Evidence map›Paper›PMID 41484736›Full record

ArticleApplied biochemistry and biotechnology2026

Layered Polymeric Carbon Nitride as a Green Support for Cellulase Immobilization: Improved Stability, Activity, and Reusability.

Nuri Gulesci, Orhan Altan, Ali Toprak, M Serkan Yalçın, Ramazan Bilgin, Deniz Yildirim

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Article in Applied biochemistry and biotechnology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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2 · The registry

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

6 authors.

Nuri GulesciDepartment of Occupational Health and Safety, Faculty of Health Sciences, University of Gumushane, Gumushane, Türkiye. nurigulesci@gumushane.edu.tr.ORCID http://orcid.org/0000-0002-1255-2772
Orhan AltanDepartment of Chemistry and Chemical Processing Technologies, Vocational School of Technical Science, University of Mersin, Mersin, Türkiye.
Ali ToprakDepartment of Chemistry and Chemical Processing Technologies, Vocational School of Acigol, University of Nevsehir Haci Bektas Veli, Nevsehir, Türkiye.
M Serkan YalçınDepartment of Chemistry and Chemical Processing Technologies, Vocational School of Technical Science, University of Mersin, Mersin, Türkiye.
Ramazan BilginDepartment of Chemistry, Faculty of Sciences & Letters, University of Cukurova, Adana, Türkiye.
Deniz YildirimDepartment of Chemical Engineering, Faculty of Engineering, University of Cukurova, Adana, Türkiye. dyildirim@cu.edu.tr.ORCID http://orcid.org/0000-0002-5041-8160

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Polymeric carbon nitride (PCN) has attracted considerable attention in recent years due to its layered structure and donor groups such as terminal amines and triazine units. In this study, PCN was synthesized from melamine and employed for the first time as a support material for the immobilization of cellulase, a key enzyme used in numerous industrial applications. Transmission electron microscopy (TEM) analysis revealed that ranged from 219 to 375 nm in size, thereby confirming their nanoscale layered morphology. Cellulase from Aspergillus sp. was immobilized onto PCN using three methods. In the first approach, cellulase was adsorbed onto PCN to form PCN@cellulase. In the second method, PCN@cellulase was cross-linked with glutaraldehyde (PCN@cellulase/Glu). Finally, the primary amino group of PCN was modified with glutaraldehyde, and the cellulase was immobilized onto this support via covalent attachment (PCN/Glu@cellulase). Each cellulase preparation was assessed for its optimal pH, temperature conditions, thermal stability, and enzyme kinetics. The optimal pH was 5.5 for all cellulase preparations, while the optimal temperature was 45 °C for free cellulase and 55 °C for all immobilized cellulase preparations. Thermal stability of PCN@cellulase, PCN@cellulase/Glu, and PCN/Glu@cellulase increased by 2.1-, 2.7-, and 3.7-fold, respectively, compared to the free cellulase. PCN/Glu@cellulase showed a 1.4-fold higher catalytic efficiency than the free cellulase and retained 80% of its initial activity after 10 reuses. This work highlights PCN as a green, metal-free, and easy-to-prepare support for enzyme immobilization, thereby opening new possibilities for sustainable bioprocessing applications.

Indexed as

CellulaseEnzymes, ImmobilizedNitrilesPolymersAspergillusEnzyme StabilityGlutaralHydrogen-Ion ConcentrationKineticsTemperatureCellulasecyanogenEnzymes, ImmobilizedGlutaralNitrilesPolymersCellulaseImmobilizationPolymeric carbon nitrideStability

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.