Visible active mixed metal ferrite intercalated semiconductor photocatalyst Mn_0.6Zn_0.4Fe₂O₄/g-C₃N₄ was prepared via facile hydrothermal and liquid assembly method for methylene blue (MB) dye degradation. The prepared samples were well characterized in term of their functional groups, crystallinity, elemental analysis, surface morphology using Fourier transform infrared spectroscopy, x-ray diffraction spectroscopy, energy dispersive x-ray, and scanning electron microscopy, respectively. The optical response of catalysts was checked by estimating the energy band gap (E _g) of semiconductor photocatalysts using UV–vis spectroscopy. The photoluminescence spectroscopy was also performed to estimate the reduction in emission intensity after insertion of g-C₃N₄ into Mn_0.6Zn_0.4Fe₂O_4. The novel composition of Mn_0.6Zn_0.4Fe₂O₄ with g-C₃N_4, improved the optical response of pristine photocatalysts due to the reduction in the energy band gap and insertion of heterojunction. The surface area analysis of Mn_0.6Zn_0.4Fe₂O₄ and Mn_0.6Zn_0.4Fe₂O₄/g-C₃N₄ were acquired by Brunauer–Emmett–Teller. Point zero charge was also determined to observe the surface behavior of composite under different solution pH. Various parameters such as pH, catalyst dose, oxidant dose, irradiation time and initial dye concentration were optimized, and their effects were studied in photo-Fenton process. It was observed that 98% MB dye was degraded under optimized conditions (pH=8, composite dose=50 mg/100 ml, oxidant dose=7 mM, initial dye conc.=10 ppm, and irradiation time=120 min). The results showed that when the ferrites of mixed metals (Mn, Zn) were used with g-C₃N₄ their photocatalytic activity enhanced due to mutual effect of both mixed metals ferrite and g-C₃N₄, which is considerably higher than their individual effect already reported. Furthermore, the combined effect of independent variables was evaluated by response surface methodology.

可见活性混合金属铁氧体插层半导体光催化剂 Mn _0.6 Zn _0.4 Fe ₂ O ₄ /gC ₃ N ₄通过简便的水热和液体组装方法制备，用于亚甲蓝 (MB) 染料降解。分别使用傅里叶变换红外光谱、X 射线衍射光谱、能量色散 X 射线和扫描电子显微镜对制备的样品在官能团、结晶度、元素分析、表面形貌等方面进行了很好的表征。通过估计能带隙（E _g) 使用紫外-可见光谱分析半导体光催化剂。还进行了光致发光光谱以估计将 gC ₃ N ₄插入 Mn _0.6 Zn _0.4 Fe ₂ O ₄后发射强度的降低。Mn _0.6 Zn _0.4 Fe ₂ O ₄与 gC ₃ N ₄的新型组合物改善了由于能带隙的减小和异质结的插入，原始光催化剂的光学响应。Mn _0.6 Zn _0.4 Fe ₂ O ₄的表面积分析和 Mn _0.6 Zn _0.4 Fe ₂ O ₄ /gC ₃ N ₄由 Brunauer-Emmett-Teller 获得。还确定了零点电荷以观察复合材料在不同溶液 pH 值下的表面行为。优化了pH值、催化剂剂量、氧化剂剂量、辐照时间和初始染料浓度等各种参数，并研究了它们在光芬顿过程中的影响。观察到在优化条件下（pH=8，复合剂量=50mg/100ml，氧化剂剂量=7mM，初始染料浓度=10ppm，照射时间=120分钟），98%的MB染料被降解。结果表明，当混合金属（Mn、Zn）的铁氧体与 gC ₃ N ₄由于混合金属铁氧体和 gC ₃ N _{4 的}相互作用，它们的光催化活性增强，这大大高于已报道的单独效应。此外，通过响应面方法评估自变量的组合效应。