CHINESE JOURNAL OF CHEMICAL PHYSICS
·
2020
·Vol. 33
·期 4
·394-400
·
IF 1.067
Liu Jia,Jiang Shen-long,Zhang Qun
We constructed two types of copper-doped metal-organic framework (MOF), i.e ., Cu@UiO- 66-NH 2 and Cu-UiO-66-NH 2 . In the
former, Cu 2+ ions are impregnated in the pore space of the
amine-functionalized, Zr-based UiO-66-NH 2 ; while in the latter, Cu 2+ ions are in-corporated to form a bimetal-center MOF, with Zr 4+ being partially
replaced by Cu 2+ in the Zr−O oxo-clusters. Ultrafast spectroscopy revealed that
the photoinduced relaxation kinetics associated with the ligand-to-cluster charge-transfer
state is promoted for both Cu-doped MOFs relative to undoped one, but in a sequence of
Cu-UiO-66-NH 2 >Cu@UiO-66-NH 2 >UiO-66-NH 2 . Such a
sequence turned to be in line with the trend observed in the visible-light photocatalytic
hydrogen evolution activity tests on the three MOFs. These findings highlighted the subtle
effect of copper-doping location in this Zr-based MOF system, further suggesting that
rational engineering of the specific metal-doping location in alike MOF systems to promote
the photoinduced charge separation and hence suppress the detrimental charge recombination
therein is beneficial for achieving improved performances in MOF-based photocatalysis.
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高影响因子
JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Liang Shao,Qian Wang,Zhonglei Ma,Zhanyou Ji,Xiaoying Wang,Doudou Song,Yuguo Liu,Ni Wang
Metal-Organic Frameworks (MOFs) attract increasing attention in the field of energy storage, however, poor conductivity in most MOFs largely hinders their electrical properties. In this work, an effective strategy is developed to make the polyaniline (PANI) molecular chains grow in the pores of UiO-66 as one of the MOFs (labeled as PANI/UiO-66) to form a fixed interpenetrating network structure by using the highly stable porous MOFs , through a variety of synergistic effects to enhance the conductivity and electrochemical properties . Moreover, the design and analysis about PANI/UiO-66 is reported for the first time to our knowledge. In addition, PANI/UiO-66 exhibits an extraordinary capacitance of 1015 F g −1 at 1 A g −1 by electrochemical test. At the same time, the symmetric flexible solid-state supercapacitors is also assembled and tested. The resultant supercapacitor shows a favorable specific capacitance of 647 F g −1 at 1 A g −1 and a high cycling stability (91% capacitance retention after 5000 cycles). The bending test indicates that the obtained supercapacitor is flexible and its performance is only decreased 10% after 800 bending cycles with a bending angle of 180. This flexible solid-state supercapacitor shows great potential in energy storage device.
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高影响因子
ELECTROPHORESIS
·
2018
·Vol. 39
·期 20
·2619-2625
·
IF 2.569
Pingxiu Tang,Rong Wang,Zilin Chen
The high stability and other properties of Zr(IV)-based metal organic frameworks(MOFs) make it a promising choice for chromatographic separation, while the application in open-tubular capillary electrochromatography (OT-CEC) separation has not been explored yet. Herein, we report the first example of the in-situ growth of UiO-66-NH 2 onto the capillary for open-tubular capillary electrochromatography. UiO-66-NH 2 consists of ZrCl 4 and 2-amino-1,4-benzenedicarboxylic acid, which is highly porous and stable in a variety of solvents. The prepared UiO-66-NH 2 modified capillary was characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectra (FT-IR), and the results confirmed the successful growth of the UiO-66-NH 2 . The baseline separation of chlorobenzenes, phenoxyacids and two groups of phenols was achieved owing to the combined interaction of π-π interaction, hydrophobic interaction, molecular sieve effect, electrophoretic migration and hydrogen-bonding interaction etc. Besides, the prepared capillaries showed good reproducibility, with relative standard deviations (RSDs) for intra-day, inter-day and column-to-column runs in the range of 1.38–2.60%, 3.39–4.05%, and 3.47–5.03%, respectively. Our work indicates Zr(IV)-based MOFs are promising materials as stationary phase in CEC separation.
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高影响因子
Nanoscale
·
2025
·
IF 5.1
Jin Wang,Tianlong Zhou,Jie Zou,Jianhang Hai,Yunqing Lu
Triboelectric nanogenerators (TENGs) have emerged as a promising technology to harvest energy from the environment due to their self-powered characteristics, simple structure, low cost and high flexibility. To improve their performance, this work proposes a hierarchical optimization strategy, which integrates the employment of polyimide (PI) matrix, the doping of metal-organic framework and the surface patterning of TENG triboelectric layers to achieve high output performance and durability. In the work, the PI/UIO-66-NH₂ mixed matrix membrane (MMM) is first synthesized and characterized, where the influence of UIO-66-NH₂ loading amount on the triboelectric properties of MMM is analyzed. The measurement results show that this MMM exhibits excellent dielectric properties and thermal stability. Subsequently, the TENG device operated in the vertical contact-separation mode is fabricated, where MMM is used as the negative triboelectric layer and pure PI membrane as the positive layer. Moreover, the surface patterning method based on soft imprint lithography is applied to both triboelectric layers to augment their effective contact areas. Then, the output performance of TENG is characterized. It is found that, for the weight ratio of UIO-66-NH₂ of 5 wt%, the patterned UIO-66-NH₂ MMM-based TENG (P-TENG-5) achieves a maximum output power density of 78.27 ± 3.42 μW/cm², which is 5.76 times higher than that of unpatterned TENG-5 and 361.35 times greater than that of pure PI-based TENG-0. Remarkably, P-TENG-5 maintained stable performance over 20,000 cycles at 2 Hz without the considerable performance degradation.
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产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Jiazhuang Chen,Yonglian Zhang,Yingjie Guo,Zan Chen,Cuijia Duan,Claudia Li,Sibudjing Kawi,Yinhui Li
To address the low visible-light absorption of titanium oxide (TiO 2 ) and the agglomeration tendency of covalent-organic-framework (COF), UiO-66 modified by amination was combined with acyl chloride covalent organic framework (AC COF) synthesized by ultrasonic assisted method to successfully form AC COF@UiO-66 core-shell structure. Subsequent TiO 2 loading formed a heterojunction that narrows the band gap, suppresses charge recombination, and extends visible-light absorption. Compared to AC COF, the adsorption performance of the TiO 2 /AC COF@UiO-66 increased by 7.4 times, reaching 432.9 mg/g. The active species that play a main part in the photocatalytic degradation process are h + and ·OH. Experimental results demonstrate that tetracycline (TC) can be entirely degraded within 40 min. In this work, the functional design of adsorption and photocatalysis was carried out on UiO-66 framework material, which overcame the limitations of individual component in the treatment of tetracycline wastewater and provided a new strategy for the design of ternary composite photocatalytic materials.
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Tursunjan Aydan,Nuermaimaiti Yimamu,Ding Kaize,Yao Zhengzheng,Guan Qingqing
Metal-organic frameworks (MOFs), particularly UiO-66, offer advantages in biomass catalytic conversion due to their good thermal stability, tunable porosity and abundant active sites. However, agglomeration limits their catalytic efficiency. To address this, a series of acid-base bifunctional UiO-66-type catalysts supported on biochar (BC) was developed in green solution through a one-pot method. BC prepared by pyrolyzing cotton stalks (CS) under N 2 atmosphere at high temperature and activated before use. The physico-chemical properties of materials were studied by various characterization methods, and their catalytic performance for converting cellulose to 5-hydroxymethylfurfural (5-HMF) in [BMIM]Cl ionic liquid was evaluated. Reaction parameters such as catalyst type, catalyst loading, temperature and time were optimized. Under the optimized conditions, achieving a 5-HMF yield of 46.58 %. The BC-supported catalyst NH 2 -UiO-66-SO 3 H/BC exhibited significantly higher catalytic activity than its unsupported counterpart and increased the 5-HMF yield by 23.78 %. This performance improvement is attributed to the grafted sulfonic/amino groups, which enhance the catalytic performance by improving the dispersion of UiO-66 upon the introduction of BC. This work demonstrates biochar-supported UiO-66 as an effective strategy for enhancing catalytic efficiency in sustainable biomass valorization to platform chemicals.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Shuaiyang Jiang,Ya Liu,Yulu Liu,Dongfang Wang,Xiaofeng Wang,Qian Li
A portable home hemodialysis device is a miniaturized and easy-to-operate medical apparatus designed for patients with chronic kidney disease, enabling them to conveniently perform hemodialysis at home or while traveling. However, it imposes high requirements on the dialysis membrane in terms of dialysis efficiency, adsorption capacity, and blood compatibility. In this study, the composite membrane was fabricated through electrospinning, which is an in situ synthesis of carbon nano tube (CNT) bridged UiO 66 (COOH) 2 on PTFE fibers. UiO 66 (COOH) 2 increased the adsorption site by association with CNT, and achieved the adsorption of creatinine by hydrogen bond and π bond, which greatly reduced the usage of dialysis solution. UiO 66 (COOH) 2 and CNT were first combined for creatinine adsorption, and its maximum static adsorption capacity was 66 mg/g. During the dialysis, the yielding membrane showed a creatinine clearance of 64.89% and a resistance protein rate of more than 98%. Compared with pure PTFE dialysis membrane, the amount of dialysate used to achieve the same dialysis effect was merely 1/10. Furthermore, the membrane has a hemolysis rate of 2% and a low platelet adhesion rate, which shows excellent blood compatibility. Therefore, the dialysis membrane prepared in this study is expected to promote the development of portable home hemodialysis devices.
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高影响因子
TALANTA
·
2021
·
IF 6.057
Huazheng Yu,Yanhong Li,Aisheng Huang
Sialic acid (SA) is a crucial component of glycoproteins and glycolipids on the cellular membrane, which is essential for maintaining the function of cell membranes, such as cell recognition and communication. Simultaneously, sialic acid plays a significant role in many physiological and pathological processes. Hence, it is urgent to develop a simple and sensitive strategy for determining sialic acid. In this work, a new metal-organic framework called UiO-66-NH 2 @B(OH) 2 has been designed and synthesized for the recognition and detection of sialic acid. The boronic acid functional group in UiO-66-NH 2 @B(OH) 2 can bind to a diol moiety of the glycerol side chain of sialic acid, which will attenuate or even quench the fluorescence of UiO-66-NH 2 @B(OH) 2 , thus opening a new road to detect sialic acid. Based on the measurement results, sialic acid can be quantitatively measured in a linear range of 0.05–2.5 mmoL/L with the UiO-66-NH 2 @B(OH) 2 probe. The detection limit of sialic acid is as low as 0.025 mmol/L. Furthermore, the boronic-acid functionalized probe UiO-66-NH 2 @B(OH) 2 displays high sensitivity and high selectivity to recognize the sialic acid in mouse serum samples. Therefore, the developed UiO-66-NH 2 @B(OH) 2 can be used as a promising probe to identify and detect sialic acid in the practical application.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Jiang Fan,Wufeng Wu,Zong Lu,Yanying Wei
The Metal-Organic Framework (MOF) materials are ideal molecular sieving membrane materials due to the regular pores with high-density and good designability, which have been widely studied in gas separation, desalination, and nanofiltration , etc. However, most preparation methods of MOF polycrystalline membranes are always time-consuming and the as-synthesized MOF membranes are thick. Here in this work, the ultrathin 210 nm-UiO-66 polycrystalline membranes are rapidly synthesized in 1 h, where sonication is utilized to generate massive tiny nucleation followed with rapid microwave-assisted membrane growth. The Na + rejection of the UiO-66 membrane maintains at 99.6% for 700 h long-term experiment with 0.16 L/(m 2 h bar) of water flux in forward osmosis, indicating the good quality and excellent stability of the as-synthesized membrane. This strategy is also expected to synthesize many other continuous defect-free MOF membranes with ultrathin thickness rapidly.
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高影响因子
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2022
·Vol. 194
·期 11
·5167-5184
·
IF 3.094
An Peide,Zhu Fenfen,Liu Shiji,Zhou Xiaolin,Wang Chunfang,Liu Yufeng,Meng Hao,Zhang Xia
Recently, metal–organic frameworks (MOFs) are considered to be the moderate hosts for the bio-enzymes owing to their unique 3D pores and controllable surface affinity to the target molecules. In this work, the benzoic acid (BA)–modulated UiO-66-NO 2 was introduced, and cytochrome c (Cyt C) was chosen as the target enzyme to evaluate the immobilization efficiency of the resulting UiO-66-NO 2 -BA. The immobilization conditions including pH, adsorption time, and temperature and the initial concentrations of BA were optimized. The adsorption kinetics and thermodynamics were analyzed to further explore the enhanced adsorption mechanism. It is worth noted that all the UiO-66-NO 2 -BA exhibited evidently enhanced adsorption capacities in comparison with the unmodified UiO-66-NO 2 due to the formation of the chemical bonds between the UiO-66-NO 2 -BA and cytochrome C, indicating the positive roles of BA modification. Finally, the activities of the immobilized cytochrome C were assessed by using the catalytic oxidation of ABTS in the presence of H 2 O 2 , which reactions were also conducted over the free cytochrome C for comparison. The evidently improved stability under definite pH range, prolonged durability against the organic solvents, and the good reusability of the immobilized cytochrome C highlight the prospect applications of functional MOF immobilized enzymes in the practical catalytic reactions. Graphical abstract
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高影响因子
ACS Applied Engineering Materials
·
2023
·
IF 0
Minghui Wan,Saijie Song,Wenli Feng,Xiaoyuan Wang,Jian Shen
A pesticide delivery system (PDS) is an effective strategy to overcome the low efficiency of conventional pesticide formulations. UiO-66, a metal–organic framework (MOF), is a suitable nanocarrier for pesticide delivery due to its large surface area, good stability, and nontoxicity. In this work, we developed deltamethrin-loaded UiO-66 (DM@UiO-66) as a PDS for sustained DM release and enhanced pest control. DM was loaded on UiO-66 via a physical adsorption method, forming a stable DM@UiO-66 nanoformulation (loading capacity 1049.6 mg/g). Unlike the burst release of free DM, DM@UiO-66 exhibits sustained pesticide release performance, which can maintain effective insecticidal concentration for a long time. Biological assay results indicate that DM@UiO-66 possesses better insecticidal activity than free DM, and the nanoformulation is safe for maize seeds and seedlings. In addition, DM@UiO-66 contains no toxic organic solvents or additives, which makes it environmentally friendly. Thus, the UiO-66-based PDS will hold a great future in agriculture and pest control fields.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 4
·1-16
·
IF 2.8
Wu Sheng,Wang Tingting,Li Yingwei
A novel 3D octahedral BiOBr/UiO-66 heterostructure photocatalyst was synthesized through the in-situ growth of BiOBr nanosheets on octahedral UiO-66 at ambient temperature. This heterojunction of type II exhibits a substantial specific surface area, promoting intimate interfacial contact which favors carrier transmission and enhances the contact area of the semiconductor surface reaction. The morphology and structure of the catalyst were characterized via SEM and TEM. Transient photocurrent and electrochemical impedance spectroscopy confirm the advantageous nature of the heterojunction for carrier separation. Further investigation delves into the photocatalytic degradation of RhB. After 70 min of light irradiation, the removal rate of RhB reached a remarkable 94.9% using the 60% BiOBr/UiO-66 composition. Furthermore, the apparent kinetic constant of the 60% BiOBr/UiO-66 was measured to be 0.03522 min −1 , surpassing pure BiOBr (0.01238 min −1 ) by a factor of 2.9 and UiO-66 (0.00035 min-1) by a factor of 100. Experiments involving free radical capture provide evidence that superoxide radicals (·O 2− ), electrons(e − ) and holes (h + ) are the principal active species during the photodegradation process. Accordingly, a proposed photocatalytic mechanism for the BiOBr/UiO-66 heterojunction emerges.
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高影响因子
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