Faculty of Petroleum Technology and Petrochemistry, Petroleum-Gas University of Ploiesti, 100680 Ploiesti, Romania.
Department of Pure and Industrial Chemistry, Bayero University, Kano PMB 3011, Nigeria.
Int J Mol Sci. 2024 May 1;25(9):4948. doi: 10.3390/ijms25094948.
This current study assessed the impacts of morphology adjustment of perovskite BiFeO (BFO) on the construction and photocatalytic activity of P-infused g-CN/U-BiFeO (U-BFO/PCN) heterostructured composite photocatalysts. Favorable formation of U-BFO/PCN composites was attained via urea-aided morphology-controlled hydrothermal synthesis of BFO followed by solvosonication-mediated fusion with already synthesized P-g-CN to form U-BFO/PCN composites. The prepared bare and composite photocatalysts' morphological, textural, structural, optical, and photocatalytic performance were meticulously examined through various analytical characterization techniques and photodegradation of aqueous rhodamine B (RhB). Ellipsoids and flakes morphological structures were obtained for U-BFO and BFO, and their effects on the successful fabrication of the heterojunctions were also established. The U-BFO/PCN composite exhibits 99.2% efficiency within 20 min of visible-light irradiation, surpassing BFO/PCN (88.5%), PCN (66.8%), and U-BFO (26.1%). The pseudo-first-order kinetics of U-BFO/PCN composites is 2.41 × 10 min, equivalent to 2.2 times, 57 times, and 4.3 times of BFO/PCN (1.08 × 10 min), U-BFO, (4.20 × 10 min), and PCN, (5.60 × 10 min), respectively. The recyclability test demonstrates an outstanding photostability for U-BFO/PCN after four cyclic runs. This improved photocatalytic activity exhibited by the composites can be attributed to enhanced visible-light utilization and additional accessible active sites due to surface and electronic band modification of CN via P-doping and effective charge separation achieved via successful composites formation.
本研究评估了钙钛矿 BiFeO（BFO）形态调整对 P 注入 g-CN/U-BiFeO（U-BFO/PCN）异质结构复合光催化剂构建和光催化活性的影响。通过尿素辅助的 BFO 形态控制水热合成，然后通过已经合成的 P-g-CN 的溶剂超声融合，成功制备了 U-BFO/PCN 复合材料。通过各种分析表征技术和水溶液罗丹明 B（RhB）的光降解，仔细研究了制备的裸催化剂和复合光催化剂的形态、结构、光学和光催化性能。U-BFO 和 BFO 分别呈现出椭圆形和片状形态结构，并且确定了它们对异质结成功制备的影响。在可见光照射 20 分钟内，U-BFO/PCN 复合材料的效率达到 99.2%，超过了 BFO/PCN（88.5%）、PCN（66.8%）和 U-BFO（26.1%）。U-BFO/PCN 复合材料的准一级动力学常数为 2.41×10-2 min-1，分别是 BFO/PCN（1.08×10-2 min-1）、U-BFO（4.20×10-2 min-1）和 PCN（5.60×10-2 min-1）的 2.2 倍、57 倍和 4.3 倍。循环实验表明，U-BFO/PCN 在经过四次循环后仍具有出色的光稳定性。复合材料表现出的这种提高的光催化活性可归因于 P 掺杂对 CN 的表面和电子能带改性，从而增强了可见光的利用和额外的可及活性位点，以及成功形成复合材料实现的有效电荷分离。
