Small
·
2024
·Vol. 20
·期 34
·2401914
·
IF 13
Zhaohui Fang,Xiaoyang Yue,Quanjun Xiang
Metal halide perovskite quantum dots (QDs) are widely studied in the field of photocatalytic CO 2 due to their strong light absorption and long carrier migration length. However, it can not exhibit high catalytic performance because of the radiative recombination and the lack of effective catalytic sites. Metal organic frameworks (MOFs) encapsulated QDs can not only solve the aforementioned problems, but also maintain their own unique characteristics with ultra-high specific surfaces area and abundant metal sites. In this work, lead-free bismuth-based halide perovskite QDs are encapsulated into Zr-based MOF (UiO-66), which combines the advantages with high power conversion efficiency of QDs and the high surface area and porosity of UiO-66. In addition, benefiting from the close contact between the Cs 3 Bi 2 Br 9 QDs and the UiO-66 enables the photogenerated electrons in the QDs to be rapidly transferred to the MOF. As a result, the Cs 3 Bi 2 Br 9 @UiO-66 composite exhibits a higher yield for photocatalytic CO 2 reduction than that of the prepared large-sized composite of Cs 3 Bi 2 Br 9 and UiO-66.
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JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Mingmin Jia,Xiong-Fei Zhang,Yicheng Zhou,Hengyang Mao,Yijiang Zhao,Jianfeng Yao
In this work, Amine-functionalized CNF/UiO-66 (CNF–NH 2 /UiO-66) composite membranes were fabricated by incorporating UiO-66 nanoparticles in the CNF–NH 2 matrix. The CO 2 -facilitated transfer channels can be constructed in the CNF–NH 2 /UiO-66 composite membrane. As a natural polymer material, CNF–NH 2 would absorb water and form a gel-like structure under humidification. The adsorbed water can convert CO 2 into bicarbonate ions (HCO 3 − ) through the catalysis of amino groups on CNF–NH 2 . Moreover, in CNF–NH 2 /UiO-66 composite membranes, HCO 3 − could quickly migrate to the permeate side promoted by the porous UiO-66, facilitating CO 2 transport. The optimum membrane gave a CO 2 permeability of 257.0 Barrer with a CO 2 /CH 4 ideal selectivity of 71.3.
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INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Jing-ran Yu,Pan-pan Zhang,Jia-yu Ding,Yue-bin Liu,Wei-hai Lin,Wei Shao,Jia-jia He,Qihan Gong,Ming Xue
The separation of high-octane dibranched alkanes from naphtha is critical in the refining of gasoline. To date, research on the membrane-based separation of alkane isomers has been limited, with a particular paucity of investigations into mixed-matrix membranes. Herein, the continuous and dense UiO-66/PIM-1 mixed-matrix membrane, which was prepared through precise control of the interfacial structure, was first applied to the differentiation of C6 alkane isomers. Due to the synergistic combination of UiO-66 with differential adsorption capabilities for alkanes and PIM-1 that possesses a cross-linkable structure, the resulting UiO-66/PIM-1-(20) membrane demonstrated remarkable separation performance and high stability. Pervaporation measurements showed that the mass fraction of 2,2-dimethylbutane in the feed side was increased from 50.0 to 75.8 wt % while an excellent flux of 1700 g m–2 h–1 was maintained over a continuous 40 h period. The UiO-66/PIM-1-(20) membrane, characterized by its facile replication and processing, shows potential for large-scale fabrication. This study offers a new approach to the membrane separation of alkane isomers.
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DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Zeng Liu,Yuanyuan Zeng,Lan Long,Yang Li,Wei Zhou
Metal organic framework (MOF), with light weight, high specific surface area, and tenability had significant electromagnetic wave (EMW) absorption potential. Ultrathin and efficient UiO-66 MOF/CNT composites are successfully prepared using a simple solvothermal method. The high porosity and large specific surface area of the MOF provide multiple pathways for charge transport, significantly enhancing the probability of EMW reflection and scattering. Under the synergistic effect of CNTs, the conductivity loss and polarization relaxation loss of the composites increased, leading to improved impedance matching. With the combined influence of various attenuation mechanisms, the composites exhibit outstanding EMW absorption performance, with a minimum reflection loss of −54.74 dB and an effective absorption bandwidth of 2.94 GHz at a thickness of 2.04 mm. Additionally, the radar cross section of the MOF/CNT composites was reduced by a maximum of 14.8 dB compared to that of a metal plate, demonstrating excellent practical application potential. Therefore, lightweight, ultrathin, and broadband high-efficiency absorption MOF/CNT composites held significant promise for widespread EMW absorption applications.
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Molecular Catalysis
·
2022
·
IF 5.089
Zhengjie Li,Chen Ma,Miao Qi,Yunlong Li,Yanchao Qu,Ying Zhang,Lilong Zhou,Jimmy Yun
Nano CeO 2 (CeMOF) maintaining the primary micromorphology and pore structure of MOFs was successfully synthesized by controlled pyrolysis of UiO-66(Ce) in air. CeMOFs showed excellent activity for catalytic combustion of VOCs, including toluene, benzene and xylene. The results showed that the T 10% , T 50% and T 90% of toluene over CeMOF were 185, 198 and 206 ℃ (GHSV = 22500 h −1 , toluene concentration = 1000 ppm), respectively, which are the lowest among ever reported ceria catalysts. According to various characterization results, the high catalytic activity of CeMOF can be ascribed to its neat pore structure and high percentage of Ce with low chemical valence. The latter leads to massive surface oxygen species and oxygen vacancies which provides abundant oxidative sites for VOCs. The low-temperature reducibility and multiple weakly acidic sites also enhanced the catalytic activity. In addition, CeMOF shows good ability to resist H 2 O and thermal stability. The in-situ DRIFTs study of CeMOF shows toluene is degraded by continuous stages through quick conversion of toluene to benzaldehyde and adsorbed benzoate, and forms CO 2 and H 2 O at last.
研究领域:
材料科学
·
环境科学
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SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Xin Zhang,Ke Jiang,Huajun He,Dan Yue,Dian Zhao,Yuanjing Cui,Yu Yang,Guodong Qian
A fluorescent pH sensor based on post-synthetically modified nanoscale UiO-67-bpydc by encapsulating Eu 3+ cations in the pores was fabricated. The Eu 3+ incorporated sample (Eu 3+ @UiO-67-bpydc) shows excellent luminescence due to the sensitization and protection provided by the parented framework. Subsequently, Eu 3+ @UiO-67-bpydc was developed as a pH sensor. Eu 3+ @UiO-67-bpydc shows good chemical resistance to both acidity and alkalinity solutions with pH ranging from 1.06 to 10.99, which makes it potentially useful for wide-range pH sensor. In addition, cycling experiments have demonstrated the utilizability of the sensor. The MTT analysis shows that Eu 3+ @UiO-67-bpydc possesses favourable biocompatibility. Furthermore, fluorescence imaging of Eu 3+ @UiO-67-bpydc in PC12 cells was also performed to test its feasibility in vivo. Given its exceptional stability and pH-dependent fluorescent intensity, the fluorescent probe should be a promising candidate for application in fluorescent pH sensing in vitro and in vivo.
研究领域:
材料科学
·
生物医学工程
·
分析化学
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LANGMUIR
·
2025
·
IF 3.9
Shang Wu,Lihua Chen,Jiajia Wang,Qiyue Tong,Zhenyang Yu,Qinzheng Hu,Zhe Wang,Yuzhi Sun,Guihua Li,Quanlu Yang
NH2-UiO-66 has been recognized as a promising porous material due to its large specific surface area (SSA) and excellent structural stability. However, their poor electrochemical performance hinders their application in supercapacitors. In this study, NH2-UiO-66 was attached to the surface of NiCo-LDH nanoflower by employing the self-assembly strategy, which significantly inhibited the stacking of NiCo-LDH nanoflower, forming the NiCo-LDH/NH2-UiO-66 (NC/NU) composite. Owing to weakening of the aggregation effect, abundant redox-active sites, and ion diffusion channels of NH2-UiO-66, the obtained NC/NU composites exhibit a high specific capacitance of 867.4 F g–1 at 1 A g–1 and an outstanding cycling stability of 86.7% after 10,000 charge/discharge cycles. Additionally, derived 3D reticulated porous carbon (PCC) with ZIF-67 and sodium carboxymethyl cellulose (CMC) as precursors was synthesized by a two-step KOH activation strategy and used as an anode material. The hybrid supercapacitor (NC/NU-80//PCC-0.75) provides an energy density of 30.6 Wh kg–1 at a power density of 800.6 W kg–1, with a capacity retention of 96% after 5000 charge/discharge cycles. The obtained results demonstrate that NC/NU-80 nanoflower composites have considerable potential for application in the field of supercapacitors.
研究领域:
材料科学
·
能量存储
·
电化学
·
纳米复合材料
·
金属有机框架（MOFs）
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JOURNAL OF SOLID STATE CHEMISTRY
·
2026
·
IF 3.2
Xiaowen Li,Chenyu Chu,Jiahua Cheng,Le Chen,Zhihui Zhang,Yong Jin,Chuan Jiang,Goujian Ji
Bromine functionalization improves low-pressure CH 4 /H 2 separation in UiO-66. • UiO-66-Br 2 shows the highest CH 4 /H 2 selectivity among the three samples. • Bromination strengthens CH 4 -framework interactions and favors CH 4 adsorption. • Bromination leads to a capacity-selectivity trade-off in the UiO-66 series. Efficient separation of CH 4 /H 2 mixtures is crucial for hydrogen purification but remains challenging because of the limited adsorption contrast between the two gases in conventional porous adsorbents. Herein, UiO-66 and its brominated derivatives, UiO-66-Br and UiO-66-Br 2 , were synthesized and systematically investigated through structural characterization, adsorption measurements, ideal adsorbed solution theory (IAST), grand canonical Monte Carlo (GCMC) simulations, and density functional theory (DFT) calculations. Bromination preserved the parent UiO-66 framework while effectively regulating the pore environment and host-guest interactions. At 273 K and 1 bar, the experimental CH 4 uptake increased from 0.809 mmol g −1 for UiO-66 to 0.938 mmol g −1 for UiO-66-Br 2 . Both IAST and binary GCMC consistently demonstrated enhanced CH 4 /H 2 separation after bromination, with UiO-66-Br 2 exhibiting the best overall performance. In particular, binary GCMC simulations yielded a CH 4 /H 2 selectivity of 14.23 for UiO-66-Br 2 at 0.1 bar, representing an approximately 73 % enhancement over pristine UiO-66 (8.23). DFT calculations further revealed that the CH 4 binding energy increased from 7.097 kJ mol −1 for BDC to 26.433 kJ mol −1 for BDC-Br 2 , indicating substantially strengthened local CH 4 -linker interactions. These results demonstrate that bromine functionalization, particularly dibromination, effectively enhances CH 4 -preferential adsorption and CH 4 /H 2 separation through the synergistic regulation of pore confinement and host-guest interactions. Download: Download high-res image (401KB) Download: Download full-size image
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ChemistrySelect
·
2026
·Vol. 11
·期 36
·e74577
·
IF 2.3
Haixia Hu,Yiying Shi,Zhongyu Duan,Wenjun Zhang
Zirconium-based metal–organic framework (MOF) UiO-66 is a commonly used host framework material in the research field of fluorescent probes. However, the pure UiO-66 material lacks functional sites for targeted recognition and thus cannot achieve specific fluorescence detection. In view of this, terephthalic acid (TPA) and 2,6-pyridinedicarboxylic acid (DPA) were used as mixed ligands to coordinate with Zr 4+ for constructing a MOF in this paper. Subsequently, 4-methyl-7-hydroxycoumarin (4-Mu) and Eu 3+ were introduced for functional modification, and UiO-66(DPA)@4-Mu/Eu 3+ fluorescent material with dual emission centers was finally synthesized. It was investigated that UiO-66(DPA)@4-Mu/Eu 3+ can serve as a dual-emission ratiometric fluorescent probe for the efficient detection of doxycycline (DOX) content in aqueous solution. Under the excitation wavelength of 365 nm, the fluorescence color of the probe system gradually changed from blue to red with the increase of DOX concentration. Further analysis revealed that the fluorescence intensity ratio I 618 /I 430 of the system was positively correlated with DOX concentration, enabling highly sensitive detection of DOX with a limit of detection as low as 2.64 µM. Graphical Zr 4+ coordinates with terephthalic acid and 2,6-pyridinedicarboxylic acid as mixed ligands. 4-Methyl-7-hydroxycoumarin is introduced together with Eu 3+ to realize functionalization. The obtained UiO-66(DPA)@4-Mu/Eu 3+ material exhibits dual-emission property and can efficiently detect doxycycline in aqueous solution, which provides a new strategy for the functional design of metal–organic frameworks (MOFs).
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122907
·
IF 7.5
Xiaoyu Ma,Tao Liu,Jiaheng Huang,Jiaqi Zhang,Chengyong Yu,Tianyong Huang
Photocatalytic CO₂ reduction is a promising route for valorizing carbon resources. In liquid-phase systems, TiO 2 suffers from limited CO₂ adsorption, high interfacial charge-transfer resistance, and rapid carrier recombination. These drawbacks hinder simultaneous improvements in efficiency and selectivity. We fabricated a TiO 2 /UiO-66/Cu ternary photocatalyst using a modified-then-loaded strategy. Amino-functionalized TiO 2 was chemically anchored to UiO-66 via N–Zr coordination, forming a robust, low-resistance TiO 2 /MOF interface while preserving the CO₂-enrichment pores of UiO-66. Cu nanoparticles were then introduced as electron traps and catalytic sites to extract photogenerated electrons from the recombination-prone Type-I heterojunction, enabling directional electron utilization. In a solid–liquid system using water as the proton source, the optimal TiO 2 /UiO-66/Cu produced 86.76 μmol·g⁻¹ CO and 9.08 μmol·g⁻¹ CH 4 after 4 h of UV–visible irradiation. The CO production rate was 7.4- and 3.8-fold higher than that of pristine TiO 2 and UiO-66, respectively. Characterization shows that N–Zr coordination reduces charge-transfer resistance, UiO-66 enriches CO₂, and Cu promotes electron capture. Together, these effects mitigate the intrinsically poor charge separation of Type-I heterojunctions and enable efficient CO 2 photoreduction. The results provide design and mechanistic insights for MOF-enabled TiO 2 composite photocatalysts.
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Yan Yin,Yueyang Xu,Konglu Guo,Peng Zhang,Yongping Zeng
Adsorptive desulfurization is one of the alternative technologies for the effective removal of sulfides from fuels. Functionalization of metal-organic frameworks (MOFs) with Cu + is extremely desirable for adsorption separation via π-complexation interaction with adsorbed molecules. Here we report that Cu + cation is significant and highly effective for adsorption desulfurization in a new type of Cu + - modified UiO-66(Zr). First, Cu 2+ was introduced via ion-exchange with H + of UiO-66-SO 3 H. Then, Cu + cation was obtained from the reduction of Cu 2+ by using vapor-induced reduction, in which vapors of reducing agents diffuse into the pores of MOFs at a lower temperature. The resulted UiO-66-SO 3 Cu(I)− 0.15 has a better adsorption capacity for thiophene compared to pure UiO-66. In the presence of toluene, the UiO-66-SO 3 Cu(I)− 0.15 also exhibits high adsorption capacity for thiophene. After recycling four times, UiO-66-SO 3 Cu(I)− 0.15 still remains a high adsorption capacity.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 7
·3134-3146
·
IF 4.5
Luo Qizhao,Li Jingjing,Yun Panfeng,Qian Libing,Zhang Jinshuai,He Chunqing,Hu Xuejiao,Jiang Haifeng
Desalination through reverse osmosis (RO) membrane is one of the most popular ways. However, conventional RO membranes meet a trade-off between salt rejection and water flux which limit their comprehensive performance. In this work, sulfonated zirconium (IV)-carboxylate metal–organic framework (MOF) material UiO-66-SO 3 H was successfully synthesized, and thin-film nanocomposite (TFN) with UiO-66-SO 3 H-incorporated polyamide (PA) layer was fabricated. Angstrom-sized UiO-66-X ion transport channels with different functional groups in TFN membranes change the membrane morphology and chemistry and accelerate the penetration of water molecules while maintaining the high ion screening effect. As a result, compared to the pristine TFC membrane, the optimized TFN-UiO-66-SO 3 H membrane exhibited an increase in water molecules permeability to 347% and still maintained a salt rejection with ~ 94.7% under 2000 ppm NaCl solution with reverse osmosis (RO) mode, leading to a great improvement of intrinsic separation properties. The improved performance was owing to the size exclusion effect and hydrophilic nature of UiO-66-SO 3 H particles. What is more, the additional water migration channels through the incorporated UiO-66-SO 3 H nanoparticles lead to a boosting water permeation and show optimized performance for desalination. Graphical abstract
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