 07/2011; 85(1):713-7. · 3.50 Impact Factor

Publication Stats

34 Citations
62.62 Total Impact Points

Institutions

  • 2012–2014
    • Chinese Academy of Sciences
      • State Key Laboratory of Electroanalytical Chemistry
      Peping, Beijing, China
  • 2011–2014
    • Northeast Institute of Geography and Agroecology
      • State Key Laboratory of Electroanalytical Chemistry
      Peping, Beijing, China