A STUDY OF DYNAMIC BEHAVIOR AND PHASE SEPARATION OF POLYACRYLIC GELS Ju Zuo , Fa-jun Zhang, Ying-li An, Ai-zhen Niu, Zhi-guang Zhang, Fang-xing Li, Chang-ying Zhu and Bing-lin HeThe State Key Laboratory of Functional ...A STUDY OF DYNAMIC BEHAVIOR AND PHASE SEPARATION OF POLYACRYLIC GELS Ju Zuo , Fa-jun Zhang, Ying-li An, Ai-zhen Niu, Zhi-guang Zhang, Fang-xing Li, Chang-ying Zhu and Bing-lin HeThe State Key Laboratory of Functional Polymeric Materials for Adsorption and Separation, Department of Chemistry, Nankai University, Tianjin 300071Dynamic behavior and phase separation sensitive to temperature of a series of polyacrylic gels was studied by dynamic light scattering. The dynamic behavior of the gels is characterized in terms of the correlation lengthξand diffusion coefficient D. The rules of the influence of cross-linking degree, concentration of polymer and amount of initiator on ξand D were obtained. When cross-linking degree increases, ξdecreases and D展开更多
Manganese ferrite(MnFe_(2)O_(4))has the advantages of simple preparation,high resistivity,and high crystal symmetry.Herein,we have developed an electrochemical sensor utilizing graphene and MnFe_(2)O_(4) nanocomposite...Manganese ferrite(MnFe_(2)O_(4))has the advantages of simple preparation,high resistivity,and high crystal symmetry.Herein,we have developed an electrochemical sensor utilizing graphene and MnFe_(2)O_(4) nanocomposites modified glassy carbon electrode(GCE),which is very efficient and sensitive to detect bisphenol A(BPA).MnFe_(2)O_(4)/graphene(GR)was synthesized by immobilizing the MnFe_(2)O_(4) microspheres on the graphene nanosheets via a simple one-pot solvothermal method.The morphology and structure of the MnFe_(2)O_(4)/GR nanocomposite have been characterized through scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).In addition,electrochemical properties of the modified materials are comparably explored by means of cyclic voltammetry(CV),electrochemical impedance spectroscopy(EIS)and differential pulse voltammetry(DPV).Under the optimal conditions,the proposed electrochemical sensor for the detection of BPA has a linear range of 0.8-400μmol/L and a detection limit of 0.0235μmol/L(S/N=3)with high sensitivity,good selectivity and high stability.In addition,the proposed sensor was used to measure the content of BPA in real water samples with a recovery rate of 97.94%-104.56%.At present,the synthesis of MnFe_(2)O_(4)/GR provides more opportunities for the electrochemical detection of BPA in practical applications.展开更多
文摘A STUDY OF DYNAMIC BEHAVIOR AND PHASE SEPARATION OF POLYACRYLIC GELS Ju Zuo , Fa-jun Zhang, Ying-li An, Ai-zhen Niu, Zhi-guang Zhang, Fang-xing Li, Chang-ying Zhu and Bing-lin HeThe State Key Laboratory of Functional Polymeric Materials for Adsorption and Separation, Department of Chemistry, Nankai University, Tianjin 300071Dynamic behavior and phase separation sensitive to temperature of a series of polyacrylic gels was studied by dynamic light scattering. The dynamic behavior of the gels is characterized in terms of the correlation lengthξand diffusion coefficient D. The rules of the influence of cross-linking degree, concentration of polymer and amount of initiator on ξand D were obtained. When cross-linking degree increases, ξdecreases and D
基金Project(2108085ME184)supported by the Natural Science Foundation of Anhui Province,ChinaProject(2022AH010019)supported by the Innovation Team Project of Anhui Provincial Department of Education,China+1 种基金Project(GXXT-2021-057)supported by the Collaborative Innovation Project of Anhui Provincial Department of Education,ChinaProject(2020QDZ36)supported by the Doctoral Scientific Research Startup Foundation of Anhui Jianzhu University,China。
文摘Manganese ferrite(MnFe_(2)O_(4))has the advantages of simple preparation,high resistivity,and high crystal symmetry.Herein,we have developed an electrochemical sensor utilizing graphene and MnFe_(2)O_(4) nanocomposites modified glassy carbon electrode(GCE),which is very efficient and sensitive to detect bisphenol A(BPA).MnFe_(2)O_(4)/graphene(GR)was synthesized by immobilizing the MnFe_(2)O_(4) microspheres on the graphene nanosheets via a simple one-pot solvothermal method.The morphology and structure of the MnFe_(2)O_(4)/GR nanocomposite have been characterized through scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).In addition,electrochemical properties of the modified materials are comparably explored by means of cyclic voltammetry(CV),electrochemical impedance spectroscopy(EIS)and differential pulse voltammetry(DPV).Under the optimal conditions,the proposed electrochemical sensor for the detection of BPA has a linear range of 0.8-400μmol/L and a detection limit of 0.0235μmol/L(S/N=3)with high sensitivity,good selectivity and high stability.In addition,the proposed sensor was used to measure the content of BPA in real water samples with a recovery rate of 97.94%-104.56%.At present,the synthesis of MnFe_(2)O_(4)/GR provides more opportunities for the electrochemical detection of BPA in practical applications.
