Cobalt-grafted-mesoporous silica nanoparticles with the Si/Co molar ratio of 70 were synthesized by using sol–gel method (denoted as Co-MSN). Characterization of the Co-MSN was carried out by X-ray diffraction analysis (XRD), Fourier-transform infrared spectroscopy (FTIR), energy dispersive X-ray analysis (EDX), scanning electron microscopy (SEM), and N₂ adsorption/desorption analysis. Photocatalytic activity of the Co-MSN sample was studied for removal of neutral red as one of the most widely used dye pollutants, in presence of H₂O₂ and UV irradiation. In this regard, effect of various influencing parameters such as pH, Co content, dye concentration, amount of oxidant, and presence/absence of UV irradiation were investigated. It was found that incorporation of the Co²⁺ ions into the mesoporous silica nanostructure significantly improves the photocatalytic degradation of neutral red. Under the optimized conditions including 0.3 mmol of H₂O₂ (as an oxidant), catalyst dosage of 0.075 mg, initial dye concentration of 0.08 mM, and UV irradiation (32 W, 254 nm), up to 81% of neutral red was degraded at room temperature for 220 min.

通过使用溶胶-凝胶法（表示为 Co-MSN）合成了 Si/Co 摩尔比为 70 的钴接枝介孔二氧化硅纳米粒子。通过 X 射线衍射分析 (XRD)、傅里叶变换红外光谱 (FTIR)、能量色散 X 射线分析 (EDX)、扫描电子显微镜 (SEM) 和 N ₂吸附/解吸分析。研究了 Co-MSN 样品在 H ₂ O ₂存在下去除作为最广泛使用的染料污染物之一的中性红的光催化活性和紫外线照射。在这方面，研究了各种影响参数的影响，例如 pH 值、Co 含量、染料浓度、氧化剂的量以及是否存在紫外线照射。发现将Co ²⁺离子掺入介孔二氧化硅纳米结构显着改善了中性红的光催化降解。在0.3 mmol H ₂ O ₂ (作为氧化剂)、0.075 mg催化剂用量、0.08 mM初始染料浓度和UV照射(32 W, 254 nm)的优化条件下，高达81%的中性红被在室温下降解 220 分钟。