Catalytic reduction of toxic dyes in the presence of silver nanoparticles impregnated core-shell composite microgels

Naseem, Khalida; Begum, Robina; Wu, Weitai; Irfan, Ahmad; Mohammed, Mohammed Elimam Ahamed; Farooqi, Zahoor H.

doi:10.1016/j.jclepro.2018.11.164

Cited by 112 publications

(45 citation statements)

References 44 publications

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“…From the figure, it shows that a similar trend was observed as in RB dyes where there are no significant changes observed after 120 min. This proved that the reduction of MB dye by NaBH 4 is not kinetically favorable [ 48 ]. However, after the addition of C. pentandra /Ag-NPs, the fast reduction time occurred within 20 min (99%) as shown in Figure 17 b.…”

Section: Resultsmentioning

confidence: 99%

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In-Situ Biofabrication of Silver Nanoparticles in Ceiba pentandra Natural Fiber Using Entada spiralis Extract with Their Antibacterial and Catalytic Dye Reduction Properties

et al. 2020

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It is believed of great interest to incorporate silver nanoparticles (Ag-NPs) into stable supported materials using biological methods to control the adverse properties of nanoscale particles. In this study, in-situ biofabrication of Ag-NPs using Entada spiralis (E. spiralis) aqueous extract in Ceiba pentandra (C. pentandra) fiber as supporting material was used in which, the E. spiralis extract acted as both reducing and stabilizing agents to incorporate Ag-NPs in the C. pentandra fiber. The properties of Ag-NPs incorporated in the C. pentandra fiber (C. pentandra/Ag-NPs) were characterized using UV-visible spectroscopy (UV-vis), X-ray Diffraction (XRD), Field Emission Transmission Electron Microscope (FETEM), Scanning Electron Microscope (Scanning Electron Microscope (SEM), Energy Dispersive X-ray (EDX), Brunauer-Emmett-Teller (BET), Thermogravimetric (TGA) and Fourier Transform Infrared (FTIR) analyses. The average size of Ag-NPs measured using FETEM image was 4.74 nm spherical in shape. The C. pentandra/Ag-NPs was easily separated after application, and could control the release of Ag-NPs to the environment due to its strong attachment in C. pentandra fiber. The C. pentandra/Ag-NPs exposed good qualitative and quantitative antibacterial activities against Staphylococcus aureus (ATCC 25923), Enterococcus faecalis (ATCC 29212), Escherichia coli (ATCC 25922) and Proteus vulgaris (ATCC 33420). The dye catalytic properties of C. pentandra/Ag-NPs revealed the dye reduction time in which it was completed within 4 min for 20 mg/L rhodamine B and 20 min for 20 mg/L methylene blue dye, respectively. Based on the results, it is evident that C. pentandra/Ag-NPs are potentially promising to be applied in wound healing, textile, wastewater treatment, food packaging, labeling and biomedical fields.

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Section: Resultsmentioning

confidence: 99%

“…Diffused

ions produced hydrogen that was attached over the Ag-NPs surface together with dye molecules. Then, the electron transfer between Ag-NPs donated by

ions to the dye molecules were occurred to degrade dye [ 48 ].…”

Section: Resultsmentioning

confidence: 99%

In-Situ Biofabrication of Silver Nanoparticles in Ceiba pentandra Natural Fiber Using Entada spiralis Extract with Their Antibacterial and Catalytic Dye Reduction Properties

et al. 2020

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“…The dark orange solution of methyl orange was being changed to a colorless solution within 15 min, and a significant decrease in the absorption intensity was also recorded. These results proposed that AgNPs cleaved the -N=N-functional group of methyl orange which subsequently decolorizes the target solution (Naseem et al, 2019;Raj et al, 2020). The BH −1 4 and methyl orange adsorb on the surface of nanoparticles in aqueous solution.…”

Section: Evaluation Of the Catalytic Activity Of Agnpsmentioning

confidence: 94%

Dual Colorimetric Sensor for Hg2+/Pb2+ and an Efficient Catalyst Based on Silver Nanoparticles Mediating by the Root Extract of Bistorta amplexicaulis

2020

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Environmental pollution derivated from toxic metals and organic toxins is becoming a serious issue worldwide because of their harmful effects on the ecosystem and human health. Here we are reporting an extremely selective and cost-effective colorimetric sensor for simultaneous recognition of Hg 2+ and Pb 2+ by using green synthesized silver nanoparticles (AgNPs) mediated from the environmental friendly roots extract of Bistorta amplexicaulis. Biogenic synthesized AgNPs were well-characterized by various spectroscopic techniques e.g., UV-vis, FT-IR, XRD, AFM, and Zetasizer. The photophysical potential of synthesized AgNPs toward common metal cations was explored via absorption spectroscopy and colorimetric assay. The hypsochromic shift in the SPR band of AgNPs can easily be detected through naked eyes vision from dark brown to light yellow in the case of Hg 2+. A substantial reduction in the absorbance of AgNPs was recorded upon mixing with Pb 2+. AgNPs based colorimetric sensor is highly sensitive toward Hg 2+ and Pb 2+ with a limit of detection (LOD) of 8.0 × 10 −7 M and 2.0 × 10 −7 M for Hg 2+ and Pb 2+ , respectively. Furthermore, AgNPs showed promising catalytic activity for the degradation of methyl orange dye. These results demonstrate that Bistorta amplexicaulis stabilized silver nanoparticles have potential applications as a colorimetric sensor and an effective catalyst for the degradation of methyl orange.

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“…Silver nanoparticles have gained attention as catalysts for various reduction reactions ( Begum et al, 2019 , 2017 ; Naseem et al, 2019 ; Begum et al, 2016 ) but their utility as nano-catalyst for Cr(VI) reduction is limited ( Chen et al, 2018a ; Liu et al, 2016a ). Low stability of Ag nanoparticles as compared to other noble metal (Pt and Pd etc.)…”

Section: Classification Of Inorganic Nanoparticles Reported For Cr(vimentioning

confidence: 99%

Inorganic nanoparticles for reduction of hexavalent chromium: Physicochemical aspects

Farooqi

Akram

Begum

et al. 2021

Journal of Hazardous Materials

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107

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Catalytic reduction of toxic dyes in the presence of silver nanoparticles impregnated core-shell composite microgels

Cited by 112 publications

References 44 publications

In-Situ Biofabrication of Silver Nanoparticles in Ceiba pentandra Natural Fiber Using Entada spiralis Extract with Their Antibacterial and Catalytic Dye Reduction Properties

In-Situ Biofabrication of Silver Nanoparticles in Ceiba pentandra Natural Fiber Using Entada spiralis Extract with Their Antibacterial and Catalytic Dye Reduction Properties

Dual Colorimetric Sensor for Hg2+/Pb2+ and an Efficient Catalyst Based on Silver Nanoparticles Mediating by the Root Extract of Bistorta amplexicaulis

Inorganic nanoparticles for reduction of hexavalent chromium: Physicochemical aspects

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