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Bio-Inspired ZnO Nanoparticles for Antibacterial and Photocatalytic Applications

Students & Supervisors

Student Authors
H.m. Fahim
Bachelor of Science in Computer Science & Engineering, FST
Jannatul Mawa Rodela
Bachelor of Science in Computer Science & Engineering, FST
Syeda Tanha Hossain Progga
Bachelor of Science in Computer Science & Engineering, FST
Supervisors
Dr. Farzana Sabeth
Associate Professor, Faculty, FST
Bithi Paul
Assistant Professor, Faculty, FST

Abstract

Objectives: To study the potential of plant-mediated synthesis for producing functional ZnO nanomaterials with applications in antimicrobial coatings and environmental remediation, while offering an environmentally benign alternative to conventional chemical synthesis routes. Materials and Methods: The aqueous extracts of Chrysanthemum grandiflorum and Plumeria rubra flowers were utilized as reducing and capping agents for the eco-friendly synthesis of YCM-ZnO and KG-ZnO NPs . XRD, FTIR, UV-Vis spectroscopy, FESEM were used for characterization. Results: X-ray diffraction (XRD) confirmed the hexagonal wurtzite phase with crystallite sizes of 37 nm (KG-ZnO) and 43 nm (YCM-ZnO). UV–visible spectroscopy showed band gaps of 2.98 eV (KG-ZnO) and 2.90 eV (YCM-ZnO). FESEM and TEM revealed predominantly spherical to hexagonal morphologies, while FTIR indicated phytochemical capping from the extracts. Both nanoparticle types displayed similar antibacterial activity against Gram-positive and Gram-negative bacteria. Photocatalytic degradation of methylene blue (MB) under visible light was higher for YCM-ZnO (90%) than KG-ZnO (85%). Conclusion(s): Extract effect on the green synthesis of ZnO nanoparticles has been studied. Overall, the results highlight plant-mediated synthesis as an eco-friendly approach for producing ZnO nanoparticles with potential applications in antimicrobial surfaces and wastewater treatment.

Keywords

ZnO nanoparticles plant extract green synthesis antibacterial activity photocatalysis nanomaterials characterization.

Publication Details

  • Type of Publication:
  • Conference Name: 6 th International Conference on "Physics for Sustainable Development & Technology (ICPSDT)-2025”
  • Date of Conference: 29/10/2025 - 29/10/2025
  • Venue: CUET
  • Organizer: Department of Physics, CUET