Abstract
Using diatomite (DE) as the micro-reactor and carrier, the diatomite/AlOOH porous humidity control material (DE/A) was prepared via joint hydrolytic precipitation and hydrothermal treatment. The samples obtained were thoroughly characterized by XRD, ICP-MS, FTIR, nitrogen adsorption, MIP, fractal theory, SEM, EDS, TEM and contact angle for reaction mechanism, surface properties, pore structure, fractal character, and morphology analysis. The humidity control performance and reusability of samples were tested. The thermodynamics analysis was also investigated according to Clausius–Clapeyron equation. The results indicated that DE/A showed a better humidity control performance than DE under different relative humidity and temperature. DE/A also showed good reusability. Humidity control performance of DE was significantly improved with the increasing of mesoporous and hydroxyl content. The structure heterogeneity and surface energy of DE were enhanced. A more reasonable pore size distribution had formed in the DE. Van der Waals force and hydrogen bonds are the main forces for humidity control.
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Acknowledgements
We are grateful for the financial support from the National Science Foundation of China (Grant Nos. 51804262), the Sichuan Science and Technology Program (Grant Nos. 2021YJ0057 and 2021YFG0268).
Funding
Projects (51804262) supported by the National Natural Science Foundation of China, Projects (2021YJ0057, 2021YFG0268) supported by the Sichuan Science and Technology Program of China.
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Hu, Z., Zheng, S., Li, Y. et al. Synthesis of a novel porous diatomite/AlOOH composite material and its humidity control performance. Chem. Pap. 76, 3909–3918 (2022). https://doi.org/10.1007/s11696-022-02131-1
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DOI: https://doi.org/10.1007/s11696-022-02131-1