Graphitic Carbon Nitride/Zinc Oxide-Based Z-Scheme and S-Scheme Heterojunction Photocatalysts for the Photodegradation of Organic Pollutants

International Journal of Molecular Sciences, Год журнала: 2023, Номер 24(19), С. 15021 - 15021

Опубликована: Окт. 9, 2023

Graphitic carbon nitride (g-C3N4), a metal-free polymer semiconductor, has been recognized as an attractive photocatalytic material for environmental remediation because of its low band gap, high thermal and photostability, chemical inertness, non-toxicity, cost, biocompatibility, optical electrical efficiency. However, g-C3N4 reported to suffer from many difficulties in applications, such specific surface area, inadequate visible-light utilization, charge recombination rate. To overcome these difficulties, the formation heterojunctions by coupling with metal oxides triggered tremendous interest recent years. In this regard, zinc oxide (ZnO) is being largely explored self-driven semiconductor photocatalyst form g-C3N4, ZnO possesses unique fascinating properties, including quantum efficiency, electron mobility, cost-effectiveness, friendliness, simple synthetic procedure. The synergistic effect adsorption photogenerated separation, was found enhance activity heterojunctions. Hence, review aims compile strategies fabricating g-C3N4/ZnO-based Z-scheme S-scheme heterojunction systems enhanced performance overall stability photodegradation organic pollutants. Furthermore, reference system, mechanism photocatalysts their charge-transfer pathways on interface are highlighted.

Язык: Английский

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Poly(Allylamine Hydrochloride) and ZnO Nanohybrid Coating for the Development of Hydrophobic, Antibacterial, and Biocompatible Textiles

Nanomaterials, Год журнала: 2024, Номер 14(7), С. 570 - 570

Опубликована: Март 25, 2024

In healthcare facilities, infections caused by Staphylococcus aureus (S. aureus) from textile materials are a cause for concern, and nanomaterials one of the solutions; however, their impact on safety biocompatibility with human body must not be neglected. This study aimed to develop novel multilayer coating poly(allylamine hydrochloride) (PAH) immobilized ZnO nanoparticles (ZnO NPs) make efficient antibacterial biocompatible cotton, polyester, nylon textiles. For this purpose, coated textiles were characterized profilometry, contact angles, electrokinetic analyzer measurements. The NPs analyzed scanning electron microscopy inductively coupled plasma mass spectrometry. tests conducted S. immortalized keratinocyte cells. results demonstrated successful PAH/ZnO formation textiles, demonstrating weak hydrophobic properties. Furthermore, PAH multilayers complete NP immobilization All showed strong growth inhibition (2–3-log reduction) in planktonic adhered bacterial viability was reduced more than 99%. Cotton, due its better adherence, slightly higher performance polyester nylon. procedure enables binding an amount (<30 µg cm−2) that, after dissolution, is significantly below concentration causing cytotoxicity (10 mL−1).

Язык: Английский

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Green synthesis of silver nanoparticles from southern Eucalyptus globulus: Potent antioxidants and photocatalysts for rhodamine B dye degradation

Desalination and Water Treatment, Год журнала: 2024, Номер 320, С. 100687 - 100687

Опубликована: Авг. 8, 2024

Nanotechnology and nanoscience provide innovative foundations for delivering a wide range of new enhanced technologies to the modern world. To break down Rhodamine B (RhB) dye solutions, this work describes creation silver nanoparticles (Ag-NPs) using aqueous leaf extract Eucalyptus globulus (E. globulus). The biosynthesized Ag-NPs were studied UV–vis spectroscopy SEM in conjunction with EDX, TEM, FTIR, HPLC XRD. Stable synthesized E. globulus, as evidenced by absorption peaks at 431 nm seen spectrum analysis. Spherical-shaped particles visible images, metallic form synthesised was verified EDX. initial concentration RhB, reaction duration, temperatures, pH all adjusted optimise photocatalytic degradation RhB Ag-NPs. results indicated that effectiveness increased rising pH. After 80 min room temperature, reached 91.20 % 12. antioxidant EC50 demonstrate exhibited higher level protective antioxidants (20.15 ± 0.3 µg/mL DPPH 10.24 0.2 ABTS) compared extracts.

Язык: Английский

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The Development of Alginate/Ag NPs/Caffeic Acid Composite Membranes as Adsorbents for Water Purification

Membranes, Год журнала: 2023, Номер 13(6), С. 591 - 591

Опубликована: Июнь 9, 2023

Since the water pollution problem still affects environmental system and human health, need to develop innovative membranes has become imperious. Lately, researchers have focused on developing novel materials help diminish contamination problem. The aim of present research was obtain adsorbent composite based a biodegradable polymer, alginate, remove toxic pollutants. Of all pollutants, lead chosen due its high toxicity. were successfully obtained through direct casting method. silver nanoparticles (Ag NPs) caffeic acid (CA) from kept at low concentrations, which proved enough bestow antimicrobial activity alginate membrane. characterised by Fourier transform infrared spectroscopy microscopy (FTIR), scanning electron (SEM), thermogravimetric analysis (TG-DSC). Swelling behaviour, ion (Pb2+) removal capacity, regeneration reusability also determined. Further, tested against selected pathogenic strains (S. aureus, E. faecalis sp., P. aeruginosa, coli C. albicans). presence Ag NPs CA improves newly developed membranes. Overall, are suitable for complex treatment (removal heavy metal ions treatment).

Язык: Английский

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Construction of atom co-sharing Bi/Bi4O5Br2 nanosheet heterojunction for plasmonic-enhanced visible-light-driven photocatalytic antibacterial activity

Colloids and Surfaces B Biointerfaces, Год журнала: 2024, Номер 238, С. 113923 - 113923

Опубликована: Апрель 18, 2024

Язык: Английский

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