Laccase immobilized on chitosan-polyacrylic acid microspheres as highly efficient biocatalyst for naphthol green B and indigo carmine degradation

Leontieş, Anca Ruxandra; Răducan, Adina; Culiță, Daniela C.; Alexandrescu, Elvira; Moroșan, Alina; Mihăiescu, Dan Eduard; Aricov, Ludmila

doi:10.1016/j.cej.2022.135654

Cited by 31 publications

(20 citation statements)

References 69 publications

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“…For instance, on this frequency interval, G′ is greater than G″, proving that the viscoelastic materials have good tolerance to external forces. Indicators of the strength of a gel are high values of G′ and G″, and also frequency independence of G′ [ 24 , 25 ]. As a result, we can say that systems 1, 2, 5, and 6 are the most resistant gels, as indicated by higher rheological moduli values and independence of the storage modulus (G′) on the applied frequency.…”

Section: Resultsmentioning

confidence: 99%

Formation of Alginate/Chitosan Interpenetrated Networks Revealed by EPR Spectroscopy

Joly

Aricov

Balan

et al. 2023

Gels

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This study analyzes the physico-chemical properties of interpenetrated polymer networks (IPNs) and semi-IPN resulting from cross-linking chitosan with glutaraldehyde and alginate with Ca2+ cations, as a function of the order in which the cross-linking agents are added to the polymer mixture. Three physico-chemical methods were used to assess the differences between systems: rheology, IR spectroscopy, and electron paramagnetic resonance (EPR) spectroscopy. While rheology and IR spectroscopy are commonly used to characterize gel materials, EPR spectroscopy is rarely used, but has the advantage of providing local information about the dynamics of a system. The rheological parameters, which describe the global behavior of the samples, show that semi-IPN systems have a weaker gel behavior and the order of introducing the cross-linker in the polymer systems plays a role. The IR spectra of samples resulting by adding only Ca2+ or Ca2+ as the first cross-linker are similar to that of the alginate gel, while the spectra of samples in which glutaraldehyde is firstly added resemble the chitosan gel spectrum. Using spin-labeled alginate and spin-labeled chitosan, we monitored the changes occurring in the dynamic of the spin labels due to the formation of IPN and semi-IPN. The results show that the order of adding the cross-linking agents influences the dynamic of the IPN network, and that the formation of the alginate network determines the characteristics of the entire IPN system. The EPR data were correlated with the rheological parameters and IR spectra of the analyzed samples.

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Section: Resultsmentioning

confidence: 99%

Formation of Alginate/Chitosan Interpenetrated Networks Revealed by EPR Spectroscopy

Joly

Aricov

Balan

et al. 2023

Gels

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“…Leontieș et al. [ 129a ] used chitosan‐polyacrylic acid microspheres as a support material with EDC as the crosslinker for the immobilization of laccase via a multi‐step approach. The idealistic representation of the immobilization procedure is shown in Figure .…”

Section: Applications Of Acrylic Microspheresmentioning

confidence: 99%

“…Of late, acrylic microspheres have proven to be efficient to act as support materials for immobilizing various enzymes. [ 129 ] Attributes such as having a large enough surface area via a porous structure are essential to achieve effective diffusion of reaction materials. [ 11a ] The immobilization process primarily involves the reaction between epoxy groups and amino groups present in the enzymes.…”

Section: Applications Of Acrylic Microspheresmentioning

confidence: 99%

Recent Progress in Intensifying Synthesis of Acrylic Microspheres for Catalysis

Gaddale

Kale

Srinivasan

et al. 2023

Adv Materials Inter

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Over the past decades, there has been an escalating rise in the need for chemicals and catalytic materials to keep up with global demands. Addressing those issues by conventional methods often becomes inefficient, with myriad operational risks. Process intensification methods through procedural and equipment‐based modifications have been considered greener, have higher heat and mass transfer rates, and operate with lower costs. In this review, research using ultrasonic reactors and microreactors, along with developments through an integrated external energy source, for synthesizing acrylic microspheres is covered extensively. Acrylic microspheres have garnered much interest for their biocompatibility, affinity toward functionalization, and wide range of applications. Core–shell, composite, functional‐group modified, and porous acrylic microspheres are used for enzyme immobilization and as catalyst carriers. The use of acrylic support has provided huge improvements in catalytic activity, reusability, recyclability, and overall stability. Finally, various other process intensification methods and alternate support materials are covered to help enhance future developments in the field of catalysis.

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“…Unprocessed discharge can severely harm the ecosystem . Common treatment technologies include adsorption, biocatalytic degradation, oxidation, chemical/electrocoagulation, and photodegradation, , with the latter being a green technology without secondary pollution gaining attention . In the process of photocatalytic oxidation for dye photodegradation, a common photocatalyst like TiO 2 , when irradiated with light energy exceeding its band gap energy (e.g., 3.2 eV for TiO 2 ), generates conduction band electrons (e CB – ) and valence band holes (h VB + ).…”

Section: Introductionmentioning

confidence: 99%

High-Efficiency Photocatalytic Reactors Fabricated via Rapid DLP 3D Printing: Enhanced Dye Photodegradation with Optimized TiO₂ Loading and Structural Design

Chen,

Wang,

Chen

et al. 2024

ACS EST Water

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The photocatalytic degradation of organic compounds is seen as a pivotal water treatment technology. While 3D printing has been proven to directly produce photocatalytic reactors, research in this area, especially utilizing mass-production-capable vat photopolymerization (VP)-based 3D printing, remains in its early stages. This study aimed to prepare high-solid content printing slurries (up to 50 wt %) using the common TiO 2 nanoparticle (P25) photocatalyst to rapidly print reactors with high photodegradation efficiency. The 3D-printed photocatalytic reactors, made by using the prepared slurry, successfully demonstrated complete 100% photodegradation of common organic synthetic dyes (methylene blue, safranin O, and brilliant green). Moreover, photocatalytic reactors with triply periodic minimal surface (TPMS) structures were successfully printed. The reactors with a Diamond structural (D-type) design showed a reaction rate constant of 0.0127 min −1 , which is 2.4 times higher than that of the Fischer-Koch S structural (F-type) reactors at 0.005 min −1 , underscoring the significant impact of reactor structural design on photodegradation efficiency. Finally, the study showcased the potential for direct manufacturing through the batch production of photocatalytic reactors via whole build-plate 3D printing. Achieving high-speed fabrication, the process was completed within 120 min on a 19.2 cm by 10.8 cm build platform, accommodating the batch printing of 10 photocatalytic reactors, each 1.3 cm in diameter and 2 cm in height.

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Laccase immobilized on chitosan-polyacrylic acid microspheres as highly efficient biocatalyst for naphthol green B and indigo carmine degradation

Cited by 31 publications

References 69 publications

Formation of Alginate/Chitosan Interpenetrated Networks Revealed by EPR Spectroscopy

Formation of Alginate/Chitosan Interpenetrated Networks Revealed by EPR Spectroscopy

Recent Progress in Intensifying Synthesis of Acrylic Microspheres for Catalysis

High-Efficiency Photocatalytic Reactors Fabricated via Rapid DLP 3D Printing: Enhanced Dye Photodegradation with Optimized TiO₂ Loading and Structural Design

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Laccase immobilized on chitosan-polyacrylic acid microspheres as highly efficient biocatalyst for naphthol green B and indigo carmine degradation

Cited by 31 publications

References 69 publications

Formation of Alginate/Chitosan Interpenetrated Networks Revealed by EPR Spectroscopy

Formation of Alginate/Chitosan Interpenetrated Networks Revealed by EPR Spectroscopy

Recent Progress in Intensifying Synthesis of Acrylic Microspheres for Catalysis

High-Efficiency Photocatalytic Reactors Fabricated via Rapid DLP 3D Printing: Enhanced Dye Photodegradation with Optimized TiO2 Loading and Structural Design

Contact Info

Product

Resources

About

High-Efficiency Photocatalytic Reactors Fabricated via Rapid DLP 3D Printing: Enhanced Dye Photodegradation with Optimized TiO₂ Loading and Structural Design