Concentration Dependent Catalytic Activity of Glutathione Coated Silver Nanoparticles for the Reduction of 4-Nitrophenol and Organic Dyes

Rajamanikandan, Ramar; Shanmugaraj, Krishnamoorthy; Ilanchelian, Malaichamy

doi:10.1007/s10876-016-1095-7

Cited by 31 publications

(19 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The cationic MB dye revealed UV-Visible absorption at 665 nm (Fig.8 b). Here, the deep blue colour of the solution changed to colorless, which indicated the conversion of MB dye to leuco form and it matched well with the previous reported work on catalytic degradation of MB dye by sodium borohydride in the presence of glutathione coated Ag nanoparticles [36]. MB being cationic in nature underwent faster reduction than anionic dye CR.…”

Section: Reduction Of Thiazine Dye (Mb) Azo Dye (Cr) and 4-nitrophesupporting

confidence: 90%

“…These were also confirmed from the rate constant and ΔG values. Similarly, the reduction of 4-nitrophenol was followed at the chromophoric absorption (λ max, nm) peak of 4-nitrophenolate ion at 401 nm [36,37]. As reduction reaction proceeded, the intensity at 401 nm was found to decrease with simultaneous appearance of new peaks at 300 and 230 nm attributed to the formation of 4-aminophenol ( Fig.8 c) [37].…”

Section: Reduction Of Thiazine Dye (Mb) Azo Dye (Cr) and 4-nitrophementioning

confidence: 85%

“…In comparison, over Ag nanoparticles 4-NP, methylene blue and eosin Y type dyes are reduced in the presence of sodium borohydride with a faster reduction rate (20 min.) [36]. Nie et al have reported Pt supported reduced graphene oxide with 100 % conversion of nitroarenes [29].…”

Section: Reduction Of Thiazine Dye (Mb) Azo Dye (Cr) and 4-nitrophementioning

confidence: 99%

“…In the reaction, step 1 involves the simultaneous adsorption of dye and sodium borohydride on the surface of the catalyst. The step 2 involves the transfer of electron or hydride from 4 BH  ---Pt nanoparticles to dyes and desorption of reduced form of dye molecules (Leuco dye) [36,27]. In general, the reaction proceeds through the following steps…”

Section: Mechanism Of Reduction Processmentioning

confidence: 99%

See 3 more Smart Citations

Arachis hypogaea derived activated carbon/Pt catalyst: Reduction of organic dyes

Vandarkuzhali

Karthikeyan

Viswanathan

et al. 2018

Surfaces and Interfaces

View full text Add to dashboard Cite

Section: Reduction Of Thiazine Dye (Mb) Azo Dye (Cr) and 4-nitrophesupporting

confidence: 90%

Section: Reduction Of Thiazine Dye (Mb) Azo Dye (Cr) and 4-nitrophementioning

confidence: 85%

Section: Reduction Of Thiazine Dye (Mb) Azo Dye (Cr) and 4-nitrophementioning

confidence: 99%

Section: Mechanism Of Reduction Processmentioning

confidence: 99%

See 2 more Smart Citations

Arachis hypogaea derived activated carbon/Pt catalyst: Reduction of organic dyes

Vandarkuzhali

Karthikeyan

Viswanathan

et al. 2018

Surfaces and Interfaces

View full text Add to dashboard Cite

“…In the last decade, green synthesis of metal nanoparticles has been exponentially increasing because of its various applications, such as electronics, catalysis, chemistry, energy, and medicine [ 1 , 2 , 3 ]. In particular, silver nanoparticles (AgNPs) have many important applications in several fields, such as high sensitivity biomolecular detection and diagnostics [ 4 , 5 , 6 ], antimicrobials [ 7 , 8 , 9 , 10 , 11 , 12 , 13 ], catalysis [ 14 , 15 , 16 , 17 , 18 ], optics [ 19 ], biomedicine [ 20 ], medicine [ 21 , 22 ], as well as food and cosmetic industries [ 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis and Catalytic Activity of Silver Nanoparticles Based on Piper chaba Stem Extracts

2020

View full text Add to dashboard Cite

A green synthesis of silver nanoparticles (AgNPs) was conducted using the stem extract of Piper chaba, which is a plant abundantly growing in South and Southeast Asia. The synthesis was carried out at different reaction conditions, i.e., reaction temperature, concentrations of the extract and silver nitrate, reaction time, and pH. The synthesized AgNPs were characterized by visual observation, ultraviolet–visible (UV-vis) spectroscopy, dynamic light scattering (DLS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), x-ray diffraction (XRD), energy dispersive x-ray (EDX), and Fourier transform infrared (FTIR) spectroscopy. The characterization results revealed that AgNPs were uniformly dispersed and exhibited a moderate size distribution. They were mostly spherical crystals with face-centered cubic structures and an average size of 19 nm. The FTIR spectroscopy and DLS analysis indicated that the phytochemicals capping the surface of AgNPs stabilize the dispersion through anionic repulsion. The synthesized AgNPs effectively catalyzed the reduction of 4-nitrophenol (4-NP) and degradation of methylene blue (MB) in the presence of sodium borohydride.

show abstract

Catalytic activity of silver nanocomposite alginate beads for degradation of basic dye: Kinetic and isothermal study

Albalwi

Fadl

Ibrahim

et al. 2021

Applied Organom Chemis

View full text Add to dashboard Cite

As the removal of toxic dyes by catalytic degradation is interestingly growing field, diverse types of nanomaterials are used intensively as a catalyst to enhance the catalytic degradation of toxic dyes in the last decades. The unique property of ionic crosslinking of the biopolymer sodium alginate (Na-ALG) in presence of CaCl 2 solution is exploited to prepare Ca-alginate (Ca-ALG) microbeads, which further used as precursor for in situ silver nanoparticles (Ag NPs) formation by the effect of gamma radiation to obtain Ca-ALG/Ag nanocomposite beads. The amount of silver ions adsorbed by the Ca-ALG beads before reduction was evaluated by using ultraviolet-visible spectrophotometer (UV-Vis). The physicochemical properties of prepared Ca-ALG/Ag nanocomposite beads were studied by various techniques as X-ray diffraction (XRD) and transmission electron microscopy (TEM) for approving the creation of Ag NPs and assessing its morphology and particle magnitude. The catalytic reduction ability of the resulting Ca-ALG/Ag nanocomposite beads is studied toward the degradation of basic blue 3 dye as a model anionic dye by the aid of the reducing agent NaBH 4 under various factors including time, pH, catalyst's dosage, NaBH 4 contents, and dye's initial concentration. Various kinetics and isothermal models were applied for forecasting the mechanism of the degradation process using the prepared catalyst beads. The kinetics and isothermal study revealed that the degradation process using Ca-LG/Ag nanocomposite beads as a catalyst in presence of NaBH 4 as a reducing agent was best fit the pseudo-second-order model and Langmuir isotherm model.

show abstract

Concentration Dependent Catalytic Activity of Glutathione Coated Silver Nanoparticles for the Reduction of 4-Nitrophenol and Organic Dyes

Cited by 31 publications

References 58 publications

Arachis hypogaea derived activated carbon/Pt catalyst: Reduction of organic dyes

Arachis hypogaea derived activated carbon/Pt catalyst: Reduction of organic dyes

Green Synthesis and Catalytic Activity of Silver Nanoparticles Based on Piper chaba Stem Extracts

Catalytic activity of silver nanocomposite alginate beads for degradation of basic dye: Kinetic and isothermal study

Contact Info

Product

Resources

About