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Partially reduced CeO2/C@CNT with high oxygen vacancy boosting phosphate adsorption as CDI anode by Hengfeng Qian; Jianmao Yang; Bin Hu; Boshuang Zhang; Yiwen Wang; Jianyun Liu is a Engineering article available to read on EtoBox.

What is Partially reduced CeO2/C@CNT with high oxygen vacancy boosting phosphate adsorption as CDI anode about?

Phosphorus in water is the main inducement for eutrophication and deterioration of water quality. Cerium oxide has excellent adsorption ability for phosphate, but its activity and conductivity need to be improved for capacitive deionization (CDI) application. Herein, a carbon nanotube (CNT)-twined CeO2/C composite was synthesized by in-situ growth of Ce-BTC in CNT matrix followed by carbonization. The ultrafine CeO2 particles were uniformly dispersed in carbon matrix, improving the electrical conductivity and effective active sites. Via hydrazine reduction, the content of Ce(III) and oxygen vacancy of the obtained CeO2/C-R@CNT were enhanced, boosting the activity of electrode for phosphate adsorption. As an anode, CeO2/C-R@CNT delivered the maximum phosphate removal capacity of 109.5 mg P/g. The adsorption performance was investigated by analyzing adsorption kinetics and adsorption isotherms. The corresponding adsorption mechanism was studied by pH analysis, X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. The electrode showed high selectivity to phosphate adsorption, and the separation factor arrived at 8.7 in the mixture solution with the Cl–/P concen

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Author

Hengfeng Qian; Jianmao Yang; Bin Hu; Boshuang Zhang; Yiwen Wang; Jianyun Liu

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)