A new strategy for insulators to improve the ability of semiconductors to reduce Cr (VI)

Abstract Insulators have always been a kind of material that has not been valued in the field of catalysis. In order to expand its application in the field of photocatalytic treatment of heavy metal ions, a series of CdS/SrCO3 catalysts are prepared. XRD proves the successful synthesis of the composite catalyst, and TEM reveals the tight connection between CdS and SrCO3. Transient photocurrent and electrochemical impedance spectroscopy show that the composite catalyst has a better electron-hole pair separation effect and electron transport rate than the two single-phase materials. The catalyst has excellent photocatalytic properties and good stability. Finally, the reaction kinetics in the process of photocatalytic reduction of composite catalyst is discussed.