EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
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2016
·Vol. 2017
·期 1
·172-178
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IF 2.686
Gui-lin Zhuang,Jia-qi Bai,Xiang Zhou,Yi-fen Gao,Hong-liang Huang,Hai-quan Cui,Xing Zhong,Chong-Li Zhong,Jian-guo Wang
Graphical The effects of metal–organic framework (MOF) supports on catalytic activity were uncovered for highly dispersed Pt nanoparticles (NPs) loaded in UiO-67. Investigations of the effects of the support on catalytic properties are important for heterogeneous systems. Herein, we report the preparation of highly dispersed Pt nanoparticles (NPs) in three isomorphous UiO-67-type metal–organic frameworks (MOFs), namely, pristine UiO-67, N-UiO-67, and NH 2 -UiO-67. Structural measurements revealed that the sizes of the Pt NPs were 4.5 nm for Pt/UiO-67 and 2.5 nm for N-UiO-67 and NH 2 -UiO-67. The dominant influences on the sizes of the Pt NPs are the functional groups of the support and the pore size of the MOF. Furthermore, CO catalytic oxidations were performed as a model reaction. Interestingly, the catalytic performance sequence is 5 % Pt/N-UiO-67 > 5 % Pt/UiO-67 > 5 % Pt/NH 2 -UiO-67. A combination of experimental measurement and DFT calculation revealed that the catalytic properties depend on not only the size of the Pt NPs but also the nature of the support.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2023
·
IF 1.6
Peng Ying,Zhang Xiaowen,Zhang Yu,Zhou Chaochao,Wu Xiaoyan,Li Mi,Hua Yilong
Based on the stable Zr 6 O 4 (OH) 4 metal clusters, UiO-67 was first applied to the adsorption of U(VI), and its stability and adsorption performance for U(VI) were compared with UiO-66. As the organic ligand was lengthened, UiO-67 had a larger specific surface area and pore volume than UiO-66. The adsorption capacity of UiO-67 for uranium was 1.68 times that of UiO-66 under the same conditions. The chemical stability of UiO series decreased with the extension of organic ligands; for example, the crystalline structure of UiO-67 disintegrated in methanol, ethanol and water. Through the infrared spectra, adsorption isotherms and kinetics fitting, it is concluded that the carboxyl groups of UiO-67 participated in the chemisorption of U(VI), and uranyl ions adsorbed on UiO-67 were not desorbed with the collapse of UiO-67 crystal. This work represents the extension of organic chains reduces the chemical stability of MOFs but improves the adsorption performance of U(VI), which may be applied to predict the structural stability and adsorption capacity of other MOFs containing aromatic dicarboxylate organic linkers.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 18
·10009-10016
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IF 2.936
Zichen Xu,Guoying Zhao,Latif Ullah,Meng Wang,Aoyun Wang,Yanqiang Zhang,Suojiang Zhang
A facile strategy for the synthesis of acidic ionic liquid based UiO-67 type MOFs was developed in this study. Brønsted acids (H2SO4, CF3SO3H and hifpOSO3H (hexafluoroisopropyl sulfuric acid)) were introduced into UiO-67–bpy (bpy = 2,2′-bipyridine-5,5′-dicarboxylic acid) frameworks by reacting with bipyridyl nitrogen to introduce the properties of an acidic ionic liquid into the frameworks. The prepared catalysts, denoted as UiO-67–HSO4, UiO-67–CF3SO3 and UiO-67–hifpOSO3, were characterized by XRD, SEM, FT-IR, EA, TGA and N2 adsorption–desorption studies. The relatively high surface area was still maintained and acidic active groups were uniformly dispersed in the frameworks. The catalytic performance of UiO-67–HSO4, UiO-67–CF3SO3 and UiO-67–hifpOSO3 was evaluated by the esterification of acetic acid with isooctyl alcohol. The prepared catalysts showed good catalytic activities in the esterification, of which UiO-67–CF3SO3 gave the maximum isooctyl alcohol conversion of 98.6% under optimized conditions. The catalyst could be reused five times without a significant decrease in the conversion of isooctyl alcohol, and almost no active species were leached, indicating the excellent stability and reusability of the catalyst. Our study provides one effective way to synthesize heterogeneous acidic ionic liquid catalysts consisting of isolated, well defined acidic groups that will probably attract interest in acid catalyst chemistry.
研究领域:
材料化学
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催化化学
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DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Song He,Junqing Zhu,Hongliang Sheng,Jiayi Tang,Tao He,Jinfeng Ji,Yajun Huang
The existence of TC residues in the environment and the resultant development of opposition mechanisms constitute a serious menace to both ecological systems and human health. In the present study, UiO-67-bpy-X gels were prepared by the introduction of H 2 bpydc ligands and acetic acid modifiers, followed by a systematic evaluation of their TC adsorption capabilities. Characterization results revealed that UiO-67-bpy-2.4 gel displayed raised specific surface area (1953 m 2 g −1 ) and a graded porous structure. When conditions were optimized, the material manifested a maximum TC adsorptive capacity of 404.1 mg g −1 , outperforming the performance of most reported adsorbents. The kinetic modeling and adsorption isotherm analyses implied that chemical adsorption constituted the dominant uptake pathway. The adsorptive mechanism was further analyzed by XPS, FT-IR, and DFT calculations, which can be attributed to the synergistic effects of metal coordination, electronic interaction, hydrogen bonding, and π-π interaction. Furthermore, the material exhibited good structural stability, retaining 85.945 % of its original adsorptive capacity after six cycles. These findings suggested that UiO-67-bpy-2.4 gel held significant promise as environmental remediation materials, offering high adsorptive capacity and ease of recycling, thereby presenting a novel approach to addressing TC contamination.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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DOI
PubMed
高影响因子
DALTON TRANSACTIONS
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2016
·Vol. 45
·期 20
·8614-8621
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IF 4.177
Lei Xu,Yanping Luo,Lin Sun,Shan Pu,Min Fang,Rong-Xing Yuan,Hong-Bin Du
A new UiO-67-type zirconium metal organic framework (MOF) material UiO-67-bpy-Me (bpy = 2,2-bipyridine-4,4′-dicarboxylic acid, Me = methyl) was prepared by N-quaternization of the pyridine sites in UiO-67-bpy. After N-quaternization, the pristine neutral framework turned cationic while its high thermal and chemical stabilities were primarily preserved. Fast and enhanced anionic dye adsorption was observed in UiO-67-bpy-Me. In addition, despite the decrease in surface area and pore volume, UiO-67-bpy-Me exhibited an evident increase in CO2 uptake compared to UiO-67-bpy. The enhancement was ascribed to the strong interactions between CO2 and the N-quaternized framework. More importantly, as the N-quaternization has changed the electronic structure of the organic linker. UiO-67-bpy-Me showed optical absorption up to ca. 800 nm with a large red shift of 450 nm compared to the pristine UiO-67-bpy (ca. 350 nm). The extended optical absorption may lead to more efficiency in light utilization. A proof-of-concept demonstration showed that UiO-67-bpy-Me could more efficiently catalyze methyl-orange degradation under UV-Vis light irradiation than the pristine UiO-67-bpy. These findings demonstrate that N-quaternization could serve as a facile post-synthetic modification method to tune the chemical/physical properties of free pyridyl-containing MOFs.
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
Small
·
2022
·Vol. 18
·期 23
·2200548
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IF 15.153
Meng-Meng Pan,Yu Ouyang,Yong-Li Song,Lu-Qin Si,Ming Jiang,Xu Yu,Li Xu,Itamar Willner
The synthesis and characterization of Au 3+ -modified UiO-67 metal-organic framework nanoparticles, Au 3+ -NMOFs, are described. The Au 3+ -NMOFs reveal dual oxidase-like and peroxidase-like activities and act as an active catalyst for the catalyzed generation of O 2 •− under aerobic conditions or •OH in the presence of H 2 O 2 . The two reactive oxygen species (ROS) agents O 2 •− and •OH are cooperatively formed by Au 3+ -NMOFs under aerobic conditions, and in the presence of H 2 O 2. The Au 3+ -NMOFs are applied as an effective catalyst for the generation ROS agents for antibacterial and wound healing applications. Effective antibacterial cell death and inhibition of cell proliferation of Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E . coli ) bacterial colonies are demonstrated in the presence of the Au 3+ -NMOFs. In addition, in vivo experiments demonstrate effective wound healing of mice wounds infected by S. aureus , treated by the Au 3+ -NMOFs.
研究领域:
材料科学
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生物医学工程
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微生物学
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DOI
PubMed
高影响因子
LANGMUIR
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2025
·
IF 3.9
Rui Cao,Xinxin Li,Zhihang He,Hanxiao Tang,Xiao-Ke Zheng,Zhijuan Zhang
The development of probes for the efficient detection of volatile organic compounds is crucial for both human health protection and environmental monitoring. In this study, we successfully synthesized a ratiometric fluorescent sensing material [Eu-UiO-67 (1:1)], featuring dual-emission fluorescence peaks via a one-pot method. This material demonstrated exceptional ratiometric fluorescence recognition properties for liquid styrene and isoprene, achieving low limit of detections (LODs) of 6.2 and 20.24 ppb, respectively. Furthermore, we leveraged its outstanding photoluminescence properties to fabricate a Eu-UiO-67 film, which exhibited distinctive fluorescence responses toward gaseous styrene and isoprene. This unique behavior resulted in LODs of 12.42 ppb for gaseous styrene and 15.39 ppb for gaseous isoprene. The investigation into the sensing mechanisms revealed that the fluorescence response for styrene was mediated by an internal filtration effect, which arose from the competitive energy absorption between styrene and the Eu-UiO-67 (1:1) material. In contrast, fluorescence resonance energy transfer occurred between isoprene and the Eu-UiO-67 (1:1) materials. This approach offers a sensitive and reliable method for the detection of liquid/gaseous styrene and isoprene.
研究领域:
材料科学
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环境科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
·
IF 16.683
Chun-Shuai Cao,Jingzhen Wang,Xiaoyong Yu,Yinqing Zhang,Lingyan Zhu
Bisphenol analogues have been widely used and displayed adverse effects on human beings. Although many photocatalysts displayed remarkable performance in degrading bisphenol A (BPA) or bisphenol F (BPF), it is not clear if they may also efficiently decompose other bisphenol analogues. In this study, Bi 5 O 7 I with satisfactory photocatalytic activity was doped with metal-organic framework (UiO-67) to build up Bi 5 O 7 I/UiO-67 heterojunctions. The heterojunction enhanced the charge mobility and separation of the electron-hole pairs, which was conducive for improving the photocatalytic activity. Consequently, 4:1-Bi 5 O 7 I/UiO-67 realized highly effective degradation of seven bisphenol analogues in one hour. Density functional theory (DFT) calculations uncovered that the reaction rate constant k displayed a positive correlation with the Hirshfeld charge q (N) of tertiary butyl carbon attached with different substituent groups. This provides a prospective heterojunction catalyst to degrade a group of pollutants with similar structures, and sheds light on the structural relationship of degradation efficiency.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Ping Tan,Zhen Mao,Yuhan Li,Jiayuan Yu,Liangjun Long
The construction of CN/UiO-67 (CNU) S-scheme heterojunction composites through in situ formation of UiO-67 on carbon nitride (C 3 N 4 ) helps to address the limitations of carbon nitride (CN) in photocatalytic NO elimination. The optimized CNU 3 demonstrates superior photocatalytic efficiency, which is attributed to electronic channels constructed by Zr-N bonds and S-scheme electron transport mechanism, effectively promoting the efficient separation of photogenerated charge carriers with high redox potentials. Density Functional Theory (DFT) calculations reveal redistributed electronic orbitals in CNU 3 , with progressive and continuous energy levels near the Fermi level, which bolsters electronic conduction. Comprehensive quenching experiments, Electron Paramagnetic Resonance (EPR), and in situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) analyses highlight a synergistic interplay of electrons, holes, and superoxide radicals in CNU 3 , inhibiting the generation of toxic nitrogen oxide intermediates and culminating in highly efficient photocatalytic NO oxidation. This study not only elucidates the mechanisms underpinning the enhanced performance of CNU 3 heterojunctions but also offers new perspectives on the preparation and interfacial charge separation of heterojunction photocatalysts.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SEPARATION SCIENCE
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2018
·Vol. 41
·期 22
·4149-4158
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IF 2.415
Huixiao Duo,Yuhuan Wang,Licheng Wang,Xiaofeng Lu,Xiaojing Liang
A zirconium(IV)-based metal organic framework, composed of 4,4′-biphenyldicarboxylic acid ligands and Zr 6 O 4 (OH) 4 clusters, was successfully fabricated. Characterizations were performed on fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, Brunauer-Emmett-Teller, and thermogravimetric analysis, which confirmed that it possessed large specific surface area, high pore volume, and strong acid resistant stability. Furthermore, the prepared material containing biphenyl skeleton and a large number of Zr-O bonds, can grasp acid herbicides especially phenoxyacetic acid herbicide s with aromatic structures through π-π interaction, hydrophobic interaction and Zr-O-H + bonds. Based on these advantages, a method was developed for the determination of four phenoxyacetic acid herbicide s from vegetable samples. Under the optimal conditions, wide linearities from 0.3 to 250 μg/L and low limits of detection from 0.1 to 0.5 μg/L were obtained. The intra- and interday relative standard deviations were 1.56-3.92 and 5.01-7.65%, respectively. The proposed method was applied to analyze phenoxyacetic acid herbicide s residues in the tomato, cucumber, and white gourd samples. The satisfactory recoveries (86.12–103.44%) for the spiked samples in vegetable samples were achieved which demonstrated the method was an efficient pretreatment procedure and has a potential application for the trace determination of phenoxyacetic acids from a complex matrix.
研究领域:
分析化学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
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2024
·
IF 3.9
Liu Yuhao,Wang Xuyi,Chen Jiayue,Wang Hua,Cheng Ming,Zheng Dan,Zhang Beibo,Geng Liang,Chen Liping,Jia Yingbin,Wang Luoxin
In this work, we synthesized core-shell NH 2 -UiO-66@UiO-67 via a solvothermal method to achieve controlled assembly of amino-modified UiO-66 and UiO-67 at micro and nano scale. NH 2 -UiO-66@UiO-67 exhibited notable visible light responsiveness and an increased specific surface area.In addition, it demonstrated outstanding performance in Cr(VI) removal, which can be attributed to the photocatalytic conversion of Cr(VI) into less toxic Cr(III), and the adjustable pores and large specific surface area facilitating Cr(III) adsorption. Notably, it exhibited a robust removal efficiency across a wide pH range of 2.0 to 10.0. Specifically, at pH = 2.0, the Cr(VI) solution with a concentration of 60 mg/L was completely removed within 140 min. The results show that the adsorption of core-shell NH 2 -UiO-66@UiO-67 meets the pseudo-second-order adsorption kinetics and has the ability of photocatalytic reduction of Cr (VI).
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Zhenyu Jing,Yanhui Li,Yang Zhang,Mingzhen Wang,Yaohui Sun,Kewei Chen,Bing Chen,Shiyong Zhao,Yonghui Jin,Qiuju Du,Xinxin Pi,Yuqi Wang
Zirconium alginate/graphene oxide (ZA/GO) hydrogel spheres were prepared by crosslinking sodium alginate and GO with Zr 4+ . Then Zr 4+ on the surface of the ZA/GO substrate acted as the metal nucleation site of the UiO-67 crystal and interacted with the organic ligand biphenyl 4-4′-dicarboxylic acid (BPDC) to make UiO-67 grow in situ on the surface of the ZA/GO hydrogel sphere by the hydrothermal method . The BET surface areas of ZA/GO, ZA/UiO-67, and ZA/GO/UiO-67 aerogel spheres were 1.29, 47.71, and 89.33 m 2 /g respectively. The maximum adsorption capacities of ZA/GO, ZA/UiO-67, and ZA/GO/UiO-67 aerogel spheres for methylene blue (MB) at room temperature (298 K) were 145.08, 307.49, and 1105.23 mg/g respectively. The kinetic analysis showed that the adsorption process of MB on the ZA/GO/UiO-67 aerogel sphere was consistent with the pseudo-first-order kinetic model. Isotherm analysis showed that MB was adsorbed on ZA/GO/UiO-67 aerogel spheres as a single layer. Thermodynamic analysis showed that the adsorption process of MB on the ZA/GO/UiO-67 aerogel sphere was exothermic and spontaneous. Adsorption of MB on ZA/GO/UiO-67 aerogel spheres is mainly dependent on π-π bond, electrostatic interaction, and hydrogen bond . After 8 cycles, ZA/GO/UiO-67 aerogel spheres still showed high adsorption performance and good reuse ability.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）