Peng Wang

China Agricultural University, Peping, Beijing, China

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Publications (291)694.99 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Cu(II)–Fe(II)–H2O2 process was studied through degrading 3-nitroaniline (3-NA) in water under microwave (MW) irradiation. The experimental conditions were studied by investigating the removal rates and reaction rate constants of 3-NA at different levels of influence factors. The removal rates and reaction rate constants both increased with the increase of Cu(II), Fe(II) and H2O2 dosages when they were at reasonable concentration ranges ([Cu(II)] 0.0016–0.0094 mmol L−1, [Fe(II)] 0.051–0.205 mmol L−1 and [H2O2] 4.34–17.34 mmol L−1). Under the examined conditions (initial pH = 5.3, [Cu(II)], [Fe(II)] and [H2O2] were 0.0078, 0.205 and 17.37 mmol L−1, respectively, P MW = 100 W, V 3-NA = 400 mL), more than 92% of 3-NA was removed at 8.5 min and the reaction rate constant reached 0.310 min−1. Furthermore, the mathematical relationship between reaction rate constants and reactants concentrations was obtained via kinetic study, the result was k=43.9·e-2905.2T·[H2O2]1.675·[Fe(II)]0.908·[Cu(II)]0.080. Finally, the probable effect of Cu(II) in Cu(II)-Fenton process under MW irradiation was speculated according to the comparison result of 2-hydroxyterephtalic acid (generated by the reaction between hydroxyl radicals and terephthalic acid) intensity, the study of synergetic effects of Cu(II) and Fe(II) in Cu(II)-Fenton process and the comparative analysis of reaction mechanisms in Fenton process and Cu(II)–H2O2 process.
    Chemical Engineering Journal 01/2015; 260:386–392. · 3.47 Impact Factor
  • ChemInform 12/2014; 45(50).
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    ABSTRACT: The TiO2 sol was added in the polysulfone (PSF) casting membrane solution to prepare polysulfone/titania hybrid membrane in this work. Then the polypiperazine–amide composite nanofiltration (NF) membranes were prepared on PSF/TiO2 hybrid membranes by interfacial polymerization. Piperazine and trimesoyl chloride were used as monomers in aqueous phase and organic phase, respectively. Different preparation conditions affecting the separation performances of NF membrane were discussed, including TiO2 sol concentration, piperazine concentration, trimesoyl chloride concentration, and reaction time. The chemical structure characterizations of polyamide composite membrane were tested by attenuated total reflectance infrared (ATR-IR). The surface images and cross sections were observed by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The addition of TiO2 sol changed the salt rejection slightly, but the water flux was three times than that of the polyamide membrane on the PSF support membrane. The polyamide NF membrane prepared under the optimum condition exhibited Na2SO4 rejection of 96.94% and water flux of 12.84 L m− 2 h− 1. According to the intercepting experiments of polyethylene glycols, the molecular weight cut-off (MWCO) of the resulting membrane was under 600 Da.
    Desalination 11/2014; 352:38–44. · 3.04 Impact Factor
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    ABSTRACT: We have developed a method to tune polarization-dependent optical absorption of large-scale chemical vapor deposition (CVD) graphene under total internal reflection (TIR) by strain engineering. Through control of the strain direction, the optical absorption of graphene for transverse magnetic or transverse electric waves can be separately tuned. Strain-induced modulation of the optical absorption has been theoretically expected when light is normally incident through graphene. Under TIR, however, we experimentally observed a significant increase in the strain-induced tunability of optical absorption for CVD graphene, with the modulation efficiency of optical absorption in monolayer graphene increasing by a factor of three times that for normal incidence. We conclude that the strain sensitivity of optical absorption of graphene under TIR offers significant potential for application in many areas such as ultra-thin optical devices and strain sensors.
    Nanotechnology 10/2014; 25(45):455707. · 3.84 Impact Factor
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    ABSTRACT: A giant Goos–Hänchen (G-H) shift in graphene has been theoretically predicted by previous research. In this Letter, we present experimental measurements of the G-H shift in graphene, in a total internal reflection condition, using a new method we have named “the beam splitter scanning method.” Our results show that a focused light source undergoes significant lateral shift when the polarization of incident light changes from transverse magnetic (TM) to transverse electric (TE) mode, indicating a large G-H shift in graphene that is polarization-dependent. We also observed that the difference in the G-H shift for TM versus TE modes (STM-STE) increases with increasing thickness of graphene material. A maximum difference (STM-STE) of 31.16 μm was observed, which is a significant result. Based on this research, the ability to engineer giant G-H shifts in graphene material has now been experimentally confirmed for the first time to the best of our knowledge. We expect that this result will lead to significant new and interesting applications of graphene in various types of optical sensors, and more.
    Optics Letters 10/2014; 39(19). · 3.39 Impact Factor
  • Shiqiang Chen, Peng Wang, Dun Zhang
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    ABSTRACT: The effect of sulfate-reducing bacteria (SRB) on corrosion behavior of copper was investigated using surface analysis and electrochemical measurements in seawater. Results demonstrated that SRB adhere onto copper surface to form biofilm and that the resulting corrosion product is mainly composed of cuprous sulfide. Cuprous sulfide and EPS are helpful for SRB adhesion on copper by providing a barrier against copper toxicity. In SRB growth cycle, corrosion rate is related to metabolic activity. Especially during exponential growth and stationary phases, SRB metabolism decreases the anodic zone area and promotes localized corrosion of copper.
    Corrosion Science 10/2014; 87:407–415. · 3.62 Impact Factor
  • Peng Wang, Dun Zhang, Zhou Lu
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    ABSTRACT: This study demonstrates the advantage of using super-hydrophobic surface as a barrier against atmospheric corrosion induced by salt deliquescence. Different from the behavior on hydrophilic and hydrophobic surfaces, deliquesced NaCl particle slips off super-hydrophobic surface inclined at an angle of ∼20°, thereby preventing corrosion of underlying substrate by deliquesced salt. The observed slipping behavior could be attributed to lubrication action of saline solution between deliquesced NaCl particle and super-hydrophobic film, as well as weak attraction between saline solution and substrate. Electrochemical measurements prove that the existence of air film contributes to the enhancement of barrier performance of super-hydrophobic film.
    Corrosion Science. 09/2014;
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    ABSTRACT: Five new coordination polymers with 4,4′-di(1H-imidazol-4-yl)biphenyl and multicarboxylate ligands have been obtained and their thermal stability, luminescence and sorption property were investigated.
    Polyhedron 09/2014; 79:239–249. · 2.05 Impact Factor
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    ABSTRACT: The crystal structures, electronic and dehydrogenation properties of TiB2 cluster-doped NaAlH4 (101) surface have been investigated by the first-principles density functional theory method. In the TiB2 cluster-doped NaAlH4 (101) surface, a Ti-centered TiB2–Al2H8–AlH5–AlH3 complex is observed, and the AlH3 and (AlH5)2− units in the TiB2–Al2H8–AlH5–AlH3 favor the first-step decomposition reaction of NaAlH4. The calculated electronic properties show that B–Ti bonds are stronger than B–Al and Ti–H bonds, which demonstrates that TiB2 does not change its configuration in catalyzing the decomposition reaction of NaAlH4. The results of hydrogen desorption energies imply that the import of TiB2 makes the strength of Al–H bonds decreases. Therefore, the removal of H atoms, especially the removal of H atoms in the Ti–H–Al bonds is easier in the TiB2 cluster-doped NaAlH4 than in pure NaAlH4.
    International Journal of Hydrogen Energy 09/2014; 39(26):14178–14183. · 3.55 Impact Factor
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    ABSTRACT: Highly selective molecularly imprinted polymers (MIPs) that absorb sulfonamides (SAs) are prepared using two types of SAs as mixed templates, 2-vinylpyridine as the functional monomer and ethylene glycol dimethacrylate as the crosslinker. The optimum combination of the mixed templates, their adsorption effect and the imprinting mechanism are evaluated based on SPE recoveries of a family of analytes, equilibrium binding, BET surface area analysis and UV. The results indicate that the mixed templates not only optimize the cavities of the MIPs but also improve the MIPs selectivity and adsorption capacity for the target analytes in aqueous solution. Therefore, MIPs are used for the quantitative analysis of SAs in fish farming water using off-line SPE coupled to HPLC/DAD. The recovery and RSD were 84.16–101.19 and 1.98–7.10%, respectively. Four SAs analytes were detected in four types of water samples in the range of 8.49–74.60 ng L−1. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41491.
    Journal of Applied Polymer Science 09/2014; · 1.40 Impact Factor
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    ABSTRACT: A novel 6-DoF 3UPS parallel manipulator (PM) with multi-fingers is proposed and its kinetostatics is studied in the light of its application. First, the proposed PM with multi-fingers is designed, and its structural characteristics are analyzed. Second, some formulae are derived for solving the displacement, linear/angular velocity and acceleration of UPS type composite active leg, the Jacobian and Hessian matrices, and the velocity, statics and acceleration of the 3UPS PM. Third, the kinematics of fingers and the workload applied on the fingers are transformed into the coordination kinematics and the active forces/torques applied onto the active legs of both the proposed PM and the fingers. Fourth, an analytic solving example of the proposed PM with three fingers is given for illustrating the application of the kinetostatic formulae. Fifth, the workspaces of the proposed PM and one finger are constructed. Finally, the analytic solutions are verified by simulation solutions.
    Mechanism and Machine Theory 08/2014; 78:36–50. · 1.21 Impact Factor
  • 08/2014; 35(8):974.
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    ABSTRACT: Although there is much controversy over the use of methylprednisolone (MP), it is one of the main drugs used in the treatment of acute spinal cord injury (SCI). The induction of the proliferation and differentiation of endogenous neural progenitor cells (NPCs) is considered a promising mode of treatment for SCI. However, the effects of MP on spinal cord-derived endogenous NPCs in a low oxygen enviroment remain to be delineated. Thus, the aim of this study was to investigate the potential effects of MP on NPCs cultured under low oxygen conditions in vitro and to elucidate the molecular mechanisms involved. Fetal rat spinal cord-derived NPCs were harvested and divided into 4 groups: 2 groups of cells cultured under normal oxygen conditions and treated with or without MP, and 2 groups incubated in 3% O2 (low oxygen) treated in a similar manner. We found that MP induced suppressive effects on NPC proliferation even under low oxygen conditions (3% O2). The proportion of nestin-positive NPCs decreased from 51.8±2.46% to 36.17±3.55% following the addition of MP and decreased more significantly to 27.20±2.68% in the cells cultured in 3% O2. In addition, a smaller number of glial fibrillary acidic protein (GFAP)-positive cells and a greater number of microtubule-associated protein 2 (MAP2)-positive cells was observed following the addition of MP under both normal (normoxic) and low oxygen (hypoxic) conditions. In response to MP treatment, hypoxia-inducible factor-1α (HIF-1α) and the Notch signaling pathway downstream protein, Hes1, but not the upstream Notch-1 intracelluar domain (NICD), were inhibited. After blocking NICD with a γ-secretase inhibitor (DAPT) MP still inhibited the expression of Hes1. Our results provide insight into the molecular mechanisms responsible for the MP-induced inhibition of proliferation and its effects on differentiation and suggest that HIF-1α and Hes1 play an important role in this effect.
    International Journal of Molecular Medicine 07/2014; · 1.96 Impact Factor
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    ABSTRACT: Excessive pollutant discharge from multi-pollution resources can lead to a rise in downriver contaminant concentration in river segments. A multi-pollution source water quality model (MPSWQM) was integrated with Bayesian statistics to develop a robust method for supporting load (I) reduction and effective water quality management in the Harbin City Reach of the Songhua River system in northeastern China. The monthly water quality data observed during the period 2005–2010 was analyzed and compared, using ammonia as the study variable. The decay rate (k) was considered a key factor in the MPSWQM, and the distribution curve of k was estimated for the whole year. The distribution curves indicated small differences between the marginal distribution of k of each period and that water quality management strategies can be designed seasonally. From the curves, decision makers could pick up key posterior values of k in each month to attain the water quality goal at any specified time. Such flexibility is an effective way to improve the robustness of water quality management. For understanding the potential collinearity of k and I, a sensitivity test of k for I2i (loadings in segment 2 of the study river) was done under certain water quality goals. It indicated that the posterior distributions of I2i show seasonal variation and are sensitive to the marginal posteriors of k. Thus, the seasonal posteriors of k were selected according to the marginal distributions and used to estimate I2i in next water quality management. All kinds of pollutant sources, including polluted branches, point and non-point source, can be identified for multiple scenarios. The analysis enables decision makers to assess the influence of each loading and how best to manage water quality targets in each period. Decision makers can also visualize potential load reductions under different water quality goals. The results show that the proposed method is robust for management of multi-pollutant loadings under different water quality goals to help ensure that the water quality of river segments meets targeted goals.
    Environmental Modelling and Software 07/2014; · 3.48 Impact Factor
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    ABSTRACT: With the Illumina BovineSNP50K BeadChip, we performed a genome-wide association study (GWAS) for two pigmentation traits in a Chinese Holstein population: proportion of black (PB) and teat colour (TC). A case–control design was used. Cases were the cows with PB <0.30 (n = 129) and TC <2 points (n = 140); controls were those with PB >0.90 (n = 58) and TC >4 points (n = 281). The RM test of roadtrips (version 1.2) was applied to detect SNPs for the two traits with 42 883 and 42 741 SNPs respectively. A total of nine and 12 genome-wide significant (P < 0.05) SNPs associated with PB and TC respectively were identified. Of these, two SNPs for PB were located within the KIT and IGFBP7 genes, and the other four SNPs were 23~212 kb away from the PDGFRA gene on BTA6; nine SNPs associated with TC were located within or 21~78.8 kb away from known genes on chromosomes 4, 11, 22, 23 and 24. By combing through our GWAS results and the biological functions of the genes, we suggest that the KIT, IGFBP7, PDGFRA, MITF, ING3 and WNT16 genes are promising candidates for PB and TC in Holstein cattle, providing a basis for further investigation on the genetic mechanism of pigmentation formation.
    Animal Genetics 07/2014; · 2.58 Impact Factor
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    ABSTRACT: Photocatalytic degradation of norfloxacin (NOR) (10 mg/L) was studied using tungsten bismuth loaded carbon iron complexes (C/Fe–Bi2WO6) under simulated solar light (SSL) irradiation in a cylindrical reactor. Three experimental parameters were chosen as independent variables: pH, C/Fe–Bi2WO6 concentration, and H2O2 concentration. A central composite experimental design (CCD) was used to establish a quadratic model as a functional relationship between the removal efficiency of NOR and the three independent variables. The optimal values of operating parameters under the related constraint conditions were found at a pH of 7.10, a C/Fe–Bi2WO6 concentration of 0.78 g/L, and a H2O2 concentration of 227 mg/L. Under the optimal conditions, the removal efficiency of NOR reached 91.66%. Regression analysis with an R2 value of 0.9728 indicated a good correlation between the experimental results and the predicted values.
    Industrial & Engineering Chemistry Research. 06/2014; 53(26):10775–10783.
  • Source
    Materials Chemistry and Physics 06/2014; 145(3):327–333. · 2.07 Impact Factor
  • International Journal of Hydrogen Energy 06/2014; 39(18):9744–9751. · 3.55 Impact Factor
  • Molecular Plant 06/2014; · 6.13 Impact Factor
  • Peng Wang, Dun Zhang, Ri Qiu, Jiajia Wu
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    ABSTRACT: Metal-complex film with super-hydrophobic property is fabricated on copper (Cu) surface with one-step electrochemical method in laurylamine/ethanol solution. “Dissolution–coordination–precipitation” model is proposed to illuminate formation mechanism of Cu(II)-laurylamine complex film. The super-hydrophobic film can act as a barrier to corrosion of underlying copper with inhibition efficiency close to 100%, and it maintains stability within a wide potential range. The origin of such corrosion protection property is explained from view point that hierarchical micro-structure of the super-hydrophobic film can maintain a stable air/liquid interface which inhibits erosion of corrosive medium.
    Corrosion Science 06/2014; 83:317–326. · 3.62 Impact Factor

Publication Stats

1k Citations
694.99 Total Impact Points

Institutions

  • 2014
    • China Agricultural University
      • College of Animal Science and Technology
      Peping, Beijing, China
    • University of Sydney
      Sydney, New South Wales, Australia
    • Fuzhou University
      • Department of Chemical Engineering
      Min-hou, Fujian, China
  • 2011–2014
    • Sun Yat-Sen University
      • • School of Life Sciences
      • • Department of Orthopaedics
      Shengcheng, Guangdong, China
    • Nankai University
      • • State Key Laboratory of Medicinal Chemical Biology
      • • College of Pharmacy
      T’ien-ching-shih, Tianjin Shi, China
  • 2010–2014
    • Chinese Academy of Sciences
      • Institute of Oceanology
      Peping, Beijing, China
    • Fushun Research Institute of Petroleum and Petrochemicals
      Fu-shan, Liaoning, China
    • Beijing Changcheng Institute of Metrology and Measurement
      Peping, Beijing, China
  • 2006–2014
    • Harbin Institute of Technology
      • • School of Municipal and Environmental Engineering
      • • Research Center for Green Chemistry and Technology
      Charbin, Heilongjiang Sheng, China
    • Anhui University
      • Department of Chemistry
      Luchow, Anhui Sheng, China
    • Nanjing University
      • • Department of Chemical Engineering
      • • Department of Chemistry
      • • State Key Laboratory of Coordination Chemistry
      Nan-ching, Jiangsu Sheng, China
  • 2013
    • The Hong Kong University of Science and Technology
      • Department of Economics
      Chiu-lung, Kowloon City, Hong Kong
    • Luzhou Medical College
      Lu-chou, Sichuan, China
  • 2012–2013
    • China University of Petroleum
      Ch’ang-p’ing-ch’ü, Beijing, China
    • Chinese Center For Disease Control And Prevention
      • Institute for Viral Disease Control and Prevention
      Peping, Beijing, China
  • 2007–2013
    • Shandong University
      • • School of Pharmaceutical Sciences
      • • State Key Laboratory for Microbial Technology
      • • State Key Laboratory for Crystal Materials
      Chi-nan-shih, Shandong Sheng, China
    • The Hong Kong Polytechnic University
      • Department of Civil and Environmental Engineering
      Hong Kong, Hong Kong
    • Government of the People's Republic of China
      Peping, Beijing, China
  • 2008–2010
    • Zhejiang University
      • Department of Physics
      Hang-hsien, Zhejiang Sheng, China
  • 2004–2009
    • Fudan University
      • • State Key Laboratory of Genetic Engineering
      • • Institute of Genetics
      Shanghai, Shanghai Shi, China