Utilization of Smart Hydrogel–Metal Composites as Catalysis Media

Ionic liquid hydrogel templates: Bulkgel, cryogel, and microgel to be used for metal nanoparticle preparation and catalysis

“…The activation values obtained here are similar to values determined from the literature [28,36,37]. Catalytic performances of the synthesized p(APTMACl)-based IL bulk gel, cryogel, and microgel were also investigated in the reduction of different nitro compounds to their corresponding amine compounds, such as 4-NA and 4-NBA.…”

“…Compsite T (°C) k app (min À1 ) R 2 Total turnover frequency mol 4-NP (mol catalyst min) À1 values are comparable with p(VI)-M (M:Co, Ni, Cu) hydrogels [37], and silver nanoshell-coated cationic polystyrene beads utilized as solid phase catalyst for the reduction reaction of 4-NP [38]. The versatility of p(APTMACl)-based hydrogels in terms of size and morphology offer great advantages to reported systems.…”

Catalytic Reduction of p-Nitrophenol Using Chitosan Stabilized Copper Nanoparticles

“…Table 2 shows a comparison of the k values obtained in this work with other polymer/Cu catalyst systems. As can M. pudica leave extracts N/A 8.0 5.5 9 10 -3 110.0 [17] p(APTMACl) N/A N/A 6.8 9 10 -3 2.4 [18] a k values for catalytic reaction at room temperature b K values cannot be calculated due to the lack of information be seen, the k values in this study (*10 -3 s -1 ) are comparable to most of the previous reported values. To better compare the performance of these catalysts, the activity factor (K) is calculated by dividing k with the weight of the catalyst applied in the respective reactions [41,42].…”

“…Copper is a good replacement in terms of cost and material abundancy. In fact, naked and stabilized-Cu nanoparticles have been employed in the catalytic reduction of p-NP recently [9][10][11][12][14][15][16][17][18][19]. Our group has also successfully demonstrated the viability of the Cu deposited porous silicon particles towards catalyzing the reduction of p-NP in the presence of potassium borohydride [20].…”

Synthesis and characterization of hydrogels from 1-vinylimidazole. Highly resistant co-polymers with synergistic effect

“…The aim of this paper thus focused on the analysis of the changes on properties based on the different possible interactions with VI, which could maximize structural freedom in highly steric environments [54]. Now, in general, of all possible applications, the use of hydrogels as complexing metal ions is highlighted since, once the polymermetal complex ion is obtained, these can be used as supports for the immobilization of biomolecules, such as enzymes [55]. In turn, the study of ligands and polymers with supported metal complex derivatives is relevant in the field of catalytic and bio-organic chemistry [25].…”