CdSe-Decorated Flowerlike CaMoO₄ Microspheres with Enhanced Hydrogen Production Activity

Abstract

Photocatalytic hydrogen production technology from water is a more effective and promising method to solve energy and environmental crises. In this work, flowerlike CaMoO 4 microspheres were successfully synthesized by an ultrasonic precipitation method and modified with variable concentrations of CdSe NCs. CdSe/CaMoO 4 microspheres showed increased light absorption ability, larger relative surface area, lower electrochemical impedance, and longer fluorescence lifetime. The photocatalytic hydrogen production rate of CdSe/CaMoO 4 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/CaMoO 4 with high hydrogen production activity would be an efficient photocatalyst for hydrogen production applications.

Ni(OH)2 Nanosheet as an Efficient Cocatalyst for Improved Photocatalytic Hydrogen Evolution over Cd0.9Zn0.1S Nanorods under Visible Light

“…Combustion of fossil fuels causes problems such as energy crisis and environmental pollution . Exploring clean and sustainable energy sources to replace fossil fuels remains one of the most important challenges of this century. − After years of hard work by scientists and researchers, photocatalytic H 2 production is considered to be an ideal strategy to overcome the aforementioned issues. − However, exploring photocatalysts with low cost, high activity, and photostability is still the focus of this field. In addition, during the photocatalytic reaction process, the photocatalyzed electrons and holes shift to the upper layer of the photocatalyst to undergo redox reactions, which seriously affects the performance of the catalyst. , Therefore, enhancing charge separation is key to improving photocatalytic performance .…”