Construction of LZU1@WO3 heterojunction photocatalysts: enhanced photocatalytic performance and mechanism insight. (26th August 2021)

• Record Type: Journal Article
• Authors: Shang, Simin; Yang, Huaizhi; Shi, Dajun; Dong, Bowen; Zhang, Heling; Cheng, Qingrong; Pan, Zhiquan
• Is Part Of: New journal of chemistry. Volume 45:Number 36(2021)
• Page Start: 17025
• Page End: 17036
• Publication Date: 2021-08-26
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d1nj03073f
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Our well-designed nano-WO3 @LZU1 composite photocatalysts were fully characterized. Under simulated sunlight, the hybrid materials showed much higher photocatalytic activity for BBR degradation and MB degradation than WO3 or LZU1, and improved hydrogen production capacity. Abstract : Due to the unique structure and performance of COFs, a new well-designed nano-LZU1@WO3 composite photocatalyst was successfully synthesized through a simple hydrothermal method. The nano-LZU1@WO3 composite material shows higher photocatalytic activity than pure WO3 and LZU1 in the degradation of BBR. The best LZU10.44 @WO3 showed the highest catalytic activity, removing 97.7% of BBR within 90 minutes and 97.4% MB in 110 minutes. The improved photocatalytic activity of the composite material is mainly attributed to the effective photo-generated charge separation and Z-type heterojunction transfer through the coupling between WO3 and LZU1. The composite photocatalyst showed obvious good stability and recyclability after 4 cycles. Finally, based on the active radical capture experiment and ESR, a possible Z-scheme electron transfer mechanism is proposed, which can explain the improved photocatalytic performance of the photocatalytic system. Moreover, the best hydrogen evolution for LZU10.5 @WO3 reached 6133.2 μmol h −1 g −1, which is 386 times and 1.6 times that of pure WO3 and pure LZU1, respectively. We hope this work will provide a timely reference for the advancement of COF-based heterojunctions towards environmental pollutants and useful insights for future energy technologies beyond water electrolysis.