Microwave hydrothermal synthesis of WO_(3)(H_(2)O)_(0.333)/CdS nanocomposites for efficient visible-light photocatalytic hydrogen evolution

WO_(3)(H_(2)O)_(0.333)/CdS(WS)nanocomposites are obtained via a rapid microwave hydrothermal method,and they are served as visible light-driven photocatalysts for the H2 generation.By using Pt as the cocatalyst,the WS nanocomposite with 70 wt.%CdS reaches the H2 evolution rate of 10.32 mmol$g-1$h-1,much quicker than those of WO_(3)(H_(2)O)_(0.333)and CdS.The cycling test reveals the good photocatalytic stability of the WS nanocomposite.The carrier transfer mechanism of WS nanocomposites can be explained by the Z-scheme mechanism.The existence of the Z-scheme heterojunction greatly helps to separate photogenerated carriers and thus improves the photocatalytic activity.The present work provides a rapid synthesis method for preparing Z-scheme heterojunction photocatalysts,and may be helpful for the green production of hydrogen.