Phytogenic synthesis of Ag@ZIF-8 using rosemary extract for enhanced visible-light photodegradation of dyes and antibiotics with antibacterial activity
Year: 2025
Type: article
Abstract: This study presents a green synthesis of silver nanoparticle-decorated zeolitic imidazolate framework-8 (Ag@ZIF-8) using rosemary ( Rosmarinus officinalis ) extract as a phytogenic reducing agent. The resulting composites were thoroughly characterized by XRD, FT-IR, SEM, TEM, EDX mapping, XPS, DLS, and UV–Vis DRS analyses, confirming successful incorporation of well-dispersed Ag nanoparticles within the ZIF-8 matrix without compromising its crystalline structure. Among the synthesized materials, the Ag@ZIF-8 composite prepared with 6 mM AgNO₃ (RAZ3) exhibited optimal photocatalytic activity, achieving degradation efficiencies of 94.33 % for reactive blue 19 (RB19) and 93.4 % for oxytetracycline (OTC) under visible light within 180 min. The photocatalytic performance was influenced by catalyst dosage, pollutant concentration, and solution pH. Radical scavenger experiments revealed that photogenerated holes (h⁺) and hydroxyl radicals ( • OH) were the dominant species in RB19 degradation, while electrons (e⁻) and superoxide radicals ( • O₂⁻) played key roles in OTC removal. In addition to its high reusability, the Ag@ZIF-8 composite demonstrated significant antibacterial activity, inhibiting the growth of Escherichia coli, S. aureus, B. subtilis , and P. aeruginosa , with the highest efficiency observed at 50 ppm. The study highlights the potential of Ag@ZIF-8 synthesized via eco-friendly methods as a multifunctional material for wastewater remediation and microbial disinfection.
Source: Results in Engineering
Authors: Thi Hong Anh Nguyen, Ai Le Hoang Pham, Ngoc Thang Tran, Minh Quan Tran, Van Cuong Nguyen
Institution: Industrial University of Ho Chi Minh City
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,940
OpenAlex ID: W4416024705