The CdS/CaTiO3 cubic core-shell composite towards enhanced photocatalytic hydrogen evolution and photodegradation

The CdS/CaTiO3 cubic core-shell composite is synthesized via a hydrothermal-chemical method. The CdS/CaTiO3 cubic core-shell composite (CdS/CTO-2) exhibits remarkable photocatalytic HER activity (∼1025.27 μmol·g−1 h−1) and photodegradation enhancement than that of single CaTiO3 (∼21 folds of HER, ∼19 folds of photodegradation) and single CdS (∼15 folds of HER, ∼15 folds of photodegradation), and a decent stability. There, CdS/CaTiO3 composite with appropriate potential gradient and CdS with better visible light response can improve carrier efficiency, including increasing carrier transportation, prolonging lifetime and decreasing recombination. Additionally, cubic core-shell microstructure can increase active sites, while maintaining photocatalytic stability.