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Adsorption property of congo red from aqueous solution by Cu-BTC/SiO2 composite

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Abstract

The adsorption behavior of congo red from aqueous solution on Cu-BTC/SiO2 was investigated. Cu-BTC/SiO2 with mesoporous structure and large surface area was prepared by loading Cu-BTC into the mesoporous silica using in-situ synthesis method. The X-ray diffraction, scanning electron microscopy, and nitrogen adsorption–desorption analysis were used to characterize the structure and morphology of the prepared materials. The adsorption studies showed that the adsorption isotherm of congo red on Cu-BTC/SiO2 fitted well with Freundlich adsorption model and congo red is easy to be adsorbed by Cu-BTC/SiO2. The thermodynamic study showed that the adsorption behavior of congo red on Cu-BTC/SiO2 is an exothermic process at temperature under investigation.

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Acknowledgements

This work is supported by the Science and Technology Department Research Funds of Shannxi Province, China (2018GY-131) and Research and Development Program of Beilin District, Xi’an, China (GX1808) and National Natural Science Foundation of China (21703165).

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Authors and Affiliations

  1. College of Chemistry and Environmental Engineering, Xi’an Polytechnic University, Xi’an, China

    Wei Chang, Dandan Zheng, Chaosheng Zhao & Yanping Du

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  1. Wei Chang
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  2. Dandan Zheng
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  3. Chaosheng Zhao
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  4. Yanping Du
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Correspondence to Wei Chang.

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Chang, W., Zheng, D., Zhao, C. et al. Adsorption property of congo red from aqueous solution by Cu-BTC/SiO2 composite. Monatsh Chem 151, 319–324 (2020). https://doi.org/10.1007/s00706-020-02562-0

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  • DOI: https://doi.org/10.1007/s00706-020-02562-0

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