Green synthesis of silver nanoparticles using Mentha crispa L. leaf extract for treatment of dye wastewater

Authors

  • Thi Minh Dinh
  • Khac Khoi Tran
  • Anh Trung Le
  • Thi Minh Nguyet Nguyen
  • Thi Hue Do*
  • Ian Liau

Keywords:

dyeing wastewater, green synthesis, Mentha crispa L., silver nanoparticles, sweet basil

Abstract

Mentha crispa L. is one of Vietnam’s most precious folk medicines and is also a spice used in many delicious dishes in Vietnam and around the world. The use of Mentha crispa L. leaf extract as a reducing agent for Ag+ ions to synthesize silver nanoparticles is discussed in this paper. Single silver nanospheres were dispersed in biological media and their sizes were controlled in the range of 20-80 nm. Factors affecting particle size and shape such as extract concentration, AgNO3 concentration, reaction time, and temperature were investigated to determine the optimal parameters for particle synthesis. The optical properties, dispersion, crystal structure, morphology, and sizes of silver nanoparticles were investigated through UV-Vis absorption spectroscopy, dynamic light scattering (DLS) measurements, X-ray diffraction, and transmission electron microscopy (TEM). The functional groups on the L.AgNPs were determined by Fourier-transform infrared (FTIR) transmittance spectra. The synthesised silver nanoparticles were used to treat methylene blue (MB) dye, the main component of dye wastewater, based on their photocatalytic properties. The results show that in the presence of L.AgNPs, the photodegradation efficiency of NaBH4 or H2O2 reducing agents is much higher, up to 95% of illumination.

DOI:

https://doi.org/10.31276/VJSTE.65(3).14-20

Classification number

2.2

Author Biographies

Thi Minh Dinh

Dai Tu High School, Hung Son Town, Dai Tu District, Thai Nguyen Province, Vietnam

Khac Khoi Tran

Faculty of Physics, Thai Nguyen University of Education, 20 Luong Ngoc Quyen Street, Quang Trung Ward, Thai Nguyen City, Thai Nguyen Province, Vietnam

Faculty of Fundamental Science, Phenikaa University, Nguyen Van Trac Street, Yen Nghia Ward, Ha Dong District, Hanoi, Vietnam

Anh Trung Le

Faculty of Physics, Thai Nguyen University of Education, 20 Luong Ngoc Quyen Street, Quang Trung Ward, Thai Nguyen City, Thai Nguyen Province, Vietnam

Thi Minh Nguyet Nguyen

Faculty of Physics, Thai Nguyen University of Education, 20 Luong Ngoc Quyen Street, Quang Trung Ward, Thai Nguyen City, Thai Nguyen Province, Vietnam

Thi Hue Do

Faculty of Physics, Thai Nguyen University of Education, 20 Luong Ngoc Quyen Street, Quang Trung Ward, Thai Nguyen City, Thai Nguyen Province, Vietnam

Ian Liau

Department of Applied Chemistry, National Yang-Ming Chiao-Tung University, 1001, University Road, Hsinchu 300, Taiwan

Downloads

Published

2023-09-15

Received 25 October 2022; revised 29 December 2022; accepted 5 January 2023

How to Cite

Thi Minh Dinh, Khac Khoi Tran, Anh Trung Le, Thi Minh Nguyet Nguyen, Thi Hue Do, & Ian Liau. (2023). Green synthesis of silver nanoparticles using Mentha crispa L. leaf extract for treatment of dye wastewater. Vietnam Journal of Science, Technology and Engineering, 65(3), 14-20. https://doi.org/10.31276/VJSTE.65(3).14-20

Issue

Section

Physical Sciences