Microwave-assisted synthesis of silver nanoparticles using sodium alginate and their antibacterial activity

Zhao, Xia; Xia, Yanzhi; Li, Qun; Ma, Xiaomin; Quan, Fengyu; Geng, Cunzhen; Han, Zhenyu

doi:10.1016/j.colsurfa.2013.12.008

Cited by 192 publications

(76 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…37,38 The further growth and aggregation process can be hindered by steric hindrance, chelation, and electrostatic effects from the polymer network. 39 In this way, a large number of small AgNPs were synthesized in situ on the CMC chains, and AgNPs were well dispersed throughout the CMC matrix with narrow size distribution.…”

Section: Results and Discussion Synthetic Mechanism Of Carboxymethyl mentioning

confidence: 99%

“…Zhao et al and other researchers have conducted theoretical studies on the correlation of UV-visible absorption with the size of metal spheres, and the general trend is that the SPR-absorption band shows a red shift with increasing particle size. 37,41,42 In the UV-visible spectra of CMC-Ag1, CMC-Ag2, and CMC-Ag3, a red shift of the SPR-absorption peak from 403 to 426 nm was related to the increasing particle size of AgNPs, suggesting that AgNPs were the smallest in CMC-Ag1. In addition, the corresponding SPR-absorption band of CMC-Ag1 was sharp and symmetrical, reflecting a very narrow distribution in the size of AgNPs.…”

mentioning

confidence: 99%

See 1 more Smart Citation

In situ green synthesis of antimicrobial carboxymethyl chitosan–nanosilver hybrids with controlled silver release

Huang¹,

Yu²,

Zhang³

et al. 2017

IJN

View full text Add to dashboard Cite

In order to fabricate antimicrobial carboxymethyl chitosan–nanosilver (CMC-Ag) hybrids with controlled silver release, this study demonstrated comparable formation via three synthetic protocols: 1) carboxymethyl chitosan (CMC) and glucose (adding glucose after AgNO 3 ), 2) CMC and glucose (adding glucose before AgNO 3 ), and 3) CMC only. Under principles of green chemistry, the synthesis was conducted in an aqueous medium exposed to microwave irradiation for 10 minutes with nontoxic chemicals. The structure and formation mechanisms of the three CMC-Ag hybrids were explored using X-ray diffraction, ultraviolet-visible spectroscopy, transmission electron microscopy, and Fourier-transform infrared analyses. Additionally, antimicrobial activity and in vitro silver release of the three synthesized hybrids were investigated in detail. The results revealed that a large number of stable, uniform, and small silver nanoparticles (AgNPs) were synthesized in situ on CMC chains via protocol 1. AgNPs were well dispersed with narrow size distribution in the range of 6–20 nm, with mean diameter only 12.22±2.57 nm. The addition of glucose resulted in greater AgNP synthesis. The order of addition of glucose and AgNO 3 significantly affected particle size and size distribution of AgNPs. Compared to CMC alone and commercially available AgNPs, the antimicrobial activities of three hybrids were significantly improved. Of the three hybrids, CMC-Ag1 synthesized via protocol 1 exhibited better antimicrobial activity than CMC-Ag2 and CMC-Ag3, and showed more effective inhibition of Staphylococcus aureus than Escherichia coli . Due to strong coordination and electrostatic interactions between CMC and silver and good steric protection provided by CMC, CMC-Ag1 displayed stable and continuous silver release and better performance in retaining silver for prolonged periods than CMC-Ag2 and CMC-Ag3.

show abstract

Section: Results and Discussion Synthetic Mechanism Of Carboxymethyl mentioning

confidence: 99%

mentioning

confidence: 99%

In situ green synthesis of antimicrobial carboxymethyl chitosan–nanosilver hybrids with controlled silver release

Huang¹,

Yu²,

Zhang³

et al. 2017

IJN

View full text Add to dashboard Cite

show abstract

“…Commercially, SNPs are synthesized by means of chemical methods using reducing agents such as sodium borohydride, hydrazine, N, N-dimethylformamide in the presence of stabilizers like triphenylphosphine, citrate, polyvinylpyrrolidone [3][4][5] . The prepared SNPs have a high surface area which leads to the adsorption of these potentially toxic chemicals.…”

Section: Introductionmentioning

confidence: 99%

Improved Yield of Green Synthesized Crystalline Silver Nanoparticles With Potential Antioxidant Activity

Sood¹,

Chopra²

2017

Int. Res. J. Pharm.

View full text Add to dashboard Cite

Biogenic nanoparticles are evolving as an important branch of nanomedicine which is cost effective and ecofriendly. The current study deals with the synthesis of silver nanoparticles using Ocimum sanctum leaf extract as reducing and capping agent. With increase concentration of AgNO3 (1-5mM), there was considerable increase in yield of silver nanoparticles The prepared nanoparticles were characterized using UV-visible spectroscopy, Fourier transform infrared spectroscopy (FT-IR), Transmission electron microscopy (TEM), X-ray diffraction (X-RD) and Dynamic light scattering (DLS).UV-visible spectroscopy showed maximum absorbance at 420 nm due to surface plasmon resonance of silver nanoparticles. FT-IR spectral analysis indicates the presence of water soluble phenolic compounds as reducing and stabilizing agents in the synthesis of silver nanoparticles. TEM analysis showed the presence of nearly spherical particles of size range 3-15 nm. Additionally, X-RD analysis revealed that the synthesized silver nanoparticles were anisotropic face-centered, cubic crystalline, having a size of 17.082 ± 5.83nm. DLS further support the formation of thermally stable silver nanoparticles, possessing negative surface charge potential. Thus, Ocimum sanctum leaf extract promotes rapid bioreduction of optimum concentration of silver nitrate resulting in a significant yield of silver nanoparticles which can be exploited commercially for its antioxidant activity.

show abstract

“…Biopolymers (cellulose and its derivatives, chitosan and its derivatives, alginate, dextran, and tree gums) are another family of natural sources used as reducing and stabilizing agents for metal and metal oxide nanoparticle synthesis [39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58]. Vitamin B 1 , Vitamin B 2 (riboflavin), Vitamin C (ascorbic acid), coffee and tea extracts, beet juice, and grape pomace are well-known natural reducing agents or antioxidants used for the synthesis of stable nanoparticles and are comprehensively reported [59][60][61][62][63][64][65].…”

Section: Natural and Renewable Sources Of Reducing Agents For The Synmentioning

confidence: 99%

Green Synthesis: Nanoparticles and Nanofibres Based on Tree Gums for Environmental Applications

Padil

Černík

2016

Ecological Chemistry and Engineering S

View full text Add to dashboard Cite

Abstract:The recent advances and potential applications of nanoparticles and nanofibres for energy, water, food, biotechnology, the environment, and medicine have immensely conversed. The present review describes a 'green' method for the synthesis and stabilization of nanoparticles and 'green electrospinning' both using tree gums (arabic, tragacanth, karaya and kondagogu). Furthermore, this review focuses on the impending applications of both gum stabilized nanoparticles and functionalized membranes in remediation of toxic metals, radioactive effluents, and the adsorptive removal of nanoparticulates from aqueous environments as well as from industrial effluents. Besides, the antibacterial properties of gum derivatives, gum stabilized nanoparticles, and functionalized electrospun nanofibrous membranes will also be highlighted. The functionalities of nanofibrous membranes that can be enhanced by various plasma treatments (oxygen and methane, respectively) will also be emphasized.

show abstract

Microwave-assisted synthesis of silver nanoparticles using sodium alginate and their antibacterial activity

Cited by 192 publications

References 52 publications

In situ green synthesis of antimicrobial carboxymethyl chitosan–nanosilver hybrids with controlled silver release

In situ green synthesis of antimicrobial carboxymethyl chitosan–nanosilver hybrids with controlled silver release

Improved Yield of Green Synthesized Crystalline Silver Nanoparticles With Potential Antioxidant Activity

Green Synthesis: Nanoparticles and Nanofibres Based on Tree Gums for Environmental Applications

Contact Info

Product

Resources

About

Microwave-assisted synthesis of silver nanoparticles using sodium alginate and their antibacterial activity

Cited by 192 publications

References 52 publications

In situ green synthesis of antimicrobial carboxymethyl chitosan&ndash;nanosilver hybrids with controlled silver release

In situ green synthesis of antimicrobial carboxymethyl chitosan&ndash;nanosilver hybrids with controlled silver release

Improved Yield of Green Synthesized Crystalline Silver Nanoparticles With Potential Antioxidant Activity

Green Synthesis: Nanoparticles and Nanofibres Based on Tree Gums for Environmental Applications

Contact Info

Product

Resources

About

In situ green synthesis of antimicrobial carboxymethyl chitosan–nanosilver hybrids with controlled silver release

In situ green synthesis of antimicrobial carboxymethyl chitosan–nanosilver hybrids with controlled silver release