Selective adsorption of Au(III) with ultra-fast kinetics by a new metal-organic polymer

Zhou, Shuxian; Mo, Xiaohui; Zhu, Wu; Xu, Weifeng; Tang, Kewen; Lei, Yajun

doi:10.1016/j.molliq.2020.114125

Cited by 40 publications

(9 citation statements)

References 38 publications

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“…The maximum uptake of Au(III) by POSS-2 is high and up to 1486.5 mg/g. The performance is better than most of the reported Au(III) adsorbents, such as cross-linked polyethyleneimine resins (943.5 mg/g), a bioadsorbent from tannin acid and dialdehyde corn starch (298.5 mg/g), MoS 2 nanoflakes (1133 mg/g), plant tannin immobilized Fe 3 O 4 @SiO 2 microspheres (917.43 mg/g), and metal–organic polymers (775.0 mg/g) . It is worthy to note that the thiourea-containing Au(III) adsorbents, including the present adsorbent POSS-2, PAF-1-thiourea (2629.87 mg/g), and thiourea-grafted polyacrylonitrile fibers (3257.3 mg/g), possess high capacity, indicating that the thiourea group is an excellent adsorption unit for Au(III) adsorption due to its strong binding force and redox capability.…”

Section: Resultsmentioning

confidence: 88%

An Imidazole Thione-Modified Polyhedral Oligomeric Silsesquioxane for Selective Detection and Adsorptive Recovery of Au(III) from Aqueous Solutions

Chen

Wang

Feng

et al. 2021

ACS Appl. Mater. Interfaces

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Developing a material toward simultaneous detection and recovery of gold ions (Au(III)) is highly desirable for the economy and the environment. Herein, we report a highly efficient dual-function material for simultaneous Au(III) detection and recovery by simply introducing abundant imidazole thione and thioether groups in one system. This material, that is, an imidazole thione-modified polyhedral oligomeric silsesquioxane (POSS-2), was prepared by a mild reaction of an imidazolium-containing POSS and sulfur at ambient temperature. The POSS-2 suspension in water can rapidly and selectively detect Au(III) with a very low limit of detection of 1.2 ppb by fluorescence quenching or a visualized color change from white to dark orange. POSS-2 can also selectively and efficiently capture Au(III) with a maximum adsorption uptake of 1486.5 mg/g. The adsorption process well fits with the pseudo-second-order kinetic and Langmuir models. The intriguing dual-function performance is better than most of the previous Au(III) probes or adsorbents. The mechanism study reveals that the detection and adsorption behavior are mainly caused by the redox reaction and coordination between imidazole thione and thioether groups and Au(III). Furthermore, POSS-2 was successfully utilized to extract gold without interference from a discard CPU. These results indicate the potential application of the present dual-function material for Au(III) detection and recovery from aqueous solutions. More dual-functional materials could be designed and prepared by this simple strategy.

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Section: Resultsmentioning

confidence: 88%

An Imidazole Thione-Modified Polyhedral Oligomeric Silsesquioxane for Selective Detection and Adsorptive Recovery of Au(III) from Aqueous Solutions

Chen

Wang

Feng

et al. 2021

ACS Appl. Mater. Interfaces

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“…2d) which was to be 74.98 m 2 /g, indicated that CTOP is a microporous polymer. eV), C-H (287.9 eV) [29,30] ; the N 1s spectrum (Fig. 2f) was divided into a doublet, namely C-N (399.53 eV) and C=N (400.1 eV) [29,30]; the S 2p spectrum (Fig.…”

Section: Characterization and Analysis Of Ctopmentioning

confidence: 99%

Synthesis of Covalent Thiourea Organic Polymer (CTOP) and Adsorption of Au (Ⅲ)

Wang

Zheng

Liu

et al. 2023

Preprint

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In this paper, the covalent organic polymer of enaminone was modified by thiourea, and the covalent organic polymer of thiourea (CTOP) was synthesized by simple solvothermal method. At 25 ℃, the adsorption capacity of the polymer for trivalent gold ion is 2372.7 mg/g. In the mixed aqueous solution of divalent cadmium ion, trivalent gold ion, divalent copper ion, divalent cobalt ion and divalent nickel ion, CTOP can only adsorb trivalent gold ion, which indicates that CTOP has high selective adsorption performance for trivalent gold ion. In addition, CTOP material still maintains high adsorption performance after five adsorption cycles, which proves that the adsorption material has good reusability. According to the experimental results of adsorption kinetics and thermodynamics, the adsorption process of CTOP for trivalent gold ions conforms to the quasi second order adsorption model and Langmuir adsorption model, that is, the adsorption process of CTOP for trivalent gold ions is single-layer chemical adsorption. CTOP not only has strong adsorption and selectivity to Au (Ⅲ), but also has good reusability. Therefore, it is an ideal environmental functional material, which can be used to separate and enrich trivalent gold ions in wastewater.

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“…So far, various conventional adsorbent materials including activated carbon, zeolite, diatomite, chitosan, montmorillonite, etc., have been put into service (Belbel et However, these materials have certain limitations, such as di culty in obtaining, low adsorption rate, high cost and secondary pollution. During the years, Metal Organic Polymers (MOPs), an emerging polymeric materials with 2D or 3D structure, has been proved to have broad diverse structures, good chemical stability and high design exibility (Elewa et Zhou et al 2020). The polymers comprised of metal node centers connected via organic linkers and had free lone pairs of electrons on their surfaces, which was suitable for chelating with the adsorbates for increasing adsorption e ciencies as well as reinforcing structure stability of absorbents for improving the service life in adsorption applications.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Self-assembled Starch-based Organometallic Polymers and Their Efficient Adsorption of Mercury Ion in Water

Geng

Yang

Lin

et al. 2022

Preprint

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Herein, a newly-developed material called Thiourea@WOx/Starch Polymer (TH@WOx/SP) were prepared by one-pot and high yield solvothermal method. The relevant characterizations and adsorption performance were analyzed by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), fourier transform infrared spectroscopy (FTIR), Zeta potential analysis and differential pulse voltammetry (DPV). Surprisingly, with its abundant active sites, the TH@WOx/SP revealed its excellent adsorption capacity for heavy metal and organics dye, as high as 2201.16 mg/g for Hg (Ⅱ) and 175.01 mg/g for methylene blue (MB), finished within 30 min and 90 min, respectively. These satisfactorily fast and high adsorption capacities not only came down to its concave-convex structure, but also to its enriched functional groups serving as anchor sites for Hg (Ⅱ) and MB. The adsorption mechanism of Hg (Ⅱ) and MB on TH@WOx/SP was carefully evaluated, which could be attributed to covalent coordination, ion exchange, π-π interaction, hydrogen bonds and electrostatic attraction. This work designed a new strategy to develop a novel porous metal organic polymers adsorbents and demonstrated its prospective application in the field of adsorption.

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Selective adsorption of Au(III) with ultra-fast kinetics by a new metal-organic polymer

Cited by 40 publications

References 38 publications

An Imidazole Thione-Modified Polyhedral Oligomeric Silsesquioxane for Selective Detection and Adsorptive Recovery of Au(III) from Aqueous Solutions

An Imidazole Thione-Modified Polyhedral Oligomeric Silsesquioxane for Selective Detection and Adsorptive Recovery of Au(III) from Aqueous Solutions

Synthesis of Covalent Thiourea Organic Polymer (CTOP) and Adsorption of Au (Ⅲ)

Preparation of Self-assembled Starch-based Organometallic Polymers and Their Efficient Adsorption of Mercury Ion in Water

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