Novel WO3/Sb2S3 Heterojunction Photocatalyst Based on WO3 of Different Morphologies for Enhanced Efficiency in Photoelectrochemical Water Splitting

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• 作者：Jing Zhang ; Zhihua Liu ; Zhifeng Liu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：April 20, 2016
• 年：2016
• 卷：8
• 期：15
• 页码：9684-9691
• 全文大小：498K
• 年卷期：0
• ISSN：1944-8252

文摘

We report the fabrication of tungsten trioxide (WO₃) with different morphologies applied in photoelectrochemical (PEC) water splitting. The antimony sulfide (Sb₂S₃) was incorporated onto WO₃ for the first time with the aim of improving its photoelectrocatalytic activity under visible-light illumination. In the present work, WO₃ of different morphologies were fabricated on FTO glass via adjusting the pH value via a facile hydrothermal method and the morphological effect on the photoelectrocatalytic activity of the obtained samples has been discussed. WO₃/Sb₂S₃ heterojunction photoelectrocatalysts were subsequently synthesized successfully to further improve the photoelectrocatalytic activity. Among them, WO₃/Sb₂S₃ heterojunction photoelectrocatalyst based on WO₃ micro crystals achieved an enhanced photocurrent of 1.79 mA/cm² at 0.8 V versus RHE under simulated sunlight, compared to 0.45 mA/cm² of pristine WO₃ micro crystals. This excellent PEC performance benefits from the enhanced light absorbance, construction of suitable energy band gap, the improved photogenerated electron–hole pairs separation and transfer efficiency, which potentially provides new insights into PEC water splitting systems.