碱性环境下二维纳米AlOOH聚集体形态及“生长基元”运动  

The Aggregates Form of Two-dimension Nano AlOOH and the Growth Unit Model in Alkaline Environment

作　　者：郝保红[1] 纪艳娇[1] 刘东阳[1] 

机构地区：[1]北京石油化工学院机械工程系,北京102617

出　　处：《北京石油化工学院学报》2011年第3期12-15,共4页Journal of Beijing Institute of Petrochemical Technology

摘　　要：通过构建酸性水热环境条件下的AlOOH"生长基元"模型,揭示了酸性环境下晶体一维成长的机理。构建碱性水热条件下的"生长基元"模型,从原子层面揭示AlOOH发生二维片状定向生长的机理。重点分析pH=10,13条件下的纳米AlOOH的"聚集体"特点以及生长基元运动方式。用实验样品直接验证所构建模型的合理性。并通过X衍射结果佐证不同pH条件下的聚集体形态的存在,并验证了纳米AlOOH的Al 3+双聚体[Al3(OH)4(OH2)9]5+﹑[Al3(OH)5(OH2)8]4+﹑[Al3(OH)6(OH2)7]3+的存在。The preceding paper discovered the mechanism of the one-dimensional growth of crystal in an acid environment by establishing the model of growth unit of A1OOH during the acidic hydrothermal process. While this paper continues to establish the model of growth units during the alkaline hydrothermal process and to discover the mechanisms of the two-dimensional lamellate-oriented growth of A1OOH＇s from the perspective of atomic. The present paper puts an emphasis on analyzing both the characteristics of the nano-A1OOH＇s aggregates in the conditions of pH= 10 and pH = 13 and the mode of the motion of growth units. The rationality of the established model is directly proved by the test samples. Furthermore, the existence of the aggregates form and the Al＋3＇s dimers of [Al3（OH）4（OH2）9]5＋、[Al3（OH）5（OH2）8]4＋、[Al3（OH）6（OH2）7]3＋of the nano-A1OOH are corroborated with the help of the results of the X- diffraction in diverse pH conditions.

关 键 词：二维纳米 A100H 碱性环境 原子聚集体 生长基元 

分 类 号：TG174[金属学及工艺—金属表面处理]