改性MMT/ZnO/GQDs纳米复合材料的制备及其抗菌性能
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摘要
采用水浴法制备改性MMT/ZnO/GQDs纳米复合材料,以蒙脱土(MMT)作为氧化锌(ZnO)/石墨烯复合量子点的载体,有效防止纳米粒子的团聚,同时抑制ZnO量子点表面光生电子和空穴的复合,系统地研究了改性剂种类、MMT用量等对复合材料抗菌性能的影响.通过扫描电子显微镜(SEM)、X射线粉末衍射仪(XRD)等对所得产物的组分、形貌和结构进行表征.结果表明:采用十八烷基三甲基氯化铵(OTAC)改性MMT制备的复合材料比采用十六烷基三甲基溴化铵(CTAB)改性MMT及未改性MMT制备的复合材料具有更优异的抗菌性能,当改性MMT/ZnO/GQDs复合材料中MMT与Zn的比例为12%时,其抗菌性能最佳,最小抑菌浓度达到1.8mg/mL.
In this study,the modified MMT/ZnO/GQDs nanocomposites were prepared by water bath method with MMT as the carrier of ZnO/Graphene quantum dots conjugates to avoiding agglomeration of particles.The addition of graphene quantum dots(GQDs)could effectively suppress the combination of electrogenerated electrons and holes on the surface of ZnO.The effects of modifier's type and the amount of MMT on the antibacterial properties of the composites were investigated in detail.The composition,morphology and structure of the obtained reaction products were characterized by scanning electron microscopy(SEM),X-ray powder diffractometry(XRD).The results showed that the composites prepared by octadecyltrimethylammonium chloride(OTAC)modified MMT has more excellent antibacterial properties than that prepared with cetyltrimethylammonium bromide(CTAB)modified MMT and unmodified MMT.The Modified MMT/ZnO/GQDs composites indicated the superior antibacterial properties with the minimum inhibitory concentration was 1.8 mg/ml when the ratio of MMT to Zn in 12%.
In this study,the modified MMT/ZnO/GQDs nanocomposites were prepared by water bath method with MMT as the carrier of ZnO/Graphene quantum dots conjugates to avoiding agglomeration of particles.The addition of graphene quantum dots(GQDs)could effectively suppress the combination of electrogenerated electrons and holes on the surface of ZnO.The effects of modifier's type and the amount of MMT on the antibacterial properties of the composites were investigated in detail.The composition,morphology and structure of the obtained reaction products were characterized by scanning electron microscopy(SEM),X-ray powder diffractometry(XRD).The results showed that the composites prepared by octadecyltrimethylammonium chloride(OTAC)modified MMT has more excellent antibacterial properties than that prepared with cetyltrimethylammonium bromide(CTAB)modified MMT and unmodified MMT.The Modified MMT/ZnO/GQDs composites indicated the superior antibacterial properties with the minimum inhibitory concentration was 1.8 mg/ml when the ratio of MMT to Zn in 12%.
引文
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[9]Liu.J.L,Rojas Andrade.M.D,Peng.Y,et al.Photo-enhanced antibacterial activity of ZnO/GrapheneQuantum dot nanocomposites[J].Nanoscale,2018,10(1):158-166.
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[11]Wang.J.G,Cao.S,Ding.Y,et al.Theoretical investigations of optical origins of fluorescent graphene quantum dots[J].Sci.Re.,2016,6(1):24 850-24 854.
[2]Han C,Yang M Q,Weng B.Improving the photocatalytic activity and anti-photocorrosion of semiconductor ZnO by coupling with versatile carbon[J].Physical Chemistry Chemical Physics 2014,32(16):16 891-16 903.
[3]Chandan P,Johan B P,Erik K,et al.The structure and diversity of human,animal and environmental resistomes[J].Microbiome,2016,54(4):1-15.
[4]Chen.M,Hu.L.F,Xu.J.X.ZnO hollow-sphere nanofilm based high performance and low-cost photodetector[J].Small,2011,17(7):2 449-2 453.
[5]Liu.H.L,Yang.J.H,Zhang.Y.J.Structure and magnetic properties of Fe-doped ZnO prepared by the sol-gel method[J].Journal of Physics:Condensed Matter,2009,21(14):1 118-1 129.
[6]wang.D.K,M.S.Oh.ZnO-based light-emitting metal-insulator-semiconductor diodes[J].Applied Physics Letters,2007,91(12):1-33.
[7]Hsu.S.H,Lin.Y.Y,Huang.S,et al.Synthesis of waterdispersible zinc oxide quantum dots with antibacterial activity and low cytotoxicity for cell labelin[J].Nanotechnology,2013,47(24):475 102-475 112.
[8]Zhu.Y.P,Ma.T.Y,Ren.T.Z,et al.Highly dispersed photoactive zinc oxide nanoparticles on mesoporous phosphonated titania hybrid[J].Appl.Catal.B-Environ.,2014,156:44-52.
[9]Liu.J.L,Rojas Andrade.M.D,Peng.Y,et al.Photo-enhanced antibacterial activity of ZnO/GrapheneQuantum dot nanocomposites[J].Nanoscale,2018,10(1):158-166.
[10]Kuo.W.S,Chang.C.Y,Chen.H.H,et al.Two photon photoexcited photodynamic therapy and contrast agent with antimicrobial graphene quantum dots[J].ACS Appl.Mater.Inter.,2016,44(8):30 467-30 474.
[11]Wang.J.G,Cao.S,Ding.Y,et al.Theoretical investigations of optical origins of fluorescent graphene quantum dots[J].Sci.Re.,2016,6(1):24 850-24 854.