School of Materials Science and Engineering, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, PR China.
School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, PR China; State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430073, PR China.
Colloids Surf B Biointerfaces. 2022 Jun;214:112443. doi: 10.1016/j.colsurfb.2022.112443. Epub 2022 Mar 5.
In this study, a low-cost and high-performance MoS/sodium alginate (SA)/Fe (MSF) hydrogel catalyst was prepared. It was found that the MSF hydrogel could efficiently catalyze the degradation of methylene blue (MB) through the Fenton reaction without the addition of Fe. The reaction was initiated by Fe which was derived from the cyclic redox reaction between MoS and Fe and produced large quantities of ·OH to degrade the MB. The effect of MoS concentration, FeCl·6HO concentration, HO dosage, solution pH, and light on the degradation was systematically studied. The MoS concentration of 0.5 mg/ mL, FeCl·6HO concentration of 0.25 g/mL, 50 μL HO, and the pH of 4.0 were the optimized parameters. Moreover, it was found that the MB degraded faster under the infrared radiation. The MB removal rate reached as high as 98% within 15 min in the presence of a low concentration of HO and the procedure could be repeated 5 times. The MSF hydrogel provided an effective and simple strategy for the sustainable degradation of organic pollutants in wastewater.
在这项研究中，制备了一种低成本、高性能的 MoS/海藻酸钠（SA）/Fe（MSF）水凝胶催化剂。研究发现，MSF 水凝胶无需添加 Fe 即可通过芬顿反应有效地催化亚甲基蓝（MB）的降解。反应由 MoS 和 Fe 之间的循环氧化还原反应产生的 Fe 引发，产生大量·OH 来降解 MB。系统研究了 MoS 浓度、FeCl·6HO 浓度、HO 用量、溶液 pH 值和光对降解的影响。MoS 浓度为 0.5mg/mL，FeCl·6HO 浓度为 0.25g/mL，50μL HO，pH 值为 4.0 为最佳参数。此外，还发现 MB 在红外辐射下降解速度更快。在低浓度 HO 的存在下，MB 的去除率在 15 分钟内高达 98%，并且该过程可以重复 5 次。MSF 水凝胶为废水有机污染物的可持续降解提供了一种有效而简单的策略。
