The Experts below are selected from a list of 192 Experts worldwide ranked by ideXlab platform
Wei Dai - One of the best experts on this subject based on the ideXlab platform.
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development of a novel core shell magnetic fe3o4 cmc zif 8 oh composite with outstanding Rubidium Ion capacity
Journal of Chemical & Engineering Data, 2019Co-Authors: Ning Tian, Jiaqi Wang, Wei DaiAbstract:A novel core–shell magnetic composite, Fe3O4@CMC@ZIF-8-OH, was innovatively prepared using zeolitic imidazolate frameworks (ZIF-8) functIonalized with carboxymethyl cellulose (CMC), Fe3O4, and phen...
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Water-resistant HKUST-1 functIonalized with polydimethylsiloxane for efficient Rubidium Ion capture
New Journal of Chemistry, 2019Co-Authors: Ning Tian, Yuan Gao, Suqing Luo, Wei DaiAbstract:The water sensitivity of metal–organic frameworks (MOFs) significantly restricts their practical applicatIons in Rubidium Ion (Rb(I)) capture from water. For solving this troublesome problem, we reported a series of synthesized water-resistant adsorbents—PDMS@HKUST-1 (PDMS represents polydimethylsiloxane) by using a facile PDMS-coating treatment on the bimetallic HKUST-1 surface. These composite materials (PDMS@HKUST-1) possess good wettability and exhibit excellent performance of Rb(I) adsorptIon from aqueous solutIons. The performance of the adsorptIon process could be perfectly described by the Freundlich adsorptIon model and the pseudo-second-order equatIon. In additIon, they are well-sustainable, maintaining nearly 100% of the initial Rb(I) uptake capacity after at least five recycles. Through material characterizatIon including nitrogen adsorptIon–desorptIon, powder X-ray diffractIon (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), water contact angle measurements, and X-ray photoelectron spectroscopy (XPS), we proved that these coated adsorbents well inherited the original crystalline nature and pore characteristics of HKUST-1. In general, the PDMS@HKUST-1 material retains good porous structures after coating and this modified MOF displays an outstanding stability which is favorable for Rb(I) capture from aqueous solutIon.
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highly efficient capture of Rubidium Ion by a novel hs fe3o4 mil 53 al composite material
Polyhedron, 2019Co-Authors: Ning Tian, Qing Liu, Yifang Dai, Wei DaiAbstract:Abstract A general synthetic strategy for HS-Fe3O4@MIL-53(Al) adsorbent has been developed in this work. The composite material exhibits an efficient capture performance for Rubidium Ion due to sulfhydryl group and magnetic Fe3O4 doped in its porous cavity. The results of X-ray diffractIon, scanning electron microscopy, Fourier transform infrared spectroscopy, and N2 adsorptIon–desorptIon proved that the HS-Fe3O4 was immobilized in the composite material. High Rb+ uptake capacity over the HS-Fe3O4@MIL-53(Al) is attributed to the exchange of acidic protons between the sulfhydryl group and the Rb+. The pseudo-second-order and Freundlich model could make a good descriptIon of the adsorptIon process. The Rb+ sorptIon selectivity was moderately influenced by any co-Ions effect (K+, Na+ and Cs+) due to HS-Fe3O4 doped. These results reveal that our novel composite material might be a promising industrial adsorbent for Rb+ capture.
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Rubidium Ion Capture with a phosphotungstic acid-functIonalized finger-citron-residue-based carbon
RSC Advances, 2019Co-Authors: Qing Liu, Guihua Zhao, Yifang Dai, Wei DaiAbstract:To solve the contradictIon of diffusIon and selectivity, we reported a novel finger-citron-residue-based mesoporous carbon (FMC) as a support to prepare a novel adsorbent PTA@FMC (PTA represents phosphotungstic acid) for Rubidium Ion capture. This new adsorbent was characterized by X-ray diffractIon, thermogravimetric analysis, scanning electron microscopy, Fourier transform infrared spectroscopy, and N2 adsorptIon, and the results showed that the PTA was immobilized in the FMC structure. Based on the results of batch tests, we demonstrated that PTA@FMC is the most distinctive adsorbent with a superior uptake capacity compared with some of those previously reported in the literatures. The adsorptIon tests in the presence of interfering Ions (Na+, K+ and Cs+) showed that the more the added amount of the different types of interfering Ions, the more severe is the degree by which the adsorptIon of Rb+ is weakened. In additIon, the Rb+ sorptIon selectivity was moderately influenced by the co-Ion effect in the presence of any Ions (K+, Na+ and Cs+) due to PTA doping. In a word, due to its relatively facile preparatIon process and good uptake capacity, PTA@FMC might be a promising adsorptIon material for Rb+.
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Highly efficient capture of Rubidium Ion by a novel HS-Fe3O4@MIL-53(Al) composite material
Polyhedron, 2019Co-Authors: Ning Tian, Qing Liu, Yifang Dai, Wei DaiAbstract:Abstract A general synthetic strategy for HS-Fe3O4@MIL-53(Al) adsorbent has been developed in this work. The composite material exhibits an efficient capture performance for Rubidium Ion due to sulfhydryl group and magnetic Fe3O4 doped in its porous cavity. The results of X-ray diffractIon, scanning electron microscopy, Fourier transform infrared spectroscopy, and N2 adsorptIon–desorptIon proved that the HS-Fe3O4 was immobilized in the composite material. High Rb+ uptake capacity over the HS-Fe3O4@MIL-53(Al) is attributed to the exchange of acidic protons between the sulfhydryl group and the Rb+. The pseudo-second-order and Freundlich model could make a good descriptIon of the adsorptIon process. The Rb+ sorptIon selectivity was moderately influenced by any co-Ions effect (K+, Na+ and Cs+) due to HS-Fe3O4 doped. These results reveal that our novel composite material might be a promising industrial adsorbent for Rb+ capture.
E.j.d. Vredenbregt - One of the best experts on this subject based on the ideXlab platform.
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measurements of the energy distributIon of a high brightness Rubidium Ion beam
Ultramicroscopy, 2018Co-Authors: Ten G Haaf, S.h.w. Wouters, D. F. J. Nijhof, P. H. A. Mutsaers, E.j.d. VredenbregtAbstract:Abstract The energy distributIon of a high brightness Rubidium Ion beam, which is intended to be used as the source for a focused Ion beam instrument, is measured with a retarding field analyzer. The Ions are created from a laser-cooled and compressed atomic beam by two-step photoIonizatIon in which the IonizatIon laser power is enhanced in a build-up cavity. Particle tracing simulatIons are performed to ensure the analyzer is able to resolve the distributIon. The lowest achieved full width 50% energy spread is (0.205 ± 0.006) eV, which is measured at a beam current of 9 pA. The energy spread originates from the variatIon in the IonizatIon positIon of the Ions which are created inside an extractIon electric field. This extractIon field is essential to limit disorder-induced heating which can decrease the Ion beam brightness. The IonizatIon positIon distributIon is limited by a tightly focused excitatIon laser beam. Energy distributIons are measured for various IonizatIon and excitatIon laser intensities and compared with calculatIons based on numerical solutIons of the optical Bloch equatIons including IonizatIon. A good agreement is found between measurements and calculatIons.
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Measurements of the energy distributIon of an ultracold Rubidium Ion beam
arXiv: Atomic Physics, 2017Co-Authors: G. Ten Haaf, S.h.w. Wouters, D. F. J. Nijhof, P. H. A. Mutsaers, E.j.d. VredenbregtAbstract:The energy distributIon of an ultracold Rubidium Ion beam, which is intended to be used as the source for a focused Ion beam instrument, is measured with a retarding field analyzer. The Ions are created from a laser-cooled and compressed atomic beam by two-step photoIonizatIon in which the IonizatIon laser power is enhanced in a build-up cavity. Particle tracing simulatIons are performed to ensure the analyzer is able to resolve the distributIon. The lowest achieved full width 50% energy spread is $\left(0.205\pm0.006\right)$ eV. The energy spread originates from the variatIon in the IonizatIon positIon of the Ions which are created inside an extractIon electric field. This extractIon field is essential to limit disorder-induced heating which can decrease the Ion beam brightness. The IonizatIon positIon distributIon is limited by a tightly focused excitatIon laser beam. Energy distributIons are measured for various IonizatIon and excitatIon laser intensities and compared with calculatIons based on numerical solutIons of the optical Bloch equatIons including IonizatIon. A good agreement is found between measurements and calculatIons.
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Measurement of the temperature of an ultracold Ion source using time-dependent electric fields
Journal of Applied Physics, 2011Co-Authors: N. Debernardi, M.p. Reijnders, W.j. Engelen, T. T. J. Clevis, Peter H. A. Mutsaers, O.j. Luiten, E.j.d. VredenbregtAbstract:We report on a measurement of the characteristic temperature of an ultracold Rubidium Ion source, in which a cloud of laser-cooled atoms is converted to Ions by photo-IonizatIon. Extracted Ion pulses are focused on a detector with a pulsed-field technique. The resulting experimental spot sizes are compared to particle-tracking simulatIons, from which an effective source temperature T = (3 ± 2) mK and the corresponding transversal reduced emittance er = 1.4 × 10−8 m rad eV are determined. Space charge effects that may affect the measurement are also discussed.
B. D. Antonov - One of the best experts on this subject based on the ideXlab platform.
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Rubidium Ion conducting Rb2 − 2xAl2 − xAxO4 (A = Nb, Ta) solid electrolytes
Inorganic Materials, 2010Co-Authors: G. Sh. Shekhtman, E. I. Volegova, E. I. Burmakin, B. D. AntonovAbstract:Rb2 − 2x Al2 − x A x O4 (A = Nb, Ta) solid solutIons have been synthesized, and their conductivity has been measured as a functIon of temperature and compositIon. The highest Rubidium Ion conductivity in the Rb2 − 2x Al2 − x A x O4 solid solutIons is 3.16 × 10−3 S/cm at 300°C and ∼ 2 × 10−2 S/cm at 700°C. The high Rubidium Ion conductivity of the synthesized solid electrolytes is mainly due to the formatIon of Rubidium vacancies when Nb5+ or Ta5+ substitutes for Al3+ and to the specific features of the crystal structure of RbAlO2.
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Rubidium Ion conducting rb2 2xal2 xaxo4 a nb ta solid electrolytes
Inorganic Materials, 2010Co-Authors: Sh G Shekhtman, E. I. Volegova, E. I. Burmakin, B. D. AntonovAbstract:Rb2 − 2x Al2 − x A x O4 (A = Nb, Ta) solid solutIons have been synthesized, and their conductivity has been measured as a functIon of temperature and compositIon. The highest Rubidium Ion conductivity in the Rb2 − 2x Al2 − x A x O4 solid solutIons is 3.16 × 10−3 S/cm at 300°C and ∼ 2 × 10−2 S/cm at 700°C. The high Rubidium Ion conductivity of the synthesized solid electrolytes is mainly due to the formatIon of Rubidium vacancies when Nb5+ or Ta5+ substitutes for Al3+ and to the specific features of the crystal structure of RbAlO2.
Guihua Zhao - One of the best experts on this subject based on the ideXlab platform.
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Rubidium Ion Capture with a phosphotungstic acid-functIonalized finger-citron-residue-based carbon
RSC Advances, 2019Co-Authors: Qing Liu, Guihua Zhao, Yifang Dai, Wei DaiAbstract:To solve the contradictIon of diffusIon and selectivity, we reported a novel finger-citron-residue-based mesoporous carbon (FMC) as a support to prepare a novel adsorbent PTA@FMC (PTA represents phosphotungstic acid) for Rubidium Ion capture. This new adsorbent was characterized by X-ray diffractIon, thermogravimetric analysis, scanning electron microscopy, Fourier transform infrared spectroscopy, and N2 adsorptIon, and the results showed that the PTA was immobilized in the FMC structure. Based on the results of batch tests, we demonstrated that PTA@FMC is the most distinctive adsorbent with a superior uptake capacity compared with some of those previously reported in the literatures. The adsorptIon tests in the presence of interfering Ions (Na+, K+ and Cs+) showed that the more the added amount of the different types of interfering Ions, the more severe is the degree by which the adsorptIon of Rb+ is weakened. In additIon, the Rb+ sorptIon selectivity was moderately influenced by the co-Ion effect in the presence of any Ions (K+, Na+ and Cs+) due to PTA doping. In a word, due to its relatively facile preparatIon process and good uptake capacity, PTA@FMC might be a promising adsorptIon material for Rb+.
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Rubidium Ion capture with composite adsorbent pma hkust 1
Journal of The Taiwan Institute of Chemical Engineers, 2018Co-Authors: Wei Dai, Yaoyao Fang, Guihua Zhao, Xiaoying YanAbstract:Abstract We first synthesized a series of phosphomolybdic acid (PMA) promoted HKUST-1 composite adsorbents and investigated their selective adsorptIon features for Rubidium Ion (Rb+) from model salt lakes. The physiochemical properties of these ad-synthesized materials were analyzed using XRD, thermos gravimetric analysis, scanning electron microscopy, transform infrared spectra, and N2 adsorptIon, which proved that the PMA was immobilized in the structure of HKUST-1. Batch tests showed that the composite material was able to bind Rb+ Ions with strong chemical affinity and exhibited high Rb+ uptake capacities, which is superior to those reported in previous literatures. The pseudo-second-order model can make a good descriptIon of the adsorptIon kinetics, while Freundlich model could well express the adsorptIon isotherms. The Rb+ uptake mechanism could be mainly attributed to Lewis acid–base interactIon between the adsorbents and Rb+ molecules. In additIon, the Rb+ sorptIon selectivity was moderately influenced by any co-Ion effect (K+, Na+ and Cs+) due to PMA doping. These studies reveal that our novel composite material might be a promising adsorbent for Rb+ adsorptIon.
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Rubidium Ion capture with composite adsorbent PMA@HKUST-1
Journal of the Taiwan Institute of Chemical Engineers, 2018Co-Authors: Wei Dai, Yaoyao Fang, Guihua Zhao, Xiaoying YanAbstract:Abstract We first synthesized a series of phosphomolybdic acid (PMA) promoted HKUST-1 composite adsorbents and investigated their selective adsorptIon features for Rubidium Ion (Rb+) from model salt lakes. The physiochemical properties of these ad-synthesized materials were analyzed using XRD, thermos gravimetric analysis, scanning electron microscopy, transform infrared spectra, and N2 adsorptIon, which proved that the PMA was immobilized in the structure of HKUST-1. Batch tests showed that the composite material was able to bind Rb+ Ions with strong chemical affinity and exhibited high Rb+ uptake capacities, which is superior to those reported in previous literatures. The pseudo-second-order model can make a good descriptIon of the adsorptIon kinetics, while Freundlich model could well express the adsorptIon isotherms. The Rb+ uptake mechanism could be mainly attributed to Lewis acid–base interactIon between the adsorbents and Rb+ molecules. In additIon, the Rb+ sorptIon selectivity was moderately influenced by any co-Ion effect (K+, Na+ and Cs+) due to PMA doping. These studies reveal that our novel composite material might be a promising adsorbent for Rb+ adsorptIon.
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enhanced adsorptIon of Rubidium Ion by a phenol mil 101 cr composite material
Microporous and Mesoporous Materials, 2017Co-Authors: Yaoyao Fang, Guihua Zhao, Wei DaiAbstract:Abstract A novel composite adsorbent, phenol@MIL-101(Cr), was prepared using MIL-101(Cr) functIonalized with different amount of phenol via an impregnatIon technique. These new composite adsorbents were characterized by X-ray diffractIon, thermogravimetric analysis, scanning electron microscopy, Fourier transform infrared spectroscopy, and N 2 adsorptIon and the results showed that the phenol was immobilized in the MIL-101(Cr) structure. The adsorptIon performance of the composite for Rubidium Ions from aqueous solutIons was evaluated by batch tests and using a fixed-bed breakthrough column at room temperature (25 °C). The phenol@MIL-101(Cr) exhibited high Rb + uptake capacities, which are superior to all those previously reported in the literature. This excellent capacity is attributed to the exchange of acidic protons between the phenol groups and the Rubidium Ions. The saturated adsorbents were easily regenerated by washing with an ammonium nitrate solutIon. After regeneratIon, more than 90% of the Rubidium Ion capacity was maintained. Based on these results, MIL-101(Cr) modified by phenol should be a promising adsorbent for the separatIon and purificatIon of Rubidium Ions from salt lakes.
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Enhanced adsorptIon of Rubidium Ion by a phenol@MIL-101(Cr) composite material
Microporous and Mesoporous Materials, 2017Co-Authors: Yaoyao Fang, Guihua Zhao, Wei DaiAbstract:Abstract A novel composite adsorbent, phenol@MIL-101(Cr), was prepared using MIL-101(Cr) functIonalized with different amount of phenol via an impregnatIon technique. These new composite adsorbents were characterized by X-ray diffractIon, thermogravimetric analysis, scanning electron microscopy, Fourier transform infrared spectroscopy, and N 2 adsorptIon and the results showed that the phenol was immobilized in the MIL-101(Cr) structure. The adsorptIon performance of the composite for Rubidium Ions from aqueous solutIons was evaluated by batch tests and using a fixed-bed breakthrough column at room temperature (25 °C). The phenol@MIL-101(Cr) exhibited high Rb + uptake capacities, which are superior to all those previously reported in the literature. This excellent capacity is attributed to the exchange of acidic protons between the phenol groups and the Rubidium Ions. The saturated adsorbents were easily regenerated by washing with an ammonium nitrate solutIon. After regeneratIon, more than 90% of the Rubidium Ion capacity was maintained. Based on these results, MIL-101(Cr) modified by phenol should be a promising adsorbent for the separatIon and purificatIon of Rubidium Ions from salt lakes.
Xiaoying Yan - One of the best experts on this subject based on the ideXlab platform.
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Rubidium Ion capture with composite adsorbent pma hkust 1
Journal of The Taiwan Institute of Chemical Engineers, 2018Co-Authors: Wei Dai, Yaoyao Fang, Guihua Zhao, Xiaoying YanAbstract:Abstract We first synthesized a series of phosphomolybdic acid (PMA) promoted HKUST-1 composite adsorbents and investigated their selective adsorptIon features for Rubidium Ion (Rb+) from model salt lakes. The physiochemical properties of these ad-synthesized materials were analyzed using XRD, thermos gravimetric analysis, scanning electron microscopy, transform infrared spectra, and N2 adsorptIon, which proved that the PMA was immobilized in the structure of HKUST-1. Batch tests showed that the composite material was able to bind Rb+ Ions with strong chemical affinity and exhibited high Rb+ uptake capacities, which is superior to those reported in previous literatures. The pseudo-second-order model can make a good descriptIon of the adsorptIon kinetics, while Freundlich model could well express the adsorptIon isotherms. The Rb+ uptake mechanism could be mainly attributed to Lewis acid–base interactIon between the adsorbents and Rb+ molecules. In additIon, the Rb+ sorptIon selectivity was moderately influenced by any co-Ion effect (K+, Na+ and Cs+) due to PMA doping. These studies reveal that our novel composite material might be a promising adsorbent for Rb+ adsorptIon.
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Rubidium Ion capture with composite adsorbent PMA@HKUST-1
Journal of the Taiwan Institute of Chemical Engineers, 2018Co-Authors: Wei Dai, Yaoyao Fang, Guihua Zhao, Xiaoying YanAbstract:Abstract We first synthesized a series of phosphomolybdic acid (PMA) promoted HKUST-1 composite adsorbents and investigated their selective adsorptIon features for Rubidium Ion (Rb+) from model salt lakes. The physiochemical properties of these ad-synthesized materials were analyzed using XRD, thermos gravimetric analysis, scanning electron microscopy, transform infrared spectra, and N2 adsorptIon, which proved that the PMA was immobilized in the structure of HKUST-1. Batch tests showed that the composite material was able to bind Rb+ Ions with strong chemical affinity and exhibited high Rb+ uptake capacities, which is superior to those reported in previous literatures. The pseudo-second-order model can make a good descriptIon of the adsorptIon kinetics, while Freundlich model could well express the adsorptIon isotherms. The Rb+ uptake mechanism could be mainly attributed to Lewis acid–base interactIon between the adsorbents and Rb+ molecules. In additIon, the Rb+ sorptIon selectivity was moderately influenced by any co-Ion effect (K+, Na+ and Cs+) due to PMA doping. These studies reveal that our novel composite material might be a promising adsorbent for Rb+ adsorptIon.
