The enhanced performance of NaFe2PO4(SO4)2/C electrode materials in the desalination of brackish water by capacitive deionization

Publication Type

Journal Article

Name of Author

• Omari Sufiani, Department of Materials and Energy Sciences and Engineering, The Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
• Hideki Tanaka, Shinshu University, Matsumoto, Japan
• Katsuya Teshima, Shinshu University, Matsumoto, Japan
• Revocatus Lazaro Machunda, North-West University, Potchefstroom, South Africa
• Yusufu Abeid Chande Jande, Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania

Publication Date (Issue Year)

2024

Journal Name

Materials Letters

Abstract

In this study partial substitution of phosphates in Na3Fe2(PO4)3/C (NFP/C) by sulphates to prepare Na2Fe2(PO4)2SO4 (NFP2S/C) and NaFe2PO4(SO4)2/C (NFPS/C) was carried out by dissolution-evaporation method. The idea is to adjust the properties of NFP/C owing to the differences in the inductive effect and sizes of sulphates and phosphates which results the obtained NFPS/C to record excellent electrochemical and desalination performance. Several characterization techniques used to analyse the synthesized materials confirm the successful doping and structure integrity. Electrochemical study reveals NFPS/C to exhibit the highest capacitance of 127.4 F/g when scanned at 10 mV/s. The results show that when the potential of 1.2 V is applied to desalinate 500 mg/L salt solution the salt removal of about 17.3 mg/g is achieved by NFPS/C while NFP/C attaining 9.8 mg/g. The NFPS/C was then tested in the desalination of real Ocean water and promising results obtained. The salt removal performance presented makes the developed materials promising for application in brackish water desalination by capacitive deionization.

Keywords

NaFe2PO4(SO4)2/C electrode materials, desalination, brackish water, capacitive deionization

Grantee Name(s)

Yusufu Abeid Chande Jande

Project Title

Fluoride removal from drinking water using capacitive deionization

Type of Grant

Research Award

Thematic Area

Minerals, Mining and Materials Engineering

Funding Statement

The study was supported by The University of Dodoma, Water Infrastructure and Sustainable Energy Futures (WISE-Futures) African center of excellence, Arusha, Tanzania and the Program on Regional Innovation and Ecosystem Formation from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan.

Recommended Citation

Sufiani, O., Tanaka, H., Teshima, K., Machunda, R. L., & Jande, Y. C. (2024). The enhanced performance of NaFe2PO4(SO4)2/C electrode materials in the desalination of brackish water by capacitive deionization. Materials Letters https://doi.org/10.1016/j.matlet.2024.137496