Utilization of Environmentally Benign Hydrogels and Their Networks as Reactor Media in the Catalytic Reduction of Nitrophenols

Abstract

Iron particles were synthesized inside poly(2-acrylamido-2-methyl-1-propansulfonic acid) (p(AMPS)) and used as a catalyst in the reduction of nitro benzene and 4-nitrophenol to aniline and 4-aminophenol, respectively, in acidic medium. It was demonstrated that hydrogel networks can be used effectively as catalysis media in the reduction of some organic toxic materials. The results verified that iron particles containing p(AMPS) hydrogel networks yield faster conversion rates. Additionally, iron nanoparticles containing p(AMPS) hydrogel networks could catalyze the reaction, giving 32% yield without any added cocatalyst, providing self cocatalyst mission.

Biochar-Embedded Soft Hydrogel and Their Use in Ag Nanoparticle Preparation and Reduction of 4-Nitro Phenol

“…Due to these functional groups, hydrogels can respond to environmental factors such as pH, ionic strength, temperature, and electric and magnetic fields, and can even recognize certain molecules. Additionally, hydrogels are biocompatible and have been used in many fields such as drug release system controls, as sensors in biomedical applications, in separation and purification processes, in tissue engineering, and as support materials for catalysts [12][13][14][15][16][17][18].…”

Application of Co/Ti film catalysts with different nanostructures in the reduction of p-nitrophenol to p-aminophenol

“…[12][13][14] As for the catalysts, many noble metal catalysts in nanoscale, such as Au, 8,15 Pd, 6 Pt 7 and Ag, 16,17 are reported to show high catalytic activity in the transformation of PNP to PAP. Besides, there are also some cost-effective catalysts, including Ni, [18][19][20][21][22] Fe, 23 Cu, 24 CuO/γ-Al 2 O 3 , 25 NiCo 2 O 4 26 and Co 0.85 Se-Fe 3 O 4 composites, 27 which can effectively catalyze the reduction of PNP to PAP. Metallic Co, especially in nanoscale, has been demonstrated to exhibit good catalytic activity in a wide variety of reactions.…”

An enzyme-like imprinted-polymer reactor with segregated quantum confinements for a tandem catalyst

“…These bands were composite due to the multi-component composition of the reactor, spectroscopically corresponding to the stretching of O-H/N-H, C]O, S]O, and C-N/C-C bonds. 25,26 For addressing these absorption bands, the FTIR spectra of the three control reactors (i.e., MIP-Au-BNPC, MIP-Au-NP, and NIP-Au) and two templates (i.e., BNPC and NP), along with the MIP-Au-NP-BNPC precursor (in which the imprinted BNPC and NP moieties had not been removed from the polymeric matrix of MIP-Au-NP-BNPC), are also shown in Fig. 1.…”