Biofabricated silver nanoparticles as green catalyst in the degradation of different textile dyes

Bogireddy, Naveen Kumar Reddy; Kumar, Hoskote Anand Kiran; Mandal, Badal Kumar

doi:10.1016/j.jece.2015.11.004

Cited by 107 publications

(48 citation statements)

References 33 publications

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“…Different concentrations of NaBH 4 and catalyst are tested on the Congo red dye. The catalytic degradation of organic dyes was observed by measuring UV-Visible spectra at regular time intervals [21,22].…”

Section: Determination Of Catalytic Activitymentioning

confidence: 99%

Biosynthesis of Copper Oxide nanoparticles from Drypetes sepiaria Leaf extract and their catalytic activity to dye degradation

Narasaiah

Mandal

Sarada

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Section: Determination Of Catalytic Activitymentioning

confidence: 99%

Biosynthesis of Copper Oxide nanoparticles from Drypetes sepiaria Leaf extract and their catalytic activity to dye degradation

Narasaiah

Mandal

Sarada

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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“…We suppose that in AgNPs production the algae may play role of both stabilizer and reductant. Despite various studies on plant mediated synthesis of AgNPs have been conducted, there is no clear explanation regarding the chemistry involved in the multifunctional nature of extracts during the synthesis of stable NPs [26]. It is very likely that stabilization of AgNPs may be caused by natural polymers [27,28].…”

Section: -3mentioning

confidence: 99%

Limitations and possibilities of green synthesis and long-term stability of colloidal Ag nanoparticles

Velgosová

Mražíková

2017

AIP Conference Proceedings

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Abstract. In this paper the influence of algae life cycle and the solutions pH on the green synthesis of colloidal Ag nanoparticles (AgNPs) as well as effect of different storage conditions on AgNPs long-term stability was investigated. Silver nanoparticles were biologically synthesized using extracts of Parachlorella kessleri algae cultivated 1, 2, 3 and 4 weeks. The formation of AgNPs was monitored using a UV-vis spectrophotometer and verified by TEM observation. The results confirmed formation of polyhedron and/or near polyhedron AgNPs, ranging between 5 and 60 nm in diameter. The age of algae influenced the synthesis rate and an amount of AgNPs in solution. The best results were obtained using tree weeks old algae. UV-vis analysis and TEM observation also revealed that the size and the stability of AgNPs depend on the pH of solution. AgNPs formed in solutions of higher pH (8 and 10) are polyhedron, fine, with narrow size interval and stabile. Nanoparticles formed in solutions of low pH (2, 4 and 6) started to lose their stability on 10 th day of experiment, and the particle size interval was wide. The long-term stability of AgNPs can be influenced by light and temperature conditions. The most significant stability loss was observed at day light and room temperature (21°C). After 200-days significant amount of agglomerated particles settled on the bottom of the Erlenmeyer flask. AgNPs stored at dark and room temperature showed better long-term stability, weak particles agglomeration was observed. AgNPs stored at dark and at temperature 5°C showed the best long-term stability. Such AgNPs remained spherical, fine (5-20 nm), with narrow size interval and stable (no agglomeration) even after more than six months.

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“…4-nitrophenol, methylene blue, methyl orange and different organic dyes were catalytic reduced by AgNPs using NaBH 4 as reducing agent. [14,[27][28][29][30] In this paper, the Acid Violet 7 was selected for the evaluation of the catalytic activity of the tea polyphenols green synthesized AgNPs in the aqueous solution with NaBH 4 . The UV-vis spectrum of aqueous solution showed strong absorption at 523 nm.…”

Section: Catalytic Degradation Of Acid Violetmentioning

confidence: 99%

“…Silver nanoparticles (AgNPs) attractive more attention among the noble metals due to its exclusive properties like electrochemical, electrical conductivity, photo catalytic, chemical stability, magnetic, chemo catalytic and antimicrobial activities [7][8][9][10][11][12] . Silver plays an important role in drug delivery, wastewater treatment, agriculture, biosensor and textile industries [13][14][15] . The synthesis of nanoparticles by various physical and chemical methods, such as ultrasonic irradiation [16] , laser ablation [17] , evaporative cooling [18] , chemical vapor deposition [19] , explosion [20] , impregnation [21] , co-precipitation [22] , sol-gel [23] and deposition-precipitation [24] , has been reported extensively.…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of Silver Nanoparticles Using Natural Plant Extract and Its Catalytic Reductive Degradation of Acid Violet 7

Yao¹,

Xing²,

Chen³

et al. 2017

dteees

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Abstract. In the present study, the silver nanoparticles (AgNPs) were biosynthesized using tea polyphenols in the silver nitrate solution. The tea polyphenols, which was extracted from the green tea leaves, acted as both reducing (from Ag + to Ag 0 ) and capping agent in the liquid phase. The synthesized AgNPs were characterized with UV-visible absorption spectrum, TEM, EDS spectrum and particles size distribution analysis. UV-visible absorption spectrum indicated a significant absorption peak at 425 nm related to the great synthesis of AgNPs in the aqueous solution. TEM images show the diameter of well dispersed AgNPs was around 28nm. The important parameters including pH value, silver nitrate concentration and temperature affected the synthetic reaction of AgNPs significantly. The AgNPs showed excellent catalytic activity in the degradation of Acid Violet 7 by NaBH 4 , and more than 97% Acid Violet 7 was degraded within 18 minutes.

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Biofabricated silver nanoparticles as green catalyst in the degradation of different textile dyes

Cited by 107 publications

References 33 publications

Biosynthesis of Copper Oxide nanoparticles from Drypetes sepiaria Leaf extract and their catalytic activity to dye degradation

Biosynthesis of Copper Oxide nanoparticles from Drypetes sepiaria Leaf extract and their catalytic activity to dye degradation

Limitations and possibilities of green synthesis and long-term stability of colloidal Ag nanoparticles

Biosynthesis of Silver Nanoparticles Using Natural Plant Extract and Its Catalytic Reductive Degradation of Acid Violet 7

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