JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Lichuan Tan,Peng Wang,Ruowei Lu,Siwen Feng,Guangsong Yuan,Cuijuan Wang
Hollow MOFs nanoreactors with controlled shape, size, pore volume , and shell thickness have been considered as emerging materials for a variety of applications. Selecting environmentally friendly and cheap colloidal carbon (CNs) as the template, bimetallic hollow Ce/Zr-UiO-66 nanoreactors were synthesized. The PXRD , TEM , EDS and other characterization analysis proved that hollow structure was formed, accompanied with incorporating of Ce(III) in UiO-66 and the crystal morphology was good. Furthermore, bimetallic hollow Ce/Zr-UiO-66 was studied as a catalyst to catalyze the conversion of furfural (FF) to furfuryl alcohol (FAL) without exogenous hydrogen. The results showed that the hollow structure and bimetallic UiO-66 was beneficial to the catalytic reaction by modulating the ratio of Ce(III) and Zr(IV). Among then, the 1:4 ratio of Ce(III) and Zr(IV) displayed good catalytic activity, the conversion rate of FF was 95% and selectivity of FAL was 94%. This study opens a new avenue for further rational design and construction of well-performing MOFs nanoreactors.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2018
·
IF 4.427
Songjian Zhao,Dongyao chen,Haomiao Xu,Jian mei,Zan Qu,Ping Liu,Yong Cui,Naiqiang Yan
The zirconium metal-organic framework material UiO-66 was doped with Ag nanoparticles and investigated for the removal of elemental mercury (Hg 0 ) in flue gas . Physical and chemical characterization of the adsorbents showed that adding Ag did not change the crystal structure and morphology of the UiO-66. Ag doping can improve the redox activity of UiO-66, and the adsorbent exhibited high thermal stability and surface area. Hg 0 removal experiments indicated that UiO-66 exhibited the higher performance compared with P25 and activated carbon, and the addition of Ag exhibited a significant synergistic effect with the UiO-66, which had highest Hg 0 adsorption capacity (3.7 mg/g) at 50 °C. Furthermore, the Hg 0 removal mechanism was investigated, revealing that Hg 0 is removed by the formation of an Ag amalgam and channel adsorption at low temperature, and through Ag-activated oxygen oxidation and channel capture at high temperature.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2021
·Vol. 36
·期 3
·e6559
·
IF 4.105
Liang Chu,Junzhen Guo,Liyan Wang,Huiyang Liu,Jiamin Yan,Lingmei Wu,Mu Yang,Ge Wang
Due to environmental and health concerns, it is very important to develop high activity oxidative desulfurization (ODS) catalyst for petroleum purification. Recently, defect engineering of metal organic frameworks (MOFs) to generate a large number of unsaturated catalytic active sites is a very promising approach. Defective MOF has good research value as ODS catalyst. Here, UIO-66 with lots of defects can be prepared by rapid crystallization using concentrated hydrochloric acid as a modulator. The prepared UIO-66 material has good industrial applicability due to its low synthesis temperature (100°C), short synthesis time (20–30 min), large-scale preparation, and excellent catalytic performance (dibenzothiophene can be entirely removed in 6 min under the optimal catalytic conditions [25-mg catalyst, 60°C, O/S 7.5]). The obtained material exhibits not only extraordinary ODS activity of 37.6 mmol h −1 g −1 but also good cycle stability for the removal of DBT (in 7 cycles without significant loss of activity, greater than 90.2%). And for large space volume 4,6-DMDBT, it also shows excellent catalytic performance. The ODS mechanism of defect UIO-66 for DBT is explored, and it proves that hydroxyl radicals and superoxide radicals are generated and play a critical role in ODS reaction. The excellent catalytic performance of defect UIO-66 gives mainly the credit to the abundant defect sites, large specific surface area, and pore volume.
研究领域:
材料科学
·
催化化学
·
环境科学
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Lihong Wei,Yao Zhang,Jinyuan Jiang,Yinbo Yang,Hui Liu
In this work, the Br functional group on the ligand UiO-66-Br was modified with a Bi–O bond through the secondary solvothermal method, and the synthesis method of visible light catalyst UB (UiO-66-BiOBr) with high electron mobility was explored. The findings indicate that the effective charge transfer of the functional group-modified material UB is 2.98 times and 1.22 times that of BiOBr and traditional UiO-66/BiOBr heterojunctions, respectively. Under simulated sunlight irradiation, the removal rate of tetracycline can reach 88.71%, and the photocatalytic performance is 22.73 times higher than that of UiO-66-Br. Moreover, it maintains good adsorption and photocatalytic performance under different laboratory and actual engineering water environment conditions. In the complex water environment of municipal wastewater, the degradation effect reaches more than 80%. Finally, the decomposition pathways of TC and ecotoxicities of the intermediates were analyzed via combining theoretical calculation, LC–MS/MS, and T.E.S.T.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Rong Xu,Xin Liu,Chunhui Zhu,Yang Pan,Shixin Cheng,Xiuxiu Ren,Meng Guo,Jing Zhong,Quan Liu,Gongping Liu
A new amine-functionalized UiO-66/organosilica mixed-matrix membrane was fabricated and explored for pervaporation (PV) water desalination . The incorporation of amine-functionalized UiO-66 (UiO-66-NH 2 ) into the BTESE-derived organosilica networks endowed the membrane with enhanced hydrophilicity and dense network structure, leading to an improvement in water flux and NaCl rejection. The UiO-66-NH 2 /BTESE mixed-matrix membrane was proved to be highly effective for desalination of saline water in concentrations from 1 to 13 wt% of dissolved NaCl. Moreover, the membrane exhibited superior structural stability under a continuous PV desalination operation up to 100 h, delivering water permeance of >3.1 × 10 −6 mol m −2 s −1 Pa −1 combined with NaCl rejection of >99.9%. The high water permeance was mainly ascribed to the specific pore structure and the preferential interactions between pore channels and water molecules, and the excellent salt rejection was primarily based on the sieving effect. The proposed UiO-66-NH 2 /BTESE mixed-matrix membranes show great prospects as an alternative for concentrated brine desalination.
研究领域:
材料科学
·
膜分离技术
·
环境工程
·
纳米材料
·
化学工程
✓ 已验证
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 9
·2419
·
IF 3.623
Mingfei Chen,Yingxue Tu,Songhai Wu
There is an urgent need to develop catalytic degradation technologies for chemical warfare agents (CWAs) that are environmentally friendly and do not require secondary treatment. UiO-66-NH2and other metal–organic frameworks (MOFs) based on zirconium have been shown to promote the catalytic degradation of CWAs. At the same time, MOFs have been studied, and they have shown interesting properties in CWA removal because of their ultrahigh surface area, tunable structures, and periodically distributed abundant catalytic sites. However, MOFs synthesized by conventional methods are mostly powdery crystals that are difficult to process and have poor mechanical stability, which largely limit the development of MOFs in practical applications. An emerging trend in MOF research is hybridization with flexible materials. Polymers possess a variety of unique attributes, such as flexibility, thermal and chemical stability, and process ability, and these properties can be combined with MOFs to make a low-cost and versatile material that also provides convenience for the subsequent integration of such MOFs into independent substrates or textiles. In this article, we used a green and simple method to coat the surface of UiO-66-NH2with polydopamine (PDA), PDA can promote the catalytic hydrolysis of UiO-66-NH2to DMNP (a simulant of chemical warfare agents). Additionally, it can adsorb the toxic hydrolysis product p-nitrophenol, avoiding the trouble of secondary treatment. The half-life of UiO-66-NH2coated with polydopamine (UiO-66-NH2@PDA) for catalytic hydrolysis is 8.9 min, and that of pure UiO-66-NH2is 20 min. We speculate that the surface coated with PDA can improve the diffusion of DMNP to the active sites of UiO-66-NH2.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Zhilun Liu,Lei Zhao,Xu He,Shuang Lu,Ding Hou,Jun Ma,Xueyan Li,Fuqiang Guo
In this study, acetic acid (HOAc) was applied to induce missing linker defects on UiO-66 via coordination competition strategy and its role on the outstanding adsorption capacity for ketoprofen (KTP) was investigated systematically. This strategy was proved to simultaneously modulate the defect sites and increase the pore size, pore volume, and surface area of the UiO-66. The missing linker defects constructed porous structure, which dramatically enhanced specific adsorption for KTP. Results showed that the surface area of UiO-66 possessed 27 % enhancement as defect sites increased (from 875.38 to 1439.86 m 2 /g) and exhibited good linearity ( R 2 = 0.998) with adsorption capacity (from 645.5 to 1136.4 mg/g). The adsorption performance of UiO-66 on KTP was investigated on both kinetics and isotherms which were fit by the pseudo-second-order kinetic model and Langmuir model, respectively. According to the Arrhenius equation and Van't Hoff equation, the activation energy increased with missing linker defects and the adsorption is a spontaneous, exothermic and randomness–increasing process. Remarkably, the defective UiO-66 maintained high adsorption resilience across a broad pH range and demonstrated superior selectivity for KTP in the presence of competing ions and humic acid (HA). The results of characterization (FTIR, XPS) and DFT calculations indicated that the adsorption of KTP was primarily driven by chemisorption at the Lewis acid metal centers of UiO-66, accompanied by secondary interactions such as van der Waals forces and hydrogen bonding.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Yan Li,Jiangtao Liu,Kehu Zhang,Lei Lei,Zhongli Lei
A hybrid polymer–MOFs architecture UiO-66-NH2@PMAA was synthesized by tethering polymethacrylic acid (PMAA) onto the surface of the metal–organic frameworks UiO-66-NH2, and it was further employed for pectinase immobilization by electrostatic interactions. The hybrid architecture was prepared through a combination of atom transfer radical polymerization (ATRP), click chemistry and postsynthetic modification (PSM). The optimal immobilization parameters were at 25 °C and pH 4.0 with 10 U/mL of pectinase for 2 h, under which pectinase showed the highest enzymatic activity (1.215 U/mg) and protein loading (448.5 mg/g), respectively. Compared with free pectinase, the immobilized was found to exhibit higher pH, thermo, and storage stability. Additionally, the immobilized pectinase had remarkable reusability, the residual activity reached as high as 81% after 8 cycles continuously. Meanwhile, the desorption of immobilized pectinase can be achieved by changing pH values of the medium. Obviously, the UiO-66-NH2@PMAA with attractive properties is highly promising for enzyme immobilization.
研究领域:
生物化学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of CO2 Utilization
·
2024
·
IF 7.2
Heming Deng,Haoshuang Gu
Two-dimensional membranes are considered the next generation separation membrane with great application potential due to their excellent separation performance, good mechanical strength and thermal stability compared with traditional membrane materials. In this work, the flexible NH 2 -UIO-66@MXene membrane was successfully prepared for gas separation by loading NH 2 -UIO-66 particles onto Ti 3 C 2 nanosheets based on an in-situ growth strategy. A LiF-HCl mixed solution was used as the etchant to obtain the Ti 3 C 2 nanosheets. The loading of NH 2 -UIO-66 particles can regulate the interlayer spacing of Ti 3 C 2 nanosheets, improving the specific surface area of Ti 3 C 2 and the adsorption capacity for specific gases. The -NH 2 group in NH 2 -UIO-66 enabled preferential adsorption of CO 2 over H 2 , and the CO 2 molecules adsorbed in the channel can even block the molecules passing through, increasing the resistance of CO 2 diffusion. As a result, the NH 2 -UIO-66@Ti 3 C 2 hybrid membrane realizes the selective separation of H 2 /CO 2 mixed gas, and the separation selectivity is as high as 155. The gas separation selectivity and permeation of the final prepared NH 2 -UIO-66@MXene were enhanced and exceeded the upper limit of Robeson upper bound (2017).
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
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
·
环境科学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2023
·
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
·
膜技术
·
化学工程
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
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
·
材料科学
·
化学工程
·
水处理技术
·
吸附科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）