Shaoming Fang

Zhengzhou University of Light Industry, Cheng, Henan Sheng, China

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Publications (68)210.43 Total impact

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    ABSTRACT: Cu2O@aptamer nanospheres were prepared via a facile one-step synthesis using aptamer as template. The precursor CuSO4 was reduced in the presence of aptamer to form Cu2O@aptamer nanospheres. In comparison with the pristine Cu2O immobilized with aptamer, the resultant Cu2O@aptamer nanospheres exhibit high sensitivity for detecting thrombin. The results showed that the developed electrochemical biosensor based on Cu2O@aptamer nanospheres has a detection limit of 0.01 ng mL−1 (0.33 pM) within the linear range from 0.1 to 50 ng mL−1 toward the thrombin detection. Moreover, excellent selectivity toward interfering proteins, such as IgG, IgE, and BSA, was achieved. The fabricated electrochemical immunobiosensor provides a promising alternative for determining other biological samples.
    Sensors and Actuators B Chemical 12/2015; 220:184-191. DOI:10.1016/j.snb.2015.05.089 · 4.29 Impact Factor
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    ABSTRACT: Nanorod-like nanocomposite of three-dimensional reduced graphene oxide and polyaniline (3D-rGO@PANI) was synthesized via an in situ chemical oxidative polymerization method and was then used as the sensitive layer of a DNA adsorbent for detecting Hg2+ in aqueous solution. Amino-group-rich 3D-rGO@PANI exhibited high affinity toward the immobilization of T-rich DNA strands, which preferred to bind with Hg2+ to form THg2+T coordination. Electrochemical impedance spectroscopy was applied to determine the difference in the electrochemical performances during Hg2+ detection. The results demonstrated that the electrochemical biosensor based on 3D-rGO@PANI nanocomposite showed high sensitivity and selectivity toward Hg2+ within a concentration range from 0.1 nM to 100 nM with low detection limit of 0.035 nM. The proposed nanosensor could be applied for highly sensitive and selective determination of heavy metal ion in various environmental detections.
    Sensors and Actuators B Chemical 07/2015; 214. DOI:10.1016/j.snb.2015.02.127 · 4.29 Impact Factor
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    ABSTRACT: A composite made of polyacrylic acid and hollow TiO2 spheres (TiO2@PPAA) was prepared by the plasma polymerization method and subsequently used as an electrode material for detecting lysozyme. The chemical structure, surface morphology, and electrochemical performance of the TiO2@PPAA composite were mainly affected by the plasma input power used during plasma polymerization. After optimizing plasma conditions, aptamer strands exhibited high adsorption affinity toward the surface of TiO2@PPAA composite via synergistic effects between TiO2 and PPAA. Electrochemical impedance spectroscopy results showed that the developed TiO2@PPAA aptasensor presents highly sensitive detection ability toward lysozyme; the limit of detection of the proposed aptasensor is 0.015ngmL(-1) (1.04pM) within the range of 0.05-100ngmL(-1) in terms of 3σ value. The film further showed excellent selectivity toward lysozyme in the presence of interfering proteins, such as thrombin, bovine serum albumin, and immunoglobulin E. Thus, this aptasensing strategy might broaden the applications of plasma polymerized nanomaterials in the field of biomedical research and early clinical diagnosis. Copyright © 2015 Elsevier B.V. All rights reserved.
    Biosensors & Bioelectronics 07/2015; 74:384-390. DOI:10.1016/j.bios.2015.06.062 · 6.45 Impact Factor
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    ABSTRACT: A feasible method for different ZnO nanostructures fabrication via the O2 plasma surface modification was reported in the present work. After the as-prepared ZnO nanoparticles were dispersed in the aqueous solution of Na2CO3, the resultant nanomatter was treated by O2 plasma for different times at high plasma input power of 200 W. It shows different nanostructures of ZnO were observed, such as nanowire, nanosheet, nanoneedles, and nanoparticles. Also, the chemical and crystal performances of the resultant ZnO nanostructures were depended on the duration of plasma. On these bases, the formation mechanism of new nanostructured ZnO-related materials was discussed. In comparison with the pristine ZnO, the plasma modified ZnO nanostructures (p-ZnO) exhibited a relative high electrochemical performance and sensitivity toward the detection of ractopamine (RAC) with a detection limit of 1.18 ng mL−1 within the range of 5-500 ng mL−1. It hints that the p-ZnO nanostructure could be used as a new alternative electrochemical biosensor for the detection of the food additives.
    Plasma Chemistry and Plasma Processing 07/2015; 35(4). DOI:10.1007/s11090-015-9617-x · 1.60 Impact Factor
  • Zhenxin Liu · Yu Xing · Shaoming Fang · Xiongwei Qu · Depeng Wu · Aiqin Zhang · Bei Xu
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    ABSTRACT: There is an intense need for development in the field of hierarchically structured functional materials owing to their outstanding and peculiar properties. Herein, we report the 3D Mn3O4 hierarchical architectures synthesized based on a self-assembly approach via a hydrothermal synthesis route at low temperature, which is sparse in literature. The synthesized Mn3O4 hierarchical architectures were characterized with XRD, FE-SEM, HRTEM/SAED, and FTIR. Electrochemical studies show that the Mn3O4 hierarchical architectures exhibit acceptable specific capacitance and excellent electrochemical stability, making them promising electrode materials in electrochemical capacitors.
    RSC Advances 06/2015; 5(68). DOI:10.1039/C5RA08697C · 3.84 Impact Factor
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    ABSTRACT: We report the production of a novel nanoflower material of Mn3(PO4)2@BSA hybrid which is made of both protein and manganese (II) phosphate, and its application as a new support material for platinum nanoparticles (PtNPs). The Mn3(PO4)2@BSA@PtNPs catalyst is synthesized using this new material. The average size of PtNPs on the Mn3(PO4)2@BSA nanoflower is approximately 2 nm. The obtained Mn3(PO4)2@BSA@PtNPs nanocomposites are characterized by X-ray diffraction, high resolution transmission electron microscopy, and scanning electron microscopy. Electrochemical results show that the Mn3(PO4)2@BSA@PtNPs catalyst also shows excellent electrocatalytic activity toward methanol oxidation with higher electrochemically active surface area. The microstructure of the supporting material serves a crucial function in the electrochemical performance of the Pt-based catalyst.
    Journal of Power Sources 06/2015; 284. DOI:10.1016/j.jpowsour.2015.03.011 · 6.22 Impact Factor
  • Shumin Sun · Peiyuan Wang · Shen Wang · Qiong Wu · Shaoming Fang
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    ABSTRACT: Nanoporous 3D graphene was fabricated using NH2–SiO2 particles as a sacrificial template. For further capacitance boost, MnO2 was firstly deposited onto the nanoporous 3D graphene through the reaction between KMnO4 and graphene via the hydrothermal method. Owing to the synergistic effect between the unique nanoporous 3D graphene and the high specific capacitance of MnO2, the MnO2/nanoporous 3D graphene electrode demonstrated excellent electrochemical performance, including a high specific capacitance and an extended long cycle life. This work showed that the MnO2/nanoporous 3D graphene could present significant potential for energy storage applications.
    Materials Letters 04/2015; 145. DOI:10.1016/j.matlet.2015.01.061 · 2.27 Impact Factor
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    ABSTRACT: We report a novel electrochemical sensor for the sensitive detection of Cu(II) ions based on hollow TiO2 spheres modified by fluorescein hydrozine-3,6-diacetic acid (FH). Herein, hollow TiO2 spheres were synthesized via the hydrothermal method with the carbon spheres as the template then modified by (3-aminopropyl) trimethoxysilane (APTMS) to form the amino group-modified TiO2 spheres (TiO2–APTMS). Simultaneously, FH was activated by 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride/N-hydroxysuccinimide, in which the carboxyl groups were changed to active ester groups. Consequently, TiO2–APTMS spheres could be modified by FH with the activated ester groups via the bonding of amide groups to produce the composite electrode with TiO2 and FH (Au–TiO2–FH). The resulting Au–TiO2–FH was used to develop the electrochemical sensor for the highly sensitive detection of Cu2+ in aqueous solution because of the coordination between Cu2+ and FH, the whole process of which was determined via electrochemical impedance spectroscopy. The results showed that a detection limit of 4.29 pM of the developed sensor within the range from 5 pM to 1 μM was obtained. Furthermore, the interference from other metal ions, such as K+, Na+, Ag+, Ni2+, Mn2+, Zn2+, Mg2+, and Fe3+, associated with Cu2+ analysis could be effectively inhibited. Most importantly, the developed electrochemical sensor could be reproduced and degraded by UV light irradiation because of the light degradation ability of TiO2 toward FH. This novel sensor could also be used to detect other heavy metal ions when TiO2 spheres are modified by the relative FH.
    Electrochimica Acta 04/2015; 161. DOI:10.1016/j.electacta.2015.02.094 · 4.50 Impact Factor
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    ABSTRACT: A novel composite with imine-linked covalent organic frameworks on graphene was synthesized in one step with the amine functionalized reduced graphene oxide as the support. The excellent electrochemical properties of this composite can be ascribed to the synergistic effect of the introduction of covalent organic frameworks as well-dispersed nanoscale deposits on the conductive graphene surfaces.
    RSC Advances 03/2015; 5(35). DOI:10.1039/C5RA02251G · 3.84 Impact Factor
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    ABSTRACT: A sensitive aptasensor based on a nanocomposite of hollow titanium dioxide nanoball, three-dimensional reduced graphene oxide, and polypyrrole (TiO2/3D-rGO/PPy) was developed for lysozyme detection. A lysozyme aptamer was easily immobilized onto the TiO2/3D-rGO/PPy nanocomposite matrix by assembling the aptamer onto graphene through simple π-stacking interactions and electrostatic interactions between PPy molecular chains and aptamer strands. In the presence of lysozyme, the aptamer on the adsorbent layer catches the target on the electrode interface, which generates a barrier for electrons and inhibits electron transfer, subsequently resulting in decreased electrochemically differential pulse voltammetric signals of a gold electrode modified with TiO2/3D-rGO/PPy. Using this strategy, a low limit of detection of 0.085 ng mL(-1) (5.5 pM) for detecting lysozyme was observed within the detection range of 0.1-50 ng mL(-1) (0.007-3.5 nM). The aptasensor also presents high specificity for lysozyme, which is unaffected by the coexistence of other proteins. Such an aptasensor opens a rapid, selective, and sensitive route to lysozyme detection. This finding indicates that the TiO2/3D-rGO/PPy nanocomposite could be used as an electrochemical biosensor for detecting proteins in the biomedical field.
    Dalton Transactions 03/2015; 44(14). DOI:10.1039/c5dt00168d · 4.20 Impact Factor
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    Xiaojing Zhang · Yuelei Hu · Ruixue Liu · Jiashu Sun · Shaoming Fang
    Macromolecular Research 03/2015; 23(3). DOI:10.1007/s13233-015-3038-9 · 1.68 Impact Factor
  • Zhenxin Liu · Bei Xu · Yu Xing · Jingjing Li · Linsen Zhang · Lizhen Wang · Shaoming Fang
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    ABSTRACT: The current literature generally reports the relationship between particle size and electrochemical performance of carbon-coated LiFePO4 (LFP). However, besides the factor of particle size, the quality of carbon coating will affect the electrochemical performance of LiFePO4 simultaneously. Logistically, each independent equation is solvable when it contains just one variable and is not solvable when it contains two or more variables. Therefore, we decide to study the relationship between particle size and electrochemical performance of uncoated LiFePO4, of which the relevant literature is sparse. To prepare samples within a wide range for average particle sizes, a traditional precipitation approach was employed to prepare the LFP materials with different average particle sizes of 30-500 nm. Carbon-coated LiFePO4 materials were prepared for the purpose of comparison studies. Both pristine LiFePO4 and carbon-coated LiFePO4 were investigated by XRD, FESEM, as well as charge/discharge testing (in the form of coin cells). The details of materials syntheses were discussed. Without the influence of carbon coating, the discharge capacity of pristine LiFePO4 exhibited a “volcano”-type relationship versus the average primary particle size in the size range of 50-500 nm and reaches a maximum value at the optimum size of about 200 nm. This finding may drive the development of power grade LFP cathode nanomaterials toward more precise particle size optimization.
    Journal of Nanoparticle Research 03/2015; 17(3). DOI:10.1007/s11051-015-2969-6 · 2.28 Impact Factor
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    ABSTRACT: Inspired by how geckos abduct, rotate, and adduct their setal foot toes to adhere to different surfaces, we have developed an artificial muscle material called ion-exchange polymer-metal composite (IPMC) which, as a synthetic adhesive, is capable of changing adhesion. The synthetic adhesive was cast from a Si template through a sticky colloid precursor of poly(methylvinylsiloxane) (PMVS). The PMVS array of setal micropillars had a high density of pillars (3.8×103 pillars/mm2) with mean diameter of 3 μm and pore thickness of 10 m. Graphene oxide monolayer containing Ag globular nanoparticles (GO/Ag NPs) with diameters of 5-30 nm were fabricated and doped in the ion exchanging membrane of Nafion to improve carrier transfer, water saving, and ion exchange capabilities, which thus enhanced electromechanical response of IPMC. After attached to PMVS micropillars, IPMC was actuated by square wave inputs at 1.0 V, 1.5 V, or 2.0 V to bend to and fro, driving the micropillars to actively grip or release the surface. To determine the micropillar adhesions, the normal adsorption force and normal desorption force are measured when IPMC drives setal micropillars for gripping and releasing, respectively. Adhesion results demonstrated that the normal adsorption forces were 5.54, 14.20, and 23.13 folds higher than the normal desorption forces, under respective voltages. In addition, shear adhesion or frictions increased by 98%, 219% and 245%, respectively. Our new technique provides advanced design strategies for reversible gecko-inspired synthetic adhesives, which might be used for spiderman-like, wall-climbing devices with unprecedented performances.
    ACS Applied Materials & Interfaces 02/2015; 7(9). DOI:10.1021/am509163m · 6.72 Impact Factor
  • Zhenxin Liu · Yu Xing · Yingying Xue · Depeng Wu · Shaoming Fang
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    ABSTRACT: Literature about ZnAl2O4-supported cobalt Fischer-Tropsch synthesis (FTS) catalytic materials is sparse. A series of cobalt-containing nanocomposites, supported by nanosized ZnAl2O4 spinel (i.e., a complex oxide of about 6.4 nm) or alumina (i.e., a simple oxide of about 6.2 nm), were prepared via urea-gelation, coprecipitation, or impregnation methods followed by stepwise reduction. These materials were examined by XRD, TGA, nitrogen sorption, FESEM, and EDS. Effects of corrosion and pore size distributions on materials preparation were also investigated. The “coprecipitation/stepwise reduction” route is facile and suitable to prepare nanosized ZnAl2O4-supported Co0 nanocomposites. At similar CO conversions, the coprecipitated Co/ZnAl2O4 exhibits significantly lower C1 hydrocarbon distribution, slightly lower C5+ hydrocarbon distribution, significantly higher C2-C4 hydrocarbon distribution, and significantly higher olefin/paraffin ratio of C2-C4 than Co/γ-Al2O3.
    Journal of Nanoparticle Research 02/2015; 17(2). DOI:10.1007/s11051-015-2899-3 · 2.28 Impact Factor
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    ABSTRACT: Cuprous oxide and nano-chitosan composites (Cu2O@NCs) were synthesized by one-step reduction process and used as a highly sensitive electrochemical DNA sensor for detecting Hg2+ ions in aqueous solutions. The entire detection procedure of Hg2+ ions based on the developed electrochemical biosensor was investigated by electrochemical impedance, which shows that a single-stranded, thymine (T)-rich DNA was immobilized onto the surface of the composite electrode modified by Cu2O@NCs. The Cu2O@NCs modified with DNA exhibited significant sensitivity in detecting Hg2+ ions compared with pristine cuprous oxide and nano-chitosan. This behavior led to a high difference in charge-transfer resistance during Hg2+ ions detection. In Addition, Cu2O@NCs exhibited high sensitivity and stability for detecting Hg2+ ions with a detection limit of 0.15 nmol L−1 within the range of 1 to 100 nmol L−1 of Hg2+ ions. The fabricated Cu2O@NCs may be used as a novel biosensor for detecting heavy metal ions in water or the environment.
    Electrochimica Acta 02/2015; 160. DOI:10.1016/j.electacta.2015.02.030 · 4.50 Impact Factor
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    ABSTRACT: We report a novel kind of electrochemical biosensor based on Mn3(PO4)2-like nanoflowers for detecting ractopamine. Mn3(PO4)2-protein hybrid nanocomposites were synthesized by self-assembly method, in which proteins such as immunoglobulin G (IgG), bovine serum albumin (BSA), and ractopamine antibody (RACanti) play an important role in the production of nanoflowers. To evaluate the efficiency of different biosensors based on Mn3(PO4)2-like nanoflowers, three kinds of nanocomposites were prepared, i.e., the nanocomposite of Mn3(PO4)2 and IgG (Mn3(PO4)2@IgG), RACanti (Mn3(PO4)2@RACanti), and BSA together with Au nanoparticles (Mn3(PO4)2@BSA@AuNPs). Different detection approaches were designed and carried out for varied biosensors. Mn3(PO4)2@BSA@AuNP and Mn3(PO4)2@RACanti nanocomposites were used as the sensitive layer of the electrochemical biosensor for RAC detection. However, only after RACanti adsorption onto the Mn3(PO4)2@IgG nanocomposite surface, the developed electrochemical biosensor was applied to detect ractopamine. Results showed that these Mn3(PO4)2-like nanoflowers exhibited high chemical activity and good electrochemical performance. All ractopamine detection procedures were determined by electrochemical measurements, providing extremely low detection limits of 9.32, 4.6, and 26 pg·mL−1 for three kinds of nanoflowers. Therefore, Mn3(PO4)2-like nanoflowers could also be utilized as electrochemical biosensors for various detection procedures in different fields.
    Sensors and Actuators B Chemical 02/2015; 211. DOI:10.1016/j.snb.2015.01.106 · 4.29 Impact Factor
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    ABSTRACT: The reaction of enantiomeric bis-bidentate bridging ligands (+)/(-)-2,5-bis(4,5-pinene-2-pyridyl)pyrazine (LS/LR) with [Re(CO)5Cl] yielded a pair of dinuclear Re(i) enantiomers formulated as [Re2(LS/LR)(CO)6Cl2]·4CH2Cl2 ( and , the isomers containing the respective LR and LS ligands). They were characterized by elemental analyses, IR spectra and X-ray crystallography. Circular dichroism spectra verified their chiroptical activities and enantiomeric nature. The measurements of second harmonic generation (SHG) and ferroelectric properties showed that displays a nonlinear optical (NLO) activity and ferroelectricity with a remnant polarization (Pr) of 1.6 μC cm(-2) under an applied field of 7.3 kV cm(-1) at room temperature. and represent the first example of polynuclear Re(i) complexes with ferroelectric properties. Notably, the Pr value is much larger than that of the reported mononuclear chiral Re(i) analogue. In particular, unlike mononuclear Re(i) complexes of the type [Re(CO)3(N^N)(X)] (N^N = diimine and X = halide), which usually exhibit an intense emission in the visible range, and do not show any detectable emission at any temperature range and the reason for the nonluminescence of and was further elucidated in this work. Moreover, our research results also elucidated that Re nuclearity has a great influence on not only the emitting properties but also on ferroelectric behavior.
    Dalton Transactions 01/2015; 44(9). DOI:10.1039/c4dt03884c · 4.20 Impact Factor
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    ABSTRACT: Multifunctional composite of rGO/Fe3O4/Ag@AgCl, i.e. Fe3O4 nanoparticles (~300 nm in size) and Ag@AgCl nanoparticles loaded on the carbon basal planes of reduced graphene oxide is synthesized in this work. The composite shows a high adsorption capacity of the RhB. The photocatalytic experiment results indicate that the degradation of RhB could reach 98% within 50 min visible-light irradiation and the photoactivity of the composite increases with the increasing rGO content. In addition, in-situ Raman scattering spectra can monitor the presence of RhB and its degradation reaction with the rGO/Fe3O4/Ag@AgCl itself as the substrate. The reusability study suggests that the prepared composite can still maintain high degradation rate and catalyst recovery after five cycles, verifying its potential application in water purification.
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    ABSTRACT: Ethephon is a plant growth regulator and often applied in the process of the fruits growth. It could result in considerable inhibition of cholinesterase in blood plasma and erythrocytes and is very harmful to human beings once excessive consumption. The nanocomposites from polyaniline and stannic oxide (SnO2@PANI) were synthesized and developed as the electrode material for detecting ethephon. Herein, SnO2 nanoparticles were prepared by the method of liquid phase precipitation. Afterwards, the as-prepared SnO2 nanoparticles were mixed with the aniline polymerization system to form the SnO2@PANI nanocomposite. The basic chemical components of the fabricated sensor were characterized in detail using Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy. It demonstrates that the developed SnO2@PANI nanocomposite exhibits good electrochemical performance with relatively low charge-transfer resistance. Compared with the pristine SnO2 and PANI, ethephon preferred to adsorb onto the SnO2@PANI nanocomposite surface because of the synergic interaction between two components of SnO2 and PANI. The electrochemical impedance spectra illustrated that the fabricated ethephon sensor had excellent sensitivity, with a detection limit of 4.76 pg/mL within the range from 0.01 to 5 ng/mL. Moreover, the developed electrochemical biosensor exhibits good selectivity and stability. All of these food performances provide a promising tool to detect the illegal food additives.
    Analytical methods 01/2015; 7(11):4725-4733. DOI:10.1039/C5AY01028D · 1.94 Impact Factor
  • Zhenxin Liu · Yu Xing · Shaoming Fang · Xiongwei Qu
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    ABSTRACT: To the best of our knowledge, there is no single crystalline γ-MnOOH nanotube materials synthesized through one-step approach so far. A facile, one step route was developed to synthesize γ-MnOOH nanotubes. The structure and texture features of materials were analyzed by XRD and BET nitrogen sorption respectively, while the morphologies were characterized by FESEM. Electrochemical experiment results demonstrate that the γ-MnOOH nanotubes should be a good candidate as electrode material for supercapacitors.
    Journal of Materials Science Materials in Electronics 01/2015; DOI:10.1007/s10854-015-3172-3 · 1.97 Impact Factor