Large-scale synthesis and formation mechanism study of basic aluminium sulfate microcubic crystals

Literature Information

Publication Date 2014-02-03
DOI 10.1039/C4CP00090K
Impact Factor 3.676
Authors

Yuguo Xia, Bo Chen, Xiuling Jiao, Dairong Chen


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Abstract

Cube-like basic aluminium sulfate crystals were prepared by a facile template-free hydrothermal strategy. The microstructures, morphologies and textural properties of as-synthesized material were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy. X-ray crystallography reveals that cubic basic aluminium sulfate possesses a single crystal nature. Chemical formation mechanism studies of sulfuric acid with γ-AlOOH were performed using a combined experimental and computational approach. Time dependent experiments reveal that formation of basic aluminium sulfate is based on the dissolution–recrystallization process, and the source of Al3+ is from the dissolution of γ-AlOOH at high H+ concentration. Moreover, the quantum mechanical calculations reveal that dramatic structural changes occurred in the (100) plane at high H+ concentration, which is inferred to be the initiation of the source of Al3+. Meanwhile, surface energy calculations can well explain the exposed plane of basic aluminium sulfate microcubes, which are consistent with the XRD results. Besides, equations to quantitatively describe the relationship between the molar amount of H+ and the final phase are proposed, which has been confirmed by experimental results.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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