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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 mechanism of one-dimensional growth of crystals in acid environment was revealed by constructing a model of “growth element” under acidic and hydrothermal conditions. The “growth primitive” model under alkaline hydrothermal conditions was constructed to reveal the mechanism of two-dimensional sheet-oriented growth of AlOOH from the atomic level. The characteristics of the “aggregates” of nano-AlOOH and the movement of growth units under the conditions of pH = 10 and 13 were analyzed emphatically. The experimental sample is used to directly verify the rationality of the constructed model. The existence of aggregates in different pH conditions was confirmed by X-ray diffraction. The Al 3+ dimers [Al 3 (OH) 4] 5 +, [Al 3 (OH) 5 OH2) 8] 4 +, [Al3 (OH) 6 (OH2) 7] 3+.