Fe3O4 Nanoparticles Coated with EDTA and Ag Nanoparticles for the Catalytic Reduction of Organic Dyes from Wastewater

The green synthesis of inorganic nanoparticles (NPs) using bio-materials has attained enormous attention in recent years due to its simple, eco-friendly, low-cost and non-toxic nature. In this work, silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) were synthesized by the marine algae extract, Sargassum serratifolium (SS). The characteristic studies of bio-synthesized SS-AgNPs and SS-AuNPs were carried out by using ultraviolet–visible (UV–Vis) absorption spectroscopy, dynamic light scattering (DLS), high-resolution transmission electron microscope (HR-TEM), selected area electron diffraction (SAED), energy-dispersive X-ray spectroscopy (EDX), X-ray powder diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Phytochemicals in the algae extract, such as meroterpenoids, acted as a capping agent for the NPs’ growth. The synthesized Ag and Au NPs were found to have important catalytic activity for the degradation of organic dyes, including methylene blue, rhodamine B and methyl orange. The reduction of dyes by SS-AgNPs and -AuNPs followed the pseudo-first order kinetics.

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Catalytic Reduction Performance of Carboxylated Alginic Acid Derivatives

10.21203/rs.3.rs-1098571/v1 ◽

2021 ◽

Author(s):

Raed H. Althomali ◽

Khalid A. Alamry ◽

Mahmoud Hussein Abdo ◽

Shams H. Abdel-Hafez

Keyword(s):

Metal Complexes ◽

Metal Ion ◽

Alginic Acid ◽

Catalytic Reduction ◽

Organic Dyes ◽

Reduction Process ◽

Spectroscopic Techniques ◽

Reduction Behavior ◽

Long Time ◽

Ft Ir

Abstract In this study, the catalytic reduction behavior of carboxylated alginic acid derivatives has been investigated against the harmful organic dyes including Methyl Orange (MO) and Congo Red (CR). Alginic acid was firstly oxidized through an easy addition of KMnO4 as an oxidizing agent. A carboxylated alginic acid (CAA) has been interacted with selected metal ions (Sn, Fe, Ni, and Zr) through coordination bonds at the value of pH = 4 to form the corresponding metal complexes namely: Sn-CAA, Fe-CAA, Ni-CAA and Zr-CAA. The consistency of the coordination was confirmed by several spectroscopic techniques including FT-IR, XRD, SEM, and EDX. The catalytic reduction of these metal ion-based products was carried out against MO and CR in the presence of NaBH4 as a reducing agent under UV irradiation. All catalysts based metal complexes showed enhanced catalytic reduction against CR compared to MO. Among all those mentioned metal complexes Sn-CAA showed the best catalytic reduction of these dyes. The time taken by the Sn-CAA for CR, and MO is 5 and 7min respectively. Ni-CAA was classified as the second efficient product against both dyes, where the reduction process took 20 and 9 min respectively. The other two catalysts took a long time for CR and MO reduction. Zr-CAA showed more than 80 % reduction of only CR dye within 20 min. Whereas, Fe-CAA did not show any significant sign of reduction against both the dyes after the same time. The order of higher catalytic reduction was illustrated as: Sn-CAA > Ni-CAA > Zr-CAA = Fe-CAA.

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A facile biogenic-mediated synthesis of Ag nanoparticles over anchored ZnO for enhanced photocatalytic degradation of organic dyes

Photocatalytic Degradation of Dyes ◽

10.1016/b978-0-12-823876-9.00018-4 ◽

2021 ◽

pp. 275-287

Author(s):

Saran Sarangapany ◽

Kaustubha Mohanty

Keyword(s):

Photocatalytic Degradation ◽

Ag Nanoparticles ◽

Organic Dyes

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Mussel-Inspired Magnetic Nanoflowers as an Effective Nanozyme and Antimicrobial Agent for Biosensing and Catalytic Reduction of Organic Dyes

ACS Omega ◽

10.1021/acsomega.0c01864 ◽

2020 ◽

Vol 5 (30) ◽

pp. 18766-18777 ◽

Cited By ~ 1

Author(s):

Mahsa Mohammad ◽

Fatemeh Ahmadpoor ◽

Seyed Abbas Shojaosadati

Keyword(s):

Antimicrobial Agent ◽

Catalytic Reduction ◽

Organic Dyes

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Morphology-dependent interfacial interactions of Fe2O3 with Ag nanoparticles for determining the catalytic reduction of p-nitrophenol

Journal of Environmental Sciences ◽

10.1016/j.jes.2020.02.001 ◽

2020 ◽

Vol 92 ◽

pp. 1-10 ◽

Cited By ~ 2

Author(s):

Ningning Wang ◽

Shuai Zeng ◽

Hong Yuan ◽

Jin Huang

Keyword(s):

Ag Nanoparticles ◽

Catalytic Reduction ◽

Interfacial Interactions

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Bioinspired silver nanoparticles/reduced graphene oxide nanocomposites for catalytic reduction of 4-nitrophenol, organic dyes and act as energy storage electrode material

Composites Part B Engineering ◽

10.1016/j.compositesb.2019.106924 ◽

2019 ◽

Vol 173 ◽

pp. 106924 ◽

Cited By ~ 10

Author(s):

Haradhan Kolya ◽

Tapas Kuila ◽

Nam Hoon Kim ◽

Joong Hee Lee

Keyword(s):

Silver Nanoparticles ◽

Graphene Oxide ◽

Energy Storage ◽

Reduced Graphene Oxide ◽

Electrode Material ◽

Catalytic Reduction ◽

Organic Dyes ◽

Reduced Graphene

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Synthesis of free-standing silver nanoparticles coated filter paper for recyclable catalytic reduction of 4-nitrophenol and organic dyes

Cellulose ◽

10.1007/s10570-019-02945-5 ◽

2019 ◽

Vol 27 (4) ◽

pp. 2279-2292 ◽

Cited By ~ 1

Author(s):

Melisew Tadele Alula ◽

Peter Lemmens ◽

Mothusi Madiba ◽

Bokang Present

Keyword(s):

Silver Nanoparticles ◽

Filter Paper ◽

Catalytic Reduction ◽

Organic Dyes ◽

Free Standing

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Photochemical conversion of AgCl nanocubes to hybrid AgCl–Ag nanoparticles with high activity and long-term stability towards photocatalytic degradation of organic dyes

Canadian Journal of Chemistry ◽

10.1139/v2012-079 ◽

2012 ◽

Vol 90 (10) ◽

pp. 858-864 ◽

Cited By ~ 12

Author(s):

Jizhuang Wang ◽

Changhua An ◽

Meiyu Zhang ◽

Chuan Qin ◽

Xijuan Ming ◽

...

Keyword(s):

Ag Nanoparticles ◽

Environmental Remediation ◽

Organic Dyes ◽

Clean Energy ◽

Active Species ◽

Significant Loss ◽

Term Stability ◽

Long Term Stability ◽

Photochemical Conversion

The performance of a photocatalytic reaction is mainly determined by the quality of the photocatalyst. For real applications, significantly enhancing the stability and activity of the photocatalysts still remains a challenge for materials scientists and chemists. In this paper, we have achieved a highly efficient plasmonic AgCl–Ag nanophotocatalyst via photochemical conversion of AgCl nanocubes. Compared with reported photocatalysts, the as-achieved nanophotocatalyst exhibits superior activity, long-term stability, and wide applicability in the decomposition of organic dye pollutants. For example, only 30 s is needed to bleach methyl orange molecules assisted by AgCl–Ag nanoparticles. Furthermore, the catalyst can be reused up to 50 times without significant loss of activity. A possible mechanism was discussed and the specified photocatalytic reactions verified that both O2•– and OH• radicals were the main active species in decomposing pollutants. The excellent performance of the present photocatalyst suggests promising applications in environmental remediation, clean energy creation, and solar cells.

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