介孔硫改性氧化铁的制备及其对染料废水降解的研究

Preparation of Mesoporous Sulfur Modified Iron Oxide and Research for Dyestuff Wastewater Degradation

目前染料废水作为我国染料工业企业排放污水中一种重要水体,通常能降低水体的透明度,并且生物毒性较大,伴随着严重的“三致”作用。本研究利用共沉淀法制备一种新型介孔氧化铁催化剂,实现了其对人工模拟染料废水–亚甲基蓝的高效降解。利用XRD、SEM及TEM等仪器对该材料的结构及外貌形态进行了表征,结果表明该材料成功的实现了硫改性。在催化剂与过氧化氢的最佳比例实验中发现在0.06 g的催化剂和0.6 mL的过氧化氢的作用下,能在10 min时将浓度为80 mg/L的亚甲基蓝99%降解。上述实验表明,合成的介孔硫改性氧化铁可以很好的催化过氧化氢生成羟基自由基,进而有效的降解染料分子,是一种很有前景的催化剂材料。

As one of the important industrial enterprises discharge water, dyestuff wastewater can usually lower the capacity of the water and owns high biological toxicity with serious mutagenesis, car-cinogenesis and teratogenesis effect. In this research, a new type of mesoporous iron oxide catalyst was prepared by coprecipitation, and used to degrade of methylene blue which achieved efficient effect. The structure and appearance of the material were characterized by means of XRD, SEM and TEM, and the results showed that the material was modified by sulfur successfully. In the best proportion of catalyst and hydrogen peroxide experiments, it was found that under 0.06 g catalyst and 0.6 mL hydrogen peroxide condition, 80 mg/L methylene blue solution can be 99% degraded. The experimental results showed that the synthesis of mesoporous sulfur modified iron oxide could be as a promising catalyst material to catalyze hydrogen peroxide efficiently to generate hydroxyl free radicals for the degradation of dye molecules.