Peroxidase Immobilized Cryogels for Phenolic Compounds Removal

Akpınar, Fatma; Evli, Sinem; Güven, Gülşen; Bayraktaroğlu, Melis; Kilimci, Ulviye; Uygun, Murat; Uygun, Deniz Aktaş

doi:10.1007/s12010-019-03083-1

Cited by 11 publications

(3 citation statements)

References 25 publications

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“…Peroxidase immobilized poly(acrylamide) cryogels were prepared and used for removal of phenol, bisphenol A, guaiacol, pyrogallol, and catechol from aqueous solution [48]. Maximum peroxidase loading onto poly(acrylamide) cryogel was found to be 127.3 mg⋅g -1 .…”

Section: Flow-through Catalytic Reactors Designed By Modification Of mentioning

confidence: 99%

Flow-Through Catalytic Reactors Based on Metal Nanoparticles Immobilized within Porous Polymeric Gels and Surfaces/Hollows of Polymeric Membranes

Kudaibergenov

Джардималиева

2020

Polymers

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State-of-the-art of flow-through catalytic reactors based on metal nanoparticles immobilized within the pores of nano-, micro- and macrosized polymeric gels and in the surface or hollow of polymeric membranes is discussed in this mini-review. The unique advantages of continuous flow-through nanocatalysis over the traditional batch-type analog are high activity, selectivity, productivity, recyclability, continuous operation, and purity of reaction products etc. The methods of fabrication of polymeric carriers and immobilization technique for metal nanoparticles on the surface of porous or hollow structures are considered. Several catalytic model reactions comprising of hydrolysis, decomposition, hydrogenation, oxidation, Suzuki coupling and enzymatic reactions in the flow system are exemplified. Realization of “on-off” switching mechanism for regulation of the rate of catalytic process through controlling the mass transfers of reactants in liquid media with the help of stimuli-responsive polymers is demonstrated. Comparative analysis of the efficiency of different flow-through catalytic reactors for various reactions is also surveyed.

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Section: Flow-through Catalytic Reactors Designed By Modification Of mentioning

confidence: 99%

Flow-Through Catalytic Reactors Based on Metal Nanoparticles Immobilized within Porous Polymeric Gels and Surfaces/Hollows of Polymeric Membranes

Kudaibergenov

Джардималиева

2020

Polymers

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“…Previously, we illustrated the synthesis of chitosanbased cryogels with in situ synthesized impregnated PdNP and AuNP, which show a high efficiency of nitrophenol reduction by borohydride and also the oxidation of benzaldehyde derivatives in aerated water [27][28][29]. Some researchers have shown the possibility of using immobilized peroxidase enzymes on cryogel to decompose phenol derivatives, but this approach is expensive [30]. In this study, an advanced PdNPs catalyst supported on macroporous hydrogel was developed for a hydrogen-free catalytic de-chlorination process.…”

Section: Introductionmentioning

confidence: 99%

Cryogels with Noble Metal Nanoparticles as Catalyst for “Green” Decomposition of Chlorophenols

Berillo

2023

Inorganics

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Pollution of the aquatic environment by halogen derivatives widely used as antiseptic compounds, as well as chemicals for various industrial purposes, is significant. Existing systems of bioremediation poorly solve the problem of eliminating pollution. This paper discusses the preparation of novel macroporous chitosan-based cryogels with in situ-immobilized Pd or Pt nanoparticles as a catalyst for dichlorination reactions. The formation mechanism of metal coordinated chitosan gels using Medusa software modelling and rheology (G’ and G’’) is discussed. Metal coordinated chitosan gels were subsequently converted into covalently cross-linked macroporous cryogels with in situ-immobilized Pd or Pt nanoparticles using the redox potentials difference of the reaction mixture. Noble metal nanoparticles of average size, 2.4 nm, were evenly distributed in the cryogel structure. The effectiveness of these gels as a catalyst for the decomposition of chloro-compounds o-chlorophenol, p-chlorophenol and 2,4-dichlorophenol was tested. The catalytic hydrogenation reaction was carried out using the “green reducing agent” formic acid. Increasing the excess of formic acid with heating increases the degree of conversion up to 80–90%. The CHI-GA-PdNPs cryogel at pH 6 showed better efficiency in the hydrogenation process compared to the CHI-GA-PtNPs cryogel; however, no significant difference in the degree of conversion at pH 3 was observed. The termination of a catalytic reaction in a batch mode have been studied. Several control tests were carried out to elucidate the mechanism of catalyst poisoning. The presented catalytic system may be of interest for studying reactions in a flow through mode, including the reactions for obtaining valuable chemicals.

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“…Several studies have been devoted to immobilization of amyloglucosidase and glucoamylase on poly(methyl methacrylate‐glycidyl methacrylate), herein P(MMA‐co‐GMA), and poly(glycidyl methacrylate‐ethyleneglycoldimethacrylate), herein p(GMA‐co‐EGDMA), cryogels, to be used as a flow‐through catalytic reactor for continuous glucose syrup production from starch 10,11 . Peroxidase encapsulated within poly(acrylamide) cryogels has been used for removal of phenol, bisphenol A, guaiacol, pyrogallol, and catechol from aqueous solutions 12 …”

Section: Introductionmentioning

confidence: 99%

Oxidation of iso‐propanol and n‐butanol by catalase encapsulated within macroporous polyampholyte cryogel matrix

Smagulova

Tatykhanova

Shakhvorostov

et al. 2021

Polymers for Advanced Techs

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Iso‐propanol and n‐butanol were oxidized using catalase encapsulated within monolithic polyampholyte cryogel, p(APTAC‐co‐AMPS), derived from an anionic monomer, 2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid sodium salt (AMPS), and a cationic monomer, (3‐acrylamidopropyl) trimethylammonium chloride (APTAC). Macroporous polyampholyte cryogels containing various amounts of catalase were synthesized in situ under cryo‐polymerization conditions at a molar ratio of monomers [APTAC]:[AMPS] = 75:25 mol.% in the presence of 10 mol.% cross‐linking agent, N,N‐methylenebisacrylamide (MBAA). The oxidation of alcohols was carried out inside of a monolithic macroporous sample by passing the mixture of alcohol and hydrogen peroxide through at a fixed flow‐rate. Analysis using gas–liquid chromatography and gas chromatography–mass spectrometry showed that iso‐propanol is converted to acetone at a yield of 87.6%, whereas n‐butanol is converted to butyraldehyde at a yield of 80% at 20°C and atmospheric pressure. The influence of pH, temperature, and ratios of substrate to hydrogen peroxide on the degree of conversion of iso‐propanol was evaluated. SEM images of cryogel‐encapsulated catalase before and after several cycles of oxidation of iso‐propanol show collapsing, among other alterations, in the morphology of the cryogel matrix. The oxidation mechanism of iso‐propanol and n‐butanol using cryogel‐encapsulated catalase was suggested.

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Peroxidase Immobilized Cryogels for Phenolic Compounds Removal

Cited by 11 publications

References 25 publications

Flow-Through Catalytic Reactors Based on Metal Nanoparticles Immobilized within Porous Polymeric Gels and Surfaces/Hollows of Polymeric Membranes

Flow-Through Catalytic Reactors Based on Metal Nanoparticles Immobilized within Porous Polymeric Gels and Surfaces/Hollows of Polymeric Membranes

Cryogels with Noble Metal Nanoparticles as Catalyst for “Green” Decomposition of Chlorophenols

Oxidation of iso‐propanol and n‐butanol by catalase encapsulated within macroporous polyampholyte cryogel matrix

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