Novel green nanocomposite from mesoporous MCM-41 and Co3O4 was synthesized from rice husk based silica gel and using the green extract of Peach leaves as reducing reagent. The composite was labeled as RH-MCM-41/Co3O4 and characterized by different techniques as green photocatalyst in the degradation of Acephate pesticide under visible light illumination. The composite showed well developed spherical MCM-41 particles decorated by nano Co3O4 nanoparticles with stunning surface area and low bandgap energy (1.51 eV). The composite displayed superior photocatalytic activities in the oxidation of Acephate which reflected in a complete degradation of different concentrations of it after 40 min (50 mg/L), 60 min (100 mg/L), 100 min (150 mg/L) and 140 min (200 mg/L) using 0.25 g of the composite. The complete removal of the present TOC for treatment of 100 mg/L acephate was achieved using 0.25 g after 70 min reflecting the formation of intermediate compounds during the oxidation steps. The reported intermediate compounds are CH3C(O)NH2, CH3O(CH3S)P(O)NH2, (CH3O)2P(O)SCH3, CH3OP(O)(OH)2, CH3SS(O)2CH3, and (COOH)2. All the formed intermediate compounds were degraded under the visible light photocatalytic activity of RH-MCM-41/Co3O4 into NO3-, SO42-, PO43-, and CO2 as final products.

中文翻译：

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稻壳硅胶和桃叶合成的MCM-41 / Co3O4纳米复合材料对乙酰甲酸盐农药的光催化降解作用增强。

以稻壳为基的硅胶，以桃叶绿色提取物为还原剂，合成了介孔MCM-41和Co3O4的新型绿色纳米复合材料。该复合物被标记为RH-MCM-41 / Co3O4，并通过不同技术表征为绿色光催化剂，在可见光照射下降解了乙酸农药。该复合材料显示出发达的球形MCM-41颗粒，该颗粒由纳米Co3O4纳米颗粒修饰，具有惊人的表面积和低带隙能（1.51 eV）。该复合材料在对乙酰乙酸盐的氧化中显示出优异的光催化活性，这反映了在40分钟（50 mg / L），60分钟（100 mg / L），100分钟（150 mg / L）和140分钟（200 mg / L），使用0.25 g的复合材料。在70分钟后使用0.25 g，可以完全除去用于处理100 mg / L乙酰甲酸盐的本TOC，反映出在氧化步骤中中间体化合物的形成。报告的中间体化合物为CH3C（O）NH2，CH3O（CH3S）P（O）NH2，（CH3O）2P（O）SCH3，CH3OP（O）（OH）2，CH3SS（O）2CH3和（COOH）2 。在RH-MCM-41 / Co3O4的可见光催化作用下，所有形成的中间化合物均被降解为最终产物NO3-，SO42-，PO43-和CO2。