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Stable and efficient self-sustained photoelectrochemical desalination based on CdS QDs/BiVO4 heterostructure
Liang, Mengjun1; Zhang, Jiancong1; Ramalingam, Karthick1,2; Wei, Qiang1; San Hui, Kwan3; Htike Aung, Su4; Hui, K.N.5; Chen, Fuming1,2
2022-02-01
Source PublicationChemical Engineering Journal
ISSN1385-8947
Volume429
Abstract

Herein, we propose a stable and efficient photo-driven electrochemical desalination technique without any external bias. The whole desalination process is driven by CdS quantum dots (QDs) sensitized BiVO photoanode, where I/I redox couples are recirculated as the electrolyte. Two salt streams are sandwiched between the photoanode and cathode. The salt ions in desalted stream are continuously extracted by the redox reaction of I/I electrolyte at their respective electrode chambers. The initial photocurrent of 2.58 mA/cm can be obtained in the present photoanode-assisted desalination device, which is much greater than the previous reported results. Besides, the electrical current of the photo-electricity conversion system is extremely stable in the current system. Within the four batch cycles, the variation of salt removal rate is as low as 2.3 μg/(cm•min) without significant decay. The photoanode-electrolyte interface, charge separation and transportation are further investigated by photoluminescence, electrochemical impedance spectroscopy and Mott-Schottky analysis. The promising desalination performance can be attributed to the synergistic effect of CdS QDs and BiVO heterojunction which is applied in the field of solar-driven desalination for the first time. This work is significant for the design of high light-absorbing heterojunction photocatalysts for the dual functions of energy production and water desalination.

KeywordCds Qds/bivo4 Energy Consumption Photo-electrochemical Desalination Photoanode
DOI10.1016/j.cej.2021.132168
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS IDWOS:000724546100003
Scopus ID2-s2.0-85114687146
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Cited Times [WOS]:8   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorChen, Fuming
Affiliation1.Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, Guangdong Engineering Technology Research Center of Efficient Green Energy and Environment Protection Materials, School of Physics and Telecommunication Engineering, South Ch
2.School of Electronics and Information Engineering, South China Normal University, Foshan, 528225, China
3.Engineering, Faculty of Science, University of East Anglia, Norwich, United Kingdom
4.Department of Physics, Materials Research Laboratory, University of Mandalay, Mandalay, 05032, Myanmar
5.Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau, China
Recommended Citation
GB/T 7714
Liang, Mengjun,Zhang, Jiancong,Ramalingam, Karthick,et al. Stable and efficient self-sustained photoelectrochemical desalination based on CdS QDs/BiVO4 heterostructure[J]. Chemical Engineering Journal,2022,429.
APA Liang, Mengjun,Zhang, Jiancong,Ramalingam, Karthick,Wei, Qiang,San Hui, Kwan,Htike Aung, Su,Hui, K.N.,&Chen, Fuming.(2022).Stable and efficient self-sustained photoelectrochemical desalination based on CdS QDs/BiVO4 heterostructure.Chemical Engineering Journal,429.
MLA Liang, Mengjun,et al."Stable and efficient self-sustained photoelectrochemical desalination based on CdS QDs/BiVO4 heterostructure".Chemical Engineering Journal 429(2022).
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