两种加料方式下ZnAl-LDHs生长机理研究
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摘要
含多种金属离子的盐溶液和碱溶液的滴加混合方式会影响反应过程中金属离子的反应活性,进而改变材料的生长过程。分别采用单滴和双滴加料法制备了Zn Al-LDHs。并利用XRD、SEM、FTIR等手段进行表征。在两种加料方式下,研究了加热方式、滴加温度对样品结构、物相、形貌和尺寸的影响。同时探讨了加料方式对Zn Al-LDHs生长的作用机理。研究结果表明:双滴法加料和水浴加热有利于制备单一物相的Zn Al-LDHs片状结构;水热处理易产生ZnO,不利于制备Zn Al-LDHs。
The dropping methods of metal salt and alkali solution affect the reaction activity of metal ions and then change the growth process of samples.Zn Al-LDHs were prepared by single dropping method and double dropping method,which were characterized by XRD,SEM and FTIR.The effect of dropping method,dropping temperature and heating method on the structure,phase,morphology and size of Zn AlLDHs were investigated.The experimental results show that double dropping method and water bath heating are in favor of the growth of single phase Zn Al-LDHs sheets.While hydrothermal treating led to the formation of ZnO.
The dropping methods of metal salt and alkali solution affect the reaction activity of metal ions and then change the growth process of samples.Zn Al-LDHs were prepared by single dropping method and double dropping method,which were characterized by XRD,SEM and FTIR.The effect of dropping method,dropping temperature and heating method on the structure,phase,morphology and size of Zn AlLDHs were investigated.The experimental results show that double dropping method and water bath heating are in favor of the growth of single phase Zn Al-LDHs sheets.While hydrothermal treating led to the formation of ZnO.
引文
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[2]Zhou L,Huang X,Chen H,et al.A high surface area flower-like Ni-Fe layered double hydroxide for electrocatalytic water oxidation reaction[J].Dalton Trans.,2015,44:11592-11600.
[3]Zhang T,Li Q,Xiao H,et al.Synthesis of Li-Al layered double hydroxides(LDHs)for efficient fluoride removal[J].Ind.Eng.Chem.Res.,2012,51(35):11490-11498.
[4]郭科,段巍卓,王晓东,等.微波法合成乙二醇插层镍铝层状双金属氢氧化物[J].应用化学,2016,33(1):84-91.
[5]邵蒙蒙,蒋军辉,夏盛杰,等.含Sn水滑石可见光催化降解对氯苯酚的研究[J].无机材料学报,2016,31(1):7-13.
[6]Velu S,Suzuki K,Hashimoto S,et al.The effect of cobalt on the structural properties and reducibility of Cu Co Zn Al layered double hydroxides and their thermally derived mixed oxides[J].J.Mater.Chem.,2001,11:2049-2060.
[7]Sankaranarayanan S,Sharma A,Srinivasan K.Co Cu Al layered double hydroxides-efficient solid catalysts for the preparation of industrially important fatty epoxides[J].Catal.Sci.Technol.,2015,5:1187-1197.
[8]王卫伟,许英伟,杜健,等.Fe3O4/LDHs复合结构的制备及吸附性能研究[J].人工晶体学报,2015,44(1):204-209.
[9]陆桂焕,贺鸣,卢红,等.纳米Si O2和Mg Al-SDBS-LDHs在聚丙烯中的协同分散及协效阻燃性能研究[J].材料导报,2015,29(4):62-67.
[10]Xue X,Gu Q,Pan G,et al.Nanocage structure derived from sulfonatedβ-Cyclodextrin intercalated layered double hydroxides and selective adsorption for phenol compounds[J].Inorg.Chem.,2014,53:1521-1529.
[11]Jan T,Iqbal J,Ismail M,et al.Eradication of multi-drug resistant bacteria by Ni doped Zn O nanorods:structural,raman and optical characteristics[J].Applied Surface Science,2014,308:75-81.
[12]Ma R,Liu Z,Takada K,et al.Synthesis and exfoliation of Co2+-Fe3+layered double hydroxides:an innovative topochemical approach[J].J.Am.Chem.Soc.,2007,129:5257-5263.
[13]Pushparaj S,Forano C,Prevot V,et al.How the method of synthesis governs the local and global structure of zinc aluminum layered double hydroxides[J].J.Phys.Chem.C,2015,119:27695-27707.
[14]Li T,Li G,Li L,et al.Large-scale self-assembly of 3D flower-like hierarchical Ni/Co-LDHs microspheres for high-performance flexible asymmetric supercapacitors[J].ACS Appl.Mater.Interfaces,2016,8:2562-2572.
[15]Liang D,Yue W,Sun G,et al.Direct synthesis of unilamellar Mg Al-LDH nanosheets and stacking in aqueous solution[J].Langmuir,2015,31:12464-12471.
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