APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jiaxin Yang,Deng Wang,Jihui Wang,Wenbin Hu
A novel self-healing composite coating was fabricated on magnesium alloy by using polycaprolactone (PCL) as resin matrix and iron-based metal-organic framework MIL-53 modified with tannic acid (TA) as function filler. The surface morphology, structure and wettability of composite coating were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) and sessile water droplet static contact angle. The corrosion resistance and healing performance of PCL coatings was determined by electrochemical impedance spectroscopy (EIS) and photothermal tests. Results indicate that MIL-53@TA/PCL coating possesses a flatter surface, a higher corrosion resistance and better photothermal effect than that of blank PCL coating and MIL-53/PCL coating. Under the near-infrared (NIR) laser irradiation with the wave length of 808 nm, the scratched MIL-53@TA/PCL coating could be healed within 10 min because of the excellent photothermal conversion ability of MIL-53@TA component.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2022
·Vol. 331
·期 2
·889-902
·
IF 1.754
Fu Xibiao,Liu Jun,Ren Zheng,Zhang Siqin,Xiao Fangzhu,Peng Guowen
Metal-organic frameworks (MOFs) MIL-101(Cr)-PMIDA with phosphate groups were prepared for the adsorption of U(VI). The morphology and structure of the samples were characterized by SEM, TEM, FT-IR, BET, XPS and XRD. This study investigated the effects of the initial U(VI) concentration, contact time, pH, adsorption temperature and coexisting ions on the adsorption of U(VI) by MIL-101(Cr)-PMIDA. The experimental results showed that the adsorption capacity of MIL-101(Cr)-PMIDA was 267.92 mg g −1 at C 0 (U) = 40 mg L −1 , pH = 6.0 and T = 298 K, which was much higher than that of MIL-101(Cr)-NH 2 (71.10 mg g −1 ). More importantly, the material exhibited excellent selective removal performance for U(VI) in an aqueous solution. Furthermore, adsorption thermodynamics and kinetic studies showed that the adsorption was spontaneous (∆G < 0) and exothermic (∆H ˃ 0), following the pseudo-second-order kinetic model (R 2 > 0.99). Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Ming Li,Jianhao Qiu,Jie Xu,Yuxiang Zhu,Jianfeng Yao
The oxygen vacancies could efficiently drive the photocatalytic oxidation of aromatic alcohol through the activation of reactants. However, the activation between aromatic alcohol and O2 (oxidant) over oxygen vacancies is rarely studied. Herein, the ZnIn2S4/MIL-121 heterostructure with abundant surface uncoordinated carboxyl was rationally designed for benzyl alcohol (BA) oxidation under visible light. Oxygen vacancies on catalysts were self-induced after the surface complexation between the uncoordinated carboxyl and BA molecules. Based on the reaction results, it is concluded that the oxygen vacancy activation to BA is more effective than that to O2 for BA oxidation over ZnIn2S4/MIL-121 hybrids. Specifically, when the activation fully occurs on BA (reaction in N2), an admirable conversion of 93.9% (corresponding production rate of benzaldehyde: 2348 μmol·g–1·h–1) is achieved, which is 3.4 times that of pure ZnIn2S4, whereas an inferior conversion of 45.9% is obtained in O2 due to the competition effect between O2 and BA for oxygen vacancies.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Lu Zheng,Yifan Gu,Baolv Hua,Jiarui Fu,Fengting Li
Metal-organic frameworks have been investigated in Fenton-like catalysis for tetracycline hydrochloride degradation, a widely used antibiotic which threatens the growth and health of creatures. However, powder phase and absence of large pores limit the materials’ degradation performance and application. In this work, a hierarchical macro-meso-microporous composite melamine sponge@MIL-101-Fe-NH 2 was firstly designed and constructed. While the micropores provided plenty of active sites to generate reactive oxygen species , the macropores and mesopores accelerated mass transfer. Besides, MIL-101-Fe-NH 2 particles dispersed on melamine sponge individually, exposing more catalytic sites and avoiding inactivation caused by aggregation compared to powder catalysts. Its catalysis performance for tetracycline hydrochloride degradation was evaluated through changing various influence factors like H 2 O 2 concentration, catalyst amount, pH and coexisting ions. Different from the preference of homogenous Fenton catalysts for pH 2–4, the composite displayed the most effective degradation at a subacid environment closer to nature with 77.24% in 30 min. Owing to the synergistic effect of hierarchical porous structure and monodispersed nanoparticles , the composite exhibited faster reaction rate and longer persistence compared to powder MIL-101-Fe-NH 2 . Easy recycling and less ion leaching made it advantages for practical application. •OH, •O 2 − and 1 O 2 active species contributed together to the degradation and two main possible degradation pathways were put forward based on 35 detected intermediates.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2021
·Vol. 22
·期 19
·10412
·
IF 5.924
Huiping Chen,Yongpan Shan,Lidong Cao,Pengyue Zhao,Chong Cao,Fengmin Li,Qiliang Huang
Long-term use of a single fungicide increases the resistance risk and causes adverse effects on natural ecosystems. Controlled release formulations of dual fungicides with different modes of action can afford a new dimension for addressing the current issues. Based on adjustable aperture and superhigh surface area, metal–organic frameworks (MOFs) are ideal candidates as pesticide release carriers. This study used Al3+as the metal node and 2-aminoterephthalic acid as the organic chain to prepare aluminum-based metal–organic framework material (NH2-Al-MIL-101) with “cauliflower-like” structure and high surface area of 2359.0 m2/g. Fungicides of azoxystrobin (AZOX) and diniconazole (Dini) were simultaneously encapsulated into NH2-Al-MIL-101 with the loading content of 6.71% and 29.72%, respectively. Dual fungicide delivery system of AZOX@Dini@NH2-Al-MIL-101 demonstrated sustained and pH responsive release profiles. When the maximum cumulative release rate of AZOX and Dini both reached about 90%, the release time was 46 and 136 h, respectively. Furthermore, EC50values as well as the percentage of inhibition revealed that AZOX@Dini@NH2-Al-MIL-101 had enhanced germicidal efficacy against rice sheath blight (Rhizoctonia solani), evidenced by the synergistic ratio of 1.83. The present study demonstrates a potential application prospect in sustainable plant protection through co-delivery fungicides with MOFs as a platform.Keywords:NH2-Al-MIL-101;controlled release;dual encapsulation;synergistic effect;rice sheath blight
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 46
·期 5
·2309-2319
·
IF 3.591
Yichen Jiang,Yifei Zhao,Lin Liang,Xiao Zhang,Jianmin Sun
Imidazolium-based ionic liquid 1,n-dialkyl-3,3′-bis-1-vinyl imidazolium dibromide (n = 2, 4 and 6) monomers were synthesized and further polymerized inside a MIL-101 framework to afford poly(ionic liquid)@MIL-101 composites (PIL-n@MIL-101, n = 2, 4 and 6). Furthermore, the ratio of poly(ionic liquid) to MIL-101 affected the structures of the composites. Different molar ratios of PIL-4/MIL-101 were prepared and characterized using elemental analysis, powder X-ray diffractometry, thermogravimetric measurements, N2 adsorption/desorption and CO2 adsorption measurements. Thanks to the high Brunauer–Emmett–Teller surface area and porous structure of MIL-101 together with the incorporated poly(ionic liquid), PIL-4@MIL-101-0.5 exhibited good CO2 uptake capacity (42.7 cm3 g−1 at 100 kPa, 273 K). Additionally, due to the synergistic effects of the unsaturated coordinated Lewis acidic Cr sites and nucleophilic Br− in the PIL-4@MIL-101 composites, the developed composites exhibited efficient catalytic performance in the CO2 and epichlorohydrin cycloaddition reaction, with 99.6% conversion obtained at 90 °C and 1.0 MPa for 2.5 h without an additional cocatalyst or solvent. The composites also showed easy separation and better recycling stability. Combining the advantages of facile synthesis, excellent performance for CO2 adsorption and conversion, good thermal stability and recycling stabilities, the poly(ionic liquid)@MIL-101 composites are appealing candidates for application in CO2 capture and utilization.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 18
·10540-10547
·
IF 3.361
Anxia Li,Xiaoxin Yang,Juan Chen
Metal–organic frameworks (MOFs), such as MIL-53(Fe), have considerable potential as drug carriers in cancer treatment due to their notable characteristics, including controllable particle sizes, high catalytic activity, biocompatibility and large porosity, and are widely used in a broad range of drugs. In this study, a new approach for the synthesis of MIL-53(Fe) nanocrystals with controlled sizes has been developed using a non-ionic surfactant PVP as the conditioning and stabilizing agent, respectively. During the nucleation of MIL-53(Fe), the PVP droplet, as a nano-reactor, controlled the growth of the crystal nucleus. The size and aspect ratio (length/width) of nanocrystals increased with an increase in PVP in the synthetic mixture. The MIL-53(Fe) nanocrystals showed a homogeneous morphology, with approximately 190 nm in length and 100 nm in width. MIL-53(Fe) not only was used to load the anticancer drug doxorubicin (DOX) but also generated hydroxyl radicals (˙OH) via a Fenton-like reaction for ROS-mediated/chemo-therapy of cancer cells. The approach was expected to synthesize numerous types of nano-size iron(III)-based MOFs, such as MIL-53, 89, 88A, 88B and 101. The MIL-53(Fe) nanocrystals hold great promise as a candidate to improve the controlled release of drugs and treatment effect for cancer therapy.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Yixuan Gao,Siming Yan,Yi He,Yi Fan,Liyun Zhang,Jing Ma,Ruitong Hou,Li Chen,Jingyu Chen
Herein, a novel membrane with polyacrylic acid (PAA), NH 2 -MIL-88B(Fe) (NM88B), and graphene oxide (GO) was fabricated via a simple vacuum filter method equipped with the nylon membrane substrate. The composite membrane (PAA@NM88B/GO membrane) retained the laminated structure of GO, and PAA@NM88B was used as the photo-Fenton catalytic nano-filler to intercalate GO. Through a series of material characterization and membrane separation performance tests, the results showed that by introducing porous NM88B and PAA cross-linking modification, PAA@NM88B/GO membrane had excellent hydrophilicity, water flux and dye rejection performance. The flux of the PAA@NM88B/GO membrane was 68.21 L m −2 h −1 bar −1 , which is about 15 times higher than that of GO membrane. In addition, the composite membrane had a high rejection (over 97%) for methylene blue (MB), crystal violet (CV) and Congo red (CR). More importantly, PAA@NM88B/GO membrane can also be used to degrade textile wastewater in real life. The membrane can be used as a catalyst to degrade contaminants, and had a high removal of MB in 40 min (98.79%) under the synergistic effect of membrane adsorption and photocatalysis . Therefore, the results indicated that this new type of PAA@NM88B/GO membrane had potential applications in water purification and actual textile wastewater treatment .
✓ 已验证
产品关联
DOI
高影响因子
INORGANICA CHIMICA ACTA
·
2021
·
IF 2.545
Ji-Min Yang,Yun-Kai Kou
Metal-organic framework-based composites can help overcome the functional shortcomings of single materials by virtue of the synergetic properties of their components. The new functionalities introduced in the resulting material allow for their use in a wide range of applications. Herein, we prepared a fluorescent amino-CQDs@MIL-101-SO 3 H composite sensor by immobilizing amino-functionalized carbon quantum dots (amino-CQDs) on sulfo-modified MIL-101 nanoparticles. MIL-101-SO 3 H was not only used as a carrier to encapsulate the amino-CQDs in the pore cavity by hydrogen bonding interactions between the free -SO 3 H groups of MIL-101-SO 3 H and the –NH 2 group of the amino-CQDs, but also as an adsorbent to selectively adsorb and capture the target analyte, i.e. 2,4-dinitrophenol (DNP), via hydrogen bonding interactions between the free -SO 3 H groups of MIL-101-SO 3 H and the –NO 2 group of DNP. The amino-CQDs were used as a probe to sense the target molecules with high selectivity. The amino-CQDs@MIL-101-SO 3 H composite sensor displayed excellent selectivity and sensitivity toward DNP, with a detection limit of 0.041 μM. This is the first study to demonstrate the immobilization of fluorescent amino-CQDs in mesostructured MIL-101-SO 3 H. The selective fluorescence detection demonstrated herein will provide a new platform for sensing hazardous pollutants.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Mengtian Jia,Yanyan Zhu,Dong Guo,Xiaogang Bi,Xiaohong Hou
Core-shell magnetic Fe 3 O 4 @MIL-101(Cr) nanoparticles were synthesized via layer-by-layer self-assembly method. Using Fe 3 O 4 @MIL-101(Cr) as support, Fe 3 O 4 @MIL-101(Cr)@MIP was prepared with phenytoin as template, acrylamide as functional monomer , ethylene glycol dimethacrylate as cross-linker, methanol and acetonitrile as porogen , azoisobutyronitrile as initiator. The materials were characterized by a serious of characterization experiments. The prepared Fe 3 O 4 @MIL-101(Cr)@MIP was demonstrated to possess good separability, large adsorption capability, excellent adsorption selectivity , good durability and reusability via adsorption experiments. Subsequently, a magnetic solid phase extraction method (MSPE) based on Fe 3 O 4 @MIL-101(Cr)@MIP combined with high performance liquid chromatography-ultraviolet detector (HPLC-UV) was established for the determination of phenytoin sodium in plasma samples. Experimental parameters including pH, the amount of adsorbent, extraction time, elution conditions, the concentration of NaCl were investigated to optimize extraction process. The method was validated. The linearity was observed in the range of 0.05–40 μg mL −1 with a lower limit of quantification of 0.05 μg mL −1 . The calibration equations were y = 0.2514x + 0.0319 ( r 2 = 0.9938), y = 0.2888x + 0.0472 ( r 2 = 0.9943), y = 0.2565x + 0.0418 ( r 2 = 0.9976), respectively. The recoveries ranged from 89.2 to 94.3%, intra- and inter-day precision (RSDs) ranged from 2.1 to 9.7% and 2.9–9.2%, respectively. The established MSPE-HPLC-UV method was time-saving, sensitive, accurate, environmental friendly, and drastically reduced the complex matrix interferences. The established method was successfully applied for phenytoin sodium determination in real plasma samples, providing new directions for therapeutic drug monitoring.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Xiaojuan Li,Fengzhen Liao,Lanmei Ye,Lizhi Yeh
In this study, based on the extensive discussion of the phase transformation process of metal-organic frameworks (MOFs)——MIL-88A(Fe) under thermal treatment, the catalytic performance of MIL-88A-derived iron/carbon (FexC) composites on persulfate (PS) activation for phenol degradation was investigated. FexC-600 ( γ -Fe 2 O 3 /C) exhibited a superior catalytic activity on PS activation for phenol degradation due to higher carbon content, more sp 2 -hybridized structure, carbonyl group and defective sites in composites, in which 98.23% of phenol (20 mg/L) was degraded after 60 min with 0.3 g/L catalyst and 0.3 g/L PS at ambient pH (6.1). The phenol degradation experiments and mechanism studies revealed that there was a catalytic synergism between iron oxides and carbon component in FexC 400-600 composites. Moreover, sulfate radicals (SO 4 − ), hydroxyl radical (•OH), singlet oxygen ( 1 O 2 ) and interfacial electron transfer process all involved in the degradation of phenol by FexC 400-600 composites, but the 1 O 2 -mediated non-radical oxidation was the dominant pathway rather than reactive radicals. Finally, the possible mechanism of PS activation on FexC 400-600 composites was proposed. This work discusses the synergistic catalytic mechanism of FexC composites on PS activation, and favors to provide a better understanding of the metal species and carbon component interaction in iron/carbon-based materials.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 26
·12041-12052
·
IF 3.553
Yi Xuerui,He Xiaobo,Yin Fengxiang,Yang Tong,Chen Biaohua,Li Guoru
The global NH 3 production is dominated by Haber–Bosch process, requiring high temperature and pressure. Electrochemical N 2 reduction reaction (NRR) under ambient conditions is a greener path for artificial N 2 fixation to NH 3 but calling for efficient catalyst to increase activity and selectivity. Herein, we report the iron-based metal–organic frameworks (MOFs), i.e., MIL-88B–Fe and amine-functionalized MIL-88B–Fe (NH 2 –MIL-88B–Fe) as efficient catalysts for electrochemical NRR under ambient temperature and pressure in neutral electrolyte. NH 2 –MIL-88B–Fe shows higher NH 3 yield rate of 1.205 × 10 –10 mol s −1 cm −2 than MIL-88B–Fe (3.575 × 10 –11 mol s −1 cm −2 ). Furthermore, NH 2 –MIL-88B–Fe exhibits the highest Faradaic efficiency of 12.45% at 0.05 V versus RHE. The control experiments prove that NH 3 is produced through electrocatalytic NRR. This work may trigger the interest of using MOFs as highly efficient catalysts for electrochemical NH 3 production.
✓ 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）