Preconcentration on metal organic framework UiO-66 for slurry sampling hydride generation-atomic fluorescence spectrometric determination of ultratrace arsenic

Luo, Juan; Xu, Fujian; Hu, Jing; Lin, Ping; Tu, Jiping; Wu, Xi; Hou, Xiandeng

doi:10.1016/j.microc.2017.03.056

Cited by 34 publications

(11 citation statements)

References 44 publications

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“…In order to uncover whether the assembly of CH/ MOF-808 composites synergistically combines the individual MOF-808 and CH components, the experimental adsorption efficiency values for CH 5, CH 10, and CH 15 have been compared with those calculated in the plots of Figure 3b-d adsorption is highly dependent on the presence of attractive charged groups in the adsorbent structure. [61][62][63] As demonstrated by previous research, [42,45,54] MOF-808 shows an As V removal capacity of near 99 % for As V 40 ppm solution (Figures 4a and S9), while CH exhibits a much lower performance (i. e., 20 %). CH/MOF-808 composites show intermediate efficiencies, highly dependent on the MOF-808 content.…”

Section: Resultssupporting

confidence: 55%

Chitin/Metal‐Organic Framework Composites as Wide‐Range Adsorbent

et al. 2021

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Composites based on chitin (CH) biopolymer and metal-organic framework (MOF) microporous nanoparticles have been developed as broad-scope pollutant absorbent. Detailed characterization of the CH/MOF composites revealed that the MOF nanoparticles interacted through electrostatic forces with the CH matrix, inducing compartmentalization of the CH macropores that led to an overall surface area increase in the composites. This created a micro-, meso-, and macroporous structure that efficiently retained pollutants with a broad spectrum of different chemical natures, charges, and sizes. The unique prospect of this approach is the combination of the chemical diversity of MOFs with the simple processability and biocompatibility of CH that opens application fields beyond water remediation.

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Section: Resultssupporting

confidence: 55%

Chitin/Metal‐Organic Framework Composites as Wide‐Range Adsorbent

et al. 2021

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“…Indeed, oxyanion adsorption capacity of UiO-66t ype materials is highly dependent on their defect density degree, as the under-coordinatedp ositions are preferential chemisorption pointso fo xyanions (Scheme 1A,B ). [44][45][46][47][48] Generally speaking, two approaches have been applied in Zr based MOFs in order to endow them of ad ual adsorption/ionreductivef unctionality:i )the organic pillars decoration with electron-donor groups that trigger the chromium reduction [49][50][51] (Scheme 1C)a nd ii)the use of photoactive building blockst hat are able to generate radicals to trigger the Cr VI to Cr III transformation. [21,[52][53][54][55][56] Therefore, depending on the chemical information encoded within the UiO-66 framework, its Cr VI adsorption and, more specifically,i ts ion-reductive capacity can be regulated to different extents.…”

Section: Introductionmentioning

confidence: 99%

“… [28, 41–43] This random linker removal is defined as “defect engineering”, and it is well‐known to significantly affect the porosity and the adsorption/reduction dual capacity of Zr‐MOFs. Indeed, oxyanion adsorption capacity of UiO‐66 type materials is highly dependent on their defect density degree, as the under‐coordinated positions are preferential chemisorption points of oxyanions (Scheme 1 A, B) [44–48] …”

Section: Introductionmentioning

confidence: 99%

Chromium Speciation in Zirconium‐Based Metal–Organic Frameworks for Environmental Remediation

Saiz

Iglesias

Navarrete

et al. 2020

Chemistry A European J

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Acute Cr VI water pollution duet oa nthropogenic activities is an increasing worldwide concern. The high toxicity and mobility of Cr VI makesi tn ecessary to develop dual adsorbent/ion-reductive materialst hat are able to capture Cr VI and transform it efficiently into the less hazardous Cr III. An accurated escription of chromium speciationa tt he adsorbent/ion-reductive matrix is key to assessing whether Cr VI is completely reduced to Cr III ,o ri fi ts incomplete transformation has led to the stabilization of highly reactive, transient Cr V species within the material. With this goal in mind, a dual ultraviolet-visible and electron paramagnetic spectroscopy approachh as been applied to determine the chromium speciation within zirconium-basedm etal-organic frameworks (MOFs). Our findings point out that the generation of defects at Zr-MOFs boosts Cr VI adsorption, whilst the presence of reductiveg roups on the organic linkersp lay ak ey role in stabilizing it as isolated and/or clustered Cr III ions.

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“…recent decades, researchers have explored metal nanoparticles (alone or in combination) based on colorimetric detectors to overcome the sensing system’s drawbacks. Specifically, gold nanoparticles, silver nanoparticles, metal-organic frameworks (MOFs), and metal graphene nanocomposites are extensively employed to fabricate arsenic sensors [ 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 ]. These colorimetric sensors can detect arsenic (III) ions efficiently in an aqueous medium.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Colorimetric Detection of Arsenic Using Metal-Based Nanoparticles

Kolya

Hashitsume

Kang

2021

Toxics

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Nowadays, arsenic (III) contamination of drinking water is a global issue. Laboratory and instrument-based techniques are typically used to detect arsenic in water, with an accuracy of 1 ppb. However, such detection methods require a laboratory-based environment, skilled labor, and additional costs for setup. As a result, several metal-based nanoparticles have been studied to prepare a cost-effective and straightforward detector for arsenic (III) ions. Among the developed strategies, colorimetric detection is one of the simplest methods to detect arsenic (III) in water. Several portable digital detection technologies make nanoparticle-based colorimetric detectors useful for on-site arsenic detection. The present review showcases several metal-based nanoparticles that can detect arsenic (III) colorimetrically at a concentration of ~0.12 ppb or lower in water. A literature survey suggests that biomolecule-based metal nanoparticles could serve as low-cost, facile, susceptible, and eco-friendly alternatives for detecting arsenic (III). This review also describes future directions, perspectives and challenges in developing this alternative technology, which will help us reach a new milestone in designing an effective arsenic detector for commercial use.

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Preconcentration on metal organic framework UiO-66 for slurry sampling hydride generation-atomic fluorescence spectrometric determination of ultratrace arsenic

Cited by 34 publications

References 44 publications

Chitin/Metal‐Organic Framework Composites as Wide‐Range Adsorbent

Chitin/Metal‐Organic Framework Composites as Wide‐Range Adsorbent

Chromium Speciation in Zirconium‐Based Metal–Organic Frameworks for Environmental Remediation

Recent Advances in Colorimetric Detection of Arsenic Using Metal-Based Nanoparticles

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