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A simple and facile synthetic methodology for fabricating the regenerated silk fibroin(RSF)-based hydrogel which consisted of the in situ generated magnetic ferriferous oxide(Fe_3O_4) was developed. Using the co-precipitation of Fe~(2+) and Fe~(3+) within the RSF-based hydrogel with 90% RSF and 10% HPMC(hydroxypropyl methyl cellulose), the as-prepared RSF/Fe_3O_4 hydrogel not only showed high strength of saturation magnetization, but also exhibited excellent catalytic activities. For example, with the assistant of 3,3′,5,5′-tetramethylbenzidine(TMB), the RSF/Fe_3O_4 hydrogel could detect H_2O_2 at a concentration as low as 1 × 10~(-6) mol·L~(-1). In addition, the catalytic activities were able to be maintained for a long term under various conditions. These findings suggest that the RSF-based materials can be endowed with interesting properties, and have great potential for the applications in the fields of biotechnology and environmental chemistry.
A simple and facile synthetic methodology for fabricating the regenerated silk fibroin (RSF) -based hydrogel which consisted of the in situ generated magnetic ferriferous oxide (Fe_3O_4) was developed. Using the co-precipitation of Fe ~ (2+) and Fe ~ ( 3+) within the RSF-based hydrogel with 90% RSF and 10% HPMC (hydroxypropyl methyl cellulose), the as-prepared RSF / Fe_3O_4 hydrogel not only showed high strength of saturation magnetization, but also exhibited excellent catalytic activities. For example, with the assistant of 3,3 ’, 5,5’-tetramethylbenzidine (TMB), the RSF / Fe_3O_4 hydrogel could detect H_2O_2 at a concentration as low as 1 × 10 ~ (-6) mol·L -1. In addition, the catalytic activities were able to be maintained for a long term under various conditions. These findings suggest that the RSF-based materials can be endowed with interesting properties, and have great potential for the applications in the fields of biotechnology and environmental chemistry. .