Stable and efficient self-sustained photoelectrochemical desalination based on CdS QDs/BiVO4 heterostructure

• The application of CdS QDs/BiVO 4 photoanode for promising solar-driven desalination. Stable & efficient desalination process is obtained with zero energy consumption. ion removal and conversion are simultaneously achieved. Intersectional research photocatalysis/photoelectrocatalysis solar Herein, we propose a stable photo-driven electrochemical technique without any external bias. whole driven by quantum dots (QDs) sensitized BiVO photoanode, where I - /I 3 redox couples recirculated as the electrolyte. Two salt streams sandwiched between cathode. ions in desalted stream continuously extracted reaction electrolyte at their respective electrode chambers. initial photocurrent 2.58 mA/cm 2 can be present photoanode-assisted device, which much greater than previous reported results. Besides, electrical current photo-electricity system extremely system. Within four batch cycles, variation rate low 2.3 ?g/(cm •min) significant decay. photoanode-electrolyte interface, charge separation transportation further investigated photoluminescence, impedance spectroscopy Mott-Schottky analysis. performance attributed to synergistic effect QDs heterojunction applied field first time. This work design high light-absorbing photocatalysts dual functions production water