Silver nanoparticles synthesized by UV-irradiation method using chloramine T as modifier: structure, formation mechanism and catalytic activity

Monodisperse silver nanoparticles supported layered double hydroxides (Ag NPs–LDH) were preferentially deposited on the outer surfaces of pillared LDH offered a high catalytic activity on alcohol oxidation.

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Green Synthesis of Silver Nanoparticles by Tannic Acid with Improved Catalytic Performance Towards the Reduction of Methylene Blue

NANO ◽

10.1142/s1793292018500030 ◽

2018 ◽

Vol 13 (01) ◽

pp. 1850003 ◽

Cited By ~ 5

Author(s):

Yueyue Hao ◽

Nan Zhang ◽

Jing Luo ◽

Xiaoya Liu

Keyword(s):

Methylene Blue ◽

Particle Size ◽

Silver Nanoparticles ◽

Catalytic Activity ◽

Tannic Acid ◽

Molar Ratio ◽

High Catalytic Activity ◽

Ag Nps ◽

Environmental Friendly ◽

Vis Spectroscopy

In this work, a facile, environmental-friendly and cost-effective method was developed to prepare silver nanoparticles (Ag NPs) in aqueous solution at room temperature. In our approach, tannic acid was employed as the reducing agent and stabilizer simultaneously, avoiding the usage of any toxic agent. The tannic acid derived silver nanoparticles (TA-Ag NPs) were fully characterized by UV-Vis spectroscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and thermogravimetric analyzer (TGA). The particle size of the synthesized TA-Ag NPs is tunable from 6.5[Formula: see text]nm to 19.2[Formula: see text]nm with narrow distribution by varying the molar ratio of TA to silver precursor. Efficient reduction of methylene blue (MB) catalyzed by TA-Ag NPs was observed, which was dependent upon the particle size of TA-Ag NPs or the TA concentration used for synthesis. By optimizing the TA concentration, complete reduction of MB was accomplished by TA-Ag NPs within 8[Formula: see text]min. The high catalytic activity of TA-Ag NPs was attributed to their nanosize and good dispersity as well as the electrostatic interaction between TA and MB which induces rapid enrichment of MB towards TA-Ag NPs, creating a locally concentrated layer of MB. Considering the facile and environmental-friendly preparation procedure and excellent catalytic activity, TA-Ag NPs are green, efficient and highly economical candidates for the catalysis of organic dyes and extendable of other reducible contaminants as well.

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A novel silver nanoparticle embedded mesoporous polyaniline (mPANI/Ag) nanocomposite as a recyclable catalyst in the acylation of amines and alcohols under solvent free conditions

RSC Advances ◽

10.1039/c4ra06182a ◽

2014 ◽

Vol 4 (80) ◽

pp. 42670-42681 ◽

Cited By ~ 18

Author(s):

Usha Mandi ◽

Anupam Singha Roy ◽

Biplab Banerjee ◽

Sk. Manirul Islam

Keyword(s):

Silver Nanoparticles ◽

Acetic Acid ◽

Catalytic Activity ◽

Silver Nanoparticle ◽

Solvent Free ◽

Organic Polymer ◽

High Catalytic Activity ◽

Ag Nps ◽

Solvent Free Conditions ◽

Highly Dispersed

Highly dispersed silver nanoparticles (Ag NPs) have been embedded into a mesoporous organic polymer (mPANI) and the material showed high catalytic activity in the acylation of amines and alcohols using acetic acid.

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Facile Interpretation of Catalytic Reaction between Organic Dye Pollutants and Silver Nanoparticles with Different Shapes

Journal of Nanomaterials ◽

10.1155/2019/3257892 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Ja Young Cheon ◽

Su Jun Kim ◽

Won Ho Park

Keyword(s):

Aqueous Solution ◽

Silver Nanoparticles ◽

Catalytic Activity ◽

Zeta Potential ◽

Catalytic Reaction ◽

Organic Dye ◽

Crystalline Form ◽

Ag Nps ◽

Dye Pollutants ◽

Different Shapes

In this study, various shapes of silver nanoparticles (Ag NPs) were synthesized via simple methods in aqueous solution. The size and shape of Ag NPs were measured by TEM image and DLS, and the crystalline form of Ag NPs was confirmed by XRD. From ATR-IR and zeta potential, the Ag NPs were found to be well surrounded by PVP. In addition, the catalytic activity of Ag NPs was evaluated using model dyes. Unlike the conventional catalysts, the model dyes with absorption peaks that did not overlap with the SPR peaks of the Ag NPs were selected to evaluate the catalytic activity without removal of the Ag NPs from the dye solution.

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Albumin/Ag Nanoparticles Synthesized by Using UV-Irradiation and Estimation of Their Antibacterial Activity

International Research Journal of Pure and Applied Chemistry ◽

10.9734/irjpac/2020/v21i130148 ◽

2020 ◽

pp. 36-45

Author(s):

Randa Fawzi Elsupikhe ◽

Tahani Soliman Alfazani ◽

Fawzia Muftah Al-Jazwia ◽

Hitham. Abo-Eisa ◽

Imperiyka Hammad ◽

...

Keyword(s):

Silver Nanoparticles ◽

Uv Irradiation ◽

Irradiation Time ◽

Average Diameter ◽

Bulk Sample ◽

Inhibitory Effect ◽

Optimum Conditions ◽

Ag Nps ◽

Albumin Nanoparticles ◽

Uv Lamp

Nano-scale (less than 100 nm) materials have received wide attention because of their rare properties that differ significantly from a bulk sample of the same material. In this research, a physical irradiation method by using UV lamp was established for preparation nanoparticles colloids of silver nanoparticles (Ag-NPs) with an eco-friendly stabilizer (Albumin). The preparation process was carried out using silver nitrate (AgNO3) in aqueous albumin at room temperature. The effects of UV-irradiation time and the concentrations of Ag+ and albumin on the particle size have been investigated. Moreover, the antibacterial effect of the Ag/Albumin nanoparticles has been tested. The results showed that, the UV–irradiation can influence the Ag-NPs size, which the of Nps decreases with the UV–irradiation increases. The morphological study demonstrated well-dispersed spherical Ag-NPs with an average diameter of about 29 nm at the optimum conditions. The antibacterial results exhibited a significant inhibitory effect for the Ag-NPs that synthesized in this work. The current fabrication method of the silver nanoparticles colloid could be extended to other metals such as Cu- Nps and may possibly find various additional applications.

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Comparative Photocatalytic Degradation of Organic Dyes Using Silver Nanoparticles Synthesized from Padina tetrastromatica

Current Nanoscience ◽

10.2174/1573413713666170825111306 ◽

2017 ◽

Vol 14 (1) ◽

pp. 71-75

Author(s):

Clara Gnana Selvi Barnabas ◽

Jayaraman Theerthagiri ◽

Amutha Santhanam

Keyword(s):

Methylene Blue ◽

Silver Nanoparticles ◽

Catalytic Activity ◽

Acridine Orange ◽

Metallic Nanoparticles ◽

Dye Degradation ◽

Time Interval ◽

Active Components ◽

Ag Nps ◽

Padina Tetrastromatica

Background: Seaweeds, being abundant sources of active components have attained much interest in recent times. The seaweeds are routinely used in life science research and are well known for their biological applications. In addition to that, the synthesis of metallic nanoparticles from these natural resources has its own attraction in drug delivery and was observed by using 2 mL of Ag NP colloids. Objective: In this study, the synthesis of silver nanoparticles (Ag NPs) using Padina tetrastromatica has been evaluated for their catalytic activity in the degradation of organic dye. Method: The catalytic activity of the biosynthesized Ag NP colloid was studied for the degradation of Methylene blue (MB) and Acridine orange (AO) dye. The degradation of methylene blue and acridine orange was observed at regular time interval by using UV-vis absorption spectra at 664 nm and 490 nm respectively. Results: The percentage of dye degradation increased in the presence of NaBH4. It was observed that 80.09% of MB dye reduction was observed by using 2 mL of Ag NP colloids. The acridine orange dye showed reduction of 83.06%. The rate constants for the reduction of Methylene blue (MB) and acridine orange (AO) dye using 2 mL Ag NPs colloids are 0.077 and 0.090 min-1, respectively.

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Synthesis of Silver Nanoparticles Using the UV-Irradiation Technique in an Antibacterial Application

Journal of Southwest Jiaotong University ◽

10.35741/issn.0258-2724.54.5.34 ◽

2019 ◽

Vol 54 (5) ◽

Cited By ~ 1

Author(s):

Ahmed Mahdi Rheima ◽

Mahdi A. Mohammed ◽

Shaimaa Hamed Jaber ◽

Shahad Abbas Hameed

Keyword(s):

Silver Nanoparticles ◽

Uv Irradiation ◽

Antimicrobial Properties ◽

Ion Concentration ◽

Gram Negative Bacteria ◽

Ag Nps ◽

Gram Positive ◽

Gram Negative ◽

Gram Positive Bacteria ◽

Irradiation Energy

The article describes a new way to the synthesis of silver nanoparticles based on UV-irradiation energy. Our technique allows for producing high quality and clean nanoparticles. Moreover, our photolysis approach allows us to synthesis silver nanoparticles (Ag NPs) with very low cost and short time. The nanostructures were characterized using X-ray diffraction, transmission electron spectroscopy and UV-visible spectrometer. Most of the Ag NPs are shown to be a hexagonal shape and some of them are a spherical shape. The average size of nanoparticles was calculated to be around 20.23 nm. The morphology, size, and ion concentration of the synthesized Ag NPs determine their absorbance and transmittance at the UV region of spectrum. Silver's antimicrobial properties are well known and due to their antimicrobial activity, silver nanoparticles become more important. Therefore, our synthesized Ag NPs were used against Staphylococcus aureus (Gram-positive bacteria) and E. coli (Gram-negative bacteria). The results show that the nanoparticles at a concentration of 0.2 mg/ml demonstrated a high activity of antimicrobials, resulting in a good inhibition for both grams positive and negative bacteria. However, the effect of Ag NPs on gram-positive bacteria is higher than gram-negative bacteria.

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Green Synthesis of Silver Nanoparticles with Exceptional Colloidal Stability and its Catalytic Activity Toward Nitrophenol Reduction

NANO ◽

10.1142/s1793292016500466 ◽

2016 ◽

Vol 11 (04) ◽

pp. 1650046 ◽

Cited By ~ 8

Author(s):

Manisha Sharma ◽

Amit Mishra ◽

Vinod Kumar ◽

Soumen Basu

Keyword(s):

Silver Nanoparticles ◽

Catalytic Activity ◽

Colloidal Stability ◽

Ag Nps ◽

Step Process ◽

Synthesis Parameters ◽

Salt Addition ◽

Nitrophenol Reduction ◽

Vis Spectroscopy ◽

One Step

Silver nanoparticles (Ag NPs) were synthesized by one-step process in the presence of kollicoat as capping, reducing and stabilizing mediator. The synthesized NPs were characterized by using FTIR, TEM, DLS, XRD, EDS and UV-Vis spectroscopy. The resulting Ag NPs had an incomparable colloidal stability against the salt addition and change of pH. The effect of different synthesis parameters and the catalytic property of the NPs were examined.

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