scholarly journals Facile phyto‐mediated synthesis of gold nanoparticles using Eupatorium odoratum leaf extract and its size‐dependent catalytic activity

2019 ◽  
Vol 14 (11) ◽  
pp. 1163-1168
Author(s):  
Alok Roy ◽  
Bidhan Mohanta
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Leaf Extract ◽  
Size Dependent

Size-Dependent Catalytic Activity of Gold Nanoparticles in DNA Hydrogels

2015 ◽  
Vol 358 (1) ◽  
pp. 106-111 ◽  
Author(s):  
Anatoly Zinchenko ◽  
Shota Taniguchi ◽  
Shizuaki Murata
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Size Dependent ◽  
Dna Hydrogels

scholarly journals Size controlled green synthesis of gold nanoparticles using Coffea arabica seed extract and their catalytic performance in 4-nitrophenol reduction

RSC Advances ◽  
2018 ◽  
Vol 8 (44) ◽  
pp. 24819-24826 ◽  
Author(s):  
N. K. R. Bogireddy ◽  
U. Pal ◽  
L. Martinez Gomez ◽  
V. Agarwal
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Green Synthesis ◽  
Coffea Arabica ◽  
Room Temperature ◽  
Catalytic Performance ◽  
Seed Extract ◽  
Size Dependent ◽  
Nitrophenol Reduction ◽  
Size Controlled

Size dependent catalytic activity of AuNPs synthesized at room temperature from Coffea arabica seed extract.

Size dependent catalytic activities of green synthesized gold nanoparticles and electro-catalytic oxidation of catechol on gold nanoparticles modified electrode

RSC Advances ◽  
2015 ◽  
Vol 5 (120) ◽  
pp. 99364-99377 ◽  
Author(s):  
Aftab Ahmad ◽  
Yun Wei ◽  
Fatima Syed ◽  
Muhammad Imran ◽  
Zia Ul Haq Khan ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Catalytic Oxidation ◽  
Modified Electrode ◽  
Catalytic Activities ◽  
Size Dependent ◽  
Electro Catalytic Oxidation

A green and facile method for the synthesis of gold nanoparticles with efficient catalytic activity.

Size-Dependent Catalytic Activity and Dynamics of Gold Nanoparticles at the Single-Molecule Level

2010 ◽  
Vol 132 (1) ◽  
pp. 138-146 ◽  
Author(s):  
Xiaochun Zhou ◽  
Weilin Xu ◽  
Guokun Liu ◽  
Debashis Panda ◽  
Peng Chen
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Single Molecule ◽  
Single Molecule Level ◽  
Size Dependent

scholarly journals Green Method for Synthesis of Gold Nanoparticles Using Polyscias scutellaria Leaf Extract under UV Light and Their Catalytic Activity to Reduce Methylene Blue

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Yoki Yulizar ◽  
Tresye Utari ◽  
Harits Atika Ariyanta ◽  
Digha Maulina
Keyword(s):  
Methylene Blue ◽  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Leaf Extract ◽  
Uv Light ◽  
Reduction Rate ◽  
Hydroxyl Groups ◽  
Face Centered Cubic ◽  
Pseudo First Order Reaction ◽  
Aqueous Fraction

The aqueous fraction of Polyscias scutellaria leaf extract (PSE) has been used as a reducing agent and stabilizer in the green synthesis of gold nanoparticles (AuNPs). UV-Vis spectrophotometry, particle size analyzer (PSA), Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy-selected area electron diffraction (TEM-SAED), and X-ray diffraction (XRD) were used to characterize AuNPs. The AuNPs have a size of 5–20 nm and have a face centered cubic (fcc) crystal structure and are stable for 21 days. Phenolic compounds, which are secondary metabolites of PSE, act as an active compound to reduce Au3+ ion to Au0, as well as stabilize the AuNPs through their surface interaction with carbonyl and hydroxyl groups of phenols. AuNPs exhibit excellent catalytic activity for the reduction of methylene blue with NaBH4. The reduction of methylene blue using AuNPs catalysts is a pseudo-first-order reaction with a reduction rate constant (kobs) of 0.0223 min−1.

scholarly journals Silver and Gold Nanoparticles from Limnophila rugosa Leaves: Biosynthesis, Characterization, and Catalytic Activity in Reduction of Nitrophenols

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Van Thuan Le ◽  
Ngoc Nhu Quynh Ngu ◽  
Tan Phat Chau ◽  
Thi Dung Nguyen ◽  
Van Toan Nguyen ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Metal Nanoparticles ◽  
Leaf Extract ◽  
Noble Metal Nanoparticles ◽  
Metallic Ions ◽  
Ftir Microscopy ◽  
X Ray ◽  
Silver And Gold Nanoparticles

This study describes a simple green method for the synthesis of Limnophila rugosa leaf-extract-capped silver and gold nanoparticles without using any expensive toxic reductant or stabilizer. The noble metal nanoparticles were characterized by Fourier transform infrared (FTIR) microscopy, powder X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray analysis (EDX), high-resolution transmission electron microscopy (HR-TEM), selected area electron diffraction (SAED), and dynamic light scattering (DLS) method. It has been found that the biosynthesized silver and gold nanoparticles are nearly spherical in shape with a mean particle size distribution of 87.5 nm and 122.8 nm, respectively. XRD and SAED patterns confirmed the crystalline nanostructure of the metal nanoparticles. FTIR spectra revealed the functional groups of biomolecules presented in the extract possibly responsible for reducing metallic ions and stabilizing formed nanoparticles. The biosynthesized metal nanoparticles have potential application in catalysis. Compared to previous reports, Limnophila rugosa leaf-extract-capped silver and gold nanoparticles exhibited a good catalytic activity in the reduction of several derivatives of nitrophenols including 1,4-dinitrobenzene, 2-nitrophenol, 3-nitrophenol, and 4-nitrophenol.

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