JOURNAL OF SOLID STATE CHEMISTRY
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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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高影响因子
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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高影响因子
Coatings
·
2022
·Vol. 12
·期 12
·1939
·
IF 3.236
Feng Tian,Rengui Weng,Xin Huang,Guohong Chen,Zhitao Huang
Metal-organic frameworks (MOFs) are highly crystalline inorganic-organic complexes formed from metal ions or metal clusters and multi-toothed organic ligands. MOFs have great potential for use in antibacterial materials in the biological, environmental, and food antimicrobial fields. They can act as a reservoir of metal ions, releasing them gradually and leading to a sustained antibacterial effect analogous to that proposed for metal oxide nanoparticles (NPs). Herein, UiO-66-NH2as a type of MOF was first prepared by a facile solvothermal method and then loaded with Ag NPs to form a Ag/UiO-66-NH2composite and the different materials were synthesized by controlling silver doping amount, which are then applied to an antibacterial test. Works on the synthesis of Ag/UiO-66-NH2and its antibacterial test were not reported before. The synthesized materials were characterized using the field emission scanning electron microscope (FE-SEM), X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET), thermal gravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS) techniques. The antibacterial activity of the Ag/UiO-66-NH2was then assessed againstE. coli(gram-negative bacteria) and Staphylococcus aureus (gram-positive bacteria), using the inhibition zone (ZIO) method and optical density (OD) method. The obtained results have shown that the introduction of Ag does not interfere with the crystallization of UiO-66-NH2. The FT-IR spectral profiles recorded for the UiO-66-NH2samples fabricated under conditions of varying silver ion doping levels are similar to those recorded for UiO-66-NH2. The thermal stability of UiO-66-NH2containing varying amounts of silver ions was lower than the thermal stability of UiO-66-NH2. However, under these conditions, the specific surface area and pore volume increased. The antibacterial performance of UiO-66-NH2improved significantly following the process of silver ion doping. The best antibacterial performance was observed when the silver ion content was 4 wt.%. Overall, we synthesized a new nanocomposite material with broad-spectrum bacterial sterilization, which was easy to manufacture.Keywords:silver;metal-organic frameworks;UiO-66-NH2;antibacterial properties
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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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Surfaces and Interfaces
·
2023
·
IF 6.2
Ning Liu,Bin Hu,Kexin Tang,Tingyu Xia,Fei Li,Guixiang Quan,Xiaodong Zhang,Liang Tang
In the pursuit of restoring and preserving our planet's natural equilibrium, the development of photocatalytic agents with exceptional aptitude for CO 2 reduction stands as an essential undertaking, which would be greatly facilitated with the energy regeneration and environmental purification. Herein, a composite material HTiNbO 5 /UiO-66 (UTi) was amalgamated by a one-step solvothermal method. The resultant composite material exhibited remarkable improvement on the photoreduction efficiency of CO 2 reduction compared with pristine UiO-66 and HTiNbO 5 . Impressively, UTi composite with 3 wt% HTiNbO 5 (UTi-3) illustrated the highest CO 2 photoreducation activity to CO, the CO yield of UTi-3 was about 9.3 and 11.2 times higher than that of pure UiO-66 and HTiNbO 5 , respectively. The significantly improved photocatalytic performance could be ascribed to the enlargement of specific surface area, the improved visible-light absorption range and shrinkage of the energy band gap, which can increase photogenerated electron production to promote the reduction reaction of CO 2 to CO. The insights obtained from this study can guide the application of semiconductor composites in the field of CO 2 photocatalytic reduction, so as to design high efficiency 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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OPTICAL FIBER TECHNOLOGY
·
2022
·
IF 2.8
Zizheng Yue,Luqiao Feng,Wenlin Feng
In this work, a novel Michelson interferometer (MI) based on the core-offset splicing between the single-mode fiber (SMF) and thin-core fiber (TCF) is proposed and experimentally demonstrated. By using the layer-by-layer self-assembly method, a novel metal-organic framework UiO-66 film is coated on the TCF surface. Then, the MI for fluoride-ion detection is obtained. The adsorption of fluoride ions by the sensing film induces the change in the effective refractive index (RI) of the coated cladding, which results in the regular redshifts of the interference dip. Different fluoride-ion concentrations can be obtained in real-time by monitoring the dip wavelength shifts. The proposed sensor exhibits an excellent linear response in the fluoride-ion concentration range up to 0.1 ppb, a high sensitivity of 612 pm/ppb and a fast response time of 10 s.
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Carbon Letters
·
2022
·Vol. 32
·期 3
·875-884
·
IF 3.117
Lin Xiaoying,Zeng Weipeng,Chen Yilan,Su Ting,Zhong Qinhua,Gong Linzhu,Liu Yamin
A porous-carbon material UiO-66-C was prepared from metal–organic frameworks UiO-66 by carbonization in inert gas atmosphere. Physicochemical properties of UiO-66-C materials were well characterized by Powder X-ray diffraction (PXRD), Scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FT-IR), Raman spectrometer, N 2 adsorption/desorption isotherms (BET), and the adsorption properties of the products were studied UiO-66-C has a high specific surface area up to 1974.17 m 2 /g. Besides, the adsorption capacity of tetracycline could reach 678.19 mg/g, the adsorption processes agreed well with the pseudo-second-order kinetic model and Langmuir isotherm model.
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INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Haojie Zhao,Beili Yi,Xiaomeng Si,Wenda Bao,Lei Cao,Longxing Su,Yanli Wang,Lien-Yang Chou,Jin Xie
Metal–organic frameworks (MOFs), a new type of porous material, have shown many possible applications in gas storage and separation, biomedicine, catalysis, and so on. While most MOFs are synthesized through solvothermal synthesis where a large quantity of organic solvent is used, the green synthetic approach using a minimized amount of solvent is important to prevent irreversible environmental compacts. In this study, we successfully synthesized Zr-MOFs with SBUs (e.g., UiO-66 and MIL-140A) using a simple metal source and investigated the role of organic modulators in modulating the MOF structures during solid-state synthesis. Meanwhile, UiO-66 rich in defects synthesized via a solid-state conversion strategy shows good catalytic performance for the ring-opening of epoxides with alcohols. This work contributes to the understanding of the role of organic modulators in the solid-state synthesis of MOFs.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zun Man,Yang Meng,Xiaochang Lin,Xiaorong Dai,Leiping Wang,Dezhao Liu
The photocatalytic activity of titanium dioxide (TiO 2 ) for the purification of odour pollutants, containing reduced sulfur compounds (RSCs), could be largely improved by the coupling of porous materials. Herein, UiO-66@TiO 2 nanocomposites with different blending ratios were synthesized via a readily solvothermal method and characterized experimentally by XRD (X-ray diffraction), SEM (scanning electron microscope), FTIR (Fourier transform infrared spectrum), N 2 isotherms, and UV–vis DRS (diffuse reflectance spectra). The photodegradation performance of dimethyl sulfide (DMS) by synthesized UiO-66@TiO 2 was investigated under various photodegradation conditions, including photocatalyst dosage, DMS concentrations and relative humidity. The results showed that the U1T3 (UiO-66:TiO 2 = 1:3) composites exhibited the highest photocatalytic activity, which was about 17.8 and 7.1 times higher than that of pristine UiO-66 and TiO 2 , respectively. This indicates that the intimate contact interfaces between UiO-66 and TiO 2 could promote the separation and migration efficiency of photogenerated electron-hole pairs. When relative humidity increased from 0% to 60%, the photocatalytic activity was enhanced because the moisture could assist to produce more hydroxyl radicals. However, when the relative humidity was further increased to 90%, the excessive water would compete with DMS on the surface of UiO-66 and subsequently weaken the photocatalytic effects. During the cycling experiments, U1T3 showed a stable photocatalytic performance, and the plausible photocatalytic reaction mechanism and reaction pathways of DMS were proposed. With a significant enhancement of photocatalytic performance, UiO-66@TiO 2 nanocomposites could promote the practical applications of MOF-based photocatalysts for the degradation of DMS.
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JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Peng Zhang,Yueyang Xu,Konglu Guo,Yan Yin,Jilong Wang,Yongping Zeng
Adsorption desulfurization represents an alternative technology for the effective removal of thiophenic compounds from fuels. Metal−organic frameworks have been the ideal candidates for the adsorptive desulfurization of fuel due to the high surface areas. Pristine UiO-66 is thought to be appropriate for the removal of small thiophenic compounds. This work developed a new type of hierarchical-pore (micro and mesopores) UiO-66 with a higher specific surface area and porosity for the removal of larger adsorbates using MOF-5 as the template. To enhance adsorption desulfurization performance, the Ag + -exchanged hierarchical-pore UiO-66 (HP-UiO-66-SO 3 Ag) with π-complexation was synthesized by the ion-exchange method. The HP-UiO-66-SO 3 Ag samples were characterized by FTIR, XRD, SEM, TEM, and N 2 adsorption–desorption isotherms. Compared with the original UiO-66, the HP-UiO-66-SO 3 Ag has a higher specific surface area, pore volume, and pore size. The static adsorption experiments showed that HP-UiO-66-SO 3 Ag had a high adsorption capacity for thiophene and benzothiophene . Moreover, the HP-UiO-66-SO 3 Ag sample still exhibits high adsorptive performance in the presence of toluene. The regeneration results show that about 90% of the initial adsorption capacity of HP-UiO-66-SO 3 Ag can be regenerated after four cycles.
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高影响因子
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