Low-temperature biosynthesis of silver nanoparticles using mango leaf extract: catalytic effect, antioxidant properties, anticancer activity and application for colorimetric sensing

2018 ◽  
Vol 42 (19) ◽  
pp. 15905-15916 ◽  
Author(s):  
Fayezeh Samari ◽  
Hossein Salehipoor ◽  
Ebrahim Eftekhar ◽  
Saeed Yousefinejad
Keyword(s):  
Silver Nanoparticles ◽  
Low Temperature ◽  
Leaf Extract ◽  
Catalytic Effect ◽  
Low Cost ◽  
Antioxidant Properties ◽  
Single Step ◽  
Capping Agent ◽  
Green Process ◽  
Colorimetric Sensing

Aqueous mango leaf extract was used as a reducing and capping agent for the biosynthesis of silver nanoparticles (AgNPs)viaa single-step, low cost and green process.

Size-controlled fabrication of silver nanoparticles using the Hedyotis puberula leaf extract: toxicity on mosquito vectors and impact on biological control agents

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 96573-96583 ◽  
Author(s):  
Raja Mohamed Sait Thameem Azarudeen ◽  
Marimuthu Govindarajan ◽  
Abubucker Amsath ◽  
Shine Kadaikunnan ◽  
Naiyf S. Alharbi ◽  
...  
Keyword(s):  
Biological Control ◽  
Silver Nanoparticles ◽  
Leaf Extract ◽  
Low Cost ◽  
Aquatic Organisms ◽  
Capping Agent ◽  
Mosquito Vectors ◽  
Biological Control Agents ◽  
Size Controlled ◽  
Control Tool

As a low-cost and eco-friendly control tool, Ag nanoparticles were fabricated usingHedyotis puberulaaqueous extract as a reducing and capping agent and showed potent activity against malaria and arbovirus vectors with low biotoxicity against non-target aquatic organisms.

scholarly journals Low-cost and eco-friendly green synthesis of silver nanoparticles using Prunus japonica (Rosaceae) leaf extract and their antibacterial, antioxidant properties

2016 ◽  
Vol 45 (6) ◽  
pp. 1165-1171 ◽  
Author(s):  
Arthanari Saravanakumar ◽  
Mei Mei Peng ◽  
Mani Ganesh ◽  
Jayabalan Jayaprakash ◽  
Murugan Mohankumar ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Leaf Extract ◽  
Low Cost ◽  
Antioxidant Properties

Towards high-performance, low-cost quartz sensors with high-density, well-separated, vertically aligned ZnO nanowires by low-temperature, seed-less, single-step, double-sided growth

2013 ◽  
Vol 24 (35) ◽  
pp. 355503 ◽  
Author(s):  
Andrea Orsini ◽  
Pier Gianni Medaglia ◽  
David Scarpellini ◽  
Roberto Pizzoferrato ◽  
Christian Falconi
Keyword(s):  
Low Temperature ◽  
High Performance ◽  
Low Cost ◽  
Single Step ◽  
Zno Nanowires ◽  
High Density ◽  
Vertically Aligned

Effect of Surfactant on the Morphology of Silver Nanoparticles

2007 ◽  
Vol 124-126 ◽  
pp. 1205-1208 ◽  
Author(s):  
Keun Ju Park ◽  
Dong Seok Seo ◽  
Woo Yang Jang ◽  
Jong Kook Lee
Keyword(s):  
Silver Nanoparticles ◽  
Ascorbic Acid ◽  
Low Temperature ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Sodium Dodecyl ◽  
Capping Agent ◽  
Silver Particles ◽  
Chemical Reduction Method ◽  
20 Nm

Nano-sized silver particles are considered to apply a silver paste for electrode because of its high conductivity on sintering at low temperature. In this study, silver nanoparticles as seeds were prepared by chemical reduction method with capping agent. Silver particles were prepared using SDS (Sodium dodecyl sulfate) as a surfactant and silver nanoparticles as seeds and reacted with ascorbic acid as a reduction agent. The silver seeds with 10-20 nm in size with uniform distribution were formed and the size and shape of silver particles were strongly dependent on the concentration of surfactant.

scholarly journals Chitosan Stabilized Silver Nanoparticles for the Electrochemical Detection of Lipopolysaccharide: A Facile Biosensing Approach for Gram-Negative Bacteria

Micromachines ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 413 ◽  
Author(s):  
Muhammad Imran ◽  
Christopher J. Ehrhardt ◽  
Massimo F. Bertino ◽  
Muhammad R. Shah ◽  
Vamsi K. Yadavalli
Keyword(s):  
Silver Nanoparticles ◽  
Low Cost ◽  
Age Groups ◽  
Single Step ◽  
Indirect Detection ◽  
Detection Methods ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
E Coli ◽  
Strong Electrostatic Interaction

Negatively charged lipopolysaccharide (LPS), a major endotoxin and component of the outer membrane of several Gram-negative bacteria, provides a useful biomarker for the indirect detection of these pathogens. For instance, Escherichia coli (E. coli) is a pathogenic bacterium that causes infections in almost all age groups, and has been implicated in food and water contamination. Current diagnostic and detection methods tend to be labor-intensive or expensive, necessitating the need for an easy, sensitive, rapid, and low-cost method. We report on the synthesis and use of positively charged chitosan stabilized silver nanoparticles (Chi-AgNPs) as a sensitive electrochemical nanobiosensor for the detection of LPS. Chi-AgNPs were synthesized through a facile, single step protocol, and characterized for size, charge, and morphology. Glassy carbon electrodes modified with Chi-AgNPs resulted in an enhancement of signal in the presence of both LPS and E. coli. Detection was accomplished over a large concentration range (several orders of magnitude) of 0.001–100 ng/mL and 10–107 CFU/mL. The biosensors can reliably detect LPS and E. coli at very low concentrations. Chi-AgNPs have potential as low cost, sensitive nanobiosensors for Gram-negative bacteria due to strong electrostatic interaction with LPS present in their outer membranes.

Preparation of MoB2 Nanoparticles by Electrolysis of MoS2/B Mixture in Molten NaCl-KCl at 700 oC

2021 ◽  
Author(s):  
Xianglin Liu ◽  
Yongsong Ma ◽  
Peng Li ◽  
Huayi Yin ◽  
Dihua Wang
Keyword(s):  
Low Temperature ◽  
Raw Materials ◽  
Low Cost ◽  
Cell Voltage ◽  
Molar Ratio ◽  
Carbon Anode ◽  
Electrolysis Cell ◽  
Green Process ◽  
Synthetic Process ◽  
Electrolysis Method

Abstract MoB2 is synthesized by the electrochemical reduction of solid MoS2/B mixture in molten NaCl-KCl at 700 oC. Unlike the traditional methods, the electrolysis method employs the low-cost MoS2 feedstock and the boronization reaction happens at a low temperature of 700 oC. The electrochemically induced boronization involves two steps: the electrochemical desulfurization to generate Mo and the reaction of Mo with B to form MoB2. The S2- released from the reduction of MoS2 transfers to the carbon anode and is oxidized to sulfur gas, realizing a green synthetic process. In addition, the influences of molar ratio of MoS2 and amorphous boron and electrolysis cell voltage on the phase composition and morphology of electrolytic products were studied. The obtained MoB2 particles possess a uniform nodular morphology. Overall, this paper provides a straightforward and green process to prepare MoB2 nanoparticles using economically affordable raw materials at low temperature, and this method can be extended to prepare other borides.

scholarly journals Nanocomposite Inks Based on Nickel–Silver Core–Shell and Silver Nanoparticles for Fabrication Conductive Coatings at Low-Temperature Sintering

2021 ◽  
Vol 5 (1) ◽  
pp. 15
Author(s):  
Anna Pajor-Świerzy ◽  
Franciszek Szendera ◽  
Radosław Pawłowski ◽  
Krzysztof Szczepanowicz
Keyword(s):  
Silver Nanoparticles ◽  
Low Temperature ◽  
Low Cost ◽  
Future Application ◽  
Core Shell ◽  
Low Temperature Sintering ◽  
Ag Nps ◽  
Conductive Coatings ◽  
Nickel Silver ◽  
Silver Core

Nanocomposite inks composed of nickel–silver core–shell and silver nanoparticles (NPs) can combine the advantages of lower cost, high conductivity, and low-temperature sintering processes, which have attracted much attention in the development of materials for printed flexible electronics. In this context, in the present paper, we report the process of preparation of nanocomposite ink containing nickel–silver core–shell nanoparticles, as the main filler, and silver nanoparticles, as doping material, and their application for the fabrication of conductive coatings. It was found that the addition of a low concentration of Ag NPs to ink formulation based mainly on low-cost Ni-Ag NPs improves the conductive properties of coatings fabricated by ink deposition on a glass substrate. Two types of prepared nanocomposite ink coatings showed promising properties for future application: (1) doped with 0.5% of Ag NPs sintered at 200 °C as low cost for larger industrial application and, (2) containing 1% of Ag NPs sintered at 150 °C for the fabrication of conductive printed patterns on flexible substrates. The conductivity of such nanocomposite films was similar, about of 6 × 106 S/m, which corresponds to 35% of that for a bulk nickel.

scholarly journals Cytotoxic, Antimitotic, DNA Binding, Photocatalytic, H2O2 Sensing, and Antioxidant Properties of Biofabricated Silver Nanoparticles Using Leaf Extract of Bryophyllum pinnatum (Lam.) Oken

2021 ◽  
Vol 7 ◽  
Author(s):  
Sandip Kumar Chandraker ◽  
Mishri Lal ◽  
Preeti Dhruve ◽  
Rana P. Singh ◽  
Ravindra Shukla
Keyword(s):  
Silver Nanoparticles ◽  
Cell Line ◽  
Leaf Extract ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Perennial Herb ◽  
Root Tip ◽  
Synthetic Approach ◽  
Vis Spectroscopy ◽  
Bryophyllum Pinnatum

Bryophyllum pinnatum is a perennial herb traditionally used in ethnomedicine. In the present report, silver nanoparticles (AgNPs) were synthesized using B. pinnatum leaf extract. BP-AgNPs were confirmed following UV-Vis spectroscopy with SPR peak at 412 nm and further characterized by FTIR, XRD, SEM-EDX, and TEM. Microscopic images confirmed the spherical shape and ~15 nm average size of nanostructures. BP-AgNPs were evaluated for photocatalytic degradation of hazardous dyes (methylene blue and Rhodamine-B) and showed their complete reduction within 100 and 110 min., respectively. BP-AgNPs have emerged as a unique SPR-based novel sensor for the detection of H2O2, which may deliver exciting prospects in clinical and industrial areas. DPPH and ABTS free radical scavenging activity were studied with respective IC50 values of 89 and 259 μg/mL. A strong intercalating interaction of CT-DNA with BP-AgNPs was investigated. Observed chromosomal abnormalities confirm the antimitotic potential of BP-AgNPs in the meristematic root tip. The cytotoxicity of BP-AgNPs against B16F10 (melanoma cell line) and A431 (squamous cell carcinoma cell line), was assessed with respective IC50 values of 59.5 and 96.61 μg/ml after 24 h of treatment. The presented green synthetic approach provides a novel and new door for environmental, industrial, and biomedical applications.

scholarly journals Single-Step Hydrothermal Synthesis of Biochar from H3PO4-Activated Lettuce Waste for Efficient Adsorption of Cd(II) in Aqueous Solution

Molecules ◽  
2022 ◽  
Vol 27 (1) ◽  
pp. 269
Author(s):  
Quyun Chen ◽  
Tian C. Zhang ◽  
Like Ouyang ◽  
Shaojun Yuan
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Low Temperature ◽  
Low Cost ◽  
Hydrothermal Carbonization ◽  
Single Step ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Solution Ph ◽  
Order Kinetic Model

Developing an ideal and cheap adsorbent for adsorbing heavy metals from aqueous solution has been urgently need. In this study, a novel, effective and low-cost method was developed to prepare the biochar from lettuce waste with H3PO4 as an acidic activation agent at a low-temperature (circa 200 °C) hydrothermal carbonization process. A batch adsorption experiment demonstrated that the biochar reaches the adsorption equilibrium within 30 min, and the optimal adsorption capacity of Cd(II) is 195.8 mg∙g−1 at solution pH 6.0, which is significantly improved from circa 20.5 mg∙g−1 of the original biochar without activator. The fitting results of the prepared biochar adsorption data conform to the pseudo-second-order kinetic model (PSO) and the Sips isotherm model, and the Cd(II) adsorption is a spontaneous and exothermic process. The hypothetical adsorption mechanism is mainly composed of ion exchange, electrostatic attraction, and surface complexation. This work offers a novel and low-temperature strategy to produce cheap and promising carbon-based adsorbents from organic vegetation wastes for removing heavy metals in aquatic environment efficiently.

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