Journal of CO2 Utilization
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2022
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IF 8.321
Nicui Yuan,Yuxin Mei,Yuwei Liu,Yating Xie,Baining Lin,Yonghua Zhou
The development of efficient and highly selective photocatalysts is a key point for the photocatalytic conversion of CO 2 . In this paper, a composite catalyst UiO-66-NH 2 /Ce(HCOO) 3 (simplified to UNH/Ce(HCOO) 3 ) was fabricated by one pot method with CeCO 3 OH as the precursor. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) characterizations results confirmed that UNH was dispersed on the surface of Ce(HCOO) 3 and strongly interacted with it via Ce-N bond. The yield of CH 4 on the optimal UNH/Ce(HCOO) 3 catalyst reached 3 times of that on pristine UNH, up to 128.81 μmol g −1 , with the CH 4 selectivity of 71.9 %, and the R electron reached 286.46 μmol g −1 h −1 . The UV–vis diffuse reflection spectra and photoelectrochemical tests results confirmed that the improved photocatalytic CO 2 reduction performance and high CH 4 selectivity could be attributed to the formation of the type-Ⅱheterojunction of UNH/Ce(HCOO) 3 with abundant Ce 3+ , which expanded the visible light absorption range, accelerated the separation and transfer rates of photogenerated charges, and thus efficiently promoted the multi-electron reduction reaction of CO 2 to CH 4 . In addition, the reaction temperature affected profoundly the cycle performance of the catalyst. The results presented here illustrated the possibility for improving the stability of UNH/Ce(HCOO) 3 -1.80 by decreasing reaction temperature.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 2
·283
·
IF 4.967
Wei Chen,Ping Zhu,Yating Chen,Yage Liu,Liping Du,Chunsheng Wu
Iodine has been widely used as an effective disinfectant with broad-spectrum antimicrobial potency. However, the application of iodine in an antibacterial polymer remains challenging due to its volatile nature and poor solubility. Herein, iodine immobilized UiO-66-NH2metal-organic framework (MOF) (UiO66@I2) with a high loading capacity was synthesized and used as an effective antibacterial additive for poly(ε-caprolactone) (PCL). An orthogonal design approach was used to achieve the optimal experiments’ conditions in iodine adsorption. UiO66@I2nanoparticles were added to the PCL matrix under ultrasonic vibration and evaporated the solvent to get a polymer membrane. The composites were characterized by SEM, XRD, FTIR, and static contact angle analysis. UiO-66-NH2nanoparticles have a high iodine loading capacity, up to 18 wt.%. The concentration of iodine is the most important factor in iodine adsorption. Adding 0.5 wt.% or 1.0 wt.% (equivalent iodine content) of UiO66@I2to the PCL matrix had no influence on the structure of PCL but reduces the static water angle. The PCL composites showed strong antibacterial activities againstStaphylococcus aureusandEscherichia coli. In contrast, the same content of free iodine/PCL composites had no antibacterial activity. The difference in the antibacterial performance was due to the different iodine contents in the polymer composites. It was found that MOF nanoparticles could retain most of the iodine during the sample preparation and storage, while there was few iodine left in the free iodine/PCL composites. This study offers a common and simple way to immobilize iodine and prepare antibacterial polymers with low antiseptic content that would reduce the influence of an additive on polymers’ physical properties.Keywords:UiO-66-NH2metal-organic framework;iodine;poly(ε-caprolactone);antibacterial
研究领域:
材料科学
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生物学
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医学
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Zimu Liu,Mingtai Li,Zitong Zhao,Yulong Yang,Linlin Deng,Baojuan Dou,Feng Bin
In recent years, the adsorption and separation of ammonia (NH 3 ) from airflow have attracted growing attention. However, there is a need to further enhance the adsorption capacity of adsorbents. In this study, the amino-functionalization of UiO-66 was investigated to evaluate its dynamic NH 3 adsorption performance by varying the type and proportion of organic ligands. It was observed that the introduction of amino groups significantly enhanced the ammonia adsorption capacity by 78.5 %, despite a minor reduction in specific surface area and pore size. Combined with the results of density functional theory and in-situ infrared, the enhanced adsorption ability can be ascribed to the functionalization increasing the polarity within the pore, thereby strengthening interactions with ammonia molecules through weak hydrogen bonding.
研究领域:
环境科学
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材料科学
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化学工程
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吸附技术
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DOI
高影响因子
FOOD CHEMISTRY
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2024
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IF 8.5
Qiyue Zhao,Hong-Man Hou,Gong-Liang Zhang,Hongshun Hao,Bei-wei Zhu,Jingran Bi
Heterocyclic aromatic amines (HAAs), arising as chemical derivatives during the high-temperature culinary treatment of proteinaceous comestibles, exhibit notable carcinogenic potential. In this paper, a composite aerogel (AG D-UiO-66 ) with high-capacity and fast adsorption of HAAs was made with anchoring defective UiO-66 (D-UiO-66) mediated by lauric acid on the backbone of cellulose nanofibers (CNF). AG D-UiO-66 with hierarchical porosity reduced the mass transfer efficiency for the adsorption of HAAs and achieved high adsorption amount (0.84–1.05 μmol/g) and fast adsorption (15 min). The isothermal adsorption model demonstrated that AG D-UiO-66 belonged to a multilayer adsorption mechanism for HAAs. Furthermore, AG D-UiO-66 was successfully used to adsorb 12 HAAs in different food (roasted beef, roasted pork, roasted salmon and marinade) with high recoveries of 94.65%–104.43%. The intrinsic potential of AG D-UiO-66 demonstrated that it could be widely applicable to the adsorption of HAAs in foods.
研究领域:
食品科学
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材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Wenmin Li,Tingting Xu,Fangmeng Sheng,Yue Wang,Yifan Li,Yuan Xia,Bin Wu,Xingya Li,Tongwen Xu
The selective separation of monovalent ions remains a challenge because of the similar sub-nanometer sizes. Metal-organic frameworks (MOFs) are promising candidate membranes for ion selective separation based on the angstrom sized windows for size sieving. Here, to further enhance the monovalent ion selectivity , 1, 5-naphthalenedisulfonic acid tetrahydrate (NTDS) molecules with sulfonate groups are incorporated to offer a binding affinity, generating a UiO-66@NTDS membrane via the window-cavity structure confinement. In addition to the size sieving effect, the charge and affinity interaction can compensate the energy loss induced by the ion dehydration. Thus, the UiO-66@NTDS membranes exhibit elevated separation performance compared to the original UiO-66 membranes under the concentration gradient driven, accompanied by high monovalent cation permeation rates (i.e., 0.3–0.7 mol m −2 h −1 ) and mono-/divalent cation selectivities (i.e., ∼73 for K + /Mg 2+ , ∼57 for Na + /Mg 2+ , and ∼46 for Li + /Mg 2+ ). This work provides guidelines for the development of efficient ion-selective MOF membranes via the combination of size sieving and interaction attraction.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Processes
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2023
·Vol. 12
·期 1
·64
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IF 3.5
Zehui Zhao,Guangmin Ren,Xiangchao Meng,Zizhen Li
In order to achieve efficient photocatalytic N2reduction activity for ammonia synthesis, a photochemical strategy was used in this work. UiO-66 was prepared through the solvothermal method and further loaded with Au nanoparticles (Au NPs) onto the UiO-66 (Zr) framework. The experimental results verified that there were metal–support interactions between Au NPs and UiO-66; this could facilitate charge transfer among Au NPs and UiO-66, which was beneficial to enhance the photocatalytic activity. The best N2fixation effect of Au/UiO-66 with a loading of 1.5 wt% was tested, with a photocatalytic yield of ammonia of 66.28 μmol g−1h−1while maintaining good stability. The present work provides a novel approach to enhancing photocatalytic N2fixation activity by loading NPs onto UiO-66.
研究领域:
材料科学
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化学工程
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催化
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纳米技术
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Siyu Liu,Jianhua Zu,Gang Han,Xiaohan Pan,Yi Xue,Jingjie Diao,Qing Tang,Mingjie Jin
137 Cs is a radioactive pollutant in the production of wastewater from nuclear power plants. In this study, a rapid and simple in-situ synthesis new method was employed to prepare a novel AMP-functionalized UiO-66 composite material for the selective capture of 137 Cs from low-level radioactive wastewater. Characterization techniques such as SEM-EDS, FTIR, XRD, TG, and BET were used to confirm the successful loading of AMP on the surface of UiO-66. UiO-66/AMP showed a good removal effect in pH4-11. At pH7, the effects of different parameters, such as the initial Cs concentration, the ratio of the amount of adsorbent to the volume of solution, and the adsorption time were investigated. The adsorption efficiency is 96.7%, the maximum adsorption capacity is 94.9 mg/g and has fast adsorption kinetics (90% Cs + removal within 5 min). The adsorption data conformed to the pseudo-second-order kinetic model and Langmuir isotherm model, suggesting a monolayer homogeneous adsorption process. XPS helps confirm that the adsorption mechanism is the ion exchange between Cs + and NH 4+ ions. Particularly, in the adsorption experiments of 137 Cs, UiO-66/AMP demonstrated good selectivity (K d Cs : 5.8 × 10 3 ∼ 1.26 × 10 4 mL/g) towards trace Cs + in a mixed ion solution with a molar ratio of 1 (Cs): 2.18 × 10 15 (Na): 4.6 × 10 14 (K): 2 × 10 14 (Mg): 2 × 10 14 (Ca), indicating its potential for selective capture of 137 Cs from low-level liquid waste (LLLW).
研究领域:
环境科学
·
核化学与放射化学
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2021
·Vol. 168
·期 5
·057526
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IF 4.316
Mengmeng Xu,Yuhua Dong,Jianbin Zheng
In this article, a core–shell CuPd@UiO-66-NH2 composite material was synthesized by a double-solvent reduction method, and an N2H4 electrochemical sensor based on CuPd@UiO-66-NH2 was constructed. The relationship between the morphology, type, composition, size of the sensor interface composite material and its electrocatalytic performance and sensor response performance was studied, and a new method for detecting N2H4 was established. The surface properties and composition of the materials were studied by transmission electron microscope(TEM),energy dispersive X-ray spectroscopy(EDX) and X-ray diffraction spectroscopy(XRD). The results showed that the synthesized CuPd@UiO-66-NH2 has a regular 3D structure, particle dispersion, and uniform particle size, the particle size is about 90 nm. Electrochemical performance studies showed the sensor is made into detecting N2H4 in a linear range of 0.25 μM ∼ 1.39 mM, with a sensitivity of 386.7 μA·mM−1·cm−2, and a detection limit of 0.08 μM(S/N = 3). Compared with other electrochemical sensors based on metal nanoparticles to detect N2H4, the new sensor exhibited a wider linear range; and its sensitivity was 3 times of that obtained by the Cu-BTC/OMC/GCE. So, the sensor can be used as a potential sensing material to detect hydrazine.
研究领域:
材料科学
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分析化学
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电化学
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2022
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IF 3.428
Yanbing Yin,Yang Liu,Zhaosong Xin,Guopeng Xu,Yongming Feng,Bei Jiang,Xifeng He,Hongbo Zhang,Jie Ma
A new type aminophthalocyanine was synthesized and loaded on MOFs material UiO-66-NH 2 by impregnation method to synthesize a new type binary composite catalyst AmCoPc/UiO-66-NH 2 . It was systematically characterized by X-ray powder diffraction (XRD), Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM) and N 2 adsorption desorption. The synthesized catalyst was applied to the photocatalytic degradation of methylene blue dye under visible light. Compared with AmCoPc or UiO-66-NH 2 monomer performance, the synthesized AmCoPc/UiO-66-NH 2 composite significantly enhanced the degradation of methylene blue (MB), the best degradation efficiency was 90.32%. The reason is that the synergistic effect of AmCoPc and UiO-66-NH 2 effectively improves the light utilization efficiency. The desirable properties such as the positive catalytic activity of the central ion and the high specific surface area of the composites accelerate charge transport and reduce charge recombination.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Surfaces and Interfaces
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2023
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IF 6.2
Fan Xiao,Ming Cao,Yingbo Chen
The synthesis of ultra-thin, uniform and continuous polyamide (PA) membranes is a crucial prerequisite for enhancing their desalination performance. Research has indicated that effectively slowing down the interfacial polymerization (IP) reaction and promoting the interface stability are key strategies for achieving ultra-thin, uniformly nano-structured membranes with excellent performance. Herein, we have demonstrated the successful design of a continuous and uniform PA membrane, ranging from 10 to 20 nm, by utilizing the UiO-66-(OH) 2 n-hexane dispersion as a transition layer to regulate IP reaction and enable efficient water-salt separation. The results showed that the presence of the transition layer facilitated a bidirectional diffusion-contact reaction between the two monomers, resulting in improved interface stability and alleviating the occurrence of severe IP that may lead to heterogeneous membrane structures. As a result, the PA active layers formed through this approach exhibited superior thinness and uniformity compared to those produced via traditional IP methods. Moreover, the transition layer enabled uniform pre-polymerization of UiO-66-(OH) 2 at the reaction interface by pre-exposing it to down-diffusing acyl chloride monomers. This ensured the continuity of membrane structure while creating additional free volume within the membrane. This work presented a scalable method for manufacturing ultra-thin, defect-free, homogeneous, and high-performance nanofiltration membranes.
研究领域:
材料科学
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膜技术
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化学工程
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DOI
高影响因子
Desalination and Water Treatment
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2024
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IF 1
Yannan Jia,Jiacheng Li,Zijie Wang,Xiaomei Wu,Kai Xu,Zheng Wang
Metal-organic framework UiO-66-NH 2 was studied as an adsorbent for effective boron removal from desalination seawater for the first time. First, UiO-66-NH 2 was synthesized using the solvothermal method and then characterized in terms of N 2 adsorption/desorption isotherms, zeta potential, scanning electron microscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, and thermogravimetric analysis. Based on the experimental design of response surface methodology, the adsorption of boron on UiO-66-NH 2 was optimized using three independent variables: adsorbent dosage (60–80 mg/L), pH (5–7), and temperature (298–318 K). Under the optimized conditions, the maximum adsorption capacity was predicted to reach 24.54 mg/g. Investigation of the kinetics and isotherms revealed that the pseudo-second-order kinetics model and the Langmuir isotherm can well cover the adsorption data of boron. Thermodynamic parameters showed that the adsorption of boron by UiO-66-NH 2 is spontaneous and feasible. UiO-66-NH 2 also exhibits good reproducibility. It is a highly practical sorbent that can be used to remove boron from desalination seawater.
研究领域:
环境科学
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材料科学
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化学工程
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水处理技术
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吸附科学
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DOI
高影响因子
PLASMA SCIENCE & TECHNOLOGY
·
2023
·Vol. 25
·期 8
·085505
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IF 1.7
Tian ZHOU,Douhao YANG,Yijun WANG,Jiushan CHENG,Qiang CHEN,Bowen LIU,Zhongwei LIU
Defect engineering of metal-organic frameworks has attracted increasing attention in recent years for potential applications in gas storage and catalysis. In this study, defective UiO-66 is obtained by Ar and H2 plasma treatments. Compared with the pristine UiO-66, a new aperture with a size of ∼4 nm appears for a sample with the plasma modification, indicating the formation of mesopores within UiO-66 framework. Characterization results demonstrate that the pore volume, surface area and the number of Lewis and Brönsted acid sites can be easily tuned by varying the discharge parameters. The adsorption performance of UiO-66 is evaluated for the adsorption of methyl blue. In comparison to the pristine UiO-66 and the sample with H2 plasma treatment, the Ar plasma modified sample shows excellent adsorption activity due to the suitable pore size and volume. Equilibrium adsorption capacity as high as 40.6 mg·g−1 is achieved for the UiO-66 (Ar) sample.
研究领域:
材料科学
·
环境科学
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化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）