Abstract
The development of a solid substrate for the support and stabilization of zero-valent metal nanoparticles (NPs) is the heart of the catalyst system. In the current embodiment, we have prepared solid support comprise of alginate-coated cellulose filter paper (Alg/FP) for the synthesis and stabilization of Co nanoparticles (NPs) named as Alg/FP@Co NPs. Furthermore, Alginate polymer was blended with 1 and 2 weight percent of CoNi NPs to make Alg-CoNi1/FP and Alg-CoNi2/FP, respectively. All these stabilizing matrixes were used as dip-catalyst for the degradation of azo dyes and reduction of 4-nitrophenol (4NP). The effect of initial dye concentration, amount of NaBH4, and catalyst dosage was assessed for the degradation of Congo red (CR) dye by using Alg-CoNi2/FP@Co NPs. Results indicated that the highest kapp value (3.63 × 10−1 min−1) was exhibited by Alg-CoNi2/FP@Co NPs and lowest by Alg/FP@Co NPs against the discoloration of CR dye. Furthermore, it was concluded that Alg-CoNi2/FP@Co NPs exhibited strong catalyst activity against CR, and methyl orange dye (MO) degradation as well as 4NP reduction. Antibacterial activity of the prepared composites was also investigated and the highest l activity was shown by Alg-CoNi2/FP@Co NPs, which inhibit 2.5 cm zone of bacteria compared to other catalysts.
Highlights
Nanoscience received much interest in recent years due to their vast applications in sensing, drug delivery, antimicrobial activity, coating, bio-imaging, environmental remediation, and biomedical applications [1–6]
The FESEM images of alginate-coated cellulose filter paper (Alg/filter paper (FP)) indicated the presence of alginate polymer on the surface of cellulose microfibers
The Alg-CoNi1/FP@Co NPs showed a similar display of the alginate polymer covering the cellulose microfiber, where the CoNi are protruded from the alginate layer
Summary
Nanoscience received much interest in recent years due to their vast applications in sensing, drug delivery, antimicrobial activity, coating, bio-imaging, environmental remediation, and biomedical applications [1–6]. Organic solid support is the most frequently used solid support for this purpose due to its inert nature to the reaction and ease of derivatization by introducing new functionality to the host material Among all these supporting materials, polymer-supported substrate for nanoparticles stabilization is one of the most important systems. The alginate polymer swells and demonstrated a strong gelling characteristics to make hydrogels Both cellulose microfibers and alginate polymer provide a good platform for the stabilization of NPs. the use of alginate biopolymer to coat the surface of cellulose paper has markedly enhanced the active functionalities that further stabilize the metal nanoparticles. We have prepared alginate-based cellulose filter paper (FP) as solid support for t zero-valent Co NPs and used it in the degradation of CR and MO dyes as well as 4NP in the presence of borohydride in an aqueous medium
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