scholarly journals One Pot Green Synthesized Silver Nanoparticles as a Selective Sensor for Hg2+ Ions.

2021 ◽  
Author(s):  
Nasir Mahmood Abbasi ◽  
Najma Nasim ◽  
Sana Khan ◽  
Farid Ahmad ◽  
Usman Hameed
Keyword(s):  
Silver Nanoparticles ◽  
Metal Ions ◽  
Tap Water ◽  
The Other ◽  
Ag Nps ◽  
One Pot ◽  
Screening Process ◽  
Absorption Intensity ◽  
Green Approach ◽  
High Concentrations

Abstract The domains of science and technology, especially environmental protection, have brought a lot of change in nanotechnology. In the modern period, the growth of animals and plants with enough quantities is fundamentally obligatory by heavy metal ions (M+), such as Cr3+, Zn2+, Ní2+, Cu2+ and Hg2+.. However, because of their presence in both human and animal food webs, these metal ions are toxic to living things at relatively high concentrations. The ecologically friendly green approach was utilized to synthesis starch functionalized silver nanoparticles (St-Ag NPs) using water as a solvent, starch as a stabilizing agent, and glucose as a reducing agent. KOH has been used as an activator for glucose activation. The influence of diverse solutions such as AgNO3, starch, glucose, and KOH on the production of St-AgNPs was investigated. To see how these substances affect the production of St-Ag NPs, different controlled reactions were carried out in the absence of starch, glucose, and KOH. Starch, glucose, and KOH are discovered to play important roles in the synthesis of AgNPs. UV-Vis absorption spectroscopy, Fourier transform infrared (FT-IR), X-ray diffraction (XRD), and scanning electron microscope (SEM) were used for the characterization of St-Ag NPs. These starch functionalized AgNPs were used for the detection of heavy metals at 25℃. It is found during the screening process only Hg2+ showed clear changes in the color and absorption intensity of AgNPs which may be due to redox reaction that can occur between Ag0 and Hg2+. On the other hand, the color and absorption intensity of nanoparticles remain unchanged in the presence of all the other tested metals ion. The presence of other metal ions was also tested in the system. The proposed method has strong selectivity and sensitivity to Hg2+ ions. Using UV-visible spectrophotometry, the method produced had a detection limit of 1ppm. The proposed method for detecting Hg2+ in tap water samples was found to be successful..

Bottom-up molecular-assembly of Ru(ii)polypyridyl complex-based hybrid nanostructures decorated with silver nanoparticles: effect of Ag nitrate concentration

RSC Advances ◽  
2014 ◽  
Vol 4 (38) ◽  
pp. 20024-20030 ◽  
Author(s):  
Narayanasamy Vilvamani ◽  
Tarkeshwar Gupta ◽  
Rinkoo Devi Gupta ◽  
Satish Kumar Awasthi
Keyword(s):  
Silver Nanoparticles ◽  
Nitrate Concentration ◽  
Molecular Assembly ◽  
Hybrid Nanostructures ◽  
Ag Nps ◽  
One Pot ◽  
Bottom Up ◽  
Polypyridyl Complex ◽  
One Pot Synthesis

Facile and templateless one-pot synthesis of Ru(ii)polypyridyl complex-based hybrid nanostructures decorated with silver nanoparticles (Ag NPs) with variable morphologies.

Facile one-pot synthesis of highly monodisperse nickel microspheres with raised nickel dots and their adsorption performance for heavy metal ions

2016 ◽  
Vol 45 (23) ◽  
pp. 9704-9711 ◽  
Author(s):  
Yue Teng ◽  
Le Xin Song ◽  
Wei Liu ◽  
Li Zhao ◽  
Juan Xia ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Solvothermal Synthesis ◽  
Heavy Metal Ions ◽  
One Pot ◽  
Adsorption Performance ◽  
One Pot Synthesis ◽  
High Concentrations

Monodispersed Ni microspheres with surfaces uniformly covered by Ni dots were constructed through a facile solvothermal synthesis, showing an improved ability to remove Cd2+ ions even at high concentrations in water.

scholarly journals Comparison of the Effect Aqueous Extract and Nano-Sidr Synthetic of Leaves Ziziphus Spina-christi with Silver Nanoparticles the on Biofilm of Local Isolates of Staphylococcus. Spp

2021 ◽  
pp. 178-190
Author(s):  
Furqan Fadhil Najm ◽  
Siham Jasim Alkaabi ◽  
Quraish Abbas Kadhum
Keyword(s):  
Silver Nanoparticles ◽  
The Other ◽  
Diffusion Method ◽  
Biochemical Tests ◽  
Ag Nps ◽  
Staphylococcus Lugdunensis ◽  
Mannitol Salt Agar ◽  
Staphylococcus Warneri ◽  
Vitek 2 ◽  
Staphylococcus Spp

Aims: This study aims to investigate the inhibitory susceptibility of extract Sidr leaf (Ziziphus spina-christi) aqueous, silver nanoparticles Ag NPs and Sidr nanoparticle "Nano-sidr" (Ziziphus spina-christi) against local isolates of Staphylococcus.SPP, and their inhibition effect on biofilm formation. Study Design: Initially diagnosed by The use of Mannitol salt agar medium, then 26 isolates were selected from them depending on the resistance to methicilln and Vancomycin that were conducted. Place and Duration of Study: The samples were collected from AL-Najaf AL-Ashraf and Baghdad hospitals. Methodology: These isolates were subjected to a VITEK-2 compact system "ID, AST", to ascertain the genus and type of Staphylococcus bacteria., morphological and biochemical tests were conducted on them to confirm them. Results: The result of the diagnosis showed 10 isolates belonging to Staphylococcus aureus, and a number of them were resistant to as MRSA-VRSA, and 7 were Staphylococcus haemolyticus and they were all resistant and known as MRSA-VRSA, and two isolates of Staphylococcus sciuri bacteria, one of them was resistant to VRSA and the other to MRSA-VRSA , two isolates of Staphylococcus warneri were both resistant to MRSA, two isolates of Staphylococcus lugdunensis were resistant to antibiotics, one of them was VRSA and the other was MRSA-VRSA, and one isolate of Staphylococcus lentus was also resistant to antibiotics MRSA-VRSA, and one isolate of Staphylococcus warneri was resistant to MRSA-VRSA, and one isolate of Staphylococcus lugdunensis was resistant to antibiotics. Conclusion: Isolation of Staphylococcus vitulinus. 11 different isolates were selected from them according to their resistance to antibiotics, and after selecting the most efficient one by examining the inhibitory activity by diffusion method. The results showed the ability of both types of nanoparticles. Plant extracts prevent the formation of biofilms

scholarly journals One-Pot Fabrication and Characterization of Silver Nanoparticles Using Solanum lycopersicum: An Eco-Friendly and Potent Control Tool against Rose Aphid, Macrosiphum rosae

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Atanu Bhattacharyya ◽  
Ram Prasad ◽  
Abdul A. Buhroo ◽  
Prabha Duraisamy ◽  
Insha Yousuf ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Solanum Lycopersicum ◽  
Mortality Data ◽  
Kashmir Valley ◽  
Ag Nps ◽  
One Pot ◽  
Worldwide Distribution ◽  
Vis Spectroscopy ◽  
Macrosiphum Rosae

The espousal of nanotechnology is a current come-up of the present revolution. As we know that the rose aphid, Macrosiphum rosae (Hemiptera: Aphididae), is a key pest on rose plant in Kashmir Valley, India, it exhibits a worldwide distribution. In the present study, we have synthesized biologically silver nanoparticles (Ag NPs) from Solanum lycopersicum and characterized them by UV-vis spectroscopy, TEM, and X-RD analysis. The experiment was performed by leaf dip method. Insecticidal solutions of different Ag NPs concentrations, namely, 200, 300, 400, and 500 ppm, were tested on M. rosae. For assessment purposes, leaves were treated with distilled water (used as control). Aphid mortality data revealed that the Ag NPs were effective at 500 ppm concentration. As the concentration and day’s treatment increased, the aphid mortality rate also increased. There were statistically significant differences in M. rosae mortality between concentrations by LSD at 5%. In wrapping up, the use of Ag NPs in pest control processes will be the most novel eco-friendly approach in the Kashmir Valley, India, in future.

scholarly journals Preparation of silver nanoparticles with controlled size of particles

2019 ◽  
Vol 17 (1) ◽  
pp. 65-72
Author(s):  
К. Askaruly ◽  
S. Azat ◽  
A. R. Kerimkulova
Keyword(s):  
Silver Nanoparticles ◽  
Synthesis Method ◽  
Ag Nps ◽  
One Pot ◽  
One Pot Synthesis ◽  
Size Of Particles

In the last decades, interest has significantly increased to to studying of nanodimensional particles, in particular, nanoparticles of various metals. In the first stage it is connected with the fact that nanoworld objects significantly differthe properties from macroobjects. Besides, there is a possibility of application of nanoparticles for receiving medical and biological medicines. In this study, we synthesized silver nanoparticles with various size and UV-VIS spectrophotometry,“Master Sizer” and “Zeta Sizer” tools characterized the nano species; we have conducted a simple and rapid one-pot synthesis method to generate nine colloids of Ag-NPs in different concentrations of TSCD and FSH. In this one-pot synthesismethod, we utilized citrate as capping groups to stabilize the NPs and FeSO4•7H2O to control the formation of shapes of NPs.

scholarly journals Increase the rate of plasma-assisted synthesis of silver nanoparticles through additives

2021 ◽  
Vol 237 ◽  
pp. 01028
Author(s):  
Limin Zhai ◽  
Ye Lu ◽  
Dong Chen ◽  
Xinyi Chen ◽  
Linsheng Liu ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Growth Process ◽  
Resonance Absorption ◽  
Localized Surface Plasmon ◽  
Ag Nps ◽  
Absorption Intensity ◽  
Effect Of Additives ◽  
Reaction Solution

The plasma-assisted method was used to synthesize silver nanoparticles, and the growth process of silver nanoparticles (Ag-NPs) was monitored in real time by localized surface plasmon resonance (LSPR) absorption spectroscopy. The effect of additives on the synthesis of Ag-NPs was verified. It is found that the addition of isopropanol and glucose can increase the plasmon resonance absorption intensity of the reaction solution, and promote the synthesis of Ag-NPs. In the plasma-assisted method, the additives can effectively improve the synthesis efficiency of Ag-NPs, which has great inspiration for the synthesis of other metal nanoparticles.

scholarly journals Silver Nanoparticles Catalyzed Synthesis and Antimicrobial Activity of 2-Amino-4H-Chromenes

2021 ◽  
Vol 10 (4) ◽  
pp. 2715-2721
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Antifungal Activity ◽  
Aqueous Medium ◽  
Alternaria Alternata ◽  
Room Temperature ◽  
One Pot ◽  
Environment Friendly ◽  
Green Approach ◽  
Operational Simplicity

A simple and one-pot protocol has been developed to synthesize bioactive 2-amino-4H-chromenes by using silver nanoparticles (AgNp) as a catalyst at room temperature in an aqueous medium. This method provides operational simplicity and an environment-friendly green approach. All the synthesized compounds were evaluated for antifungal activity against Alternaria alternata.

Characterisation of bioaccumulation dynamics of three differently coated silver nanoparticles and aqueous silver in a simple freshwater food chain

2015 ◽  
Vol 12 (6) ◽  
pp. 662 ◽  
Author(s):  
Judit Kalman ◽  
Kai B. Paul ◽  
Farhan R. Khan ◽  
Vicki Stone ◽  
Teresa F. Fernandes
Keyword(s):  
Silver Nanoparticles ◽  
Polyethylene Glycol ◽  
Food Chain ◽  
Rate Constants ◽  
Dietary Exposure ◽  
Polyvinyl Pyrrolidone ◽  
Ag Nps ◽  
Transmission Electron ◽  
High Concentrations ◽  
Biodynamic Model

Environmental context Nanoparticles may be passed from primary producers to predators higher up the food chain, but little is currently known about this transfer. We studied the accumulation dynamics of silver nanoparticles by algae, and then from algae to zooplankton. Using the biodynamic approach, we reconstructed the accumulation process to show that diet is the primary route of uptake for silver nanoparticles. Abstract This study investigated the bioaccumulation dynamics of silver nanoparticles (Ag NPs) with different coatings (polyvinyl pyrrolidone, polyethylene glycol and citrate), in comparison with aqueous Ag (added as AgNO3), in a simplified freshwater food chain comprising the green alga Chlorella vulgaris and the crustacean Daphnia magna. Algal uptake rate constants (ku) and membrane transport characteristics (binding site density, transporter affinity and strength of binding) were determined after exposing algae to a range of either aqueous Ag or Ag NP concentrations. In general, higher ku values were related to higher toxicity in the algae. Transmission electron microscopy images were used to investigate the internalisation of Ag NPs in algal cells following exposure to low concentrations for 72h (mimicking inhibition tests) or high concentrations for 4h (mimicking preparation for daphnia dietary exposure). Ag NPs were only visualised in algal cells exposed to high Ag NP concentrations. To establish D. magna biodynamic model constants, organisms were fed Ag-contaminated algae and depurated for 96h. Assimilation efficiencies ranged from 10 to 25% and the elimination of accumulated Ag followed a two-compartmental model, indicating lower loss rate constants for polyvinyl pyrrolidone-, and polyethylene glycol-coated Ag NPs. Biodynamic model results revealed that in most cases, food is the dominant pathway of Ag uptake in D. magna. Despite the predicted low steady-state body burdens in D. magna, dietary uptake of Ag was possible from aqueous and particulate forms of Ag.

scholarly journals Direct As(V) Determination Using Screen-Printed Electrodes Modified with Silver Nanoparticles

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1280
Author(s):  
Karina Torres-Rivero ◽  
Clara Pérez-Ràfols ◽  
Julio Bastos-Arrieta ◽  
Antonio Florido ◽  
Vicenç Martí ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Inductively Coupled Plasma ◽  
Carbon Nanofiber ◽  
Tap Water ◽  
Anodic Stripping Voltammetry ◽  
Direct Determination ◽  
Ag Nps ◽  
Screen Printed Electrodes ◽  
Screen Printed

Carbon-nanofiber-based screen-printed electrodes modified with silver nanoparticles (Ag-NP-SPCNFEs) were tested in a pioneering manner for the direct determination of As(V) at low μg L−1 levels by means of differential pulse anodic stripping voltammetry. Screen-printed electrodes were modified with two different types of Ag-NPs, nanoseeds (NS), and nanoprisms (NPr) and characterized both microscopically and electrochemically. Furthermore, after optimizing the direct voltammetric determination of As(V), the analytical performance of considered sensors was compared for the direct determination of As(V). These results suggest that Ag-NS offer a better analytical response compared to Ag-NPr, with a detection and quantification limit of 0.6 and 1.9 µg L−1, respectively. The proposed methodology was validated using a spiked tap water sample with a very high reproducibility and good agreement with inductively coupled plasma-mass spectrometry (ICP-MS) measurements.

Gels and threads: mussel-inspired one-pot route to advanced responsive materials

2014 ◽  
Vol 50 (87) ◽  
pp. 13278-13281 ◽  
Author(s):  
M. Krogsgaard ◽  
A. Andersen ◽  
H. Birkedal
Keyword(s):  
Metal Ions ◽  
Tannic Acid ◽  
Low Ph ◽  
Self Healing ◽  
Trivalent Metal ◽  
One Pot ◽  
Responsive Materials ◽  
Trivalent Metal Ions ◽  
High Concentrations

Self-healing hydrogels are obtained in a one-pot reaction between tannic acid, trivalent metal ions and polyallylamine. At high concentrations, meter-long threads could be drawn from low pH solutions.

Sign in / Sign up

Export Citation Format

Share Document