The potential effect of Catharanthus roseus leaf extract for the formation of palladium nanoparticles and its application on dye degradation was discussed. The efficiency of C.roseus leaves are used as a bio-material for the first time as reducing agent. Synthesized palladium nanoparticles were supported by UV-vis spectrometry, XRD, FT-IR and TEM analysis. The secondary metabolites which are responsible for the formation of nanoparticles were identified by GC-MS. The results showed that effect of time was directly related to synthesized nanoparticles and functional groups has a critical role in reducing the metal ions and stabilizing the palladium nanoparticles in an eco-friendly process.

Mohana Roopan S

Department of Chemistry

School of Advanced Sciences

Vellore Campus

Madhumitha G

Ramalingam C

Department of Biotechnology

School of Bio Sciences and Technology

Kalaiselvi A

Elango G.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Zinc oxide (ZnO) nanoparticles (NPs) were synthesized by a conventional method using Pithecellobium dulce peel extract. The phytochemicals present in the peel act as stabilizing agents. The ZnO NPs were characterized by UV–vis spectroscopy, X-ray diffraction (XRD), scanning electron microscopy and transmission electron microscopy. The XRD pattern confirmed the formation of crystals, which exactly matched with JCPDS card no.36–1451. The nondestructive XRD pattern showed a hexagonal crystalline nature and scanning electron microscopy revealed a spherical shape. Further, the ZnO NPs exhibited excellent photodegradation efficiency with regard to the dye methyleneblue (MB), a major water pollutant released by the textile industry. A kinetic study of photodegradation of MB showed 63{\%} degradation and a rate constant of 0.00812 min−1. The antifungal activity of the ZnO NPs resulted in 37.81{\%} and 63.57{\%} inhibition of the growth of Aspergillus flavus and 40.21{\%} and 43.04{\%} of growth inhibition of Aspergillus niger at 500 and 1000 ppm of ZnO NPs, respectively.

Journal of Physics and Chemistry of Solids

Green synthesis, characterization and antifungal and photocatalytic activity of Pithecellobium dulce peel–mediated ZnO nanoparticles

The quality of natural water resources has been depleting due to the lack of proper treatment of effluent discharged from textile dyeing units. To impart color to the fabrics, synthetic dyes have been used which pose a serious threat to the environment due to their toxicity. The Complex structure of dyes has made them difficult to degrade. Therefore a perpetual method is needed to eradicate the dyes. Conventional methods arouse but they are not efficient as the derivatives of the complex dyes remain in the water even after the treatment and are expensive. In recent times, nanoparticles are found to be wholly effective. Notably, nanoparticles which are synthesized by biological methods took up many applications such as wastewater treatment, drug delivery, biosensors etc. Biological methods are eco-friendly, easily approachable and cost- effective. Biologically synthesized nanoparticles were found to have the ability to degrade toxic dyes. This review emphasizes the biological sources used for the synthesis of various metal nanoparticles, mechanism of degradation and their dye degradation efficiency. © 2019

Biocatalysis and Agricultural Biotechnology

The possible mechanism of eco-friendly synthesized nanoparticles on hazardous dyes degradation

Metal/metal oxide nanoparticles are considered to be the most important of several kinds of nanoparticles, having numerous applications in the biomedical field. There are many ways to synthesize metal/metal oxide nanoparticles, which include natural (Green), chemical and physical methods. But the main drawback to chemical or physical processes is their hazardous approach and elimination of toxic effluents, which cause a threat to the environment. To overcome this drawback, most researchers have been focusing on a biotechnological approach towards the synthesis of metal/metal oxide nanoparticles. In general, metal nanoparticles utilized in applications mingle with air and lead to some airborne diseases while metal oxide nanoparticles are very tiny in comparison. In this chapter, the most prominent research in the field of nanobiotechnology is discussed; moreover, an overview is given of metal/metal oxide nanoparticles and their applications. © 2018 Scrivener Publishing LLC.

Green Metal Nanoparticles

Current Scenario in Green Approaches for Metal/Metal Oxide Nanoparticles Synthesis

Materials Research Express

Synthesis of palladium nanoparticles via a green route using Lagenaria siceraria: assessment of their innate antidandruff, insecticidal and degradation activities

Polymer Gels Gels Horizons: From Science to Smart Materials

Radiation Dosimetry—A Different Perspective of Polymer Gel

A green rapid biogenic synthesis of silver nanoparticles AgNPs using Alternanthera dentata (A. dentata) aqueous extract was demonstrated in this present study. The formation of silver nanoparticles was confirmed by Surface Plasmon Resonance (SPR) at 430 nm using UV-visible spectrophotometer. The reduction of silver ions to silver nanoparticles by A. dentata extract was completed within 10 min. Synthesized nanoparticles were characterized using UV-visible spectroscopy; Fourier transformed infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy and transmission electron microscopy (TEM). The extracellular silver nanoparticles synthesis by aqueous leaf extract demonstrates rapid, simple and inexpensive method comparable to chemical and microbial methods. The colloidal solution of silver nanoparticles were found to exhibit antibacterial activity against Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumonia and, Enterococcus faecalis. © 2014 Elsevier B.V. All rights reserved.

Green synthesis of silver nanoparticles using Alternanthera dentata leaf extract at room temperature and their antimicrobial activity

Recently, in all over the world, nanotechnology plays a major role in various applications. Most of the researchers focused their work on bimetallic nanoparticles due to their several modes or mechanisms of synthesis such as chemical, physical, and biosynthesis methods. These nanoparticles are of great interest due to their enormous applications and catalytic activities. Currently, syntheses of bimetallic nanoparticles using different sources of natural products are focused due to their advantage of being nontoxic to human and environment. To our knowledge, there is no report on the review of bimetallic nanoparticles and their medicinal applications. Taking this fact into account, we discussed the various synthesizing methods of bimetallic nanoparticles and their application related to biology. © 2014 Springer-Verlag.

Applied Microbiology and Biotechnology

Biosynthetic trends and future aspects of bimetallic nanoparticles and its medicinal applications

Green chemistry is playing an important role for synthesizing organic compounds, due to its eco-friendly nature and low cost. In green chemistry, metal nanoparticles exhibited some useful physical and chemical properties (catalytic activity). Due to its diverse properties, nanoparticles can be utilized as a catalyst in various organic reactions. Recent research has been directed towards the utilization of eco-friendly and bio-friendly plant materials in nanoparticles synthesis. In our present work, TiO2 nanoparticles (TiO2 NPs) were synthesized using Annona squamosa peel extract and their catalytic applications were studied on the 2,3-disubstituted dihydroquinazolin-4(1H)-one synthesis. Synthesized compounds were confirmed using FT-IR, 1H NMR, 13C NMR and GC-MS analyses. © 2013 Selvaraj Mohana Roopan. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

Chinese Chemical Letters

Catalytic activity of TiO2 nanoparticles in the synthesis of some 2,3-disubstituted dihydroquinazolin-4(1H)-ones

Phyto-synthesis of transition metal nanoparticles is gaining importance due to their biocompatibility, low toxicity, green approach and environmental friendly nature. We used mesocarp layer extract of Cocos nucifera and was assessed for the synthesis of silver nanoparticles. The reduction of silver ions occurred when silver nitrate solution was treated with aqueous extract of C. nucifera coir at 60 °C. Synthesized silver nanoparticles (AgNPs) particles were confirmed by analysing the excitation of surface plasmon resonance (SPR) using UV-vis spectrophotometer at 433. nm. Further TEM analysis confirmed the range of particle size as 23 ± 2. nm. The XRD spectrum showed the characteristic Bragg peaks of 1. 1. 1, 2. 0. 0, 2. 2. 0 and 3. 1. 1 facets of the face centered cubic silver nanoparticles and confirms that these nanoparticles are crystalline in nature. Gas chromatography-mass spectrometry (GCMS) of coir extract confirms the presence of hydrocarbon such as nonacosane and heptacosane which may possibly influence the reduction process and stabilization of silver nanoparticles. This is the first account of C. nucifera coir assisted synthesis of biogenic Ag nanoparticles; the nanoparticles are notably smaller and better faceted compared with those synthesized by A. squamosa extracts previously reported. Synthesized Ag nanoparticles were effective anti-larvicidal agent's against Anopheles stephensi and C. quinquefasciatus. © 2012 Elsevier B.V.

Industrial Crops and Products

Low-cost and eco-friendly phyto-synthesis of silver nanoparticles using Cocos nucifera coir extract and its larvicidal activity

Integration of green chemistry principles to nanotechnology is one of the key issues in nanoscience research. Biological methods were used to synthesize metal and metal oxide nanoparticles of specific shape and size since they enhance the properties of nanoparticles in greener route. Plant-mediated methods devoid the use of toxic chemicals in the synthetic protocols which has adverse effects on the environment. Owing to the rich biodiversity of plants and their potential secondary constituents, plants and plant parts have gained attention in recent years as medium for nanoparticles' synthesis. In this review, we present the current status of nanoparticles synthesis using devastated crops.

Fulltext

Journal of Nanomaterials

Devastated Crops: Multifunctional Efficacy for the Production of Nanoparticles

Synthesis and characterization of palladium nanoparticles using Catharanthus roseus leaf extract and its application in the photo-catalytic degradation

Journal	Data powered by TypesetSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Publisher	Data powered by TypesetElsevier BV
ISSN	1386-1425
Open Access	No