Highly Sensitive and Selective Uranium Detection in Natural Water Systems Using a Luminescent Mesoporous Metal–Organic Framework Equipped with Abundant Lewis Basic Sites: A Combined Batch, X-ray Absorption Spectroscopy, and First Principles Simulation Investigation

2017 ◽  
Vol 51 (7) ◽  
pp. 3911-3921 ◽  
Author(s):  
Wei Liu ◽  
Xing Dai ◽  
Zhuanling Bai ◽  
Yanlong Wang ◽  
Zaixing Yang ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Natural Water ◽  
First Principles ◽  
Metal Organic Framework ◽  
Water Systems ◽  
X Ray ◽  
Highly Sensitive ◽  
Metal Organic ◽  
Mesoporous Metal ◽  
X Ray Absorption

scholarly journals Synthesis and characterization of bimetallic metal–organic framework Cu–Ru-BTC with HKUST-1 structure

2015 ◽  
Vol 44 (5) ◽  
pp. 2052-2056 ◽  
Author(s):  
Meike A. Gotthardt ◽  
Roland Schoch ◽  
Silke Wolf ◽  
Matthias Bauer ◽  
Wolfgang Kleist
Keyword(s):  
Absorption Spectroscopy ◽  
Metal Organic Framework ◽  
Partial Substitution ◽  
Synthesis And Characterization ◽  
X Ray ◽  
Mixed Metal ◽  
Metal Framework ◽  
Metal Organic ◽  
X Ray Absorption

A mixed-metal framework Cu–Ru-BTC with the formula Cu2.75Ru0.25(BTC)2·xH2O was successfully synthesized. Partial substitution of Cu2+ by Ru3+ in the paddlewheel structure was proven using X-ray absorption spectroscopy.

scholarly journals Backbonding contributions to small molecule chemisorption in a metal–organic framework with open copper(i) centers

2021 ◽  
Author(s):  
Gregory M. Su ◽  
Han Wang ◽  
Brandon R. Barnett ◽  
Jeffrey R. Long ◽  
David Prendergast ◽  
...  
Keyword(s):  
Fine Structure ◽  
Small Molecule ◽  
Metal Organic Framework ◽  
X Ray ◽  
Metal Site ◽  
Absorption Fine ◽  
Metal Organic ◽  
X Ray Absorption ◽  
Organic Framework

In situ near edge X-ray absorption fine structure spectroscopy directly probes unoccupied states associated with backbonding interactions between the open metal site in a metal–organic framework and various small molecule guests.

scholarly journals Highly Efficient Adsorption of Aqueous Pb(II) with Mesoporous Metal-Organic Framework-5: An Equilibrium and Kinetic Study

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
José María Rivera ◽  
Susana Rincón ◽  
Cherif Ben Youssef ◽  
Alejandro Zepeda
Keyword(s):  
Kinetic Study ◽  
Photoelectron Spectroscopy ◽  
Metal Organic Framework ◽  
Isotherm Models ◽  
Ionic Exchange ◽  
Order Kinetic ◽  
X Ray ◽  
Metal Organic ◽  
Mesoporous Metal ◽  
Organic Framework

Mesoporous metal-organic framework-5 (MOF-5), with the composition Zn4O(BDC)3, showed a high capacity for the adsorptive removal of Pb(II) from 100% aqueous media. After the adsorption process, changes in both morphology and composition were detected using a scanning electron microscope (SEM) equipped with an energy dispersive X-ray (EDX) system, Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) analysis. The experimental evidence showed that Zn(II) liberation from MOF-5 structure was provoked by the water effect demonstrating that Pb(II) removal is not due to ionic exchange with Zn. A kinetic study showed that Pb(II) removal was carried out in 30 min with a behavior of pseudo-second-order kinetic model. The experimental data on Pb(II) adsorption were adequately fit by both the Langmuir and BET isotherm models with maximum adsorption capacities of 658.5 and 412.7 mg/g, respectively, at pH 5 and 45°C. The results of this work demonstrate that the use of MOF-5 has great potential for applications in environmental protection, especially regarding the removal of the lead present in industrial wastewaters and tap waters.

scholarly journals New Insights on the Reversible Lithiation Mechanism of TiO2(B) by Operando X-ray Absorption Spectroscopy and X-ray Diffraction Assisted by First-Principles Calculations

2014 ◽  
Vol 118 (47) ◽  
pp. 27210-27218 ◽  
Author(s):  
Marcus Fehse ◽  
Mouna Ben Yahia ◽  
Laure Monconduit ◽  
Frédéric Lemoigno ◽  
Marie-Liesse Doublet ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
First Principles ◽  
First Principles Calculations ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Absorption
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