Abstract
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 concentration ratio of 15. In addition, CeO2/C-R@CNT retains the P adsorption capacity of 95 % in 30 cycles. The phosphate in actual water was totally removed with good repeatability, proving the high practicability for water treatment.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
