Green Synthesis of Gold Nanoparticles Using Longan Polysaccharide and their Reduction of 4-nitrophenol and Biological Applications

NANO ◽  
2020 ◽  
Vol 15 (01) ◽  
pp. 2050002 ◽  
Author(s):  
Xiaoyu Zhang ◽  
Liyuan Fan ◽  
Yanshuai Cui ◽  
Tianming Cui ◽  
Shengfu Chen ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Green Synthesis ◽  
Metallic Nanoparticles ◽  
High Catalytic Activity ◽  
Synthetic Method ◽  
Biological Applications ◽  
Au Nps ◽  
Stabilizing Agents ◽  
Highly Dispersed ◽  
Negative Zeta Potential

The green synthesis of gold nanoparticles (Au NPs) for catalytic and biological applications has been drawing great attention. To compare with plant extracts, the polysaccharides may be good reducing and stabilizing agents. In this work, we describe the preparation of longan polysaccharide stabilized gold nanoparticles (Aun-LP NPs) by reduction of gold ions using a green synthetic method. The formation of gold nanoparticles (Au NPs) was confirmed by UV-Vis spectra. TEM showed that Au NPs had a small size (7.8–15.6[Formula: see text]nm) and were highly dispersed without any aggregation. XPS confirmed that the surface elemental composition of Aun-LP NPs was C, O, and Au. DLS demonstrated that Aun-LP NPs had good stability and negative zeta potential. In addition, Aun-LP NPs had high catalytic activity for the reduction of 4-nitrophenol. More importantly, Aun-LP NPs had ignorable cytotoxicity towards HeLa cells and showed good antioxidant activity. Taken together, the results indicated that longan polysaccharide can be used as reducing agents and stabilizers for the preparation of metallic nanoparticles, and the product had wide applications.

scholarly journals Biosynthesis and Potential Applications of Silver and Gold Nanoparticles and Their Chitosan-Based Nanocomposites in Nanomedicine

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Haliza Katas ◽  
Noor Zianah Moden ◽  
Chei Sin Lim ◽  
Terence Celesistinus ◽  
Jie Yee Chan ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Metallic Nanoparticles ◽  
Cost Effective ◽  
One Pot ◽  
Silver And Gold Nanoparticles ◽  
Stabilizing Agents ◽  
Cost Effective Method ◽  
Multistep Process ◽  
Potential Applications ◽  
Biological Sources

Biosynthesized or biogenic metallic nanoparticles, particularly silver and gold nanoparticles (AgNPs and AuNPs, respectively), have been increasingly used because of their advantages, including high stability and loading capacity; moreover, these nanoparticles are synthesized using a green and cost-effective method. Previous studies have investigated reducing and/or stabilizing agents from various biological sources, including plants, microorganisms, and marine-derived products, using either a one-pot or a multistep process at different conditions. In addition, extensive studies have been performed to determine the biological or pharmacological effects of these nanoparticles, such as antimicrobial, antitumor, anti-inflammatory, and antioxidant effects. In the recent years, chitosan, a natural cationic polysaccharide, has been increasingly investigated as a reducing and/or stabilizing agent in the synthesis of biogenic metallic nanoparticles with potential applications in nanomedicine. Here, we have reviewed the mechanism of biosynthesis and potential applications of AgNPs and AuNPs and their chitosan-mediated nanocomposites in nanomedicine.

scholarly journals Green Synthesis and Characterization of Gold Nanoparticles Using Lignin Nanoparticles

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1869
Author(s):  
Baobin Wang ◽  
Guihua Yang ◽  
Jiachuan Chen ◽  
Guigan Fang
Keyword(s):  
Gold Nanoparticles ◽  
Green Synthesis ◽  
Photoelectron Spectroscopy ◽  
Room Temperature ◽  
Reduction Process ◽  
Functional Materials ◽  
Hydroxyl Group ◽  
Hydroxyl Groups ◽  
Rapid Preparation ◽  
Au Nps

With the development of nanotechnology, gold nanoparticles (Au NPs) have attracted enormous attention due to their special properties. The green synthesis of Au NPs from lignin would inspire the utilization of lignin and its related functional materials. In this study, a rapid preparation process of Au NPs was investigated by utilizing lignin nanoparticles (LNPs) under room temperature without chemical addition. The LNPs acted as a reducing agent, stabilizing agent, and template for the preparation of LNPs@AuNPs. The obtained LNPs@AuNPs were characterized by UV-Vis spectrum, Transmission Electron Microscope (TEM), and X-ray photoelectron spectroscopy (XPS). The possible mechanism was illustrated by Fourier Transform Infrared Spectroscopy (FT-IR), 31P, XPS, and UV analyses. The abundant hydroxyl groups (24.96 mmol/g) favored the preparation of Au NPs. Au NPs diameters of 10–30 nm were well dispersed in the LNPs. The optimal reaction conditions were a ratio of 10 mg of LNPs to 0.05 mmol HAuCl4, room temperature, and a reaction time of 30 min. The LNPs@AuNPs exhibited excellent stability in the suspension for more than seven days. The reduction process could be related to the disruption of side chains of lignin, hydroxyl group oxidation, and hydroquinones and quinones from the comproportionation reaction. The LNPs@AuNPs would open a door for the design of Au NP/lignin-derived novel functional materials.

Preparation of Au nanoparticles by Anthemis xylopoda flowers aqueous extract and their application for alkyne/aldehyde/amine A3-type coupling reactions

RSC Advances ◽  
2015 ◽  
Vol 5 (57) ◽  
pp. 46240-46246 ◽  
Author(s):  
Mahmoud Nasrollahzadeh ◽  
S. Mohammad Sajadi
Keyword(s):  
Gold Nanoparticles ◽  
Green Synthesis ◽  
Aqueous Extract ◽  
Au Nanoparticles ◽  
Coupling Reactions ◽  
Au Nps ◽  
Type Coupling

This paper reports on the green synthesis of gold nanoparticles (Au NPs) by Anthemis xylopoda flowers aqueous extract without the addition of surfactant agents and their application as stable catalysts for the synthesis of propargylamines.

Green synthesis and characterization of gold nanoparticles embedded into magnetic carbon nanocages and their highly efficient degradation of methylene blue

RSC Advances ◽  
2016 ◽  
Vol 6 (34) ◽  
pp. 28774-28780 ◽  
Author(s):  
Wei Zuo ◽  
Gaosong Chen ◽  
Fengjuan Chen ◽  
Siliang Li ◽  
Baodui Wang
Keyword(s):  
Methylene Blue ◽  
Gold Nanoparticles ◽  
Green Synthesis ◽  
Synthesis And Characterization ◽  
Au Nps ◽  
Selective Degradation ◽  
Highly Efficient ◽  
Magnetic Carbon

We reported the Au NPs/MCNSs nanohybrids as the catalysts for the highly efficient and selective degradation of methylene blue.

Highly stable Au nanoparticles with double hydrophilic block copolymer templates: correlation between structure and stability

2017 ◽  
Vol 8 (31) ◽  
pp. 4528-4537 ◽  
Author(s):  
Eunyong Seo ◽  
Sang-Ho Lee ◽  
Sangho Lee ◽  
Soo-Hyung Choi ◽  
Craig J. Hawker ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Block Copolymer ◽  
Acrylic Acid ◽  
Colloidal Stability ◽  
Au Nanoparticles ◽  
Synthetic Method ◽  
Au Nps ◽  
Double Hydrophilic Block Copolymers ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

We herein report a facile synthetic method for preparing gold nanoparticles (Au NPs) with superior colloidal stability using a series of double hydrophilic block copolymers (DHBC), poly(ethylene oxide)-block-poly(acrylic acid) (PEO-b-PAA), as a template (Au@DHBC NPs).

One-Step Synthesis of Stable Gold Nanoparticles on Eco-friendly Ionic Liquid

2012 ◽  
Vol 1386 ◽  
Author(s):  
P Anantha ◽  
Xiu Wang ◽  
C.C. Wong
Keyword(s):  
Gold Nanoparticles ◽  
Ionic Liquid ◽  
Metallic Nanoparticles ◽  
Thermal Evaporation ◽  
Processing Technique ◽  
Nanoparticle Dispersion ◽  
Thermal Evaporation Method ◽  
Stabilizing Agents ◽  
Transmission Electron ◽  
The Difference

ABSTRACTMetallic nanoparticles are often obtained by chemical decomposition or reactive techniques involving the extensive usage of harmful reducing or stabilizing agents. A facile green synthesis technique resulting in readily exploitable nanoparticle dispersion in ionic liquid without the use of any additional agents is reported here. 1-Propyl- 3- Methyl Imidazolium Iodide (PMIM(I)) is a non-volatile, thermally stable and non-toxic ionic liquid. This eco-friendly liquid is used as the substrate for thermal evaporation of gold to obtain stable gold nanoparticles. On being examined by Transmission Electron Microscopy the high monodispersity in their sizes was revealed. The byproduct free, ‘clean’ processing technique helps in obtaining un-contaminated particles. The thermal evaporation method used (for the generation of metallic vapor) plays a significant role in the difference in kinetics of the formation and growth of nanoparticles, unlike the widely reported sputtering technique for vapor generation. The formed particles are deposited only on the top surface of the liquid. Thus the nucleation and growth of the particles can be considered to have occurred by surface diffusion process only. A deeper investigation into the formation kinetics has the potential application for synthesizing other nanomaterials via this environmental friendly approach.

scholarly journals M13 Phages Uptake of Gold Nanoparticles for Radio- and Thermal-Therapy and Contrast Imaging Improvement

2021 ◽  
Vol 11 (23) ◽  
pp. 11391
Author(s):  
Lorenzo Torrisi ◽  
Letteria Silipigni ◽  
Lubomir Kovacik ◽  
Vasily Lavrentiev ◽  
Mariapompea Cutroneo ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Laser Ablation ◽  
Metallic Nanoparticles ◽  
Average Diameter ◽  
Thermal Therapy ◽  
Low Doses ◽  
Spherical Nanoparticles ◽  
Contrast Imaging ◽  
Au Nps ◽  
Tumoral Cells

The presented work deals with the uptake of gold nanoparticles (Au NPs) by M13 phages in solutions. In particular, the Au NPs uptake modalities and their localization in the filamentous phages are evaluated and measured. Gold spherical nanoparticles (with an average diameter of the order of 10 nm) are obtained by laser ablation in water with a sodium citrated surfactant. The interest of such application comes from the possibility to employ living biological structures to transport heavy metallic nanoparticles inside cells of tumoral tissues. Indeed, phages have the capability to introduce Au NPs in the proximity to the cell nucleus, increasing the efficiency of DNA destruction in the tumoral cells by employing low doses of ionizing radiation during radiotherapy and hyperthermia treatments. Several analyses and microscopy characterizations of the prepared phages samples embedding gold nanoparticles are presented, demonstrating that the presence of Au NPs increases the phages imaging contrast.

Synthesis of a hierarchical SiO2/Au/CeO2 rod-like nanostructure for high catalytic activity and recyclability

RSC Advances ◽  
2015 ◽  
Vol 5 (44) ◽  
pp. 34549-34556 ◽  
Author(s):  
Yuanmei Xu ◽  
Yiwei Zhang ◽  
Yuming Zhou ◽  
Zewu Zhang ◽  
Sanming Xiang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
High Catalytic Activity ◽  
Au Nps

Uniform hierarchical SiO2/Au/CeO2 rod-like nanostructures were successfully fabricated by combining three individual synthesis steps, in which sub-5 nm gold nanoparticles (Au NPs) were coated with a mesoporous CeO2 shell.

scholarly journals Green Synthesis of Gold Nanoparticles Using Upland Cress and Their Biochemical Characterization and Assessment

Nanomaterials ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 28
Author(s):  
Noah Hutchinson ◽  
Yuelin Wu ◽  
Yale Wang ◽  
Muskan Kanungo ◽  
Anna DeBruine ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Zeta Potential ◽  
Green Synthesis ◽  
Synthesis Process ◽  
Gold Content ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
Au Nps ◽  
X Ray ◽  
Vis Spectroscopy

This research focuses on the plant-mediated green synthesis process to produce gold nanoparticles (Au NPs) using upland cress (Barbarea verna), as various biomolecules within the upland cress act as both reducing and capping agents. The synthesized gold nanoparticles were thoroughly characterized using UV-vis spectroscopy, surface charge (zeta potential) analysis, scanning electron microscopy-energy-dispersive X-ray spectroscopy (SEM-EDX), atomic force microscopy (AFM), attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), and X-ray diffraction (XRD). The results indicated the synthesized Au NPs are spherical and well-dispersed with an average diameter ~11 nm and a characteristic absorbance peak at ~529 nm. EDX results showed an 11.13% gold content. Colloidal Au NP stability was confirmed with a zeta potential (ζ) value of −36.8 mV. X-ray diffraction analysis verified the production of crystalline face-centered cubic gold. Moreover, the antimicrobial activity of the Au NPs was evaluated using Gram-negative Escherichiacoli and Gram-positive Bacillus megaterium. Results demonstrated concentration-dependent antimicrobial properties. Lastly, applications of the Au NPs in catalysis and biomedicine were evaluated. The catalytic activity of Au NPs was demonstrated through the conversion of 4-nitrophenol to 4-aminophenol which followed first-order kinetics. Cellular uptake and cytotoxicity were evaluated using both BMSCs (stem) and HeLa (cancer) cells and the results were cell type dependent. The synthesized Au NPs show great potential for various applications such as catalysis, pharmaceutics, and biomedicine.

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