采用酸性溶胶法制备钛柱撑前驱物,将该前驱物于500 ℃下焙烧3 h得到焙烧产物.使用XRD、FTIR和SEM等对柱撑产物的性能进行表征和分析,同时研究柱化反应的影响因素.结果表明:在一定范围内增大柱撑剂酸碱比、提高柱撑温度以及加入适量碱,有利于插层复合反应的进行和锐钛晶型的生长;柱撑前驱物焙烧后TiO2晶粒长大,同时焙烧引起的脱水导致膨润土层间距的下降;为获得较理想的产物,合适的柱化条件为:柱撑剂酸碱比n(NaOH):n(HNO3)为1:3、柱撑温度65 ℃和柱撑液加碱量为(2 mol/L NaOH) 6 mL.
参考文献
| [1] | DEW V .Pillared interlayered clay materials useful as catalysts and sorbents[P].US 4176090,1979. |
| [2] | PINNAVAIA T J .Intercalated clay catalysts[J].Science,1983,220(4595):365-371. |
| [3] | SYCHEV M;SHUBINA T;ROZWADOWSKI M;SOMMEN A P B DE BEER V H J VAN SANTEN R A .Characterization of the microporosity of chromia and titania-pillared montmorillonites differing in the pillar density[J].Microporous and Mesoporous Materials,2000,37(12):187-200. |
| [4] | 吴平霄,叶代启,明彩兵.柱撑粘土矿物层间域的性质及其环境意义[J].矿物岩石地球化学通报,2002(04):228-233. |
| [5] | 陈金媛,彭图治,肖燕风.高效二氧化钛/膨润土复合材料的制备及光催化性能研究[J].化学学报,2003(08):1311-1315. |
| [6] | LONG R Q;YANG R T .Catalytic performance and characterization of VO2C-exchanged titania-pillared clays for selective catalytic Reduction of nitric oxide with ammonia[J].Journal of Catalysis,2000,196(07):73-85. |
| [7] | OOKA C;YOSHIDA H;HORIO M .Adsorptive and photocatalytic performance of TiO2 pillared montmorillonite in degradation of endocrine disruptors having different hydrophobicity[J].Applied Catalysis B:Environmental,2003,41:313-321. |
| [8] | Pernyeszi T.;Dekany I. .Photocatalytic degradation of hydrocarbons by bentonite and TiO2 in aqueous suspensions containing surfactants[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2003(1/3):191-199. |
| [9] | Neelam Jagtap;Veda Ramaswamy .Oxidation of aniline over titania pillared montmorillonite clays[J].Applied clay science,2006(2):89-98. |
| [10] | Zhenshi Sun;Yingxu Chen;Qiang Ke;Ye Yang;Jun Yuan .Photocatalytic degradation of cationic azo dye by TiO_2/bentonite nanocomposite[J].Journal of Photochemistry and Photobiology, A. Chemistry,2002(1/3):169-174. |
| [11] | Liqin Xiang;Xiaopeng Zhao .Preparation of montmorillonite/titania nanocomposite and enhanced electrorheological activity[J].Journal of Colloid and Interface Science,2006(1):131-140. |
| [12] | 钱东,闫早学,石毛,陈启元,卢周广,黄可龙,刘咏.溶胶-凝胶法制备TiO2纳米颗粒及其光催化性能[J].中国有色金属学报,2005(05):817-822. |
| [13] | 姜桂兰;张培萍.膨润土加工与应用[M].北京:化学工业出版社,2005:17-20. |
| [14] | BUKKA K;MILLER J D;SHABTAI J .FTIR study of deuterated montmorillonite structional features relevant to pillared clay stability[J].Clays and Clay Minerals,1992,40(01):92-102. |
| [15] | 叶玲;黄继泰;戴劲草;肖子敬 .离子交换条件对蒙脱石表面酸性的影响[J].华侨大学学报(自然科学版),1998,19(04):371-374. |
| [16] | 赵杏媛;张有瑜.粘土矿物与粘土矿物分析[M].北京:海洋出版社,1990 |
| [17] | ZHANG Y;QIANG M;LIU Z et al.Synthesis of a large basal spacing of Ti-pillared montmorillonite[J].Materials Technology,2005,20(01):34-39. |
| [18] | 李湘祁,汤德平,翁国坚.TiO2柱撑蒙脱石的X射线衍射和扫描电镜研究[J].福建地质,2003(01):33-36. |
| [19] | Song SX;Zhang YM;Liu T;Zhang M .Beneficiation of montmorillonite from ores by dispersion processing[J].Journal of Dispersion Science and Technology,2005(3):375-379. |
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