A rapid microwave-assisted synthesis of silver nanoparticles using Ziziphus jujuba Mill fruit extract and their catalyti
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ORIGINAL PAPER
A rapid microwave‑assisted synthesis of silver nanoparticles using Ziziphus jujuba Mill fruit extract and their catalytic and antimicrobial properties Kondaiah Seku1 · Syed Sulaiman Hussaini1 · Babu Pejjai2 · Maryam Murad Shamal Al Balushi1 · Rajesh Dasari3 · Narasimha Golla4 · G. Bhagavanth Reddy5 Received: 17 April 2020 / Accepted: 3 October 2020 © Institute of Chemistry, Slovak Academy of Sciences 2020
Abstract An eco-friendly and sustainable approach was developed for the synthesis of silver nanoparticles (AgNPs) of Ziziphus jujuba Mill (ZJM) fruit extract by a microwave-assisted technique. The developed method was simple, economically viable, sustainable, and eco-friendly. Concentrations of A gNO3 and ZJM fruit extract and reaction time were optimized for the final properties of synthesized AgNPs. The prepared AgNPs were characterized by UV-visible and FTIR spectrophotometers, powder XRD, TEM, and DLS. XRD results showed a face-centered cubic structure for the prepared AgNPs. The obtained size of AgNPs was 8 ± 1 nm with spherical shape. The FTIR spectrum indicates that ZJM is a good capping agent to stabilize AgNPs. A negative zeta potentials value of − 21.2 mV indicates the stability of AgNPs. The AgNPs has good stability over a wide range of pH and ionic strength. The role and efficacy of AgNPs in the catalytic degradation of methylene blue (MB) and Congo red (CR) dye were studied, and the reduction reaction rate constants were found to be 0.033 s−1 (180 s) and 0.025 s−1 (200 s) respectively. The synthesized AgNPs showed rapid and excellent catalytic reduction of MB and CR dyes. The rapid catalytic reduction reactions followed pseudo-order kinetics. The ZJM fruit extract-capped AgNPs showed good antimicrobial activity against tested bacterial and fungal cultures. Keywords Microwave-assisted · Silver nanoparticles · Dye degradation · Antibacterial activity · Antifungal activity
Introduction
* Kondaiah Seku [email protected] * G. Bhagavanth Reddy [email protected] 1
Department of Chemistry, Shinas College of Technology, Shinas, Sultanate of Oman
2
Solar Photovoltaic Laboratory, Department of Physics, Sri Venkateswara University, Tirupati, India
3
Department of Humanities and Sciences, Jogin Pally B.R. Engineering College, Baskara Nagar, Hyderabad, Telangana, India
4
Department of Virology, Sri Venkateswara University, Tirupati, India
5
Department of Chemistry, Palamuru University P.G. Centre, Mahbubnagar, Telangana, India
Nanoscience and nanotechnology are playing a significant role (C. Huang et al. 2011) to address various problems such as water treatment, sustainable manufacture of chemicals, nanomedication, sensing of heavy metals in sewage water and solar energy, etc. The metal nanoparticles have remarkable optical, physical, thermal, and chemical properties (Ibrahim Khan et al. 2019). Among the various metal nanoparticles, AgNPs show characteristic properties like electrical, optical, absorption, and surface-enhanced Raman scattering mainly due to
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