Masri Mohamed, K B Girisha, Hezam Abdo, Alkanad Khaled, Qahtan Talal F, Drmosh Qasem A, Prashantha Kalappa, S H Manjunath, Abdu Kaid Sanaa Mohammed, Byrappa K, Masri Faten
Center for Research and Innovations, BGS Institute of Technology, Adichunchanagiri University B. G. Nagar Karnataka India.
Department of Mechanical Engineering, BGS Institute of Technology, Adichunchanagiri University B. G. Nagar Karnataka India.
Nanoscale Adv. 2025 Jan 29;7(4):1030-1047. doi: 10.1039/d4na01047g. eCollection 2025 Feb 11.
Adverse reactions caused by waterborne contaminants constitute a major hazard to the environment. Controlling the pollutants released into aquatic systems through water degradation has been one of the major concerns of recent research. Bismuth-based perovskites have exhibited outstanding properties in the field of photocatalysis. Nonetheless, many proposed bismuth-based perovskites still suffer from stability problems. The present study investigated a unique bismuth-based metal-co-sharing composite of 2D BiO/CsBiBr nanosheet perovskite synthesized a modified anti-solvent reprecipitation method. Several samples were prepared using different ratios of BiO and CsBiBr. The optimal composite sample was found to be BO/CBB 28%, where 2D stacked nanosheets of CsBiBr showed remarkable interaction with BiO due to its optimal Bi co-sharing, as displayed in the FE-SEM and HRTEM images. However, further increasing the percentage led to greater agglomeration, hindering the photocatalytic degradation efficiency. The average size and optical band gap energy of the optimal sample were 42.5 nm and 2.46 eV, respectively. The photocatalytic degradation of MB using the optimal sample reached ∼92% within 60 min with a catalyst dosage of 10 mg L. With an increase in catalyst concentration to 40 mg L, MB removal reached almost ∼96% within 60 min under visible light owing to the enhanced stability, facilitating efficient charge separation. This paper presents an improved composite with optimal ratios of 2D BiO/CsBiBr nanosheets that demonstrated good stability and enhanced photocatalytic performance in comparison with pure BiO and CsBiBr. This study also sheds light on the significance of metal co-sharing and the pivotal role it plays in enhancing the S-scheme charge transfer and the internal electric field between the two components.
水传播污染物引起的不良反应对环境构成重大危害。通过水降解控制释放到水生系统中的污染物一直是近期研究的主要关注点之一。铋基钙钛矿在光催化领域表现出优异的性能。尽管如此，许多提出的铋基钙钛矿仍然存在稳定性问题。本研究采用改进的反溶剂再沉淀法研究了一种独特的二维BiO/CsBiBr纳米片钙钛矿铋基金属共担载复合材料。使用不同比例的BiO和CsBiBr制备了几个样品。发现最佳复合样品为BO/CBB 28%，其中CsBiBr的二维堆叠纳米片由于其最佳的Bi共担载与BiO表现出显著的相互作用，如FE-SEM和HRTEM图像所示。然而，进一步增加百分比会导致更大的团聚，阻碍光催化降解效率。最佳样品的平均尺寸和光学带隙能量分别为42.5 nm和2.46 eV。使用最佳样品在催化剂用量为10 mg/L的情况下，60分钟内MB的光催化降解率达到约92%。随着催化剂浓度增加到40 mg/L，由于稳定性增强，在可见光下60分钟内MB去除率几乎达到约96%，促进了有效的电荷分离。本文提出了一种具有最佳比例的二维BiO/CsBiBr纳米片的改进复合材料，与纯BiO和CsBiBr相比，其表现出良好的稳定性和增强的光催化性能。本研究还揭示了金属共担载的重要性及其在增强S型电荷转移和两组分之间的内电场中所起的关键作用。
