Applied Materials Today
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2021
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IF 10.041
Minghao Ni,Ming Gong,Xiang Li,Jinlou Gu,Bo Li,Ye Chen
Metal-organic frameworks (MOFs) have attracted significant attention thanks to their excellent physical and chemical properties. Metal-organic frames are widely used in optics. For example, metal-organic frameworks can be used in fluorescent probes to detect and treat diseases, and can also be used to make solid-state light-emitting devices. Considering the high stability and easy synthesis of Zr-based UiO-66 MOF as well as the strong fluorescent emission of porphyrin molecules, the TCPP-incorporated UiO frameworks would inherit these advantages and exhibit intriguing optical performance. Therefore, in this paper, TCPP was doped into UiO-66, and the optical properties of the resulting MOF structure were observed. To obtain the optimal doping condition, three doping concentrations of TCPP were used. Besides the structural and morphological characterization by X-ray diffraction and scanning electron microscopy, more attentions have paid on the optical testing based on absorption and fluorescence spectroscopy, two-photon fluorescence spectroscopy and time-resolved spectroscopy. As a result, the TCPP-doped MOFs exhibited good fluorescence properties and satisfied our previous expectations of nonlinear optical properties and two-photon absorption. This work would pave a new way in constructing various MOFs-based solid-state devices with widespread optical applications.
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高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2020
·Vol. 45
·期 5
·7120-7128
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IF 3.741
Menglu He,Jia Jia,Qing Sun,Weixin Zhang
SUMMARY Li-O 2 battery has attracted much attention due to its ultra-high theoretical energy density in the field of electrochemical energy storage. The introduction of efficient electrocatalyst can effectively accelerate the reaction rate of ORR and OER, so as to improve the coulomb efficiency and poor cycle stability of Li-O 2 battery. In this work, a novel hollow N-doped carbon sphere is prepared by using MOF and polystyrene as template, and act as highly efficient oxygen electrocatalyst for rechargeable Li-O 2 batteries. The hollow structure can provide enough oxygen diffusion channel, deposition and decomposition space for reduction products. N doping into the hollow carbon structure can increase the charge density of adjacent carbon atoms and enhance its catalytic activity of ORR/OER. As a result, the Li-O 2 battery using the hollow N-doped carbon sphere as air cathode exhibited an high specific capacity of 18 762 mAh/g (at a current density of 500 mA/g) and remarkable cycling stability of 212 cycles (at a current density of 500 mA/g and limited capacity of 1000 mAh/g), outperforming the carbon material with common structure. This work highlights the importance of air cathode structure and efficient catalyst, provides a new idea for the design of air cathode of Li-O 2 battery, and expands the scope of future research.
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APPLIED SURFACE SCIENCE
·
2020
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IF 6.182
Huanhuan Li,Mingyang Tan,Can Huang,Weiping Luo,Shuang-Feng Yin,Weijun Yang
Functional nanosheets have attracted great attention due to their potential applications in catalysis chemistry and material science. Herein, Co 3 O 4 nanoparticles interconnecting with nitrogen-doped carbon architectures (denoted as Co 3 O 4 /NC) was developed on nickel foam surface by a two-step solvothermal process and followed by calcination. A metal organic framework (MOF) of laminar CoMOF-NH 2 was synthesized firstly by in-situ transformation of Co 2 (OH) 3 Cl array. Then, porous Co 3 O 4 /NC nanosheets were obtained by controlled heat treatment of CoMOF-NH 2 . The Co 3 O 4 /NC supported by nickel foam can be directly used as self-supported electrodes for electrocatalysis without any binders. As-synthesized Co 3 O 4 /NC acts as effective catalysis for oxygen evolution reaction (OER). Interestingly, the optimized electrochemical efficiency for OER was achieved by Co 3 O 4 /NC nanosheet with overpotentials of 235 mV and 264 mV offering current densities of 10 mA/cm 2 and 100 mA/cm 2 , respectively. It also has a relatively low Tafel slope, which indicates the fast electron transfer kinetics of the catalyst. So Co 3 O 4 /NC nanosheet has great potential in replacing precious metal electrocatalysts in OER application.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
De-Yu Gao,Zan Liu,Zhi-Lin Cheng
The crucial challenge of 2D inorganic nanomaterials-filled composite hydrogel with outstanding mechanical properties was concentrated on the surface modification that was capable to access a better interface between 2D inorganic nanomaterials and hydrogel in past. In this paper, for the first time, we extensively studied the application of as-synthesized 2D Ni-Fe MOF nanosheets with natural organic interface and interlayer structure in PVA hydrogel. The morphology and structure of the as-prepared 2D Ni-Fe MOF/PVA composite hydrogels were determined by a series of characterizations. The results indicated that the as-prepared 2D Ni-Fe MOF/PVA composite hydrogel with porous structure exhibited a desirable dispersion due to the existence of the potential interfacial interaction. Furthermore, the swelling, mechanical and tribological properties of the composite hydrogel were intensively investigated. Dramatically, the tensile strength and compression modulus of the as-prepared 2D Ni-Fe MOF/PVA with 0.1 wt.% filling content were increased by 62.5 % and 113 % relative to pure PVA hydrogel, respectively. Owing to the presence of the interlayer structure of 2D Ni-Fe MOF nanosheets, the friction coefficient of the 2D Ni-Fe/PVA composite hydrogel with 0.15 wt.% filling content was reduced by 41 % compared to pure PVA hydrogel.
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Journal of Materials Chemistry B
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2020
·Vol. 8
·期 39
·9129-9138
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IF 5.344
Xiang Xu,Yiwei Chen,Yongxin Zhang,Yansheng Yao,Peng Ji
Intracellular amplification of oxidative stress has been proved to be an effective strategy to induce cancer cell death and the Fenton reaction was regarded as a robust way to generate ROS which are the main cause of amplified oxidative stress. However, current Fenton reaction-inducing agents lacked stability in the bio-environment and failed to exert their ideal catalytic performance. We, hereby, designed an Fe2+-based metal–organic framework (MOF) to deliver Fe2+ to cancer cells to trigger the Fenton reaction and produce excessive ROS. The obtained nano-scale MOF that was constructed by ferrous acetate and organic ligands (BDC-NH2) endowed itself with excellent stability in bio-media and pH responsively degraded itself to release Fe2+ in the acid tumor microenvironment. Such a characteristic demonstrated robust capacity to catalyze the Fenton reaction and produce considerable ROS and thus induced distinct Fe2+-mediated cell ferroptosis. Meanwhile, directly exploiting an Fe2+-based MOF to inhibit and kill cancer cells circumvented the potential adverse effects of loading drugs (like the cardiotoxicity of doxorubicin, and the nephrotoxicity and ototoxicity of cisplatin) and proved to be biocompatible in in vivo experiments. More importantly, observations of the in vivo antitumor experiment attested its impressive inhibition on cancer cells and amelioration on the physical health of treated mice. Our study thus presented a novel and biocompatible ferroptosis strategy to be applied in effective clinical cancer therapy.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Hailong Tian,Mengzhu Zhang,Guoxia Jin,Yue Jiang,Yuxia Luan
Chemodynamic therapy (CDT) utilizes Fenton catalysts to convert intracellular hydrogen peroxide (H 2 O 2 ) into cytotoxic hydroxyl radical (OH∙) for tumor therapy, but endogenous H 2 O 2 is usually insufficient to achieve satisfactory tumor therapy effect. Engineering an efficient CDT nanoplatform for satisfactory cancer therapy remains a challenge. Herein, we rationally designed a Cu-based metal-organic framework-199 (MOF-199) nanoplatform integrating vitamin k3 (Vk3) for amplified CDT-mediated cancer therapy, which could accumulate efficiently in tumor tissues through enhanced permeability and retention (EPR) effect. The MOF-199 nanoparticles (MOF-199 NPs) were dissociated by glutathione (GSH) into MOF-199 fragments, which triggered Fenton-like reaction for CDT. On the one hand, Vk3 was catalyzed by NAD(P)H quinone oxidoreductase-1 (NQO1) to produce sufficient H 2 O 2 to activate Fenton-like reaction. On the other hand, GSH was largely consumed in the tumor microenvironment. Thus, this nanoplatform enabled sufficient cytotoxic reactive oxygen species (ROS) for amplified CDT effect, demonstrating effective tumor growth inhibition with minimal side-effect in vivo. Our work provides an innovative strategy to modulate GSH and H 2 O 2 levels for amplified CDT.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Chengcheng Pan,Zhicheng Liu,Minghua Huang
Recently, metal–organic framework (MOF) manifests an outstanding oxygen evolution reaction (OER) catalytic activity due to its structural diversity, highly ordered pore structure and abundant active sites. Herein, through a facile one-step solvothermal method, iron-doped nickel MOF nanosheets in situ grown on conductive nickel foam (Fe-Ni MOF NSs/NF) were conveniently fabricated as efficient OER catalyst, using only one kind of metal salt precursor. The ultrathin 2-dimensional sheet structure possesses highly exposed surface area and numerous metal sites which are beneficial to electrocatalytic OER performance. The Fe-Ni MOF NSs/NF presents superior OER activity in 1 M KOH, requiring overpotentials of 258 and 270 mV to deliver the current density of 50 and 100 mA cm −2 , along with a low Tafel slope of 40.8 mV dec −1 . Moreover, the durability of the Fe-Ni MOF NSs/NF catalyst is also outstanding, exhibiting only minor chronoamperometric decay after 24 h continuous operation at 50 mA cm −2 . The excellent OER activity could be ascribed to the coupling effects of ultrathin-nanosheet structure, favorable charge transfer kinetics, high conductivity and excellent intrinsic catalytic activity. This facile and economical strategy might be advantageous to prepare other high-performance MOF-based OER catalysts.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2020
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IF 5.774
Wenbo Chen,Zhenguo Zhang,Lei Hou,Cancan Yang,Hongcheng Shen,Kai Yang,Zhe Wang
This work mainly studies the CO 2 separation performance of a new type mixed-matrix membranes (MMMs) based on MOF-801 as the microporous filler and PIM-1 as the polymer matrix. MMMs was successfully formed via simple casting/solvent evaporation approach at room temperature. The samples were systematically characterized by SEM, XRD, TGA and FTIR, the permeability-selectivity of MMMs to CO 2 , O 2 and N 2 was studied by gas permeability test. The experimental results show that the uniform dispersion of the CO 2 -philic MOF-801 filler provides a channel for the rapid and selective transport of CO 2 , so the MOF-801/PIM-1 MMMs revealed much higher CO 2 permeability and CO 2 /N 2 ideal selectivity (CO 2 = 9686 Barrer, CO 2 /N 2 = 27, all selectivity in the paper is ideal) than pure polymer membrane. After 90-days aging test, the CO 2 permeability of MMMs remains above 70%, which reflects its good anti-aging performance. After 120 h continuous gas permeability test, it also shows good long-term working stability. The experimental results show that the good gas separation performance of MMMs exceeds the Robeson upper bound (2008), showing good application prospect for practical greenhouse gas CO 2 separation.
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CHEMICAL ENGINEERING SCIENCE
·
2020
·
IF 3.871
Fan Yang,Hussain Sadam,Yanqiu Zhang,Jianzhong Xia,Xiaobin Yang,Jun Long,Songwei Li,Lu Shao
Nanofiltration membanes play a critical role in alleviating global water scarcity, affecting more than 4 billion people. Herein, a new metal organic framework (MOF) sacrificicial strategy is designed to synthesize flux-enhancing nanofiltration membrane for efficient dye removal. With the aid of polyphenol chemistry, ZIF-67 MOF was first coated onto a porous support and in situ transformed into a selective layer by virtue of pyrrole polymerization. Trigerred by ammonium persulfate, polypyrrole selective layer functioalized nanofiltration membrane was fabricated when accompanying pore regulation by MOF self-sacrifice. The membrane demonstrated a flux enhancement of 745% than pristine polypyrrole (PPy) one with maintained rejection. Furthermore, the synergistic interactions among polypyrrole, polyphenol, and porous support endowed membrane with excellent stability during long term test. The designed MOF sacrificed route may open a new avenue for fabricating advanced energetic-efficient membranes with the reconstructed architecture towards diverse separation applications.
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高影响因子
ELECTROCHIMICA ACTA
·
2020
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IF 6.215
Fan Zhou,Zhensong Qiao,Yinggan Zhang,Wanjie Xu,Hongfei Zheng,Qingshui Xie,Qing Luo,Laisen Wang,Baihua Qu,Dong-Liang Peng
Carbon materials , especially those with hollow structure, have gained considerable attention as the host materials for sulfur in Li–S batteries . Herein, the nanocages consisting of carbon nanotubes (CNTs) and hierarchically porous carbon (CNT-NC@GC) are synthesized using bimetallic core-shell metal-organic frameworks as precursor. CNTs are in situ introduced onto the inner/outer surface of the nanocages to form a three-dimensional conductive network throughout the entire electrode for the favorable electrolyte penetration and improved electrons/ions transfer. Abundant N-doping and Co nanoparticles decoration in the tips of CNTs or on the surface of GC shells are beneficial to immobilize soluble polysulfides . Moreover, the modified Co nanoparticles possess chemisorption and electrocatalytic activity for sulfur conversion, which can promote redox kinetics of the polysulfides and improve the cycling stability. As a result, the as-prepared CNTs-grafted nitrogen-doped carbon@graphitic carbon nanocages cathode containing 79.2 wt% of sulfur (CNT-NC@GC/S) delivers a high discharge capacity of 743 mA h g −1 after 500 cycles at a current density of 1.0C with a capacity retention of 83.6%. And the cathode with high areal sulfur loading of 4.95 mg cm −2 shows a high areal capacity of 4.01 mA h cm −2 over 100 cycles.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Ihtisham Ul Haq,Shen Hui Li,Hong-Gang Zhen,Rehan Khan,Ao-Shuai Zhang,Zhi-Ping Zhao
For separating 1, 3-butadiene (BD) from BD/N 2 mixture, among numerous studied metal–organic frameworks-based adsorbents, Ni-ZIF-8 was comparatively selected here based on intelligent gravimetric analysis, simulation studies, facile synthesis, and very good IAST selectivity. Experimental results showed good butadiene uptake capacity of Ni-ZIF-8 of 7.41 mol/kg, which is 42% higher than pure ZIF-8. Additionally, Ni-ZIF-8 exhibits IAST selectivities of 2826 and 3302 at 0.1 bar, at 25 and 45 °C respectively, for 20% BD/N 2 adsorption. The molecular simulation results showed that Ni-ZIF-8 has binding energies of 65.25, 9.54 kJ/mol, while ZIF-8 has 56.07, 15.03 kJ/mol for butadiene, and nitrogen, respectively. This strongly supported the experimental results. To the best of our knowledge, Ni-ZIF-8 showed the best working capacity of 5.91 mol/kg for butadiene among all the reported adsorbents. Moreover, dynamic adsorption experiments revealed that butadiene could be recovered from BD/N 2 mixtures at room temperature, suggesting great potential for industrial BD/N 2 separation.
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Journal of CO2 Utilization
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2020
·
IF 5.993
Guangyong Shi,Wei Xu,Jichao Wang,Ye Yuan,Somboon Chaemchuen,Francis Verpoort
The coordination of pyridylcarboxylate (isonicotinic acid, IN) with copper (II) fabricates a Cu(IN)-MOF. The characteristic properties of the Cu(IN)-MOF are obtained via different analysis techniques such as XRD, SEM, BET, ICP, TG, etc. The advantage of copper(II) coordinated with a bi-functional organic linker (IN), containing a pyridyl and carboxylate group, is demonstrated by the chemical properties of which the Cu(II)-based MOF exhibits excellent catalytic performance for the CO 2 carboxylation of terminal alkynes. No noble-metal, co-catalyst, or additives are required to execute the reaction. The effectiveness of the Cu(IN)-MOF was demonstrated with a variety of substrates (>11). Moreover, the Cu(IN)-MOF, as a heterogeneous catalyst, can be recycled at least 5 times retaining its excellent catalytic performance. Herein, we report the first copper (II) metal-organic framework (Cu(IN)-MOF) applied for the carboxylation of alkynes with CO 2 demonstrating several advantages such as stable catalyst, avoiding the use of an expensive noble-metal, straightforward synthesis.
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