Title: Screening of plant extracts for green synthesis of Ag Nanoparticles

Abstract:

One of the most famous areas is nanotechnology because its application is available for several research. Especially, metal nanoparticles (MNPs) can be developed for biofuel cells, ion batteries, medical field, and sensing device. The MNPs are nanosized metals (1-100nm) that have optoelectronic and biochemical characteristics. Silver nanoparticles (AgNPs) are one of the most attractive materials because of various applications including pharmaceutics, textile industries, and agriculture. Green synthesis is integrated in production of AgNPs to sustain and save for environments. Therefore, the plant extracts for AgNPs synthesis are promising methods and low cost. In this work, we have tried to synthesize AgNPs by Thai local plant extract to apply for detection of heavy metal. Roselle, butterfly pea, and turmeric have been chosen to test the characteristics of AgNPs. For preparation of plant extracts, 10 grams of all plants are dried and boiled with 100 mL deionized water and absolute ethanol for 30 min. All boiled plant extracts were cooled down and filtered with filter paper. For preparation of AgNPs, 2 mL of plant extracts were added to 10mL of 1mM AgNO3 solution. The reaction (reduction of Ag+ ions to Ag0) was tested at 1, 2, 3, 4, and 24 hours by UV-Vis absorption spectra. In addition, Transmission electron microscopy (TEM) was used to compare the images of the AgNPs obtained after 24 hours of reaction.

Biography:

Kitiyaporn Pongpratead is a lecturer in physical chemistry at the Department of Applied Sciences and Engineering. The educational background in chemistry and physical chemistry for bachelor's and doctoral degrees, respectively. After graduation, she was a postdoctoral researcher at the University of Strathclyde in the UK for 3 years. She also got a research scholar for 2 years at Michigan State University. Then, she got a permanent job in Thailand as a lecturer at Khonkaen University, Nong Khai campus. Her research is about the computational chemistry of biomolecular systems for drug design. In addition, she works on environmental chemistry that involves wastewater treatment and wastewater analysis.