Hydrogen-assisted fabrication of spherical gold nanoparticles through sonochemical reduction of tetrachloride gold(III) ions in water

Sakai, Toshio; Enomoto, Hiroto; Sakai, Hideki; Abe, Masahiko

doi:10.1016/j.ultsonch.2013.12.010

Cited by 25 publications

(22 citation statements)

References 49 publications

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“…QTMC-AgNPs were prepared in a single-step reaction . In a typical reaction, an aqueous solution of silver nitrate (20 mL, 60 mM) was added to a dilute solution of QTMC (40 mL, 4.96 mM) in a Fischer porter with constant stirring for 30 min.…”

Section: Methodsmentioning

confidence: 99%

“…QTMC-AgNPs were prepared in a single-step reaction. 46 In a typical reaction, an aqueous solution of silver nitrate (20 mL, 60 mM) was added to a dilute solution of QTMC (40 mL, 4.96 mM) in a Fischer porter with constant stirring for 30 min. Thereafter, 3 bar of hydrogen gas was introduced to the reaction mixture, and the Fischer porter was allowed to warm to room temperature under vigorous stirring.…”

Section: Synthesis Of Qtmc-agnpsmentioning

confidence: 99%

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Compressed Hydrogen-Induced Synthesis of Quaternary Trimethyl Chitosan-Silver Nanoparticles with Dual Antibacterial and Antifungal Activities

Alli

Ejeromedoghene

Oladipo

et al. 2022

ACS Appl. Bio Mater.

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Quaternary Trimethyl Chitosan (QTMC) and QTMC-Silver Nanoparticles (QTMC-AgNPs) have been synthesized, characterized, and tested as antibacterial agents against Staphylococcus aureus, Escherichia coli, and two plant fungi (Sclerotium rolfsil and Fusarium oxysporum). The as-prepared water-soluble QTMC was in situ reacted with silver nitrate in the presence of clean compressed hydrogen gas (3 bar) as a reducing agent to produce QTMC-AgNPs. UV–vis, ATR-FTIR, HR-TEM/SEM, XPS, DLS, XRD, and TGA/DTG were employed to assess the optical response, morphology/size, surface chemistry, particle size distribution, crystal nature, and thermal stability of the synthesized QTMC-AgNPs, respectively. The as-prepared QTMC-AgNPs were quasi-spherical in shape with an average particle size of 12.5 nm, as determined by ImageJ software utilizing HR-TEM images and further validated by DLS analysis. The development of crystalline nanoparticles was confirmed by the presence of distinct and consistent lattice fringes with an approximate interplanar d-spacing of 2.04 nm in QTMC-AgNPs. The QTMC-AgNPs exhibited significant antibacterial activity with a clear zone of inhibition of 30 mm and 26 mm around the disks against E. coli and S. aureus, respectively. In addition, QTMC-AgNPs showed highly efficient antifungal activity with 100% and 76.67% growth inhibition against two plant pathogens, S. rolfsii and F. oxysporum, respectively, whereas QTMC revealed no impact. Overall, QTMC-AgNPs showed a promising therapeutic potential and,thus, can be considered for drug design rationale.

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Section: Methodsmentioning

confidence: 99%

Section: Synthesis Of Qtmc-agnpsmentioning

confidence: 99%

Compressed Hydrogen-Induced Synthesis of Quaternary Trimethyl Chitosan-Silver Nanoparticles with Dual Antibacterial and Antifungal Activities

Alli

Ejeromedoghene

Oladipo

et al. 2022

ACS Appl. Bio Mater.

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“…The spontaneous formation of the superstructure of homogeneous Au NPs was also confirmed, and the new nano-engineering technology field of synthesizing nano-structured materials and high-productivity in a short time was expanded by this method. Sakai Toshio et al [22] synthesized Au NPs through the sonochemical reduction method, with the help of hydrogen (H 2 ), the tetrachloride Au(III) ion is reduced in an aqueous solution of Au(III) tetrachloride tetrahydrate (HAuCl 4 .4H 2 O) ([AuCl 4 ] − ). There was no additional capping agent in the gas.…”

Section: Synthetic Methods Of Au Npsmentioning

confidence: 99%

Preparation, Functionalization, Modification, and Applications of Nanostructured Gold: A Critical Review

et al. 2021

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Gold nanoparticles (Au NPs) play a significant role in science and technology because of their unique size, shape, properties and broad range of potential applications. This review focuses on the various approaches employed for the synthesis, modification and functionalization of nanostructured Au. The potential catalytic applications and their enhancement upon modification of Au nanostructures have also been discussed in detail. The present analysis also offers brief summaries of the major Au nanomaterials synthetic procedures, such as hydrothermal, solvothermal, sol-gel, direct oxidation, chemical vapor deposition, sonochemical deposition, electrochemical deposition, microwave and laser pyrolysis. Among the various strategies used for improving the catalytic performance of nanostructured Au, the modification and functionalization of nanostructured Au produced better results. Therefore, various synthesis, modification and functionalization methods employed for better catalytic outcomes of nanostructured Au have been summarized in this review.

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“…On the other hand, the sonochemical reduction of metal ions to produce metal nanoparticles has been experimentally reported [ 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 ]. In most of the experiments, an organic material such as alcohol (

, where

or alkyl group), ascorbic acid, formic acid, etc., was added to the aqueous solution to produce a reducing agent by the chemical reaction with

radicals generated from cavitation bubbles as follows for alcohol [ 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 65 , 66 , 68 , 71 , 72 , 73 ].…”

Section: Introductionmentioning

confidence: 99%

The Reducing Agents in Sonochemical Reactions without Any Additives

Yasui

2023

Molecules

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It has been experimentally reported that not only oxidation reactions but also reduction reactions occur in aqueous solutions under ultrasound without any additives. According to the numerical simulations of chemical reactions inside an air or argon bubble in water without any additives under ultrasound, reducing agents produced from the bubbles are H, H2, HO2 (which becomes superoxide anion (O2−) in liquid water), NO, and HNO2 (which becomes NO2− in liquid water). In addition, H2O2 sometimes works as a reducing agent. As the reduction potentials of H and H2 (in strongly alkaline solutions for H2) are higher than those of RCHOH radicals, which are usually used to reduce metal ions, H and H2 generated from cavitation bubbles are expected to reduce metal ions to produce metal nanoparticles (in strongly alkaline solutions for H2 to work). It is possible that the superoxide anion (O2−) also plays some role in the sonochemical reduction of some solutes. In strongly alkaline solutions, hydrated electrons (e−aq) formed from H atoms in liquid water may play an important role in the sonochemical reduction of solutes because the reduction potential is extremely high. The influence of ultrasonic frequency on the amount of H atoms produced from a cavitation bubble is also discussed.

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Hydrogen-assisted fabrication of spherical gold nanoparticles through sonochemical reduction of tetrachloride gold(III) ions in water

Cited by 25 publications

References 49 publications

Compressed Hydrogen-Induced Synthesis of Quaternary Trimethyl Chitosan-Silver Nanoparticles with Dual Antibacterial and Antifungal Activities

Compressed Hydrogen-Induced Synthesis of Quaternary Trimethyl Chitosan-Silver Nanoparticles with Dual Antibacterial and Antifungal Activities

Preparation, Functionalization, Modification, and Applications of Nanostructured Gold: A Critical Review

The Reducing Agents in Sonochemical Reactions without Any Additives

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