Particuology
·
2024
·
IF 4.1
Yan Li,Heng Lin,Qiaolan Yu,Na Ma,Wei Dai
The adsorption performances of individual adsorbent such as UiO-66-NH 2 and MgAl-layered double hydroxides (MgAl-LDH) toward levofloxacin (LVX) is less satisfactory due to the disappointing uptake capacity and adsorption efficiency. Herein, a 3D flower-like composite adsorbent prepared via iterative hydrothermal synthesis method anchoring UiO-66-NH 2 nanoparticles onto the MgAl-LDH surface. Attributed to the synergistic effects of UiO-66-NH 2 , and MgAl-LDH, the MgAl-LDH@UiO-66-NH 2 exhibits an outstanding adsorption performance toward LVX. Typically, the maximum LVX uptake capacity over MgAl-LDH@UiO-66-NH 2 reached 268 mg/g, which was higher than that of the individual adsorption materials UiO-66-NH 2 (41 mg/g), MgAl-LDH (140 mg/g), and some adsorbents reported in previous literature. The rapid adsorption process can reach equilibrium within 20 min, which conformed well to the pseudo-second-order kinetics and the Langmuir isotherm model. Adsorption thermodynamic result also indicated that the adsorption was spontaneous and exothermic, simultaneous coexisting physical and chemical adsorption interactions. Importantly, the MgAl-LDH@UiO-66-NH 2 still maintained excellent adsorption capacity with a slightly decrease after fifth cycle, exhibiting a remarkable reuse and stable performances. This work provides a highly novel strategy to prepare recyclable composite adsorbent for the LVX capture from aqueous solution.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Caiqin Chen,Dezhi Chen,Shasha Xie,Hongying Quan,Xubiao Luo,Lin Guo
Herein, we studied the adsorption behaviors of organic micropollutants, such as anticonvulsant carbamazepine (CBZ) and antibiotic tetracycline hydrochloride (TC), on zirconium metal–organic framework UiO-66 in water. The maximum adsorption capacities of CBZ and TC on the UiO-66 were 37.2 and 23.1 mg·g–1 at 25 °C, respectively. The adsorption isotherms and kinetics of CBZ and TC were well described by using the Langmuir model and pseudo-second-order model, respectively, and the adsorptions on UiO-66 are endothermic reactions. The adsorption capacities of CBZ and TC on UiO-66 were decreased with the increase of solution pH. The presence of humic acid could improve the adsorption of CBZ and TC on UiO-66, but K+ ion inhibited their adsorption obviously. In addition, Ca2+ and Al3+ ions also suppressed the adsorption of TC on UiO-66. The competitive adsorption suggested that the adsorption sites for CBZ on UiO-66 were different from those for TC. The surface interactions between UiO-66 and the two micropollutants were demonstrated by powder X-ray diffraction, Fourier transform infrared (FT-IR) spectra, scanning electron microscopy, nitrogen adsorption/desorption isotherms, and X-ray photoelectron (XPS) spectra. The characterizations showed that the adsorption of CBZ on UiO-66 is mainly a physisorption, and the hydrophobic effect played a crucial role during the adsorption of CBZ; meanwhile weak π–π electron donor–acceptor interaction and electrostatic attraction also existed. However, the adsorption of TC on UiO-66 is mainly a chemisorption; in addition to the strong electrostatic attraction and π–π electron donor–acceptor interaction forces, the nitrogenous groups of TC played an important role, which can replace the carboxylic groups coordinated with Zr–O clusters. The obtained results will aid us to comprehend the surface interaction between organic micropollutants and UiO-66 and expand the application of UiO-66 as sorbent for removal of pollutants from water.
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高影响因子
Advanced Sensor Research
·
2023
·Vol. 2
·期 5
·2200014
·
IF 0
Yangwei Li,Jing Qian,Yuanyuan Zhang,Ting Zeng,Qijin Wan,Nianjun Yang
In this study, metal–organic framework (MOF) nanoparticles of UiO-66 are integrated with expanded graphite (EG) (UiO-66/EG) by a facile solvothermal approach. The advantages of this nanocomposite UiO-66/EG overcome the poor electronic conductivity and slow diffusion of MOFs for their electrochemical applications. Through electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and electrochemical techniques, the morphology, surface area, and physicochemical properties of this UiO-66/EG nanocomposite are characterized. The UiO-66/EG nanocomposite exhibits superior sensing performance over the UiO-66 and EG when used for nitrite and L-cysteine determination. This includes less positive oxidation potentials and enhanced oxidation currents. Using the UiO-66/EG nanocomposite, the nitrite oxidation peak current is linear with a concentration range of 0.20 μ m to 13.15 m m with the lowest limit of detection (LOD) of 0.06 μ m ( S / N = 3). Meanwhile, superior performance is demonstrated for L-cysteine monitoring, where the oxidation peak current is linear over the L-cysteine concentration in the range of 0.5–250 μ m and of 0.25–3.50 m m and a LOD of 0.28 μ m ( S / N = 3). This UiO-66/EG/GCE nanocomposite is successfully exploited to detect nitrite in food samples and to measure L-cysteine in juice samples. Therefore, the proposed sensing platform enables the fabrication of high-performance electrochemical sensors to accurately quantify nitrite and L-cysteine in complex matrixes.
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DOI
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
·
2019
·Vol. 92
·期 6
·1047-1052
·
IF 4.431
Jiang Jifei,Zhu Qiong,Guo Yu,Cheng Lin,Lou Yongbing,Chen Jinxi
Photocatalytic hydrogen production is an effective strategy for meeting energy challenges. Here, a composite for photocatalytic hydrogen production via introduction of UiO-66 nanospheres into flower-shaped ZnIn2S4 microspheres (ZIS/U6) is described. The optimum composite with 20 mg UiO-66 loading displayed the high photocatalytic rate of 1860.9 µmol g−1 h−1 with an apparent quantum efficiency of 1.4% at 420 nm under visible-light irradiation, which is nearly 3 times higher than that of ZnIn2S4. The improved photocatalytic H2 rate mainly benefited from effective electron transfer between ZnIn2S4 and UiO-66. Additionally, we tried to introduce UiO-66-NH2 and UiO-66-(SH)2 with excellent visible light absorption into ZnIn2S4 to obtain composites. Surprisingly, they did not exhibit better photocatalytic hydrogen production rates. Combined with the electrochemical test results, it was found that they had completely different electron transfer paths from ZIS/U6. Therefore, a different photocatalytic mechanism was proposed and further verified by transient photocurrent.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Haipeng Zhu,Renhao Li,Guozhen Liu,Yang Pan,Jiahui Li,Zhenggang Wang,Yanan Guo,Gongping Liu,Wanqin Jin
Pervaporation shows great potential in separation of organic-organic mixtures that are widely involved in chemical and petrochemical industries, while the separation performance of polymeric membranes is undesirable for practical application. In this work, we incorporated UiO-66 (ZrCl 4 ) metal-organic frameworks (MOFs) into chitosan (CS) membrane to separate methanol-dimethyl carbonate (DMC) mixtures. ZrOCl 2 ·8H 2 O or ZrCl 4 was selected as metal precursor to synthesize UiO-66, which aimed to investigate the structural defect of UiO-66 for the separation performance of mixed matrix membranes (MMMs). BET, 1 H NMR and low-angle XRD characterizations indicated that UiO-66 (ZrCl 4 ) with appropriate pore size is more suitable for preferentially permeate methanol over DMC. IR, dielectric relaxation and DSC characterizations combined with molecular simulations revealed the ideal interfacial morphology of UiO-66/CS MMMs was owing to the favorable molecular interactions including hydrogen bond interaction and van der Waals interaction. Pervaporation separation of methanol-DMC mixtures demonstrated that UiO-66 (ZrCl 4 ) nanofillers can simultaneously enhance the permeation flux and separation factor of CS membrane. The optimized 10 wt% UiO-66 (ZrCl 4 )/CS MMM exhibited total flux and methanol/DMC separation factor of 355 g/m 2 h and 337 for 10 wt% methanol-DMC mixtures at 50 °C, which were 3.4-fold and 25-fold higher than that of the pure CS membrane, respectively, and outperformed the state-of-the-arts polymer-based membranes.
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yiyang Bi,Xin Wang,Ke Li,Chengqian Wang,Yu Zhang,Qun Liu
A reasonable introduction of MOFs-derived Ni 2 P with high dispersion is a valid way to reduce the recombination rate of photogenerated electron holes , thus enabling more effective visible light-driven water splitting. Herein, the MOF-on-MOF strategy was used to prepare Ni 2 P@UiO-66-NH 2 by in situ growth of Ni-MOF on UiO-66-NH 2 followed by vapor-phase phosphating, and the composite photocatalyst of CdS/Ni 2 P@UiO-66-NH 2 was obtained by a facile ultrasound method in solvent. UiO-66-NH 2 provides the growth site for Ni-MOF, enabling uniform dispersion of Ni 2 P and the firmly anchoring of CdS. By adjusting the proportion of Ni 2 P@UiO-66-NH 2 , the light absorption capacity and photocatalytic activity can be further optimized. The hydrogen production efficiency of CdS/Ni 2 P@UiO-66-NH 2 can reach up to 2103 µmol·g −1 ·h −1 , which is about 7 times higher than that of pure CdS. The improvement of the photocatalytic performance of CdS/Ni 2 P@UiO-66-NH 2 composites can be mainly ascribed to the increased active sites exposure, well dispersion of CdS, and the creation of multiple heterojunctions , which tune the band gap, broaden the visible light absorption, and facilitate the carrier separation. This work offers an efficient synthetic strategy for creating ternary composites with remarkable catalytic activity and high stability for hydrogen evolution .
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Pengfei Yang,Xiaozhe Hu,Jin Zhou,Haixiang Li,Asfandyar Shahab,Liangquan Lu,Hua Zhang
Given the severe threat posed by heavy metal pollution to both the ecological environment and human health, the development of green, efficient and sustainable adsorbents has become a major research focus. Herein, a novel heavy metal ions adsorbent (De-UiO-66-IDSA) was synthesized by functionalizing defect UiO-66 with the biodegradable chelating agent iminodisuccinic acid (IDSA). The effects of different factors on the adsorption of Pb 2+ , Cu 2+ and Cd 2+ by UiO-66-IDSA were investigated, including IDSA loading, contact time, adsorbent dosage and pH. Batch adsorption experiments showed that the adsorption kinetics followed PSO model, while the isotherm data were best described by the Langmuir model, indicating a monolayer chemisorption process. The maximum adsorption capacities for Pb 2+ , Cu 2+ and Cd 2+ were 377.40, 163.60, and 204.10 mg/g at 298 K, respectively and the adsorption was spontaneous and endothermic. Moreover, regeneration experiments demonstrated that the adsorbent retained over 75 % of its removal efficiency for all three metal ions after 5 cycles. These results highlight the great potential of De-UiO-66-IDSA as a green, high-performance, and a regenerable adsorbent capable of effectively eliminating heavy metal ions from aqueous media.
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产品关联
DOI
高影响因子
ACS Omega
·
2025
·
IF 4.3
Tao Shen,Guodong Wu,Li Yin,Tianen Chen,JiYe Fan,Yuanhao Wang,Shifeng Wang
Developing efficient adsorbents for removal of organic pollutants and heavy metals is essential for environmental protection. In this study, a series of GO/UiO-66-(OH)2 composites were synthesized and characterized using XRD, FT-IR, and SEM, confirming enhanced thermal stability, reduced aggregation, and maintained crystallinity of UiO-66-(OH)2 due to GO incorporation. Batch adsorption experiments showed that GO increased the adsorption capacity, with GO-8/UiO-66-(OH)2 achieving 324.2 mg/g for diclofenac sodium (DCF) and 429.3 mg/g for Hg2+. DCF adsorption was primarily governed by physisorption, while Hg adsorption was chemisorptive, involving strong coordination with oxygen functional groups. Kinetic and isotherm studies revealed the suitability of the pseudo-second-order and Freundlich models, with thermodynamic analysis showing exothermic DCF adsorption and endothermic Hg2+ adsorption. The composites also exhibited high selectivity and stable regeneration, making them promising candidates for practical environmental remediation.
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产品关联
DOI
PubMed
高影响因子
FUEL
·
2020
·
IF 5.578
Songjian Zhao,Wenjun Huang,Jiangkun Xie,Wei liu,Zan Qu,Naiqiang Yan
UiO-66-type metal-organic frameworks (MOF) grafted with organic functionalities (–Br, –NO 2 and –NH 2 ) are introduced to investigate the elemental mercury (Hg 0 ) removal from flue gas, and the effect for adding linkers on Hg 0 removal is discussed. Results indicated that added functional groups did not alter the original topology of adsorbents, although their size and morphology varied. Adding –NH 2 and –NO 2 functional groups was detrimental for the thermal stability of UiO-66 except for -Br functional group, and grafted -Br itself was also stable. The Hg 0 removal ability of UiO-66 was not significantly changed by grafting –NH 2 and –NO 2 . The grafted -Br was beneficial for Hg 0 capture, and the Hg 0 removal performance of UiO-66-Br increased with increasing oxygen content and temperature. Furthermore, the mechanism of Hg 0 capture was studied.
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高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Dongdong Liu,Shun-xin Chen,Runkai Wang,Lin Li,Jiangyan Ji,Tong Wu,Kunlin Ke,Fei Chai
Enrofloxacin (ENR), characterized by its remarkable stability and resistance to degradation, has become a significant contaminant in aquatic ecosystems. In this study, a CNC/UiO-66(Fe) composite was synthesized via a one-step hydrothermal method, and response surface methodology (RSM) was employed to optimize the key experimental conditions for the efficient removal of ENR from aqueous solutions. The incorporation of cellulose nanocrystals (CNC) improved the dispersibility and stability of UiO-66, and significantly enhanced the crystallinity of the material, as confirmed by XRD analysis. Iron (Fe) doping introduced additional active sites and defects, synergistically enhancing the overall adsorption capacity. The composite exhibited a high BET surface area of 1294.81 m 2 /g and a well-developed porous structure. The adsorption process was spontaneous and exothermic, fitting well with both the pseudo-second-order kinetic model and the Langmuir isotherm model. Under alkaline conditions, the material showed excellent adsorption performance, with a theoretical maximum adsorption capacity of 275.84 mg/g for ENR at 25°C and pH 10. The adsorption mechanism involved multiple synergistic interactions, including electrostatic attraction, hydrogen bonding, π-π stacking, metal coordination, and pore filling. Furthermore, CNC/UiO-66(Fe) exhibited excellent stability and reusability, retaining over 80% of its removal efficiency after five cycles. This study provides an effective and sustainable approach for remediating antibiotic contaminants in aquatic environments.
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xiaolei Cui,Yuchen Cui,Ziang Li,Zixi Kang,Soryong Ryan Chae,Lubomira Tosheva,Hailing Guo
Under industrially conditions (pressures ≥10 bar), polymer membranes usually exhibit poor CO 2 /CH 4 separation performance and limited stability, severely restricting their practical application. Here, we present a materials engineering strategy, in which phenolic resin is in-situ polymerized on the surface of NH 2 -UiO-66 to engineer the MOF-polymer interface, thereby enabling high CO 2 /CH 4 separation performance and excellent structural stability for mixed matrix membranes. The phenolic resin forms a uniform coating (∼10 nm thick) on the porous MOF surface, providing a high-density CO 2 active sites that accelerate CO 2 transport. In addition, due to favorable interfacial interactions between the phenolic resin shell and the polyetherimide matrix, the resulting MMMs exhibit excellent stability under high pressures. Compared to the pristine PEI membranes, the CO 2 permeability and CO 2 /CH 4 selectivity of the optimized 30-RF@NH 2 -UiO-66-PEI membranes are enhanced by 8550% and 1500%, respectively. Under simulated industrial conditions (10/90 CO 2 /CH 4 mixture at 10 bar and 50 °C), the engineered membranes maintain a CO 2 permeability of 6105 Barrer and a CO 2 /CH 4 selectivity of 30.5, demonstrating excellent separation performance. More importantly, the 30-RF@NH 2 -UiO-66-PEI membrane exhibits both scalability (readily extendable to the square-meter level) and cost-effectiveness (∼55 USD per square meter). This work highlights the potential of phenolic resin-modified MOF fillers to enable efficient CO 2 /CH 4 separation under realistic industrial conditions.
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Dandan Xu,Bing Zhao,Qinglong Luo,Xiao Du,Xiaogang Hao,Zhong Liu
It is a meaningful study to develop adsorbents with high adsorption capacity and fast adsorption rate for the removal of specific ions in aqueous solution. This paper mainly studies the removal of boron in aqueous solution by UiO-66. Regular octahedral structured UiO-66(HAC) via acetic acid-promoted was synthesized by a hydrothermal method. The boron adsorption kinetics, isotherms, thermodynamics, mechanism, and recycling on UiO-66(HAC) were further investigated in batch adsorption process, which found that adsorption capacity of UiO-66(HAC) is enhanced by 40% compared with UiO-66. UiO-66(HAC) exhibits great adsorption performance of 79.43 mg·g −1 at 25 °C and the adsorption process reaches equilibrium rapidly in 2 h. The selective adsorption of boron by UiO-66(HAC) is due to the presence of a large amount of Zr-OH which can chemically adsorb with boron. Compared with traditional boron removal adsorbents, UiO-66(HAC) has higher boron adsorption capacity and is easy to regenerate. It is a promising boron removal adsorbent in aqueous solution.
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高影响因子
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