Enhanced BiVO4 photocatalyst anchored on construction waste bricks powder for efficient formaldehyde and methylene blue degradation

作者：Liguang Xiao, Yiming Wang, Junlin Yan, Zhenqiang Duan, He Han, Dawei Jiang · 发表于：Construction and Building Materials · 年份：2025 · DOI：10.1016/j.conbuildmat.2025.140536 · 被引用次数：10 · 研究领域：Advanced Photocatalysis Techniques、TiO2 Photocatalysis and Solar Cells、Catalytic Processes in Materials Science

With the increasing accumulation of construction waste and organic pollutants , efficient treatment methods are urgently needed. This study reports the hybridisation of construction waste bricks (CWB) with BiVO 4 (BVO) using a hydrothermal method to synthesise a novel photocatalytic material. Significant improvements in photocatalytic performance of the BVO/CWB-11 composite are seen to address charge carrier recombination in BVO. With a lower E g of 2.18 eV and an absorption edge extending to 577 nm, this composite can enhance visible light absorption and suppress electron hole recombination . The evidence for this includes reduced photoluminescence intensity showing the longer carrier lifetime and also the enhanced transient photocurrent response. Under simulated visible light, BVO/CWB-11 gives degradation efficiencies for methylene blue (MB) and formaldehyde (CH 2 O) of 95.66 and 77.85 %, respectively, which are 1.8 and 1.37 times that of pure BVO. The incorporation of CWB not only provides a low-cost recycling option for construction waste but also offers an alternative approach to the treatment of MB and CH 2 O removal. This work provides a stepping stone towards the application of BVO-based photocatalysts in environmental remediation.