A ligand-based conjugate solid sensor for colorimetric ultra-trace gold(III) detection in urban mining waste

Mohamed, Shaimaa K.; Hassan, Hassan M.A.; Shahat, Ahmed; Awual, Md. Rabiul; Kamel, Rasha M.

doi:10.1016/j.colsurfa.2019.123842

Cited by 51 publications

(6 citation statements)

References 121 publications

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“…The traditional method for treating wastewater includes adsorption, chemical oxidation, membrane ltration, biological treatment and electrochemical treatment (Ejder-Korucu et al 2015; Awual et al 2020). Organic dyestuffs are decolored by the chemical oxidation process utilizing Fenton's reagent (Mohamed et al 2018(Mohamed et al , 2019.…”

Section: Introductionmentioning

confidence: 99%

Room temperature fabrication of cobalt mullite for the snappy adsorption of cationic and anionic dyes

Gopal

Kannan

2023

Environ Sci Pollut Res

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Cobalt mullite adsorbent for the robust adsorption performance towards Victoria Blue (VB) and Metanil Yellow (MY) is fabricated by the sol-gel method at room temperature using dipropylamine as a structuredirecting agent. The synthesized adsorbent is characterized by XRD, FT-IR and HRTEM. From these analyses, it is found that dipropylamine binds with the alumina and cobalt oxide which makes it into tetrahedral to octahedral form. This interaction causes the formation of cobalt mullite. It is observed that trigonal alumina and orthorhombic cobalt mullite are interlinked to form a hybrid network. The special feature of adopting this adsorbent for the adsorption of VB and MY is that it has a large amount of Brønsted acid site because of the octahedral coordination of Al and Co. The large availability of acid sites HighlightsCobalt Mullite is successfully fabricated by sol-gel method at room temperature.Aluminosilicate has tetrahedral framework, but introduction of Co 2+ into it make a hybrid network of tetrahedral and octahedral resulted in the formation of cobalt mullite in the framework.The hybrid framework generate more acidity which aid faster adsorption rate with higher adsorption capacity of VB and MY.

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Section: Introductionmentioning

confidence: 99%

Room temperature fabrication of cobalt mullite for the snappy adsorption of cationic and anionic dyes

Gopal

Kannan

2023

Environ Sci Pollut Res

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“…Schiff bases of (H 2 fsa) can form mononuclear and binuclear chelates when combined with alkyl or aryl monoamines. Schiff bases formed from (H 2 fsa) and aliphatic or aromatic diamines, on the other hand, can create mononuclear when combined with divalent metals 17 . The phenolic oxygen atoms serve as a bridge between the Schiff base ligands for monoamines or diamines to create binuclear complexes, which are known as hexadentate.…”

Section: Introductionmentioning

confidence: 99%

Studies on the synthesis, spectroscopy, thermal properties, docking, and biology of new Schiff base and its mono‐ and binuclear complexes

Abou‐Melha

2023

J of Molecular Recognition

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A novel Schiff base has been synthesized from the condensation of the 3‐formyl‐2‐hydroxybenzoic acid and 4‐nitrobenzene‐1,2‐diamine. The new ligand was found to have two coordination sites. So, it has the capability to form mono‐ and binuclear complexes with different metal ions. The free ligand and its mono‐ and binuclear cobalt(II) complexes have been characterized by UV–Visible spectra, IR, elemental analyzes, H1 NMR, conductimetric, thermal, and magnetic measurements. Results indicated that the cobalt(II) ion is attached to the inside coordination site and the second metal ion attached to the outside coordination site. The complexes are all non‐electrolytes, as demonstrated by the molar conductance tests. The thermodynamic parameters of the metal complexes are calculated using Horowitz Metzger and Coats‐Redfern methods. The complexes' bonding properties have also been estimated. Molecular docking was employed to forecast the interaction of the prepared with the Candida‐albicans receptor (1zap). The biological activities of these metal complexes were tested against some bacteria and fungi. It is evident from the biological screening data that the prepared Co(II) binuclear complexes exhibit predominant activity against Candida albicans, Penicillium oxalicum and Escherichia coli, while they have no activity against Micrococcus roseus and Micrococcus luteus.

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“…Most existing metal sensors are based on the chemical and optical properties of metal substances [1][2][3][4][5][6][7][8][9][10][11][12], concentrating on the reaction between the substance atoms and catalysts [1,3,7], or light excitation [8][9][10][11][12]. Electroreduction from acids (AuCl 4 and [PdCl 4 ] 2 ) was used for recovering gold (Au) and palladium (Pd) [1].…”

Section: Introductionmentioning

confidence: 99%

“…Electroreduction from acids (AuCl 4 and [PdCl 4 ] 2 ) was used for recovering gold (Au) and palladium (Pd) [1]. Silver (Ag) and Au were detected using PH-sensitivity [2] and aminoantipyrine solid [3] by Xray fluorescent system [7]. Surface plasmon, the collective charge oscillations, that occur at the interface between conductors and environment, are mainly used in optical metal sensors.…”

Section: Introductionmentioning

confidence: 99%

Metal Discovery by Highly Sensitive Microwave Multi-Band Metamaterial-Inspired Sensors

Al-Duhni¹,

Wongkasem²

2021

PIER B

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A simple, compact, contactless, and high sensitivity metamaterial-inspired sensor has been developed to detect and classify precious transition metals in the S-and C-band regime, using reflection coefficients. A multi-band metamaterial, quadruple concentric circular split ring resonator, is specifically designed as a sensing enhancer, where the additional bands can effectively trigger the electromagnetic properties, as well as enhance the differentiation between the testing metal samples. The proposed sensor was tested on precious transition metals, silver, platinum, and gold thin slabs of various thicknesses, from 0.5 µm to 3 mm. Five resonances were established in the frequency range of 2-8 GHz. Distinguishable frequency responses generated from different metal samples at those five resonances specify the capability of classifying the metal contents and thicknesses.

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A ligand-based conjugate solid sensor for colorimetric ultra-trace gold(III) detection in urban mining waste

Cited by 51 publications

References 121 publications

Room temperature fabrication of cobalt mullite for the snappy adsorption of cationic and anionic dyes

Room temperature fabrication of cobalt mullite for the snappy adsorption of cationic and anionic dyes

Studies on the synthesis, spectroscopy, thermal properties, docking, and biology of new Schiff base and its mono‐ and binuclear complexes

Metal Discovery by Highly Sensitive Microwave Multi-Band Metamaterial-Inspired Sensors

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