CdSe-Decorated Flowerlike CaMoO₄ Microspheres with Enhanced Hydrogen Production Activity

Photocatalytic hydrogen production technology from water is a more effective and promising method to solve energy and environmental crises. In this work, flowerlike CaMoO₄ microspheres were successfully synthesized by an ultrasonic precipitation method and modified with variable concentrations of CdSe NCs. CdSe/CaMoO₄ microspheres showed increased light absorption ability, larger relative surface area, lower electrochemical impedance, and longer fluorescence lifetime. The photocatalytic hydrogen production rate of CdSe/CaMoO₄ microspheres could reach up to 10 162.33 μmol g^-1 h^-1. The constructed type-I heterostructure improved the separation of photogenerated electrons and inhibited the rapid recombination of photogenerated electrons and holes, thus enhancing the photocatalytic hydrogen production performance. CdSe/CaMoO₄ with high hydrogen production activity would be an efficient photocatalyst for hydrogen production applications.