This study presents the preparation of SiO₂/g-C₃N₅@NiFe₂O₄ nanophotocatalyst for the removal of betamethasone from aqueous solutions. The SiO₂/g-C₃N₅@NiFe₂O₄ nanophotocatalyst was synthesized using the solvothermal method, and its structure and optical properties were characterized and confirmed through XRD, FESEM, EDX, DRS, BET, VSM and PL analysis. Photocatalytic removal of betamethasone was optimized using a central composite design. The band gap of pure g-C₃N₅, NiFe₂O₄, and SiO₂/g-C₃N₅@NiFe₂O₄ was obtained 2.4 eV, 2.7 eV, and 1.4 eV, respectively using the Tauc plot. The F-value of 909.88 and Lack of Fit F-value of 0.41 confirm the obtained model is significant. Also, the value of R² = 0.9988 along with R²adja = 09977 demonstrates excellent model performance. Maximum removal efficiency of betamethasone was approximately 87.15% under the following optimal conditions: nanophotocatalyst dosage of 0.005 g/50 mL, a betamethasone concentration of 20 mg/L, and an irradiation time of 40 min under visible light. This performance closely aligns with the actual value of 80.65%. In conclusion, the SiO₂/g-C₃N₅@NiFe₂O₄ nanophotocatalyst demonstrates excellent photocatalytic ability for the removal of betamethasone from aqueous solutions.

本研究介绍了用于去除水溶液中倍他米松的SiO ₂ /gC ₃ N ₅ @NiFe ₂ O ₄纳米光催化剂的制备。采用溶剂热法合成了SiO ₂ /gC ₃ N ₅ @NiFe ₂ O _{4纳米光催化剂，并通过XRD、FESEM、EDX、DRS、BET、VSM和PL分析对其结构和光学性能进行了表征和证实。}使用中心复合设计优化了倍他米松的光催化去除。_{使用Tauc图获得纯gC 3} N ₅、NiFe ₂ O ₄和SiO ₂ /gC ₃ N ₅ @NiFe ₂ O ₄的带隙分别为2.4 eV、2.7 eV和1.4 eV。F值 909.88 和失拟F值 0.41 证实所获得的模型是显着的。此外， R ²  = 0.9988 和R ² adja = 09977的值展示了出色的模型性能。在最佳条件下，倍他米松的最大去除效率约为87.15%：纳米光催化剂用量为0.005 g/50 mL，倍他米松浓度为20 mg/L，可见光照射时间为40 min。该性能与实际值 80.65% 非常吻合。总之，SiO ₂ /gC ₃ N ₅ @NiFe ₂ O ₄纳米光催化剂对于从水溶液中去除倍他米松表现出优异的光催化能力。