JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Gao Shuang,Yu Yue,Li Yun-heng,Yao Sheng-yi,Song Ya-kai,Niu Lu-hao,Chen Xiao-lu
A series of molybdenum-based catalysts were prepared using UiO-66 modified with functional ligands as a carrier. The catalyst structure was characterised using XRD, FT-IR, N 2 adsorption desorption isotherms, TEM and XPS. The introduction of -F atom expanded the pore structure of catalyst and increased the specific surface area, resulting in a greater number of active site and more dispersion. The introduction of functional ligands (-F, -NO 2 ) enhanced the electron attraction capacity of catalyst, and improved the microenvironment around the active centre of the catalyst, which contributed to enhance the catalytic performance. The effect of catalyst structure on catalytic activity was investigated using the removal of dibenzothiophene (DBT) from simulated oils as a probe reaction. Under the optimum reaction conditions, the catalyst (UiO-66-NO 2 -F-MoO 3 ) was found to be the most effective for the DBT conversion, reached 99.1%. After 5 desulfurization experiments, the desulfurization activity of the catalyst cound still reach 90.6 %, indicating that the catalyst had good cyclic stability, which was closely connected to the hydrophobicity of the -F atom. The introduction of -F atom improved the hydrophobicity of the catalyst so that the generated sulfone was not easy to be adsorbed on the active site and improved the cyclic stability of the catalyst. Furthermore, the increase in the number of Mo active species was important in improving the cyclic stability of the catalyst.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Yucheng Liu,Dong Gan,Mingyan Chen,Lili Ma,Bing Yang,Lingli Li,Meng Zhu,Wenwen Tu
A composite material constructed by intercalating super-hydrophilic UiO-66 into the graphene oxide (GO) nanosheets was synthesized under the modification of polydopamine (PDA), and the PDA/RGO/UiO-66 hybrid membranes with enhanced water permeability, favorable dye separation performance and anti-fouling property were prepared on the cellulose acetate (CA) substrate by vacuum-assisted filtration method. In this work, UiO-66 nanoparticles (NPs) were introduced into the GO interlayers to inhibit their accumulation, while PDA was used to partially reduce GO and ensure the stability of the composite material. The prepared powder samples and composite membranes were subjected to PXRD, FT-IR, SEM, AFM, XPS, WCA characterizations and zeta potential tests, respectively. The results indicated that PDA/RGO/UiO-66 complex films presented more hydrophilicity with a pure water flux as high as 167.14 L/(m 2 ·h), which increased by 256.91% compared to the PDA/RGO membrane and maintained a high dye separation performance (99.54% for MB and 87.36% for CR). Also, the improvement in surface hydrophilicity of the membrane was advantageous for heightening its fouling resistance. In general, the PDA/RGO/UiO-66 composite membranes synthesized in this paper have great potential for efficient separation and purification of dye wastewater.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Wenjing Li,Mengqing Xu,Zhuoyun Xia,Zheng Wang,Yingying Feng,Hui Li,Chuang Jiang,Yingnan Liu
The highly selective and sensitive detection of paraoxon residues at low environmental concentrations remains challenging. Herein, a novel fluorescent metal-organic framework composite (Ce 4+ @UiO-66-NH 2 ) with excellent phosphatase-like activity was developed to catalyze the hydrolysis of paraoxon into yellow p -nitrophenol ( p -NP), which quenched the composite's blue fluorescence via the inner filter effect. Based on this mechanism, a simple, portable, non-biological colorimetric/fluorescent hydrogel nanosensor (CM-SA spheres) was constructed by incorporating red fluorescent Mn-CDs with aggregation-induced emission as an internal reference. Upon increasing paraoxon concentration, the spheres showed visible color changes from colorless to yellow under daylight and blue to red under UV light. The sensor demonstrated a visual detection sensitivity of 0.05 μg mL −1 and limits of detection of 0.013 μg mL −1 (daylight) and 0.027 μg mL −1 (UV). In real sample analyses of tea and water, the CM-SA spheres exhibited strong anti-interference capability and reliability, offering a practical strategy for paraoxon degradation and detection.
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高影响因子
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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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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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Doudou Dong,Weiliang Xu,Yuanhang Jin,Huan Yu,Rui Yao,Guining Chen,Yanan Guo,Haipeng Zhu,Gongping Liu,Yanshuo Li,Wanqin Jin
Currently, separation of ester/alcohol azeotropes such as methyl methacrylate (MMA)/methanol is a typical energy-intensive process using distillation technology. In principle, pervaporation membrane technology can separate azeotropes with higher energy efficiency, while the membrane performance could not meet the application requirement. We reported a new type of MOF ligand side group regulated UiO-66/PDMS mixed-matrix membranes (MMMs) to selectively separate MMA from the its methanol azeotrope. The incorporation of UiO-66 fillers improved the MMA/methanol performance of PDMS membrane. The results of molecular simulation and characterizations revealed that compared with the pristine UiO-66 and UiO-66-CH 3 , amino groups of UiO-66-NH 2 showed stronger interaction energy and thus higher affinity towards MMA molecule. Therefore, although the pore size of UiO-66-NH 2 is larger than the molecular kinetic diameters of MMA and methanol, the tunable chemical environment and molecular interaction promoted the selective transport of MMA. The optimal UiO-66-NH 2 /PDMS MMM displayed an outstanding separation performance with a total flux of 2.07 kg m −2 h −1 and a separation factor of 5.7 for 18 wt% MMA/methanol azeotrope at 40 °C. The membrane exhibited an excellent long-term performance during continuous separation process of ∼3400 h, and showed potential in scale-up fabrication and separation of other ester/alcohol azeotropes. The proposed MOF ligand side group regulation offers a promising strategy to develop high-performance membranes for azeotropic separation.
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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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Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 26
·15803-15813
·
IF 10.7
Huiling Wang,Qiang Li,Jing Chen,Hongpeng Jia
Resource utilization of carbon dioxide (CO2) is an effective strategy to mitigate global warming and achieve carbon neutrality and peak carbon goals. It is well known that different preparation methods affect the catalytic performance of catalysts. Herein, we designed an efficient Ru–ZrO2/C catalyst for photothermal catalytic CO2 reduction by pretreating UiO-66 in a N2 atmosphere and then loading Ru species. Compared to the reference sample of Ru/ZrO2 obtained by calcining UiO-66 in an air atmosphere, Ru–ZrO2/C exhibits much superior catalytic activity under full-spectrum light irradiation with a methane yield of 504.1 mmol g−1 h−1 and selectivity of 98.9%, respectively. In addition, the catalytic performance of Ru–ZrO2/C for photothermal CO2 methanation remains stable without obvious reduction in a 24 hour continuous test. The physicochemical characterization studies of Ru–ZrO2/C determine that the remarkable heat resistance, effective light-heat conversion ability, abundant oxygen vacancies, low-valence Ru, and good CO2 adsorption properties are responsible for the enhanced performance of photothermal CO2 hydrogenation. This work expands the application of MOFs as precursors and provides an effective guide for designing highly efficient photothermal catalysts for solar fuel production.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Ping Tan,Niling Zou,Jiakang Sun,Liangjun Long,Yuhan Li,Jiayuan Yu
Zirconium-based Metal-Organic Frameworks (Zr-MOFs) have attracted significant attention for phosphate removal due to their large specific surface area and abundant active sites. In this study, amino-modified Zr-MOFs were synthesized and used for phosphate removal, with a focus on investigating the relationship between the physicochemical structure of the amino-modified Zr-MOFs and phosphate adsorption, as well as the role of the amino groups. A series of amino-modified Zr-MOFs (UiO-67) were synthesized and characterized, with particular emphasis on the variant with one amino group functionalization on a defect-rich framework, designated as DUN. The results reveal that amino modification of defective UiO-67 (DUN) increases the number of phosphate adsorption sites per unit mass and specific surface area, thereby enhancing phosphate adsorption capacity, which is significantly higher than that of other synthesized UiO-67 variants. The role of amino group not only enhances the affinity for phosphate and the adsorption efficiency at low phosphate concentrations but also accelerates the phosphate adsorption rate. Through comprehensive characterization and DFT simulations, the superior performance of DUN is primarily attributed to the synergistic effects of its structural defects, carboxyl groups, and introduced amino functionalities. The defects at Zr nodes in DUN contribute significantly to phosphate adsorption by providing Zr-OH groups and oxygen vacancies. Concurrently, the carboxyl groups present in the DUN's ligand linkers engage in hydrogen bonding interactions with phosphate. The amino groups, a novel addition to the DUN structure, not only provide additional adsorption sites but also significantly enhance the strength of the existing hydrogen bonds and the Zr-O-P coordination interactions. This study sheds light on the intricate relationship between the physicochemical structure of Zr-MOFs and their phosphate adsorption capacity, providing a theoretical basis and practical approach for developing efficient Zr-MOF-based adsorbents for water purification.
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Journal of Cleaner Production
·
2024
·
IF 9.7
Yang Lv,Shaopeng Wu,Haiqin Xu,Na Li,Quantao Liu,Huan Wang,Yingxue Zou,Qi Jiang,Serji Amirkhanian
The adsorption kinetics and molecular dynamics were modeled based on the structure-assembled technique of MOFs , conjugate bonding and targeted adsorption of characteristic pollutants. The mechanism of interaction between UiO-66 and rubber-modified asphalt (RMA) was simulated. The adsorption characteristics between UiO-66 and five class I carcinogens, high concentration VOCs components were simulated by Sorption module. The conjugate bonding and targeting adsorption mechanism between UiO-66 on VOCs was elucidated by combining the GC-MS analysis data. The results were showed that the interaction between UiO-66 and rubberized asphalt was influenced by the number of molecules, contact area, spatial site resistance, and active groups. The content of UiO-66 should be controlled below 3.31 %. The small size of vinyl chloride molecules made it easier to enter the pore structure of UiO-66 with a maximum inhibition rate of 91.75 %. The 1,2-dichloropropane has a large molecular size, spatial site resistance, non-conjugation effect, and the smallest adsorption amount of 72.2 %. The total concentration of VOCs was decreased from 726.38 mg/cm 3 to 166.12 mg/cm 3 , a reduction of 77.13 %. The adsorption of UiO-66 on VOCs molecules was affected by molecular size, carbon chain length, conjugation effect, polarity and other factors. VOCs and UiO-66 form a p-d, d-d π conjugation effect based on the conjugated structure, targeting adsorption within the benzene ring of the organic framework.
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RSC Advances
·
2024
·Vol. 14
·期 38
·28148-28159
·
IF 3.9
Lidi Gao,Xinran Qu,Shuang Meng,Mo Chen,Yuxin He,Fuquan Zhao,Hongtao Chu,Shili Qin,Fenglong Jin
The excellent stability of covalent organic frameworks (COFs) and the diversity of metal organic frameworks (MOFs) make MOF/COF hybrid materials promising candidates for chromatographic stationary phases. In this paper, a TpBD/UiO-66-NH2 hybrid material was synthesized through a Schiff-base reaction between TpBD COFs and UiO-66-NH2 MOFs; characterized using Fourier-transform infrared spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy; and bonded to a capillary to prepare a TpBD/UiO-66-NH2-bonded open tubular capillary electrochromatography (OT-CEC) column. Results suggested that the hybrid material had the crystal morphology of a single COF and MOF, a micro–mesoporous structure, and good thermal stability. The inner surface of the OT-CEC column was tightly and uniformly distributed with the stationary phase (∼1.5 μm). The baseline separation of 13 amino acids and three families (4 acidic antibiotics, 4 preservatives and 6 sulfonamides) of emerging pollutant mixtures was achieved due to the synergistic effect of TpBD and UiO-66-NH2 in the stationary phase. The OT-CEC column showed good reproducibility and stability with relative standard deviations of migration time and resolutions in the range of 1.17–3.93% and 1.79–4.31%, respectively.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Qin Cheng,Jinping Gan,Kai Cai,Ming Xia,Yi Wu,Shanshan He,Pan Cheng,Qihao Guo,Ke Liu,Dong Wang
High-quality polyamide (PA) nanofiltration (NF) membrane with excellent selectivity and permeability is of great research significant because of their high practical application value, especially for the precise separation of divalent and monovalent ions, such as Mg 2+ and Li + . Herein, UiO-66-NH 2 nanoparticles (NPs) decorated ethylene vinyl alcohol copolymer (EVOH) nanofiber substrate (M-NFM) was utilized to construct high-quality Janus NF membrane through interfacial polymerization (IP) reaction using polyethyleneimine (PEI) and piperazine (PIP) as aqueous phase monomers and trimesoyl chloride (TMC) as organic phase monomers. The incorporation of UiO-66-NH 2 NPs significantly influenced the hydrophilicity, surface morphology, and pore structure of the substrate, thereby enhancing the properties of the resulting NF. Optimally prepared membranes demonstrated improved separation performance, permeability, stability, and antifouling characteristics compared to the unmodified substrate. Notably, at a Mg 2+ /Li + ratio of 30, the resultant NF membrane achieved a separation factor (S Mg 2+ /Li + ) of 28.4 and a salt permeation flux of 156.8 L·m -2 ·h -1 ·MPa -1 . Additionally, the membrane exhibited over 98% rejection rates for FeCl 3 , CuSO 4 , CaCl 2 , MgSO 4 , MgCl 2 and Na 2 SO 4 with fluxes exceeding 150 L·m -2 ·h -1 ·MPa -1 , highlighting its effectiveness in rejecting multivalent ions. This research presents a simpler and more reliable approach to the fabrication of high-quality Janus PA NF membrane, offering promising potential for industrial-scale applications.
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