Jilin Tang

Chinese Academy of Sciences, Peping, Beijing, China

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Publications (54)223.49 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Developing inexpensive and highly efficient non-precious-metal electrocatalysts has been proposed as a promising alternative to platinum-based catalysts for the hydrogen evolution reaction (HER). Herein, we report novel FeP NPs supported on inexpensive and available candle soot (FeP-CS) derived from Fe3O4-CS hybrid precursors obtained after a phosphidation reaction. As HER electrocatalysts, the FeP-CS hybrids exhibit high electrocatalytic ability for HER with a Tafel slope of 58 mV dec(-1), a low onset overpotential of 38 mV, a large exchange current density of 2.2 × 10(-1) mA cm(-2) and an overpotential of 112 mV to obtain a current of 10 mA cm(-2). The present work shows significant advance in designing and developing non-precious-metal electrocatalysts for hydrogen evolution reaction.
    Nanoscale 02/2015; · 6.74 Impact Factor
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    ABSTRACT: A facile hydrothermal method combined with a post solution reaction is developed to synthesize interconnected three-dimension (3D) hierarchical Co3-xFexO4 ferrite (CF) on nickel foam. By controlling the experimental parameters, the structures of the products are tailored from nanoflowers to microflowers with different sized void interiors. The obtained 3D hierarchical flower-like CF are characterized by field emission scanning electron microscopy, X-ray diffraction, and inductively coupled plasma mass spectrometer analysis. The 3D hierarchical flower-like CF-nickel foam with the rational structural feature could be used as binder and conductive agent-free supercapacitor electrodes directly. Such integrated electrodes exhibit a high specific capacitance and well cycling stability when the charge-discharge current density is high. Remarkably, the 3D hierarchical CF microflowers exhibit specific capacitance values of 768 F g−1 at a constant current density of 6 A g−1. The CF microflowers also show high charge-discharge reversibility with an efficiency of 79.2% after 5000 cycles.
    Electrochimica Acta 11/2014; · 4.09 Impact Factor
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    ABSTRACT: A synthetic route to FeP-GS hybrid sheets that show good stability and high electrocatalytic activity for hydrogen evolution reaction is reported. The materials are prepared via thermal phosphidation of pre-synthesized Fe3O4-GS hybrid sheets.
    Chemical Communications 08/2014; · 6.38 Impact Factor
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    ABSTRACT: A facile approach was proposed for the synthesis of hierarchical CoxFe3−xO4 nanocubes (CF nanocubes), using Prussian Blue (PB) as precursor. The method consists of the synthesis of hierarchical cobalt–iron Prussian blue analogues (PBAs) through the reaction of PB nanocubes with CoCl2 in a water bath and subsequently calcining the corresponding PBA precursor. The obtained CF nanocubes were characterized using transmission electron microscopy, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and N2 adsorption–desorption isotherm measurements. It is found that the hierarchical CF nanocubes have a large specific surface area (108 m2 g−1). Considering the hierarchical structure and the doping of Co in Fe3O4 are beneficial for the catalytic activity of the catalyst, an efficient and simple colorimetric biosensor for H2O2 and glucose was fabricated using CF nanocubes as a peroxidase mimetic. The good catalytic activity and low-cost make the hierarchical CF nanocubes a useful biocatalyst for a wide range of potential applications in medicine and biotechnology.
    RSC Advances 08/2014; 4(67). · 3.71 Impact Factor
  • Baoping Lu, Jilin Tang
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    ABSTRACT: Ultrathin two-dimensional (2D) nanosheets of layered transition-metal chalcogenide are theoretically and technologically intriguing. However, it still remains a great challenge to synthesize ultrathin nanosheets because of the lack of an intrinsic driving force for anisotropic growth of 2D superposed microstructures. Here we demonstrate, for the first time to our knowledge, the in situ synthesis of large-scale ultrathin Sb2S3 nanosheets on graphene sheets (G) by solvothermal method in the water/ethylene glycol mixed solvent. Owing to the synergetic chemical coupling effects between G and Sb2S3, Sb2S3–G hybrid nanosheets exhibit high catalytic performance for degradation of methylene blue in the presence of H2O2. In the meantime, it was found that the resulting Sb2S3–G displays good electrocatalytic activity towards the hydrazine oxidation. This work not only offers a low-cost and high performance alternative technology for synthesizing sheet-like Sb2S3, but also opens the door toward fabrication of varying types of metal sulfide–graphene nanomaterials that will have wide application in the catalysis, environmental, and new energy fields.
    Dalton Transactions 07/2014; · 4.10 Impact Factor
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    ABSTRACT: Binding of antibodies to their cognate antigens is fundamental for adaptive immunity. Molecular engineering of antibodies for therapeutic and diagnostic purposes emerges to be one of the major technologies in combating many human diseases. Despite its importance, a detailed description of the nanomechanical process of antibody-antigen binding and dissociation on the molecular level is lacking. Here we utilize high-speed atomic force microscopy to examine the dynamics of antibody recognition and uncover a principle; antibodies do not remain stationary on surfaces of regularly spaced epitopes; they rather exhibit 'bipedal' stochastic walking. As monovalent Fab fragments do not move, steric strain is identified as the origin of short-lived bivalent binding. Walking antibodies gather in transient clusters that might serve as docking sites for the complement system and/or phagocytes. Our findings could inspire the rational design of antibodies and multivalent receptors to exploit/inhibit steric strain-induced dynamic effects.
    Nature Communications 07/2014; 5:4394. · 10.74 Impact Factor
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    ABSTRACT: A facile simple hydrothermal method combined with a post-solution reaction is developed to grow interconnected three dimensional (3D) hierarchical Co-Al layered double hydroxides (LDHs) on reduced graphene oxide (rGO). The obtained 3D hierarchical rGO-LDHs are characterized by field emission scanning electron microscopy, X-ray diffraction, and X-ray photo-electron spectroscopy. As LDHs nanosheets directly grow on the surface of rGO via chemical covalent bonding, the rGO could provide facile electron transport paths in the electrode for the fast Faradaic reaction. Moreover, benefiting from the rational 3D hierarchical structural, the rGO-LDHs demonstrate excellent electrochemical properties with a combination of high charge storage capacitance, fast rate capability and stable cycling performance. Remarkably, the 3D hierarchical rGO-LDHs exhibit specific capacitance values of 599Fg(-1) at a constant current density of 4Ag(-1). The rGO-LDHs also show high charge-discharge reversibility with an efficiency of 92.4% after 5000 cycles.
    Journal of Colloid and Interface Science 07/2014; 426:131–136. · 3.55 Impact Factor
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    ABSTRACT: A reversible detection method for vancomycin was developed utilizing the cantilever array sensor functionalized by a designed peptide consisting of a cysteine (Cys-), a space linker (-Gly-Gly-Gly-Gly-) and a molecular recognition ligand (-l-Lys-d-Ala-d-Ala). It was found that the peptide space linker was necessary and important for the response of the cantilever array sensor. The sensing cantilevers in the array were functionalized with the peptide while the reference cantilevers were modified by 6-mercapto-1-hexanol (MCH) to eliminate the influence of environmental disturbances. The binding between vancomycin and the peptide induced a change of surface stresses in the sensing cantilevers resulting in a differential deflection between the sensing and reference cantilevers. The reciprocal of the differential deflection is linear with the reciprocal of vancomycin concentration within the range of 2μM to 100μM (R=0.993) at a detection limit of 0.2μM (S/N=3). The reversible detection can be realized just by regenerating the sensing cantilevers with running buffer solution. Other antibiotics such as doxycycline, streptomycin, and kanamycin have negligible effect on the response of the sensor. The sensor can also be utilized for reversible detection of vancomycin in serum background, which clearly indicates the potential of the sensor for vancomycin detection in real biological samples.
    Biosensors & Bioelectronics 06/2014; 62C:145-150. · 6.45 Impact Factor
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    ABSTRACT: A facile two-step method was developed for a large-scale growth of hierarchical MnCo2O4.5 nanostructure modified MnOOH nanorods (MC hybrid materials) as an efficient catalyst for water treatment. The synthesis involved a one-step hydrothermal process to prepare MnOOH nanorods and subsequently a simple solution method using hydrothermally synthesized MnOOH nanorods as both the template and Mn source to obtain MnCo2O4.5/MnOOH (MC) hybrid materials. The as-prepared MC hybrid materials with hierarchical structures could provide more active sites for catalytic degradation of methylene blue. These results indicate that the designed MC hybrid materials exhibit a promising capability for the degradation of dyes.
    Catalysis Communications 02/2014; 46:174–178. · 3.32 Impact Factor
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    ABSTRACT: Human gonadotropin-releasing hormone receptor (GnRH-R; or type I GnRH-R) expressed in tumor cells has gained more and more attention as a distinct target for cancer therapy. Given the diverse clinical utility, improved characterization of the subcellular distribution and organization of GnRH-R is an important step in the development of more effective and possibly new therapeutic strategies. In the present study, the nano-organization of human GnRH-R was analyzed on human bladder cancer cell (T24) by atomic force microscopy (AFM). The recognition images reveal that GnRH-Rs (nano-domains or single GnRH-R) are irregularly distributed on the T24 cell surface with the sizes from ~ 4 to ~ 370 nm. The locations of the GnRH-Rs were identified on the topographical images with nanometer accuracy. The obtained results enrich our understanding of the local distribution of GnRH-Rs on T24 cell membrane and show the ability of biological AFM to obtain more complete and exact information on intact cell surface.
    Analytical Chemistry 01/2014; · 5.83 Impact Factor
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    ABSTRACT: A label-free detection method of kanamycin using aptamer-based cantilever array sensor was developed. The cantilever array was composed of sensing cantilevers and reference cantilevers. This configuration allowed direct detection of individual cantilever deflections and subsequent determination of differential deflection of sensing/reference cantilever pair. The sensing cantilevers were functionalized with kanamycin aptamer, which was used as receptor molecules while the reference cantilevers were modified with 6-mercapto-1-hexanol (MCH) to eliminate the influence of environmental disturbances. The kanamycin-aptamer interaction induced a change in cantilever surface stress, which caused a differential deflection between the sensing and reference cantilever pair. The surface stress change was linear with kanamycin concentration over the range of 100μM-10mM with a correlation coefficient of 0.995. A detection limit of 50μM was obtained, at a signal-to-noise ratio of 3. The sensor also showed good selectivity against other antibiotics such as neomycin, ribostamycin and chloramphenicol. The facile method for kanamycin detection may have great potential for investigating more other molecules.
    Biosensors & Bioelectronics 01/2014; 56C:112-116. · 6.45 Impact Factor
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    ABSTRACT: A reversible detection method for vancomycin was developed utilizing the cantilever array sensor functionalized by a designed peptide consisting of a cysteine (Cys-), a space linker (-Gly-Gly-Gly-Gly-) and a molecular recognition ligand (-l-Lys-d-Ala-d-Ala). It was found that the peptide space linker was necessary and important for the response of the cantilever array sensor. The sensing cantilevers in the array were functionalized with the peptide while the reference cantilevers were modified by 6-mercapto-1-hexanol (MCH) to eliminate the influence of environmental disturbances. The binding between vancomycin and the peptide induced a change of surface stresses in the sensing cantilevers resulting in a differential deflection between the sensing and reference cantilevers. The reciprocal of the differential deflection is linear with the reciprocal of vancomycin concentration within the range of 2 μM to 100 μM (R=0.993) at a detection limit of 0.2 μM (S/N=3). The reversible detection can be realized just by regenerating the sensing cantilevers with running buffer solution. Other antibiotics such as doxycycline, streptomycin, and kanamycin have negligible effect on the response of the sensor. The sensor can also be utilized for reversible detection of vancomycin in serum background, which clearly indicates the potential of the sensor for vancomycin detection in real biological samples.
    Biosensors and Bioelectronics. 01/2014; 62:145–150.
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    ABSTRACT: Graphene-based sheets that possess a unique nanostructure and a variety of fascinating properties are appealing as promising nanoscale building blocks of new composites. Herein, we present a general and effective approach for the preparation of metal oxide-graphene (metal oxide-G, metal oxide = Fe3O4, ZnO and Cu2O) by in situ nucleation and growth of metal oxide on the surface of graphene in tetraethylene glycol (TEG) solution. TEG, a nontoxic and environmentally friendly agent, acts as both solvent and reductant. Furthermore, the Fe3O4-G was employed as a two dimensional support for loading noble metal nanoparticles (Au or Pt) to synthesize Au@Fe3O4-G and Pt@Fe3O4-G ternary hybrid materials. The as-obtained Au@Fe3O4-G exhibited excellent catalytic activity in the reduction of 4-nitrophenol by NaBH4, and the Pt@Fe3O4-G showed remarkable electrocatalytic performance for hydrazine oxidation. We believe that the hybrid catalysts fabricated by this simple, efficient method have great potential for applications in other fields, such as electrochemical energy storage, sensors, and so on.
    RSC Advances 01/2014; 4(42):21909. · 3.71 Impact Factor
  • Carbon 11/2013; 63:157-164. · 6.16 Impact Factor
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    ABSTRACT: A facile process was developed for the synthesis of graphene-supported TiO2 (B) nanosheets (GTBN) composite based on the hydrothermal treatment titanium (III) chloride and graphene oxide in an ethylene glycol. The morphology and microstructure of the composites were examined by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, and Raman spectroscopy. The obtained GTBN show a high thermal stability and the phase transformation of TiO2 (B) to anatase can be prevented by graphene after pyrolysis of GTBN at 350°C for 2h. Furthermore, GTBN exhibited high rate performance and stability of lithium ion batteries, due to the enhanced conductivity of the electrode and accommodation to volume/strain changes during lithium insertion-extraction.
    Journal of Colloid and Interface Science 08/2013; 409. · 3.55 Impact Factor
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    ABSTRACT: The understanding of ligand binding interactions is an important component of understanding the fundamental mechanism of receptor function. In this study, the binding abilities of EGF and TGF-α to EGFR on human bladder cancer (T24) cells were investigated by single molecular force spectroscopy (SMFS) based on atomic force microscopy (AFM). By approaching the specifically functionalized AFM tips to the T24 cell surface and subsequent retraction, specific unbinding events of the EGF/EGFR complexes and TGF-α/EGFR complexes were investigated. Further, the unbinding forces and the kinetic off rate constants that govern the bond stabilities were calculated through varying the external mechanic forces applied. Meanwhile, the distances from the energy minimum to the transition states along the separation paths of the EGF/EGFR complexes and TGF-α/EGFR complexes were deduced. This study at single-molecule level may enrich our understanding of the ligand binding properties of EGFR and provide some new information to the development of improved EGFR inhibitors. In addition, the results present new insight into the study of the energy landscape of the dissociation of ligand-EGFR system.
    The Analyst 07/2013; · 3.91 Impact Factor
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    ABSTRACT: We report a simple and sensitive method for label-free detection of single-stranded DNA-binding protein (SSBP) based on an array of microfabricated cantilevers. The single-stranded DNA (ssDNA) was immobilized on the surface of the sensing cantilevers to detect SSBP, while the reference cantilevers were modified with 6-mercapto-1-hexanol to detect any unwanted cantilever deflection. The differential deflection signals that reveal specific SSBP-ssDNA binding have been found to depend on the SSBP concentration. Using the cantilever array sensor we can detect SSBP in the concentration range from 0.01 to 7μgmL(-1). Other proteins, such as thrombin or bovine serum albumin induced no significant deflection of the cantilevers. Our results show the potential for the application of cantilever array sensor system as a powerful tool to detect proteins with high sensitivity and specificity.
    Talanta 05/2013; 109:173-6. · 3.50 Impact Factor
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    ABSTRACT: A facile two step process was developed for the synthesis of porous Co3O4 nanorods- reduced graphene oxide (PCNG) hybrid materials based on the hydrothermal treatment cobalt acetate tetrahydrate and graphene oxide in a glycerol-water mixed solvent, followed by annealing the intermediate of reduced graphene oxide-supported Co(CO3)0.5(OH)•0.11H2O nanorods in a N2 atmosphere. The morphology and microstructure of the composites were examined by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy and Raman spectroscopy. It is shown that the obtained PCNG have intrinsic peroxidase-like activity. The PCNG are utilized for the catalytic degradation of methylene blue. The good catalytic performance of the composites could be attributed to the synergy between the functions of porous Co3O4 nanorods and reduced graphene oxide.
    ACS Applied Materials & Interfaces 04/2013; · 5.90 Impact Factor
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    ABSTRACT: A facile method is proposed for the synthesis of three-dimensional (3D) flower-like Co3-xFexO4 ferrite (CF) hollow spheres, using SiO2@FeOOH as precursor. The CF hollow spheres are efficient for the catalytic degradation of methylene blue (MB) in the presence of H2O2 at 80 °C. The obtained CF hollow spheres were characterized using transmission electron microscopy, field emission scanning electron microscopy, X-ray diffraction, X-ray photo-electron spectroscopy, and N2 adsorption-desorption isotherm measurements. The formation of 3D hierarchical flower-like superstructure was influenced by the relative amount of urea used. As the mole ratio of CoCl2 and urea decreased, the structure of the products was tailored from yolk-like spheres to hollow spheres with different sized void interiors. Moreover, N2 adsorption-desorption isotherm analysis showed that the CF hollow spheres have a large specific surface area (163 m2 g-1) which provided more activity sites. The CF hollow spheres can catalyze the oxidation of MB efficiently. These results indicate that the designed CF hollow spheres exhibit promising capability for the degradation of dyes.
    Nanoscale 03/2013; 5(7). · 6.74 Impact Factor
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    ABSTRACT: A facile method is proposed for the synthesis of cubic CoFe2O4 ferrite–reduced graphene oxide nanocomposite sheets (rGO–CFs), using poly(N-vinyl-2-pyrrolidone) as the reductant and stabilizer. The rGO–CFs functioned as efficient peroxidase mimetics and were successfully applied for colorimetric assay. The morphology and composition of the rGO–CFs were characterized by transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. Significantly, the peroxidase-like activity of the rGO–CFs followed typical Michaelis–Menten kinetics and showed a good affinity to 3,3,5,5-tetramethyl benzidine. Under optimum conditions, the colorimetric assay showed a lower detection limit (S/N = 3) of 0.3 μM when compared with that of other nanoparticle based colorimetric assays. Furthermore, the cubic nanostructured rGO–CFs exhibited better stability than horseradish peroxidase when they were exposed to solutions with different solvents and temperatures. These excellent properties made the cubic nanostructured rGO–CFs an ideal candidate for a wide range of potential applications as peroxidase mimetics.
    J. Mater. Chem. A. 03/2013; 1(13):4352-4357.

Publication Stats

417 Citations
223.49 Total Impact Points

Institutions

  • 2010–2014
    • Chinese Academy of Sciences
      • State Key Laboratory of Electroanalytical Chemistry
      Peping, Beijing, China
  • 2013
    • Nanchang University
      Nan-ch’ang-shih, Jiangxi Sheng, China
  • 2006–2012
    • Johannes Kepler University Linz
      • Institut für Biophysik
      Linz, Upper Austria, Austria
  • 2011
    • Anhui University
      • School of Chemistry and Chemical Engineering
      Hefei, Anhui Sheng, China