CHEMPHYSCHEM
·
2025
·
IF 2.2
Kan Hu,Dingchen Wang
The construction of efficient Z-scheme heterojunctions is considered as a promising approach to improve the transfer and separation of photogenerated carries in the field of photocatalytic hydrogen evolution from water splitting. Herein, a novel CdS/UiO-66(Ce) with Z-scheme heterostructure is successfully fabricated from metal sulfide CdS and cerium-based UiO-66 metal–organic framework via a hydrothermal method. The Z-scheme CdS/UiO-66(Ce) heterojunctions can provide abundant active centers, broaden the response range to visible-light region, accelerate the transfer of interfacial charges, and suppress the recombination rate of photogenerated electron–hole pairs. As a result, CdS/UiO-66(Ce) (ω(CdS) = 30%) exhibits a hydrogen production rate of 1.975 mmol g −1 h −1 , which is 19.1 times higher than that of UiO-66(Ce). Overall, this article may provide a new pathway for the rational design of efficient Z-scheme heterojunctions with photocatalytic hydrogen evolution. Graphical The Z-scheme heterojunction is a pivotal design strategy in photocatalysis for balancing efficient charge separation and strong redox capability. In this article, a Z-scheme CdS/UiO-66(Ce) heterojunction is constructed by combining cerium-based metal–organic framework UiO-66(Ce) with CdS and achieved efficient photocatalytic water splitting for 1.975 mmol g −1 h −1 hydrogen evolution under visible light, which is 19.1 times higher than UiO-66(Ce).
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高影响因子
Science Bulletin
·
2019
·
IF 6.277
Yang An,Yuanyuan Liu,Hongtao Bian,Zeyan Wang,Peng Wang,Zhaoke Zheng,Ying Dai,Myung-Hwan Whangbo,Baibiao Huang
UiO-67 is a Zr-based metal–organic framework (MOF) containing an organic linker namely, the dianion of biphenyl-4,4′-dicarboxylic acid (bpdc). Ce 4+ metal ions (0.02 Ce to Zr atom ratio) were incorporated into UiO-67 via partially replacing bpdc with the dianion of 2,2′-bipyridine-5,5′-dicarboxylic acid (bpydc); thus, the latter forms a bpydc-Ce complex. The resulting product (i.e., UiO-67-Ce) demonstrated a photocatalytic hydrogen evolution rate that was over 10 times higher than that of UiO-67. Through this modification, a new energy transfer channel is opened up. The energy transfer between the bpdc and bpydc-Ce ligands (i.e., from excited bpdc to bpydc-Ce) weakened the recombination of the charge carriers, which was confirmed by photoluminescence, emission lifetime, and transient absorption measurements. This study presents a new way to construct highly efficient MOF photocatalysts.
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Russian Journal of Physical Chemistry A
·
2026
·Vol. 100
·期 10
·2542-2555
·
IF 0.7
Lili Li,Li Jiaxin,Ma Yuyu,Shu Jing
The Ce-UiO-66-NH 2 material was successfully prepared by oil bath method, and TiO 2 and PANI were compounded on the basis of it, which improved the degradation efficiency of rhodamine B (RhB). XRD, TEM, and XPS characterization confirmed that the composite material formed a core-shell structure and polyaniline was uniformly coated. The composite with 20 μL aniline and CTAB surfactant showed the highest degradation efficiency, and the degradation rate of RhB reached 99.90% within 60 min under ultraviolet light irradiation. The band alignment and free radical trapping experiments show that it follows the ternary Z-type heterojunction mechanism, \( \bullet {\kern 1pt} {\text{O}}_{2}^{ - }\) is the main active species. It provides a new idea for the design of high-performance photocatalysts and is of great significance for promoting the application of photocatalytic technology in water pollution control.
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INORGANICA CHIMICA ACTA
·
2022
·
IF 3.118
Mingyan Chen,Dehua Zhang,Ziying Wang,Yao Zhang,Yucheng Liu
UiO-66 loading carboxyl and phosphotungstic acid has a good affinity to thiophene (TH). The synthesized catalyst, changed its original structure, which can increase its reactive site and enhance the interaction with thiophene (TH) in order to improve the adsorption performance. Then the structural changes were analyzed by XRD, FT-IR, SEM, BET, EDS and other characterization methods. Through static experiments of adsorption desulfurization, it is found that when the adsorption time is 240 min, the adsorption temperature is 30 ℃ and the oil-to-agent ratio is 100:1, the adsorption effect: UiO-66-(COOH) 2 (UC2) > UiO-66, the highest adsorption capacity can reach 89.99 mg/g; while PTA@UiO-66 (PAU) can reach adsorption equilibrium at 210 min, it has better desulfurization performance than UiO-66. After being recycled for 5 times, the adsorption effect is only slightly decreased: the adsorption capacity of UC2 was still 78.02% of the initial adsorption capacity, while that of PAU was 76.07% of the initial adsorption capacity. According to the adsorption kinetics, the adsorption process of thiophene on the adsorbent UC2 is more consistent with W-M model, and the adsorption of PAU is more in line with the pseudo-first order kinetic equation. In addition, it also includes the process of intraparticle diffusion and liquid film diffusion.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Yanan Ding,Feng Wei,Changchang Dong,Jiadong Li,Chang Zhang,Xiaojun Han
Heavy metal ion pollution has been a potential threat to human health. Herein, a sensitive electrochemical sensor for simultaneously detection of Cd(II) and Pb(II) was developed using a metal–organic framework material UiO-66. UiO-66 before and after carbonization was used to modify the GCE electrodes, respectively. The carbonized UiO-66 modified GCE electrode (CUiO-66/Bi/GCE) showed good detection ability with the linear detection range of 10–50 μg/L and detection limit of 1.16 and 1.14 μg/L for Cd(II) and Pb(II), respectively. Compared with UiO-66, carbonized UiO-66 provided more active sites for Bi ions and heavy metal ions to co-deposit and facilitated the electron transfer, leading to better detection performance. The decoration strategy was applied to disposable screen-printed carbon electrodes (SPCEs) to obtain the linear detection range of 20–120 μg/L and detection limit of 4.67 and 1.24 μg/L for Cd(II) and Pb(II) respectively. The prepared electrochemical sensors hold great potential in real water sample detections.
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MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 11
·1-8
·
IF 5.479
Guo Lan,Liu Yuan,Qu Fengli,Liu Zhe,Kong Rongmei,Chen Guang,Fan Wenjing,Xia Lian
A luminescent metal organic framework (LMOF) of type UiO-66-NH 2 was chosen for specific and sensitive detection of trace levels of hypochlorite. Hypochlorite causes the quenching of the blue fluorescence of nano-UiO-66-NH 2 (with excitation/emission maxima at 325/430 nm), and this finding forms the basis for a fluorometric assay for hypochlorite. The method overcomes disadvantages of conventional redox-probes which are interfered by oxidants with oxidation capability stronger than that of hypochlorite. Compared with other fluorescent probes for sensing hypochlorite, UiO-66-NH 2 has a comparable detection limit of 0.3 μmol L −1 and a broad linearity relationship in the range of 1–8 μmol L −1 . The probe was successfully applied to the detection of hypochlorite in complex water samples and living Hela cells.
Schematic representation of hypochlorite induced quenching of the blue fluorescence of nano-UiO-66-NH 2 (with excitation/emission maxima at 325/430 nm) through energy transfer. It overcomes disadvantages of conventional redox-probes which are interfered by oxidants with oxidation capability stronger than that of hypochlorite.
研究领域:
分析化学
·
材料科学
·
生物医学
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MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 6
·1-11
·
IF 5.833
Ma Mingxuan,Zhang Jian,Li Peipei,Du Yingxiang,Gan Jie,Yang Jiangxia,Zhang Liu
Metal-organic framework (UiO-66-NH 2 )-incorporated organic polymer monolith was prepared by thermal polymerization. By virtue of the superior physical and chemical properties, the UiO-66-NH 2 -modified organic monolith was then functionalized by chiral selector cellulase via the condensation reaction between the primary amino groups and aldehyde groups. The synthesized materials were characterized by Fourier transform infrared spectroscopy, high-resolution transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectrometry, thermogravimetric analysis, and nitrogen sorption isotherm. The cellulase@poly(glycidyl methacrylate-UiO-66-NH 2 -ethylene glycol dimethacrylate) (cellulase@poly(GMA-UiO-66-NH 2 -EDMA)) monolith was applied to enantiomerically separate the basic racemic forms of metoprolol, atenolol, esmolol, bisoprolol, and propranolol. In contrast to the cellulase@poly(GMA-co-EDMA) monolith without UiO-66-NH 2 , the cellulase@poly(GMA-UiO-66-NH 2 -EDMA) monolith reveals significantly improved enantiodiscrimination performance for metoprolol (Rs: 0 → 1.67), atenolol (Rs: 0 → 1.50), esmolol (Rs: 0 → 1.52), bisoprolol (Rs: 0 → 0.36), and propranolol (Rs: 0 → 0.44). The immobilization pH of cellulase, buffer pH, UiO-66-NH 2 concentration, and the proportion of organic modifier were evaluated in detail with enantiomerically separating chiral molecules. The intra-day, inter-day, column-to-column, and inter-batch precision have been discussed, the result was preferable, and the relative standard deviation (RSD) of separation parameters was <4.3%. Graphical abstract
Schematic representation of the preparation of a UiO-66-NH 2 -modified organic polymer monolith for enantioseparating five racemic β-blockers. UiO-66-NH 2 was synthesized and converted into a monolith as the stationary phase. Then, the modified monolith containing cellulase as the chiral selector was applied in a capillary electrochromatography system for enantioseparating chiral drugs.
研究领域:
分析化学
·
药物化学
·
生物技术
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ADSORPTION SCIENCE & TECHNOLOGY
·
2016
·
IF 0.633
Jing-Hua Yang,Xiao-Mao Zhou,Yu-Ping Zhang,Jun Chen,Hai-Weng Ma
In this paper, a novel polymerized fiber doped with metal–organic frameworks (UIO-66(Zr)-NH2) was developed in a capillary by microwave irradiation. The fiber was successfully prepared using 4-vinyl pyridine as the monomer and ethylene glycol dimethacrylate as the cross-linker to reinforce its durability. The resultant fiber was applied to extract sulfonylurea herbicides from environmental soil and water samples before analysis with high-performance liquid chromatography. The optimization of different parameters affecting solid-phase microextraction procedure was carried out. Under the optimum experimental conditions, the extraction capability of the hybrid fiber was two times greater than that of the polymer fiber without UIO-66(Zr)-NH2.The proposed hybrid fiber extraction method exhibited low detection limits (0.19–1.79 µg/l), good precision (<12.0%), and wide linear range (10–700 µg/l). Satisfactory recoveries of sulfonylurea herbicides were obtained with spiked soil and water samples in the range of 75.7–94.2 and 82.2–95.3%, respectively.
研究领域:
分析化学
·
环境科学
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JOURNAL OF CHROMATOGRAPHY A
·
2020
·
IF 4.049
Lian Xia,Yanan Dou,Jie Gao,Yumeng Gao,Wenjing Fan,Guoliang Li,Jinmao You
In this work, a dispersive solid phase extraction (d-SPE) method for sulfonamides (SAs) has been developed using a stable and mesoporous metal organic framework (University in Oslo 67, UiO-67) as adsorbent, which was synthesized by coordination of Zr 4+ ions with 4, 4-biphenyl-dicarboxylicacid (H 2 BPDC) through a facile one-pot method. Owing to the synergistic effects of π-π interaction, hydrogen bonding , hydrophobic interaction and size match between SAs and the adsorbent, the extraction performance of UiO-67 for SAs was obviously improved. The adsorption behavior , evaluated by the kinetic models , showed that the intraparticle diffusion was involved during the adsorption process. The proper match between the pore size of UiO-67 (3.49 nm) and the molecular sizes of SAs (1.1 nm × 0.65 nm) not only allowed SAs to diffuse intraparticle but also permitted them to adjust their configurations to form hydrogen bonding with the UiO-67. By combination with HPLC analysis, a simple, sensitive, accurate and precise method for detection of SAs has been established. The method proposed in this work showed good performances, including wide linearity (14.6–250 ng/g) with high correlation coefficients ( R ≥ 0.9991), low limits of detection (LODs, 0.7–6.5 ng/g for all SAs), satisfactory precision (Intra-day RSDs ≤ 3.4%, inter-day RSDs ≤ 4.7%), and high accuracy (recovery: 83.4–103.8%). Furthermore, benefiting from the mesoporous structure and the Zr cluster center as well as the stability, UiO-67 shows great potential to be an excellent adsorbent of SPE for extraction of SAs from other complex matrices.
研究领域:
分析化学
·
食品科学
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ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Yong Li,Dongping Fang,Chao Yang,Xike Tian,Yulun Nie,Jianbo Shi
The detection of per- and polyfluoroalkyl substances (PFASs) in the environment is critical due to their adverse health effects, but it remains challenging because of the high cost and technical complexity of standard analytical methods. We developed a series of rare earth-based bimetallic metal–organic frameworks (MOFs) for the sensitive and efficient fluorescence detection of perfluorooctanoic acid (PFOA). By systematically modulating the ligand functional groups with amino (−NH2), hydroxyl (−OH), and fluorine (–F) moieties, the influence of ligand electronegativity on the PFOA recognition performance was evaluated. The experimental results demonstrated that the local electrostatic potential of the MOFs, governed by the functional groups, is a critical factor in determining the PFOA binding affinity and fluorescence sensitivity. Eu/UiO-66-NH2 demonstrated the highest sensitivity and selectivity for rapid fluorescence detection of PFOA, which was due to its strong positive electrostatic potential to facilitate binding via electrostatic attraction and synergistic hydrogen bonding. PFOA concentrations in actual water samples can also be determined by Eu/UiO-66-NH2. These findings provide theoretical insights and experimental support for the functional design of MOF-based sensors, paving the way for the sensitive and selective detection of PFASs.
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NANO
·
2026
·
IF 1.3
Congcong Bai,Hongying Hou,Wenting Mao,Runjie Wu
Poor conductivity of UiO-66 severely limited the electrochemical performances in the supercapacitors, which were alleviated and improved by combining with polypyrrole (PPy) with high conductivity and pseudocapacitive properties. Herein, a series of UiO-66@x%PPy ( x = 5 , 1 0 , 2 0 , 3 0 ) composites were prepared by solvothermal reaction followed by in-situ polymerization of pyrrole(PPy); furthermore, the influence of PPy’s loading on the structural properties was also systematically investigated. Desirably, the obtained composites maintained the “rigid-flexible” core-shell octahedral structure. Furthermore, the UiO-66@20%PPy composite exhibited the highest electrochemical performances with the specific capacitance of 204.1 F/g in a three-electrode system and 118.18 F/g in a two-electrode system at 1 A/g. Furthermore, the asymmetric two-electrode supercapacitor exhibited a high capacitance retention of 88.25% after 2000 cycles at 2 A/g. The synergistic effect between the continuous three-dimensional (3D) conductive network of PPy phase and the double-layer capacitance of porous UiO-66 framework may be responsible for the desirable results. Seemingly, an effective interfacial strategy was indeed beneficial for developing a high-performance UiO-66-based supercapacitor.
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ACS Applied Nano Materials
·
2026
·
IF 5.8
Yao Zhang,Hui Zhang,Ziyao Jia,Chunya Li,Lianqing Chen,Shiwei Jin
Surface-enhanced Raman scattering (SERS) holds significant potential for rapid food safety screening; however, its application is often constrained by substrate sensitivity, stability, and cost. Here, we developed a multifunctional SERS substrate by integrating a 3D-printed microstructured template with a slippery liquid-infused porous surface (SLIPS) and Ag/UiO-66 metal–organic framework (MOF) nanoparticles for food safety monitoring. The nearly pinning-free SLIPS interface enabled evaporation-driven enrichment of nanoparticles at microcone tips, generating dense, spatially confined hotspots with an enhancement factor (EF) of 1.44 × 108. The Ag/UiO-66@SLIPS substrate demonstrated ultrasensitive SERS detection of illicit sildenafil (SD) and food-dye additives (using rhodamine 6G as a model). The substrate achieved limits of detection (LOD) for SD of 100 pg/mL (2.11 × 10–10 M) in ethanol and 1 ng/mL (2.11 × 10–9 M) in health wine using only 10 μL samples. For rhodamine 6G (R6G), an ultralow LOD of 1 fg/mL (2.09 × 10–15 M) was obtained. Furthermore, for photocatalytically degradable dyes, the inherent catalytic activity of Ag/UiO-66 provided a self-cleaning pathway to mitigate signal carryover and enabled repeated measurements. The substrate maintained 83.5% signal intensity over 150 days and can be refreshed for continued use. This work combines biomimetic structures with functionalized nanomaterials, enabling the simple, cost-effective development of robust, uniform SERS substrates for multiscenario trace molecular sensing in food safety.
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