浸渍-热分解法制备荷正电微孔陶瓷膜
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摘要
以微孔硅藻土陶瓷膜为基膜,YCl_3和NaOH反应制备的纳米Y_2O_3为荷电剂,经浸渍-热分解法制备荷正电微孔陶瓷膜.通过TGA、SEM、EDS、Zeta电位分析等手段对其组成和结构进行表征.结果显示,制备荷电剂的煅烧温度为700℃时,前驱体完全转化为纳米Y_2O_3,平均粒径约为118nm,且Y_2O_3晶粒生长良好;荷电膜微孔结构保持良好,纳米Y_2O_3均匀地附着在基膜表面;荷电膜在pH为4~8范围内带正电性,其等电点为8.11.荷电膜的正电性能预示着其在去除水中带负电荷的细菌、病毒及有机染料等方面具有很大的应用前景.
By the way of dipping-thermal decomposition, positively charged microporous ceramic membranes were prepared in this study which selected microporous diatomite as based-membrane and nanoY_2O_3 as charged agent.Nano-Y_2O_3 was synthesized through the reaction of YCl_3 and NaOH.The composition and structure of charged membrane were characterized by TGA、XRD、SEM、EDS、Zeta potential and so on.These results indicated that the precursor completely transformed into nano-Y_2O_3 with average particle size 118 nm when calcined at 700 ℃.The crystal of nano-Y_2O_3 grew well.Pore structure of charged membrane kept fine.And nano-Y_2O_3 attached uniformly on the membrane surface.In the pH range of 4~8,charged membrane with an isoelectric point of 8.11 possessed strongly positive electricity.The positive performance of charged membrane predicts a great application prospect in terms of removing negative charged microorganism,bacteria,viruses and organic dyes and so on.
By the way of dipping-thermal decomposition, positively charged microporous ceramic membranes were prepared in this study which selected microporous diatomite as based-membrane and nanoY_2O_3 as charged agent.Nano-Y_2O_3 was synthesized through the reaction of YCl_3 and NaOH.The composition and structure of charged membrane were characterized by TGA、XRD、SEM、EDS、Zeta potential and so on.These results indicated that the precursor completely transformed into nano-Y_2O_3 with average particle size 118 nm when calcined at 700 ℃.The crystal of nano-Y_2O_3 grew well.Pore structure of charged membrane kept fine.And nano-Y_2O_3 attached uniformly on the membrane surface.In the pH range of 4~8,charged membrane with an isoelectric point of 8.11 possessed strongly positive electricity.The positive performance of charged membrane predicts a great application prospect in terms of removing negative charged microorganism,bacteria,viruses and organic dyes and so on.
引文
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[12]Bouguen A,Chaufer B,Rabiller-Baudry M,et al.Enhanced retention of neutral solute and charged solute with NF inorganic membrane by chemical grafting and physic-chemical treatment[J].Sep Purif Technol,2001,25:513-521.
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[15]廖列文,尹国强,崔英德,等.均匀沉淀法合成纳米Y2O3研究[J].稀土,2005,35(6):41-45.
[16]刘婕妤,余锡宾,卢一鸣,等.不同反应时间和浓度对氢氧化钇/氧化钇粉末结构的影响[J].广东化工,2010,37(3):52-54.
[2]李红宾,王薇,杜启云.荷电膜的研究进展[J].高分子通报,2009,22(8):32-37.
[3]Deng C,Zhu M F,Chen P,et al.Preparation and characterization of positively charged porous ceramic membrane[J].Mater Res Innov,2015,19(S1):335-338.
[4]Kattamuri N,Shin J,Kang B,et al.Development and surface characterization of positively charged filters[J].J Mater Sci,2005,40:4531-4539.
[5]Gerba C.Applied and theoretical aspects of virus adsorption to surfaces[J].Adv Appl Microbiol,1984,30:133-168.
[6]Vasuhdivan V,Farrah S,Preston D,et al.Use of modified diatomaceous earth for removal and recovery of viruses in water[J].Appl Environ Microbiol,1991,57:2502-2506.
[7]Sobsey M,Jones B.Concentration of poliovirus from tap water using positively charged microporous filters[J].Appl Environ Microbiol,1979,37:588-595.
[8]朱孟府,龚承元,苏建勇,等.荷电微孔滤膜对水中达旦黄吸附性能的研究[J].工业水处理,2001,21(7):23-25.
[9]朱孟府,邓橙,宿红波,等.荷电微孔陶瓷膜在应急饮水净化中的应用研究[J].膜科学与技术,2013,33(3):1-4.
[10]吴也凡,罗凌虹,石纪军,等.ZrO2纳米晶涂层修饰改性的陶瓷微滤膜性能[J].稀有金属材料与工程,2009,38(2):631-634.
[11]周健儿,吴建青,汪永清,等.纳米TiO2涂层对Al2O3微滤膜的改性研究[J].无机材料学报,2006,21(3):725-730.
[12]Bouguen A,Chaufer B,Rabiller-Baudry M,et al.Enhanced retention of neutral solute and charged solute with NF inorganic membrane by chemical grafting and physic-chemical treatment[J].Sep Purif Technol,2001,25:513-521.
[13]Wegmann M,Michen B,Luxbacher T,et al.Modification of ceramic microfilters with colloidal zirconia to promote the adsorption of viruses from water[J].Water Res,2008,42:1726-1734.
[14]Wegmann M,Michen B,Graule T.Nanostructured surface modification of microporous ceramics for efficient virus filtration[J].J Eur Ceram Soc,2008,28:1603-1612.
[15]廖列文,尹国强,崔英德,等.均匀沉淀法合成纳米Y2O3研究[J].稀土,2005,35(6):41-45.
[16]刘婕妤,余锡宾,卢一鸣,等.不同反应时间和浓度对氢氧化钇/氧化钇粉末结构的影响[J].广东化工,2010,37(3):52-54.