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Fabrication of layered double hydroxide spheres through urea hydrolysis and mechanisms involved in the formation

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Abstract

The goal of this study is to prepare hydrotalcite pellets and validate their potential utility in catalysts and catalysts support. Hydrotalcite pellets were synthesized by urea hydrolysis. Urea hydrolysis can provide both carbonate as the intercalated anion and hydroxyl anions to form Mg–Al layered double hydroxide (LDH) with carbonate intercalation. Urea hydrolysis was also used to generate NH3 which plays a critical role in the process of synthesis hydrotalcite pellets. Mechanism of the formation hydrotalcite pellets was also discussed. The as-prepared samples were well characterized by X-ray diffraction, scanning electron microscopy, transmission electronic microscope, N2 adsorption/desorption, and Fourier transform infrared spectroscopy, respectively. The results revealed that the hydrotalcite pellets were well-crystallized and formed by self-assembly of hexagonal platelets LDHs. The present work suggests that it is possible to grow hydrotalcite pellets directly through one-step aqueous solution-phase chemical route under controlled conditions.

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Acknowledgement

This work was supported by the Fundamental Research Funds of the Central University (HEUCF101010), the Key Technology R&D program of Heilongjiang Province (No.G202A423, No.TB06A05) and Science Fund for Young Scholar of Harbin City (No.2008RFQXG028).

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Authors and Affiliations

  1. College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, People’s Republic of China

    Jun Wang, Dandan Li, Milin Zhang & Xiaoyan Jing

  2. The Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin, 150001, People’s Republic of China

    Jun Wang & Milin Zhang

  3. Maoming University, Maoming Municipality, Guangdong Province, 525000, People’s Republic of China

    Xiang Yu

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  1. Jun Wang
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  2. Dandan Li
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  3. Xiang Yu
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Correspondence to Jun Wang.

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Wang, J., Li, D., Yu, X. et al. Fabrication of layered double hydroxide spheres through urea hydrolysis and mechanisms involved in the formation. Colloid Polym Sci 288, 1411–1418 (2010). https://doi.org/10.1007/s00396-010-2271-1

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  • DOI: https://doi.org/10.1007/s00396-010-2271-1

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