ANALYST
·
2019
·Vol. 144
·期 8
·2656-2661
·
IF 4.019
Pengcheng Xing,Di Wu,Jingshuai Chen,Jiming Song,Changjie Mao,Yuanhao Gao,Helin Niu
Recently, the pollution and damage caused by antibiotics in water have aroused serious concerns. In this situation, it is extremely important to develop a highly effective approach to detect antibiotics in water. In this contribution, we built a Cd-MOF material with stable fluorescence properties, using bbi = 1,4-bis(2-methyl-imidazol-1-yl)butane and H2L = 1,2-phenylenediacetic acid as organic ligands and Cd(NO3)2·4H2O as the metal node. The highly selective response of this MOF probe to ceftriaxone sodium (an antibiotic) can reach up to the ppb level in water, along with a fast response time, acid and alkali resistance, and anti-interference ability.
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PubMed
高影响因子
ELECTROANALYSIS
·
2019
·Vol. 31
·期 6
·1002-1008
·
IF 2.691
Baolong Ma,Hao Guo,Mingyue Wang,Li Li,Xueyan Jia,Huiqin Chen,Rui Xue,Wu Yang
A nanocomposite of HKUST-1 (MOF) and electroreduction graphene oxide (ERGO) is prepared and applied as an electrochemical sensor for the simultaneous determination of paracetamol and dopamine by means of one-step electrodeposition. The MOF/ERGO composite displays excellent electrochemical catalytic activities towards the paracetamol and dopamine, which is attributed to the synergistic effect of big surface area, porosity and high electrocataytic activity of the MOF and good conductivity of ERGO. The modified electrode could be applied to determine simultaneously paracetamol and dopamine in biochemical samples with wide linear ranges (0.2 μM to 160 μM for paracetamol and 0.2 μM to 300 μM for dopamine) and low detection limits (0.016 μM for paracetamol and 0.013 μM for dopamine). Meanwhile, the proposed sensor still displays high sensitivity, good selectivity and excellent stability.
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高影响因子
ChemNanoMat
·
2019
·Vol. 5
·期 4
·558-565
·
IF 3.431
Lili Liu,Lei Wang,Qingqing Li,Xuefeng Yu,Xiaofeng Shi,Jingjun Ding,Wenbin You,Liting Yang,Yahong Zhang,Renchao Che
Graphical A core-shell microsphere with cobalt nanoparticles as core and N-doped graphitized carbon as shell was grown on the laminated rGO surfaces, and the Co@NC@RGO composites exhibit significantly strong microwave absorption and tuning absorption frequency range. Nanocomposites of MOF-derived N-doped-carbon-wrapped cobalt anchored on reduced graphene oxide (Co@NC@RGO) have been successfully fabricated for use as microwave absorption materials. A unique core-shell nanostructure with cobalt nanoparticles as core and N-doped graphitized carbon as shell was grown on the surface of laminated reduced graphene oxide (RGO). An enhanced synergistic effect between magnetic and dielectric components can be readily achieved by changing the dispersion of Co@NC nanoparticles on RGO. The as-synthesized microspheres are composed of numerous nanoscale core-shell Co@NC units, which combined magnetic Co cores with intrinsically contributing magnetic loss and N-doped graphitized carbon providing a pathway for electron transfer as well as transition between magnetic Co cores and high electrical conductivity of RGO. The resulting Co@NC@RGO composites exhibit excellent reflection loss (RL) values and effective absorption bandwidths. The optimized Co@NC@RGO-3 minimum RL (RLmin) value could reach −46.5 dB at 9.4 GHz with a thickness of 3.5 mm. Tuning the thickness from 1.5–5 mm, the effectivity absorption frequency range could achieve up to 14.3 GHz (from 3.7 to 18 GHz). The excellent microwave absorption performance may be attributed to the magnetic loss, dielectric loss and interfacial polarization.
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高影响因子
ChemCatChem
·
2019
·Vol. 11
·期 14
·3327-3338
·
IF 4.495
Man Yuan,Hongbo Zhang,Chen Yang,Fanhao Wang,Zhengping Dong
Graphical It′s nanoreactor time : Co@ZDC@mC nanoreactor with a hierarchical mesoporous yolk-shell structure was successfully prepared by the high-temperature carbonization of a ZIF-67@polymer composite. The Co@ZDC@mC-700 exhibited superior catalytic efficiency in the catalytic reduction of nitrobenzene with N 2 H 4 ⋅H 2 O, and also showed good reusability and recyclability. Porous nanoreactors demonstrate immense potential for applications in heterogeneous catalysis due to their excellent mass-transfer performance and stability. The design of a simple, universal strategy for fabricating nanoreactor catalysts is of significance for organic transformation. In this study, a nanoreactor with a hierarchical mesoporous yolk-shell structure was successfully prepared by the high-temperature carbonization of a ZIF-67@polymer composite. The core of the resultant Co@ZDC@mC material comprised Co NPs anchored in the ZIF-67-derived carbon framework, while the shell comprised resin-polymer-derived mesoporous carbon. The as-obtained Co@ZDC@mC-700 catalyst enriched reactants, efficiently catalyzed the reaction in the core, and permitted the desorption of the product from the nanoreactor. In the catalytic reduction of nitrobenzene with N 2 H 4 ⋅H 2 O, Co@ZDC@mC-700 exhibited superior catalytic efficiency (TOF=1136.3 h −1 ). In addition, Co@ZDC@mC-700 exhibited excellent performance for the catalytic reduction of various functionalized nitroarenes, as well as good reusability and recyclability. Hence, a simple, useful approach for fabricating a metal-organic-framework-derived non-noble metal-based yolk-shell nanoreactor for effective catalytic transformation is proposed.
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高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 31
·15245-15252
·
IF 9.931
Jing Zhang,Jianhui Fang,Jinlong Han,Tingting Yan,Liyi Shi,Dengsong Zhang
Capacitive deionization (CDI) is a prospective technique for desalination of saline water on account of its lower cost, lower energy-consumption, and absence of secondary pollution. In this work, capacitive deionization of saline water using N, P, S co-doped hollow carbon polyhedra derived from MOF-based core–shell nanocomposites has been demonstrated. N, P, S co-doped hollow carbon polyhedra were rationally designed and originally synthesized from MOF-based core–shell nanocomposites by using poly(cyclotriphosphazene-co-4,4′-sulfonyldiphenol) coated zeolitic imidazolate framework-8 (denoted as ZIF-8@PZS-C). Choosing poly(cyclotriphosphazene-co-4,4′-sulfonyldiphenol) as an N, P, S co-doping source and carbon source, and ZIF-8 as a structural template which also acts as an additional N-doping source, ZIF-8@PZS-C was created with a superior hollow structure, high surface area, improved electrical conductivity and an excellent hydrophilic surface. Due to the multi-synergy of these characteristics, the ZIF-8@PZS-C electrodes have lower internal impedance, larger specific capacitance and great cycling stability. What's more, the ZIF-8@PZS-C electrodes display a high salt electrosorption performance of 22.19 mg g−1 at 1.2 V in a NaCl solution of 500 mg L−1. Furthermore, the as-prepared electrodes exhibit good stability and regeneration performance. Hence, the N, P, S co-doped hollow carbon polyhedra should be considered as a promising alternative electrode material for capacitive deionization. This work may open the door for the application of multiple heteroatom co-doped hollow carbon materials for the deionization of saline water.
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高影响因子
INORGANIC CHEMISTRY
·
2018
·
IF 4.7
He-Qi Zheng,Chun-Yan Liu,Xue-Yu Zeng,Jin Chen,Jian Lü,Rong-Guang Lin,Rong Cao,Zu-Jin Lin,Jin-Wei Su
Natural enzyme mimetics with high catalytic activity at nearly neutral pH values are highly desired for their applications in biological systems. Herein for the first time a stable MOF, namely MOF-808, has been shown to possess high intrinsic peroxidase-like catalytic activity under acidic, neutral, and alkaline conditions. As a novel peroxidase mimetic, MOF-808 can effectively catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine when H2O2 serves as oxidant, accompanied by a significant color variation in the solution. The catalytic activity and the color variation were greatly dependent on H2O2 concentration, and thus MOF-808 can be applied to the colorimetric sensing of H2O2. The H2O2 detection limit is 4.5 μM, and the linear range is 10 μM to 15 mM. In view of the significant inhibition effect produced by ascorbic acid, a facile and sensitive approach for colorimetric sensing of ascorbic acid was successfully established. The AA detection limit is 15 μM, and the linear range is 30–1030 μM. Further investigation found that the catalytic activity of MOF-808 could be mainly ascribed to the Zr–OH(OH2) groups. Such active Zr–OH(OH2) groups can be effectively shielded by gluconic acid, and subsequently the catalytic activity of MOF-808 was significantly suppressed. With these findings, a facile and selective colorimetric assay for glucose sensing has been successfully explored via combination of the glucose oxidation with the TMB oxidation. The glucose detection limit is 5.7 μM, and the linear range is 5.7–1700 μM. MOF-808 is one of the best colorimetric biosensors among the peroxidase mimics reported for H2O2, AA, and glucose detection.
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PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2018
·
IF 2.179
Shi-Yuan Zhang,Yuan-Yuan Yang,Yue-Qing Zheng,Hong-Lin Zhu
Electrocatalytic reduction of CO 2 to useful fuels or chemicals is a promising path for carbon recycling. In this study, a novel mixed-metallic MOF [Ag 4 Co 2 (pyz)PDC 4 ][Ag 2 Co(pyz) 2 PDC 2 ] was synthesized, and it transformed into Ag doped Co 3 O 4 catalyst, which exhibits excellent electro-catalytic performance for reduction of CO 2 in water to syngas (H 2 + CO). The as-prepared Ag/Co 3 O 4 material exhibits a high selectivity of CO in 0.1 M KHCO 3 aqueous solution (CO 2 saturated) with the corresponding faradaic efficiency up to 55.6%. Compared with the Ag/Co 3 O 4 electrode, the maximum faradaic efficiency (FE) of CO of pure Co 3 O 4 is 21.3% at − 1.8 V vs. SCE. The results show that the presence of Ag can improve the efficiency of CO significantly, thereby inhibiting the production of H 2 . The stability of the samples can be maintained for more than 10 h at − 1.8 V vs. SCE. The ratio of production between H 2 and CO can be controlled by varying the potential values.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 31
·31705-31717
·
IF 2.8
Zheng Xiang,Wang Jinlin,Xue Xiaolong,Liu Wanxia,Kong Yadong,Cheng Rong,Yuan Donghai
In this research, the adsorptive removal of diclofenac sodium, one of the representative pharmaceuticals and personal care products, from aqueous solution using Fe 3 O 4 @MOF-100(Fe) magnetic microspheres was studied for the first time. The Fe 3 O 4 @MOF-100(Fe) microspheres exhibit strong magnetism and stability, which were observed as a core-shell structure. The maximum adsorption capacity of Fe 3 O 4 @MOF-100(Fe) for diclofenac sodium can reach 377.36 mg L −1 , which was higher than most of the adsorbents reported. The adsorption kinetics follows the pseudo-second-order kinetic equation. And the adsorption equilibrium of DCF can be described with Langmuir isotherm. In the cycle experiment, Fe 3 O 4 @MOF-100(Fe) material performed high adsorption efficiency for low-concentration diclofenac sodium solution, and the removal rate can still reach 80% after 5 cycles of adsorption without desorption. The mechanisms including electrostatic interaction, H-bond interaction, and π-π interaction that coexisted in the adsorption processes would be of benefit to enhance the adsorption capacity. The Fe 3 O 4 @MOF-100(Fe) magnetic microspheres offer exciting opportunities for further application.
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PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Yongwei Chen,Houxiao Wu,Zewei Liu,Xuejiao Sun,Qibin Xia,Zhong Li
Mechanochemical synthesis, driven the chemical transformation by mechanical force, has been a rapid and efficient strategy to prepare metal–organic frameworks (MOFs). In this work, a liquid-assisted mechanochemical method has been successfully applied to the synthesis of copper based MOF-505. The crystallinity and porosity of MOF-505 were investigated by adjusting the synthesis parameters, such as added solvent (type and amount) and grinding time. Results showed that the type and amount of added solvent were crucial parameters for the mechanochemical synthesis of MOF-505. Furthermore, the optimizations of MOF-505 synthesis were carried out: grinding Cu(OAc)2·H2O and H4bptc as starting materials for 80 min with 0.4 mL of DMF assisted, giving MOF-505-K with Brunauer–Emmett–Teller (BET) surface area of 977 m2/g. Meanwhile, MOF-505-K had moderate CO2 adsorption capacity of 2.01 mmol/g at 298 K and 100 kPa. The adsorptive selectivity determined from ideal adsorbed solution theory (IAST) indicated that MOF-505-K had high CO2/N2 and CO2/CH4 selectivities (26.6 and 5.5) at 298 K. Highly efficient mechanochemical synthesis of MOF-505 provides the promise to facilitate the industrial application of CO2 capture.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Yanying Wang,Zhaoyi Zhang,Xin Liu,Fang Ding,Ping Zou,Xianxiang Wang,Qingbiao Zhao,Hanbing Rao
We developed a hydrothermal synthesis and high temperature calcination method to synthesize the metal–organic framework (MOF)-derived NiCo2O4/NiO and NiCo2O4/NiO-rGO. These composites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Brunner–Emmet–Teller measurements. This work combines excellent catalytic efficiency of the transition metal with large specific surface area and large number of pores of the MOF. Consequently, catalysts for oxygen evolution with high efficiency and low cost were obtained. Both materials show lower overpotential at 430 and 350 mV, respectively, under 10 mA·cm–2. The Tafel slopes are 49 and 66 mV·dec–1, respectively, with very small performance attenuation for long-term catalytic reaction. Therefore, the catalysts reported herein possess great potential for application in oxygen evolution reaction.
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高影响因子
Biomaterials Science
·
2019
·Vol. 7
·期 9
·3683-3692
·
IF 5.251
Zongjun Liu,Tuo Li,Fang Han,You Wang,Yang Gan,Junhui Shi,Tianran Wang,Muhammad Luqman Akhtar,Yu Li
Synergistic cancer starvation/ROS-mediated/chemo-therapy is developed through a cascade reaction with enzyme glucose oxidase (GOX) modified on the surface of an Fe-based metal organic framework (MOF(Fe)) and drug camptothecin (CPT) loaded into the cavities of MOF(Fe). Once internalized by tumor cells, GOX catalyzes endogenous glucose into hydrogen peroxide (H2O2) and gluconic acid (H+) enabling starvation therapy through choking off energy (glucose) supply. Meanwhile, the acidic micro-environment of tumor enhanced by the generated H+ degrades the MOF(Fe) simultaneously releasing CPT for chemotherapy and Fe3+, catalyzing H2O2 into one of the strongest reactive oxygen species (ROS) ˙OH enabling ROS-mediated therapy. Both in vitro and in vivo results show remarkable tri-modal synergistic anticancer effects. This work may shed some light on the development of novel multi-modal cancer therapies without any external intervention.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Chen Wang,Guo Lin,Jiling Zhao,Shixing Wang,Libo Zhang,Yunhao Xi,Xiteng Li,Ying Ying
A novel adsorbent (UiO-66-TA) was presented by modifying metal-organic framework composites with thioctic acid. UiO-66-TA were characterized by fourier transform infrared (FT-IR), field emission scanning electron microscopy (FESEM), thermogravimetric (TG), Brunner-Emment-Teller (BET) measurement and X-ray photoelectron spectroscopy (XPS), which indicating that it had excellent morphology and specific surface area. The adsorption performances of UiO-66-TA for Au(III) were studied. The results showed that UiO-66-TA had a strong adsorption capacity under acidic conditions and the optimal pH was 2.0. Isotherm and kinetic adsorption were also conducted and found that the experimental values correspond to Langmuir model and pseudo-second-order isotherm model, indicating that the mechanism is mainly chemical adsorption on a uniform surface. Wastewater experiment showed that UiO-66-TA can be used for highly selective recovery Au(III) in actual life. The regeneration and thermodynamic experiments indicated that UiO-66-TA can be reused and were a spontaneous endothermic process. XPS analysis and the zeta potential proved that the main adsorption mechanisms were ion exchange and chelation. DFT calculation found that there are two ways to combine Au with S on UiO-66-TA and their distances are 2.38 Å and 2.39 Å, indicating that the gold and sulfur play a major role in chelation. In summary, UiO-66-TA was a hopeful adsorbent and could be used to collect gold ions from wastewater in a sustainability perspective.
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高影响因子
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