Materials Today Chemistry
·
2023
·
IF 7.3
Mao Guo,Siyang Dong,Jing Xiong,Xuanyang Jin,Pengfei Wan,Shengjun Lu,Yufei Zhang,Jian Xu,Haosen Fan
Flexible core-shell polyacrylonitrile (PAN)/carbon nanotubes (CNTs)@Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP)/Uio-66-NH 2 (PC@PU) hybrid nanofiber membrane was prepared by coaxial electrospinning technology. PAN polymer and CNTs particles were used as core to improve the membrane structure stability for further ensuring the thermal stability of the separator. PVDF-HFP and Uio-66-NH 2 nanoparticles were applied to reinforce the affinity of separator to electrolyte. The PC@PU composite membrane delivered high thermal stability and fantastic electrolyte affinity (545.76%). Furthermore, compared with Celgard 2325 commercial membrane, the PC@PU composite membrane exhibited higher porosity (80.22%) and higher Li + conductivity (3.43 mS/cm), leading to superior rate performance and long-term cycle stability. The cell with the PC@PU hybrid membrane displayed high specific capacity of 143 mAh/g at 1C and only 0.0259% capacity attenuation of each cycle after 1000 cycles. In addition, the PC@PU composite membrane demonstrated remarkable flexibility, and the cells with bent separators exhibited outstanding electrochemical performance. Hence, the PC@PU hybrid nanofiber membrane can pave a way for the further application in the field of secondary batteries separator.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Zhuanhong Jia,Xiaojun Dai,Bin Liu,Yan Li,Chunmiao Bo
Advanced adsorbents with high adsorption capacity and adsorption selectivity are desirable. Here, a Zr-based metal-organic framework (MOF), UiO-66-NH 2 @poly(sodium 4-styrenesulfonate, Nass), was synthesized using the high surface area of MOFs as a substrate and the high grafting density of surface initiated-atom transfer radical polymerization (SI-ATRP). UiO-66-NH 2 @poly(Nass) was used to adsorb different dyes. The maximum adsorption capacity ( Q m ) of methylene blue (MB) and basic fuchsine (BF) was 299.8 and 789.2 mg·g −1 , respectively, which were higher than those of Sudan I (SD I, 6.340 mg·g −1 ), neutral red (NR, 188.1 mg·g −1 ), methyl orange (MO, 199.5 mg·g −1 ), and acid chrome blue K (AK, 122.3 mg·g −1 ). The adsorption isotherms and kinetics were investigated, and it was confirmed that the Langmuir isotherm and the pseudosecond-order kinetic model fit our adsorbents. In the binary mixed solution, the removal rate (R) of MB reached 64.44%, while that of MO was only 3.340% for MB/MO. R was 64.29% for MB and 21.97% for AK for MB/AK and 97.45% for BF and 30.03% for MO for BF/MO, verifying the preferential selectivity to adsorb basic dyes. The superior adsorption was ascribed to multiple interactions, including electrostatic interaction , hydrogen bonding , and π–π accumulation. In addition, the effect of grafting poly(Nass) on the pore size of UiO-66-NH 2 was studied. The excellent stability showed that the R dropped by less than 15.62% after five consecutive cycles. The UiO-66-NH 2 @poly(Nass) was applied in the determination of MB and BF in water, crucian carp, and green shrimp. Good linearity was observed for MB (R 2 = 0.9971) and BF (R 2 = 0.9993) in the range of 0.2–30 and 0.5–50 μg·mL -1 , respectively, with satisfactory recoveries (in the range of 87.45–101.3% for MB and 90.34–98.86% for BF), achieving favorable practicability.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Zhibo Yang,Liang Zhu,Lin Chen
Core-shell structured NH 2 -functionalized UiO-66 magnetic composites (γ-Fe 2 O 3 @C@UiO-66-NH 2 ) were fabricated via a simple, facile and green approach to investigate their adsorption behaviors towards different organic dyes (methylene blue, malachite green , acid fuchsin and acid orange II). Different characterization methods containing XRD , TEM , EDXA , FTIR, BET and XPS were used to indicate that the as-prepared γ-Fe 2 O 3 @C@UiO-66-NH 2 material exhibited core-shell structure and excellent surface performance. Adsorption experiments showed that γ-Fe 2 O 3 @C@UiO-66-NH 2 could selectively adsorb anionic dyes and effectively separate the mixture, which might be mainly ascribed to the negatively-charged anionic dyes as opposite to the positively-charged Zr metal sites in γ-Fe 2 O 3 @C@UiO-66-NH 2 . The kinetics and adsorption isotherm of acid orange II and acid fuchsin adsorption in γ-Fe 2 O 3 @C@UiO-66-NH 2 were also investigated. For acid orange II and acid fuchsin, the maximum adsorption capacity obtained from the Langmuir isotherm model was 48.12 mg/g and 31.54 mg/g, respectively. Moreover, γ-Fe 2 O 3 @C@UiO-66-NH 2 exhibited good structural stability and reusability, which suggesting that γ-Fe 2 O 3 @C@ UiO-66-NH 2 as an easy-prepared adsorbent material exhibited great application potential in the selective removal of dyes from water systems.
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Chengyan Wang,Yangsai Lyu,Jia Li,Li Li,Tingting Li,Jie Yang,Ningning Xing,Xiaolei Zhang
Excessive fluorine can cause a serious threat to human health. It is significant but challenging to develop a straightforward and rapid way to simultaneously detect and remove excess F– from water. Herein, we presented a three-dimensional (3D) hierarchical UiO-66-NH2 nanoparticle/γ-AlO(OH) nanowire hybrid synthesized by a facile biotemplate route for simultaneous detection and removal of F– from water. We elaborately assembled two kinds of materials in a bioinspired 3D hierarchical structure as a functional unit to achieve detection and removal of dual functions. The outer UiO-66-NH2 nanoparticles served as a fluorescent sensor to detect and capture F– via a strong fluorescence enhancement effect caused by the electron transfer from F– and γ-AlO(OH) and acted as the capture unit of F–. The inner γ-AlO(OH) nanowire layer served as a F– absorbent through ion exchange between F– and γ-AlO(OH). The resulting UiO-66-NH2 nanoparticle/γ-AlO(OH) nanowire hybrid displayed excellent selectivity and sensitivity for F– detection (the detection range was 0–5 mM and the limit of detection was as low as 0.77 μM) and high capacity for F– removal (the maximum equilibrium adsorption capacity qmax was as high as 87.0 mg g–1). This dual-function material provided a strategy for simultaneously selective sensing and efficient removal of anionic pollutants from water.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Mengmeng Zhang,Kun Yang,Junshuo Cui,Haibiao Yu,Yuejiao Wang,Weijun Shan,Zhenning Lou,Ying Xiong
With the ever-increasing of Rare Earth Elements (REEs) in various high technology applications, efficient recovery of REEs from liquid sources is becoming significantly important. In this work, ZIF-8 and UiO-66-NH 2 (U6N) are combined to form a 3D-agaric like core-shell structure hybrid material (U6N@ZIF-8-20), which exhibits good performance in REEs extraction. Due to the abundant adsorption sites of ZIF-8 and the excellent water stability of UiO-66-NH 2 , 3D-agaric like U6N@ZIF-8-20 showed quick adsorption rate (only 10 min to reach equilibrium), high adsorption capacity and selectivity for REEs from water compared to other reported adsorbents. Maximum adsorption capacities of U6N@ZIF-8-20 for neodymium (Nd(III)), europium (Eu(III)), gadolinium (Gd(III)) and erbium (Er(III)) achieved to 249.90, 295.28, 316.22 and 340.95 mg g -1 , respectively. U6N@ZIF-8-20 has superiority in selective adsorption of REEs from Cd(II), Zn(II), Cu(II), Mn(II) and Co(II) coexistence solution. The order of adsorption capacities for REEs is in agreement with the order of their electronegativity, ionic radius and charge density. Moreover, U6N@ZIF-8-20 showed better water stability and recyclability than single MOF. Overall, MOF@MOF hybrid material has efficiency in REEs separation from solutions, and has great advantage in the application of wastewater treating.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Lin Ma,Jian Gao,Chen Huang,Xiao Xu,Lu Xu,Renhao Ding,Hongliang Bao,Ziqiang Wang,Gang Xu,Qingnuan Li,Pengyang Deng,Hongjuan Ma
Metal–organic frameworks (MOFs) with a high surface area and excellent stability are potential candidates for uranium (U) adsorption. Amidoxime (AO) is the most widely used functional group to extract U, which is usually introduced into MOFs by two-step post-synthetic methods (PSMs). Herein, MOF UiO-66-NH-(AO) was obtained by a one-step PSM with amidoximation from UiO-66-NH-(CN), which was synthesized by a new organic ligand of 2-cyano-terephthalic acid and whose morphology was octahedron and could be well controlled with the new ligand. The one-step PSM can greatly maintain the octahedron of the MOFs. What is more, UiO-66-NH-(AO) showed good adsorption performance for U, the adsorption equilibrium was obtained within 1500 min, and the adsorption capacity of U was calculated to be 134.1 mg/g according to the Langmuir model. It also had excellent selectivity for U in the presence of high concentrations of vanadium (V), ferrum (Fe), magnesium (Mg), calcium (Ca), and zirconium (Zr). The adsorption capacity of U in natural seawater was determined to be 5.2 mg/g within 8 days. The recyclability of UiO-66-NH-(AO) in simulated seawater was demonstrated for at least four adsorption/desorption cycles. The binding mechanism was investigated by the extended X-ray absorption fine structure spectroscopy, revealing that U binding occurs in a fashion η2 motif. This study provides a reliable idea for the modification of MOFs and the potential for MOF-based materials to extract U from seawater.
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shuaitian Jia,Zan Chen,Yinhui Li,Claudia Li,Cuijia Duan,Kang Hui Lim,Sibudjing Kawi
The disposal of waste lithium batteries , especially waste separators, has always been a problem, incineration and burial will cause environmental pollution, therefore, the development of degradable and high-performance separators has become an important challenge. Herein, UiO-66-NH 2 particles were successfully anchored onto bacterial cellulose (BC) separators by epichlorohydrin (ECH) as a crosslinker, then a BC/UiO-66-NH 2 composite separator was prepared by vacuum filtration. The ammonia groups (−NH 2 ) from UiO-66-NH 2 can form hydrogen bonds with PF 6 − in the electrolyte, promoting lithium-ion transference. Additionally, UiO-66-NH 2 can store the electrolyte and tune the porosity of the separator. The lithium ion migration number (0.62) of the battery assembled with BC/UiO-66-NH 2 composite separator increased by 50 % compared to the battery assembled with commercial PP separator (0.45). The discharge specific capacity of the battery assembled with BC/UIO-66-NH 2 composite separator after 50 charge and discharge cycles is 145.4 mAh/g, which is higher than the average discharge specific capacity of 114.3 mAh/g of the battery assembled with PP separator. When the current density is 2C, the minimum discharge capacity of the battery assembled with BC/UiO-66-NH 2 composite separator is 85.3 mAh/g. The electrochemical performance of the BC/UiO-66-NH 2 composite separator is significantly better than that of the commercial PP separator. In addition, -NH 2 can offer a nitrogen source to facilitate degradation of the BC separators, whereby the BC/UiO-66-NH 2 composite separator could be completely degraded in 15 days.
✓ 已验证
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2017
·
IF 3.034
Jin Luo,Fujian Xu,Jing Hu,Ping Lin,Jiping Tu,Xi Wu,Xiandeng Hou
In this work, metal organic framework (MOF) UiO-66 with strong stability in water was synthesized and used for the preconcentration of ultratrace arsenic in environment water and the precipitated UiO-66 was converted to slurry for direct determination with hydride generation-atomic fluorescence spectrometry (HG-AFS). Factors affecting the adsorption of arsenic by UiO-66, including pH, adsorption time, stability of UiO-66, masking agents together with the optimum conditions of HG-AFS were investigated in detail. The performance of UiO-66 for adsorbing arsenic was excellent at room temperature over a wide range of pH from 1 to 11, and adsorption efficiencies of > 95% could be achieved within only 5 min. Meanwhile, since conventional digestion process is avoided, the slurry sampling method is fast and convenient with greatly reduced matrix interference. Under the optimum conditions, it shows a good linear relationship between AFS intensities (I) and the concentrations of arsenic (C) (I = 547C + 61) with linear correlation coefficients better than 0.99. A precision of 3% (RSD%, n = 11) at 1 ng/mL and a limit of detection (LOD) of 0.0002 ng/mL were obtained.
✓ 已验证
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2021
·
IF 4.051
Hailin Tian,Yan Gu,Houle Zhou,Yingping Huang,Yanfen Fang,Ruiping Li,Changcun Tang
In this work, bismuth bromideoxide (BiOBr), a typical visible-light photocatalyst , was coated with Zr-based MOFs (UiO-66) to prepare the BiOBr@UiO-66 photocatalysts with different mole ratios by the solvothermal method. The core–shell BiOBr@UiO-66 photocatalysts with abundant activated sites was obtained due to the modification of UiO-66 on the surface of BiOBr. The structure and properties of the BiOBr@UiO-66 photocatalysts were characterized by several methods. The 30% BiOBr@UiO-66 photocatalysts exhibited the biggest photodegradation rate constant (k = 0.0669 min −1 ) for RhB under visible-light irradiation than pure BiOBr (k = 0.0281 min −1 ) and UiO-66 (k = 0.0041 min −1 ). Additionally, the 30% BiOBr@UiO-66 photocatalysts exhibited the enhanced photocatalytic activity and stable recyclability due to the effective electron-hole separation and synergistic effect. The photocatalytic mechanism of the BiOBr@UiO-66 photocatalysts for RhB, which contained a photosensitization process, was discussed with the trapping experiment of active species and the proposed energy band alignments.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Shusu Shen,Yang Shen,Yi Wu,Honglin Li,Chang Sun,Ganwei Zhang,Yongfu Guo
UiO-66-NH 2 is a well-known metal organic framework with high porosity and surface area, and there are modifiable reactive amino groups in its structure, it has been applied in membrane modifications. A novel composite membrane (U1gFx) is successfully prepared by depositing UiO-66-NH 2 onto polyvinylidene fluoride (PVDF) membrane, and subsequently grafting with perfluoroalkyl polyethoxy acetic acid (FPEOAA). The water contact angle of the modified membrane declines from 124.27° to 71.05°, and the under-water oil contact angle increases from 86.03° to 149.45°, indicating a good hydrophilic and oleophobic change. The modified membranes show enlarged porosity and water flux due to the introduction of UiO-66-NH 2 . The optimum membrane (U1gF10) shows excellent separation performance for various oil/water emulsions, including n -hexadecane, petroleum ether, dichloromethane and soybean oil. > 95 % oil rejection and up to 8081.9 L·m −2 ·h −1 of permeation flux are achieved under the vacuum filtration mode (0.085 MPa). While treating the n -hexadecane/water emulsion, all membranes show > 99 % oil rejection in six filtration cycles. Under a dead-end filtration mode, membrane U1gF10 gives a high relative flux recovery rate at 93 % under 0.1 MPa, its pure water flux still keeps as highly as 982.5 L·m −2 ·h −1 , even after three filtration cycles, indicating a good antifouling property and great engineering application potential.
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2017
·Vol. 4
·期 11
·1870-1880
·
IF 4.036
Yitong Han,Min Liu,Keyan Li,Qiao Sun,Wensheng Zhang,Chunshan Song,Guoliang Zhang,Z. Conrad Zhang,Xinwen Guo
Titanium in different amounts has been successfully doped into the zirconium-based metal–organic framework UiO-66 via an in situ synthesis method, resulting in a series of hybrid UiO-66-nTi MOFs. These materials maintain a relatively high crystallinity and excellent structural stability. The addition of titanium has a significant effect on the crystal size and morphology of UiO-66. The UiO-66-nTi MOFs exhibit a sphere-like crystal morphology with a smaller crystal size and a rougher surface compared to the octahedral UiO-66 crystals. The framework order and porosity of the UiO-66-nTi MOFs decrease slightly due to titanium doping. The UiO-66-nTi MOFs were studied as adsorbents for the removal of an organic dye from water. The results demonstrate that these hybrid materials have enhanced adsorption capacity for the organic dye Conge red in comparison with the parent UiO-66. UiO-66-2.7Ti with 2.7% titanium doping shows the highest adsorption capacity of 979 mg g−1, which is three times higher than that of the parent UiO-66. The strong electrostatic attraction between the positively charged surface of UiO-66-2.7Ti and the negatively charged Congo red molecules was identified as the main driving force for the high adsorption capacity.
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2025
·
IF 4.2
Kai Yan,Zhihao Yu,Yingqing Li,Mengyan Guo,Yuanyu Wang,Xuebin Lu
The efficient dehydration of fructose to 5-hydroxymethylfurfural (HMF) is a crucial step in biomass valorization, requiring solid acids with precisely balanced Brønsted acidity. Defect engineering in Zr-based metal–organic frameworks (MOFs), such as UiO-66, is well known to enhance Lewis acidity; however, its impact on tailoring Brønsted acid sites remains insufficiently understood. Here, we demonstrate that defective UiO-66 possesses a dual-origin Brønsted acid system, comprising intrinsic μ3–OH groups and water molecules coordinated to defect-generated Lewis acidic Zr centers (Zr–H2O). The concentration of these Brønsted acid sites can be finely regulated by thermal activation treatment. A volcano-shaped dependence of catalytic activity on activation temperature is observed, with an optimum at 200 °C. At moderate activation temperatures below 200 °C, the removal of physisorbed water exposes both μ3–OH and Zr–H2O sites, maximizing Brønsted acid density and HMF yield. Activation beyond 200 °C reduces both types of Brønsted acid sites, resulting in diminished catalytic performance. This study reveals the cooperative effect of defect engineering and thermal activation in tuning the Brønsted acidity of MOFs, providing a rational strategy for designing highly selective catalysts for the sustainable production of platform chemicals.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）