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构建了水热体系中AlOOH的结晶生长过程模型,首次从生长基元的角度研究了晶体结晶过程,深入原子层面揭示异形纳米AlOOH最终形貌形成的成因,从本质上解释水热环境pH值对结晶过程及最终形貌的影响机理,重点分析了不同pH条件下AlOOH的Al3+聚集体形态.根据[Al3(OH)4(OH2)9]5+及[Al3(OH)5(OH2)8]4+,[Al3(OH)6(OH2)7]3+等的配位特点,揭示了AlOOH定向生长为一维晶须和二维片状或三维颗粒的本质.用实验样品的形貌图像直接验证了所建模型的合理性,并用X射线衍射和红外光谱检测印证了不同pH条件下的聚集体形态及生长基元模型的正确性.
The crystal growth process model of AlOOH in hydrothermal system was established. The crystal crystallization process was studied for the first time from the perspective of growth element, and the formation of the final morphology of heterogeneous nano AlOOH was revealed at the atomic level. From the nature of the hydrothermal environment, (Al3 (OH) 4] 5+ and [Al3 (OH) 5 (OH2) 8] in the presence of AlOOH at different pHs were investigated. 4 Al (OH) 6] 3+, reveal the nature of AlOOH directional growth as one-dimensional whiskers and two-dimensional flake or three-dimensional particles.Using the morphology of the experimental samples The rationality of the model was validated directly. The results of X-ray diffraction and infrared spectroscopy confirmed the correctness of aggregate morphology and cell growth model under different pH conditions.