1. Green synthesis of a magnetite/graphitic carbon nitride 2D nanocomposite for efficient ▫$Hg^{2+}$▫ remediationRaghuraj S. Chouhan, Jan Gačnik, Igor Živković, Sreekanth Vijayakumaran Nair, Nigel Willy Van de Velde, Alenka Vesel, Primož Šket, Sonu Gandhi, Ivan Jerman, Milena Horvat, 2023, izvirni znanstveni članek Povzetek: Novel nanoadsorbents demonstrate the potential to efficiently eliminate harmful substances, such as Hg2+, from the environment while preserving ecological balance. However, the search for environmentally-friendly nanomaterials as ideal adsorbents, as well as the development of suitable synthesis protocols, remains a challenge. This study presents an effective thermal-sonication technique for producing unique de novo tris-s-triazine carbon nitride nanosheets decorated with magnetite nanoparticles (M-g-CN). The structural integrity and chemical properties of the M-g-CN nanocomposite were extensively characterized using a battery of analytical instruments, including FTIR, SEM, TEM, XRD, XPS, AFM, Raman, and NMR. The obtained data, along with the analysis results, are discussed in detail. The novel synthesis method yields a high percentage (97.7%) of stable, highly selective, and reusable M-g-CN (40 mg mL−1). The resulting M-g-CN effectively binds Hg2+, with binding efficiencies of 96.0%, 97.5%, 98.2%, and 99.4% for Hg2+ concentrations of 50 pg mL−1 in marine, stream, precipitation, and ultra-pure matrices, respectively. Also, the magnetite-decorated particles can be easily retrieved using an applied magnetic field. This greener and scalable synthesis method does not require harsh chemicals, making it cost-effective, eco-friendly, and non-toxic compared to other technologies such as carbon filters, ion exchange resins, chemical precipitation, membrane filtration, electrochemical methods, and biological remediation. Overall, the synthesized M-g-CN exhibits wide-ranging potential applications, particularly as a green adsorbent in passive samplers or materials for remediation purposes.
Ključne besede: mercury, elimination, nanoadsorbents, nanocomposites
Objavljeno v DiRROS: 05.01.2026; Ogledov: 282; Prenosov: 108
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2. Boosting copper biocidal activity by silver decoration and few-layer graphene in coatings on textile fibersDanaja Štular, Nigel Willy Van de Velde, Ana Drinčić, Polona Kogovšek, Arijana Filipić, Katja Fric, Barbara Simončič, Brigita Tomšič, Raghuraj S. Chouhan, Sivasambu Bohm, Suresh Kr. Verma, P.K. Panda, Ivan Jerman, 2023, izvirni znanstveni članek Povzetek: The outbreak of the Coronavirus disease 2019 (COVID-19) pandemic has highlighted the importance of developing antiviral surface coatings that are capable of repelling pathogens and neutralizing them through self-sanitizing properties. In this study, a novel coating design based on few-layer graphene (FLG) is proposed and silver-decorated micro copper flakes (CuMF) that exhibit both antibacterial and antiviral properties. The role of sacrificial anode surfaces and intrinsic graphene defects in enhancing the release of metal ions from CuMF embedded in water-based binders is investigated. In silico analysis is conducted to better understand the molecular interactions of pathogen-repelling species with bacterial or bacteriophage proteins. The results show that the optimal amount of CuMF/FLG in the coating leads to a significant reduction in bacterial growth, with reductions of 3.17 and 9.81 log for Staphylococcus aureus and Escherichia coli, respectively. The same coating also showed high antiviral efficacy, reducing bacteriophage phi6 by 5.53 log. The antiviral efficiency of the coating is find to be doubled compared to either micro copper flakes or few-layer graphene alone. This novel coating design is versatile and can be applied to various substrates, such as personal protective clothing and face masks, to provide biocidal activity against both bacterial and viral pathogens.
Ključne besede: antibacterial, antiviral, copper micro flakes, few-layer graphene, pathogen-repelling coating
Objavljeno v DiRROS: 16.12.2025; Ogledov: 220; Prenosov: 147
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3. Growth manipulation in electrodeposition of compact and mesoporous electron transport layers for enhanced efficiency and stability in carbon-based perovskite solar cellsTecush Mohammadi, Dimitris A. Chalkias, Nigel Willy Van de Velde, Andrej Race, Elias Stathatos, Boštjan Genorio, Blaž Likozar, Ivan Jerman, 2025, izvirni znanstveni članek Ključne besede: perovskite solar cell, electron transport layer, TiO2 electrodeposition, compact layer, mesoporous layer, photovoltaic performance
Objavljeno v DiRROS: 03.03.2025; Ogledov: 685; Prenosov: 360
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4. Utilisation of waste Cu-, Mn- and Fe-loaded zeolites generated after wastewater treatment as catalysts for air treatmentMia Stanković, Margarita Popova, Matjaž Mazaj, Goran Dražić, Andraž Šuligoj, Nigel Willy Van de Velde, Mojca Opresnik, Željko Jaćimović, Nataša Novak Tušar, Nataša Zabukovec Logar, 2022, izvirni znanstveni članek Objavljeno v DiRROS: 13.12.2022; Ogledov: 1628; Prenosov: 1019
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5. Correlating structural properties with electrochemical behavior of non-graphitizable carbons in Na-ion batteriesBlaž Tratnik, Nigel Willy Van de Velde, Ivan Jerman, Gregor Kapun, Elena Tchernychova, Matija Tomšič, Andrej Jamnik, Boštjan Genorio, Alen Vižintin, Robert Dominko, 2022, izvirni znanstveni članek Objavljeno v DiRROS: 02.11.2022; Ogledov: 1764; Prenosov: 1023
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