Chemosensors
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2022
·Vol. 10
·期 11
·443
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IF 4.229
Luyi Zhu,Qinan Zhou,Wenqing Shao,Zhenbo Wei,Jun Wang
A novel Co-based organic frameworks/carbon nanotubes/silicon dioxide (Co-MOF/CNTs/SiO2)-modified Au electrode was fabricated and taken as a platform for gallic acid (GA) detection. The composite combined the advantages of Co-MOF, CNTs and SiO2, and higher electrochemical response of Co-MOF/CNTs/SiO2-modified electrode indicated that the composite material exhibited satisfied the catalytic activity towards GA. Moreover, the electrochemical oxidation process of GA was deeply investigated on the surface of electrode based on computational investigations. Hirshfeld charges and condensed Fukui functions of each atom in GA were calculated. Besides, the catalysis of Co-MOF to GA was further investigated based on density functional theory. The quantitative determination of GA was carried out and showed a linear range between 0.05–200 μM, with low limit of detection. The sensitivity value of the self-assembled electrochemical sensor was calculated to be 593.33 μA cm−2mM−1, and the selectivity, reproducibility and stability of the gallic acid sensor were also confirmed in the study.Keywords:gallic acid;electrochemical;electro-oxidation;detection;density functional theory
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xuan Cai,Liang Gao,Jizhuang Wang,Dan Li
Incorporating passive radiative cooling into textiles is an effective way to improve individual personalized thermophysiological comfort for the human body. Based on radiative cooling textile design, rational functionalization further facilitates practical applications, especially for medical protective products with customized requirements. Herein, we present a hierarchical polyurethane/metal–organic framework (MOF) composite nanofiber membrane with an integrated radiative cooling effect and photocatalytic antibacterial property. Fabricated by a scalable electrospinning method, the hierarchical nanofiber membrane shows high solar reflectance of 97% and improved thermal emissivity of 93% attributed to the abundant chemical bonds in ZIF-8 nanoparticles, rendering a temperature drop of ∼7.2 °C under direct sunlight and ∼5.5 °C at night. In addition, the photocatalytic activity of ZIF-8 ensures a 96% bacterial mortality rate for preventing bacterial infection. In practical application, our composite fabric can prevent superheating by 4.4 °C compared with the traditional protective suit under direct sunlight. Along with its anti-infection ability, the composite fabric is desirable for medical protective textiles. The innovative integration of passive radiative cooling design and functional MOFs breaks through the traditional cooling mode and provides huge substantial advantages for smart textiles and personal cooling applications.
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ACS Nano
·
2023
·
IF 17.1
Yite Li,Liqian Liu,Tian Meng,Lei Wang,Zhigang Xie
Sunlight-driven photocatalytic filters against pathogenic bioaerosols have attracted a lot of interest. However, developing an efficient interception system that shows enhanced visible-light harvesting, controllable charge dynamic, and boosted ROS generation remains a grand challenge. Here, we designed an ionic ZIF-8@iCOF nanocomposite as a sunlight-driven photocatalytic filter through elaborate structural engineering of the heterointerface between ZIF-8 and cationic iCOF layers. The photoactive experiments reveal significant improvements in the visible light absorption and sunlight-driven exciton-enhanced intersystem crossing to boost the generation of singlet oxygen (220%) and also obtain antibacterial efficiency of 99.99999% after 15 min irradiation. After combining with commercial polymer, resultant ZIF-8@iCOF/polyacrylonitrile (PAN) fibrous membranes exhibited high interception efficiency for both PM10 and PM2.5 (98%), being close to the commercial N95. This fibrous membrane also possesses good biocompatibility and strong elimination of bacteria under sunlight conditions, satisfying for the long-lasting contact usage. This finding not only showcases the promise of the porous materials-based fibrous membranes for efficient photocatalytic filter against pathogenic bioaerosols but also highlights the importance of accurate structural engineering for the advancement of sunlight-driven photocatalytic systems in environment and energy-related fields.
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CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Jierui Wang,Jialin Yang,He Zhu,Bo-Geng Li,Shiping Zhu
The construction of MOF monoliths can solve the drawbacks of MOF powders in practical applications that can cause high pressure drop, low mass transfer efficiency, clogging, and complicated operation and recycling treatment, but there are still problems such as MOF pore clogging, difficulty in tuning the pore structure of the monoliths, and poor mechanical properties. Herein, nearly pure ZIF-8 monoliths with hierarchical pore structure were prepared by in-situ converting the amorphous ZIF-8/ZnO nanoparticles stabilized HIPE templates into continuous ZIF-8 skeleton. The obtained ZIF-8 monoliths exhibit low bulk densities of ∼ 80 mg cm −3 , high BET surface areas of up to 961.3 m 2 /g, and good mechanical properties. The monolith maintained high catalytic activity for 30 h in the Knoevenagel reaction using a homemade continuous flow reactor, revealing its high efficiency and good stability. This work provides a worth-adopted approach to prepare MOF-based monoliths for applications such as adsorption, separation, catalysis and effluent treatment.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Hongai Zheng,Meilin Zhu,Derui Wang,Yao Zhou,Xin Sun,Shuangyan Jiang,Mengyao Li,Cunzheng Xiao,Daquan Zhang,Lizhi Zhang
Membrane fouling is one of the main impediments that limit the wide application of Polyvinylidene fluoride (PVDF) membrane. In this study, for the first time, we incorporated the cellulose nanocrystal (CNCs) onto Cu-MOF-74 by physical stirring and then coated the composites on the PVDF membrane to ameliorate the antifouling performance. The PVDF membrane with the addition of CNC/Cu-MOF-74 composite showed enhanced hydrophilicity compared with the pristine membrane, which significantly promoted the permeability and antifouling performance. The Bovine serum albumin (BSA) multiple-cycle antifouling results revealed that the flux recovery ratio (FRR) value (76.9 %) was much higher than that of the pristine membrane (60.8 %). The enhancement of recovery flux was correlated with the increased electrostatic repulsion and hydrophilicity of the modified membrane according to the contact angle test and Zeta-potential measurement. Meanwhile, the CNC/Cu-MOF-74 modified membrane showed improved antibacterial efficiency (96.3 % at 4 h) due to the predominant antibacterial efficacy of Cu-MOF-74. The efficiently antibacterial achievement of modified membrane was attributed to the release of Cu 2+ and the generation of •OH. This study proposed a novel modified membrane with excellent antifouling properties and provided new insights into the fabrication of antifouling membranes with outstanding performance.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Shi Chen,Wenjing Liang,Xinyi Wang,Yueqi Zhao,Shuo Wang,Zheng Li,Shengmei Wang,Li Hou,Yang Jiang,Faming Gao
Transition metal sulfides (TMSs) are widely used in energy storage and energy conversion systems because of their excellent electrochemical properties . However, their application is restricted by a low electron transfer efficiency, few active sites and poor stability. In this paper, CoNi bimetallic sulfides supported by carbon skeleton (CoNi-SP/NPC) were prepared using bimetallic organic frameworks (MOFs) as templates and modified with phosphorus doping. Compared with single metal sulfides, the bimetallic sulfides are more favorable for electron transfer in the catalytic process. Meanwhile, the carbon skeleton support gives the catalyst higher mechanical stability, and the P-doping brings more active sites into to contact with the aqueous solution. The overpotential of CoNi-SP/NPC catalyst is only 105 mV at 10 mA cm −2 for hydrogen evolution reaction (HER) and 313 mV at 100 mA cm −2 for oxygen evolution reaction (OER). In addition, CoNi-SP/NPC also displays remarkable performance in the course of overall water splitting, which can achieve 50 mA cm −2 at only 1.8 V and remains good stability for 12 h. This work proposes a feasible strategy to synthesize highly efficient water splitting electrocatalysts .
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FOOD CHEMISTRY
·
2022
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IF 9.231
Zhuo Sun,Juan Lu,Xin Zhang,Xiangyu Shan,Qian Wu,Chao Li,Huiling Li,Shuning Yang,Li Tian
In this work, Zn-MOF electrospun nanofibres (Zn-MOF NFs), CdTe and Au@Pt-rGo were applied to Ru(bpy) 3 2+ /tri- n -propylamine electrochemiluminescence (ECL) system. And a novel ECL sensor for the determination of fenpropathrin was constructed for the first time. Due to the large surface area and pores, Zn-MOF NFs can both carry CdTe and Au@Pt-rGo and promote luminescence by facilitating electron transfer and reducing electron transport paths. CdTe participated in the luminescence reaction and improved the system’s sensitivity together with Ru(bpy) 3 2+ . Au@Pt-rGo can promote electron transport in the system. Under the synergistic effect of the three, the ECL sensor had achieved satisfactory results in weak alkaline solution. The constructed ECL sensor can detect fenpropathrin in the range of 4 × 10 −11 –4 × 10 −6 M, and the detection limit was 1.33 × 10 −11 M (S/N = 3). It can be used to detect fenpropathrin in juice samples, which provided a new idea for determining fenpropathrin.
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COMPOSITES PART B-ENGINEERING
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2022
·
IF 11.322
Shuai Liu,Xiwen Fan,Fang Yuan,Min Sang,Jianyu Zhou,Junshuo Zhang,Shouhu Xuan,Sheng Wang,Xinglong Gong
This work reported a biomimetic shear thickening fluid (STF) with thermally enhanced shear thickening effect for smart vibration attenuation system. It was developed by introducing Zr–fumarate metal-organic framework (MOF) crystals into a solvent mixture comprised of polyethylene glycol , polyacrylic acid and Ca 2+ , which endowed it with the cooperative effect of electrostatic and hydrophobic interactions . As the temperature raised from 25 to 35 °C, the STF containing 55 vol% MOF (STF-55) yielded a favorable shear thickening reinforcement with a notable viscosity growth of 1760-7953 Pa s. Besides, its storage modulus increased from 14 to 3036 Pa at 25–55 °C under a 0.1 Hz shear frequency, revealing a significant improvement in mechanical performance, as also demonstrated by transient shear rheological experiments. STF was incorporated into sandwich structures to improve the damping performance, with the natural frequency and damping ratio investigated at various ambient temperatures. Since the thermal enhanced viscosity could promote energy dissipation , the damping ratio of STF-55 filled sandwich structure obtained a substantial improvement from 0.85% to 1.93% at 25–55 °C. Thus, STF-55 based turbine blade and building damping pile were fabricated, which not only reduced the external vibration stimuli with average responsive accelerations of 7.3 and 0.8 m 2 s -1 , but also presented attenuated levels of 6.9 and 0.6 m 2 s -1 at increasing temperatures, respectively. In conclusion, this work provided guiding approach for highly adaptive vibration attenuation at high-temperature environment.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2022
·
IF 4.383
Mehboob Hassan,Mirza Mahmood Baig,Khalid Hussain Shah,Aftab Hussain,Syeda Aqsa Hassan,Arshad Ali
The synthesis of an economical and efficient bifunctional electrocatalyst for general water splitting is necessary for the fabrication of eco-friendly H 2 energy. Herein, state-of-the-art ZIF-67-based CoSe/MoSe 2 hybrid nanospheres were synthesized and examined as a bifunctional electrocatalyst for Hydrogen evolution reaction (HER) and Oxygen evolution (OER) in basic media. For the first time, a hierarchical well-designed CoSe/MoSe 2 hybrid nanospheres designed with the uniform distribution layered of 2D-MoSe 2 and conductive CoSe nanoparticles are acquired from CoMoO 4 via selenization. Due to its large surface area and extraordinary morphology, it exhibited significant catalytic activity, which leads to a small overpotential of 110 mV for HER and for 240 mV OER along with low Tafel values of 54.24 and 51.98 mV dec −1 , respectively. Surprisingly, the stability is marvelous and also comparable to the standard of HER and OER. The enhancement is endorsed by the increase in conductivity evolved from the porous nanospheres and the collaborative effect of Co/Mo. To deliver a current density of 10 mA per cm 2 for full water splitting 1.56 V is required, which is one of the least reported voltages. Therefore, this work leads to a new class of catalysts for the fabrication of an efficient water electrolyzer.
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IONICS
·
2022
·Vol. 28
·期 5
·2349-2362
·
IF 2.961
Han Jia-Jun,Yan Qi-ruo,Chen Zhao-wen,Wang Zhen,Chen Chao
Polyaniline (PANI) has been widely used for the energy storage applications either as a conducting agent or directly as an electroactive material due to the tunable pseudocapacitive performance owing to its various oxidation states. Nanocomposites including PANI, PANI/graphene oxide (PANI/GO), and PANI/GO/Cr-MOF were synthesized via a novel in situ chemical oxidative polymerization method including two oxidants. The structure and morphology of composites were characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM) measurements. Furthermore, PANI, PANI/GO, and PANI/GO/Cr-MOF were assembled as positive electrode materials into a button-type supercapacitor for electrochemical performance testing; the electrochemical performances of the composites were characterized by cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) techniques in detail. The ASC (asymmetric supercapacitors) possessed an extended potential window (0.8 V), an extraordinary specific capacitance (243.125 F/g at 0.5 A/g, 243 F/g at 1 A/g, and 242.5 F/g at 2 A/g, and these data fully demonstrate that this material has excellent rate performance), a remarkable cycling property (90.72% capacitance retention after 5000 cycles), and a satisfactory average energy and power density (21.56 wh/kg and 3.6 kW/kg).
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Science China-Materials
·
2022
·Vol. 65
·期 6
·1453-1462
·
IF 8.64
Sun Qiuhong,Zhu Kai,Ji Xiangli,Chen Dandan,Han Cheng,Li Ting-Ting,Hu Yue,Huang Shaoming,Qian Jinjie
The design and preparation of non-noble metal catalysts with high catalytic activity and robust stability are important in the research of metal-air batteries and fuel cells. Here, a three-dimensional (3D) hierarchically ordered porous carbon nanomaterial was conveniently synthesized with zeolite-imidazole framework (ZIF-8) carbonization using the silica-template method and carbon nanotube (CNT) growth. The addition of an iron source endows the porous mFeNC-CNT with Fe-based nanoparticles and abundant atomically dispersive Fe-N x sites from its nitrogen-incorporated graphitic carbon matrix. As a result, the 3D porous structure reduces the charge transport resistance, and the iron and nitrogen codoped carbon exhibits excellent catalytic activity for oxygen reduction reaction (ORR) similar to that of commercial Pt/C. Meanwhile, the interwoven CNTs obtained under urea catalysis further shorten the ion and electron diffusion pathway. Experimental and theoretical analyses revealed that the optimized mFeNC-CNT has a high ORR activity with a half-wave potential of 0.908 V and a large open-circuit voltage (1.556 V) when applied on zinc-air batteries. This work provides a promising strategy for the rational design and facile synthesis of high-performing non-noble metal-based electrocatalysts for energy storage, conversion, and transport applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Shasha Zheng,Huijie Zhou,Huaiguo Xue,Pierre Braunstein,Huan Pang
The poor conductivity, unsatisfactory stability and easy aggregation of metal–organic framework (MOF) nanomaterials have been recognized as the main reasons that prevent their practical application. Here, we report the highly conductive and cyclic-stable Ti 3 C 2 MXene@pillared-layer [Ni(thiophene-2,5-dicarboxylate)(4,4′-bipyridine)] n MOF composites (MXene@Ni-MOF). Based on the hard-soft-acid-base principle, the pillared-layer Ni-MOF porous structure with Ni-N coordination bonds confer better structural stability. The Ni-MOF nanosheets are immobilized by the MXene , leading to fast charge transfer between the Ni-MOF and MXene, solving the problem of poor conductivity of Ni-MOF, while avoiding the agglomeration of Ni-MOF nanosheets. Moreover, the strong interaction between the organic ligands of Ni-MOF and surface functional groups of MXene plays a key role: it reduces the exposure of surface groups of MXene, limits the oxidation of MXene, and increases its layer spacing, thus facilitating the rapid ion transport. The MXene@Ni-MOF exhibits a high specific capacitance (979 F g −1 at 0.5 A g −1 ) and the new aqueous asymmetric supercapacitor device displays an excellent cycling property with only 2% decay after 5000 cycles.
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