Heterogeneous catalysis in 4-nitrophenol degradation and antioxidant activities of silver nanoparticles embedded in Tapioca starch

Kalantari, Katayoon; Afifi, Amalina M.; Bayat, Saadi; Shameli, Kamyar; Yousefi, Samira; Mokhtar, Norrashidah; Kalantari, Alireza

doi:10.1016/j.arabjc.2016.12.018

Cited by 35 publications

(20 citation statements)

References 34 publications

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“…The catalytic activity of metal nanoparticles has extensively investigated in the field of water pollution remediation. Many research groups have demonstrated the effective utilization of noble metal NPs or metal NP incorporated composites systems as a suitable redox catalyst for the degradation of various organic pollutants like dyes, drugs and aromatic nitro compounds [12][13][14][15][16][17][18][19]. Additionally unique electrochemical features and high conductivity of AgNPs identifies AgNPs as a good candidate for selective and sensitive monitoring of biomolecules and pharmaceuticals [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Novel green synthesis of silver nanoparticles using clammy cherry (Cordia obliqua Willd) fruit extract and investigation on its catalytic and antimicrobial properties

et al. 2019

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In this study, highly monodispersed, exceptionally stable, spherical silver nanoparticles (AgNPs) were successfully synthesized by the microwave assisted rapid and cost-effective green method. Aqueous extract of clammy cherry (Cordia obliqua Willd) fruit was used as the green reductant, and capping agent for the synthesis of AgNPs and the effect of different synthesis parameters on the optical properties of the synthesized AgNPs was also studied. The characterization of synthesized AgNPs by Fourier transform infrared spectroscopy, X-ray diffraction studies, UV-visible spectroscopy, scanning electron microscopy and transmission electron microscopy (TEM) revealed the formation of small AgNPs with narrow size distribution. TEM studies corroborated that the AgNPs are highly crystalline and spherical with an average diameter of 7.13 nm. The cyclic voltammetry profile of AgNPs modified electrode in NaOH depicted prominent redox peaks evidencing an impressive electrochemical response. The AgNPs manifested high catalytic activity towards reduction of methyl orange and rhodamine blue with apparent rate constant 0.3038 min −1 and 0.1542 min −1 respectively. Additionally, the prepared AgNPs exhibited strong antibacterial efficacy against the tested microbes.

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Section: Introductionmentioning

confidence: 99%

Novel green synthesis of silver nanoparticles using clammy cherry (Cordia obliqua Willd) fruit extract and investigation on its catalytic and antimicrobial properties

et al. 2019

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“…AgNO 3 solutions were added drop‐wise to alkaline treated starches. At the end of reaction, the system color turns to dark brown which confirms the synthesis of Ag‐NPs . UV–vis absorption measurements were done using a (Shimadzu UV 2401pc) spectrophotometer in the 300–700 nm wavelength range as the first indication for Ag‐NPs.…”

Section: Methodsmentioning

confidence: 97%

“…In our previous report, a simple, green, and eco‐friendly method has been reported for the synthesis of Ag‐NPs in alkaline treated Tapioca starch. The XRD results indicated that Ag‐NPs were produced after stirring for several hours at 80 °C and the TEM image showed they were in spherical shape with average size of 11 nm …”

Section: Introductionmentioning

confidence: 99%

Electro‐Catalytic Behavior of Silver Nanoparticles Embedded in Potato and Tapioca Starch for Oxygen Reduction Reaction

et al. 2018

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The present work demonstrates an eco‐friendly and facile method for the synthesis of tapioca and potato starches incorporated by silver nanoparticles hereafter named (T‐Ag/NPs) and (P‐Ag/NPs), respectively. The analysis of UV–vis showed the appearance of surface plasmon resonance. The TEM analysis shows the formation of highly distributed Ag/NPs with an average diameter and standard deviation of 19.65 ± 2.45 and 12.27 ±7.39 nm for (P‐Ag/NPs) and (T‐Ag/NPs), respectively. The prepared (T‐Ag/NPs) show remarkable potential applicability in energy as low‐cost electrode material compared with (P‐Ag/NPs). They are used as a non‐precious catalyst for oxygen reduction reaction (ORR) in the alkaline medium. The presence of starch promotes long‐term stability up to 1000 cycles and avoid the dissolution and agglomeration of silver nanoparticles. The (T‐Ag/NPs) show significant stability and reproducibility.

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“…67 In the presence of NaBH 4 as reducing agent, the colour of 4-nitro phenol solution instantly changed to greenish yellow and the absorption maximum at 317 nm was red shifted to 400 nm due to the formation of 4-nitrophenolate ions in the alkaline condition caused by the addition of NaBH 4 . 68 Hydrogenation of 4nitro phenol to 4-amino phenol was carried out by alkaline tapioca starch 69 and Lawsonia inermis 70 capped silver nano using NaBH 4 .…”

Section: Degradation Of Nitro Compoundsmentioning

confidence: 99%

Treatment of Water Effluents Using Silver Nanoparticles

Mathew

Punnoose

2018

MSEIJ

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The water from industries with potential hazardous organic matters when discharged into the water bodies cause undesirable effects to the environment, aquatic life and human health. So it is necessary to treat waste water prior to their disposal. Degradation of organic pollutants is a major concern in the present scenario due to its stability, fastness to sunlight, resistance to degrading agents or microbial attack. It is mainly achieved by silver metal nanoparticles synthesised by green route. Degradation of dyes using metal nanoparticles is an environmental benign method. Silver metal nanoparticles show high catalytic potential due to its unique property of smaller structure and large surface to volume ratio. This review provides a detailed report of the degradation of various organic pollutants by phyto synthesised silver metal nanoparticles.

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Heterogeneous catalysis in 4-nitrophenol degradation and antioxidant activities of silver nanoparticles embedded in Tapioca starch

Cited by 35 publications

References 34 publications

Novel green synthesis of silver nanoparticles using clammy cherry (Cordia obliqua Willd) fruit extract and investigation on its catalytic and antimicrobial properties

Novel green synthesis of silver nanoparticles using clammy cherry (Cordia obliqua Willd) fruit extract and investigation on its catalytic and antimicrobial properties

Electro‐Catalytic Behavior of Silver Nanoparticles Embedded in Potato and Tapioca Starch for Oxygen Reduction Reaction

Treatment of Water Effluents Using Silver Nanoparticles

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