The BiOI/BiFeO₃/UiO-66(Zr/Ti)-MOF composite as a new ternary separable visible light photocatalyst was synthesized and well-characterized through the XRD, FE-SEM, FTIR, PL, VSM and DRS analyses. The BiOI/BiFeO₃/UiO-66 photocatalytic performance for urea photo-oxidation to N₂, H₂O and CO₂ were evaluated in a continuous flow-loop thin-film slurry flat-plate photoreactor (TFSR) equipped to blue light-emitting diodes (LEDs) illumination. Results show that the introduction of BiFeO₃ perovskite and BiOI on the UiO-66(Zr/Ti) surface improves the separation and migration rate of photo-induced charges and thereby boosting the photocatalytic efficiency. Additionally, the appropriate band alignment, photo-stability and electron-hole pairs separation improvement of BiOI/BiFeO₃/UiO-66(Zr/Ti)-MOF cause to enhance the urea decomposition. Moreover, five operational parameters including solution flow rate, pH, initial urea concentration, photocatalyst mass and light irradiation time were analyzed and optimized using the central composite design (CCD) and desirability function (DF), respectively. The maximum urea photocatalytic oxidation and elimination efficiency (88.53%) with the desirability value of 0.84 was achieved at the optimum conditions: 603 ml/min, 0.12 g/L, 7, 136 min and 60 ppm for flow rate, photocatalyst mass, pH, irradiation time and initial urea concentration, respectively.

通过XRD，FE-SEM，FTIR，PL，VSM和DRS分析，合成了BiOI / BiFeO ₃ / UiO-66（Zr / Ti）-MOF复合材料，作为新型三元可分离可见光催化剂。在配备有蓝光的连续流环式薄膜浆料平板光反应器（TFSR）中评估了BiOI / BiFeO ₃ / UiO-66对尿素光氧化为N ₂，H ₂ O和CO _2的光催化性能。发光二极管（LED）照明。结果表明BiFeO ₃的引入UiO-66（Zr / Ti）表面的钙钛矿和BiOI改善了光诱导电荷的分离和迁移速率，从而提高了光催化效率。此外，BiOI / BiFeO ₃的合适的能带排列，光稳定性和电子-空穴对分离改进/ UiO-66（Zr / Ti）-MOF导致尿素分解增强。此外，分别使用中央复合设计（CCD）和理想功能（DF）分别分析和优化了五个操作参数，包括溶液流速，pH，初始尿素浓度，光催化剂质量和光照射时间。在以下最佳条件下可实现最大尿素光催化氧化和消除效率（88.53％），理想值为0.84：流量，光催化剂质量，pH 603 ml / min，0.12 g / L，7、136 min和60 ppm。 ，照射时间和初始尿素浓度。