SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Meng Chen,Ning Gan,You Zhou,Tianhua Li,Qing Xu,Yuting Cao,Yinji Chen
A novel kind of electrochemical biocodes based on nanoscale metal organic framework (NMOF) was developed for simultaneous detection of multiple antibiotics such as kanamycin (KANA) and chloramphenicol (CAP). Herein, amine-functionalized NMOF (UiO-66-NH 2 ) was firstly employed as substrate to carry different metal ions (Pb 2+ or Cd 2+ ) respectively (M-NMOF). The adsorption capacities were 293.52 mg g −1 for Pb 2+ and 268.37 mg g −1 for Cd 2+ . Secondly, the M-NMOFs were respectively labeled with the complementary DNA strands of aptamers toward KANA and CAP to obtain two signal tags. Finally, both of the tags were conjugated with aptamers functionalized magnetic beads ( [email protected] /Apt2) to obtain the biocodes. Upon aptamers bound to targets (KANA and CAP) specifically, the corresponding M-NMOFs were released into supernatant after magnetic separation, which can be detected by square wave voltammetry (SWV). Results showed the high sensitivity with detection limits as low as 0.16 pM and 0.19 pM (S/N = 3) toward KANA and CAP respectively, which is 3 or 4 orders of magnitude lower than that of ELISA. Moreover, it exhibited excellent selectivity and more resistant to interference in food analysis. Furthermore, this NMOF based biocodes can be extended to other simultaneous detection system just by changing the aptamer and increasing the types of metal ions.
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高影响因子
ACS Applied Energy Materials
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2024
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IF 5.4
Wenqing Wei,Tingting Wei,Di Wang,Ka Wang,Zijing Guo,Hengdong Ren,Yong Zhou,Jian Chen,Xiaobing Xu,Xinglong Wu
Addressing the challenge of rapid electrolyte ion diffusion in supercapacitors is of paramount importance. The key lies in the meticulous design of electrode materials featuring tailored built-in electric fields to optimize ion diffusion and transfer kinetics. In this study, we embarked on the synthesis of a series of Co-doped Ni-metal–organic frameworks (Co:Ni-MOFs) with varying Co doping ratios, enabling us to regulate the inherent polarization electric field. By manipulating the Co dopant levels, we effectively induced the [NiN2O4] octahedral distortion in interlayers. This allowed for precise control of the polarization electric field, ultimately promoting the diffusion and transfer kinetics of electrolyte ions. Notably, in the case of Co:Ni-MOF-3 (with a molar ratio of approximately Ni/Co = 3:1), the cumulative built-in polarization electric field proved most conducive to the diffusion of electrolyte ions into the interior and pores of the material. This refined design resulted in a remarkable specific capacitance of 1515 F/g at a current density of 1 A/g for Co:Ni-MOF-3, surpassing the performance of most MOFs-based electrode materials reported to date. Our current approach unveils interesting insights into structural tuning and the enhancement of energy storage properties through MOFs, harnessing the potential of controlled doping and built-in electric field modifications.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Xiaomei Jiang,Min Ma,Yujie Cui,Boyang Lu,Zhiguo Lin,Fengzhi Jiang
To enhance the phosphate removal performance, a porous material (La MOF-20 %-C) was prepared by selectively removing the thermally unstable NH 2 -BDC ligand from a lanthanum dual organic ligand MOF through pyrolysis. This innovative approach equips La-MOF-20 %-C with dual functionalities: high phosphate adsorption capacity and robust antibacterial effects. The adsorbent showcased a remarkable phosphate adsorption capacity of 97.24 mg P/g and reached equilibrium within 90 min. The material exhibits good anti-interference capability, and the presence of multiple coexisting ions does not affect its adsorption performance. Additionally, it can be used over a wide pH range (3.0–8.0) and has good reusability. Mechanistic studies indicated that electrostatic attraction and ligand exchange were the primary mechanisms for phosphate adsorption. Moreover, La MOF-20 %-C effectively inhibited the metabolic activities of Escherichia coli and Staphylococcus aureus through phosphorus starvation and electrostatic attraction, demonstrating significant antibacterial properties. Importantly, the fabrication of this material into a filter membrane enabled the successful treatment of 16.8 L of actual wastewater, achieving an overall phosphate removal rate of over 85 %, and effectively removing total bacteria. These findings highlight La MOF-20 %-C as a highly promising material with dual functionality for phosphate removal and bacterial inhibition.
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高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Hui Li,Xinlei Ren,Wenxue Pan,Shiting Zhu,Jin Zhang,Zhiyuan Yang,Liu Qian,Yueying Wang,Yujing Huang,Lin Guo,Minghui Xiang
The reasonable control of the structure of metal–organic frameworks (MOFs) is a promising strategy for improving their peroxymonosulfate (PMS) activation activity. In this study, ZIF-67 @ZIF-8 was used as a template to prepare bimetallic core–shell Co-Fe@NC via Fe doping and high-temperature carbonization . Co-Fe@NC maintained the core–shell structure of the original MOF, in which cobalt was uniformly distributed in the nitrogen-doped graphite carbon skeleton and the surface of the graphite carbon skeleton was covered with iron. With the synergistic effect of the nitrogen-doped graphite carbon skeleton, iron, and cobalt, 100% of tetrabromobisphenol S (TBBPS) was removed in 60 min with k obs = 0.062 min −1 in Co-Fe@NC-0.2/PMS system. The addition of iron increased the graphitization degree with I D /I G value increased from 0.98 (Co@NC) to 1.034 (Co-Fe@NC-0.2) and electron transfer rate of the carbon skeleton. Besides, the Co leaching was effectively attenuated from 1.86 mg/L(Co@NC) to 0.78 mg/L (Co-Fe@NC-0.2) by the core-shell structure and bimetal strategy. Both O 2 · - and 1 O 2 contributed to the degradation of TBBPS according to quenching experiments. TBBPS was deeply degraded into small-molecule compounds through three degradation pathways by the Co-Fe@NC-0.2/PMS system. This study provides a new strategy for designing highly efficient bimetal–carbon composites for environmental remediation.
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COMPOSITES PART B-ENGINEERING
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2024
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IF 12.7
Wenqi Zhao,Hang Jia,Yue Qiao,Yu Zhang,Junyi Wu,Xigao Jian,Cheng Liu
The interfacial bonding of carbon fiber reinforced polymer composites plays a critical role in the overall performance of the composites. Poor interfacial bonding leads to catastrophic damage of composites when subjected to external loads. In this study, three-dimensional (3D) NH 2 -UiO-66 nanoparticles in-situ synthesis on the carbon fiber (CF) surface using an electrochemical method was achieved facilely and efficiently to enhance the interfacial adhesion of CF/PBPESK composites. The influence of incorporating 3D NH 2 -UiO-66 nanoparticles into the interphase on the interfacial and mechanical properties of carbon fiber reinforced composites was systematically investigated. The NH 2 -UiO-66 nanoparticles significantly increased the carbon fibers surface energy. The flexural, interlaminar shear and interfacial shear strength of the N–CF–6min/PBPESK composite were improved by 19 %, 31 %, and 93 %, respectively, compared to the D-CF/PBPESK composite. Furthermore, the interfacial failure mechanism of the composites was investigated. This approach offered a simple and efficient strategy for the in-situ synthesis of interfacial phase characterized by robust mechanical locking effects.
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高影响因子
FUEL
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2024
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IF 6.7
Nimra Muzaffar,Imad Barsoum,Amir Muhammad Afzal,Muhammad Waqas Iqbal,Zubair Ahmad,Areej S. Alqarni,Shams A.M. Issa,H.M.H. Zakaly
Monosodium glutamate (MSG), a sodium salt that comes from a non-essential amino acid, is generally employed as a flavor accompaniment in numerous diet recipes. Metal oxides containing oxygen vacancies present a potential opportunity for utilization as charge storage materials in supercapattery applications. This work illustrates the fabrication of the MoLa 2 O 4 @Co-MOF@rGO nanocomposite via a combination of hydrothermal and modified Hummer methods. The structure of the fabricated MoLa 2 O 4 @Co-MOF@rGO nanocomposite was assessed by utilizing scanning electron microscopy (SEM), whereas the structural analysis was conducted via X-ray diffraction (XRD). The superior electrochemical parameters of the MoLa 2 O 4 @Co-MOF@rGO nanocomposite over pure MoLa 2 O 4 and MoLa 2 O 4 @Co-MOF were ascribed to the combined effect of MoLa 2 O 4 , Co-MOF, and rGO. The specific capacitance (Cs) of 310.1 Fg −1 was achieved for MoLa 2 O 4 and 626.8 Fg −1 for MoLa 2 O 4 @Co-MOF. Among all samples, the MoLa 2 O 4 @Co-MOF@rGO electrode demonstrates an extraordinary Cs of 1716 Fg −1 at 3 mVs −1 . The energy storage mechanism is explained using the using Randles–Ševčík and Dunn’s models. The MoLa 2 O 4 @Co-MOF@rGO//activated carbon (AC) asymmetric supercapacitor configuration demonstrates the Cs of 1470 Fg −1 at 3 mVs −1 along with a particular energy of 58 Whkg −1 and a power density (P d ) of 2500 Wkg −1 . A MoLa 2 O 4 @Co-MOF@rGO nanocomposite-based amperometric immunosensor was designed to detect monosodium glutamate (MSG). A linear relationship was consistently detected between MSG concentration and the associated current change across the complete detection range of 0.05–200 μM. The multifunctional MoLa 2 O 4 @Co-MOF@rGO ternary nanocomposite electrode material opens up new prospects for designing hybrid devices in energy harvesting and food-related applications.
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Molecular Catalysis
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2024
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IF 3.9
Yin Wang,Haihong Xia,Fei Ge,Yanrong Wang,Xiaohui Yang,Jianchun Jiang,Minghao Zhou
The catalytic conversion of 5-hydroxymethylfurfural (5-HMF) to value-added chemicals was quite vital for the conversion and utilization of biomass resources. The development of novel and efficient catalysts was of great significance. In this work, a series of tannic acid doped catalysts (Ni-Co/TA@C) were prepared by hydrothermal self-assembly method using lignosulfonate as a building block and coordinating with metal ions Ni 2+ and Co 2+ . The effects of different preparation conditions and reaction conditions on the performance of the catalysts were investigated, and the optimal conditions for catalytic transfer hydrogenation were also explored. The results showed that the conversion of 5-HMF was 99.97% and the yield of 2,5-dimethyl furan (DMF) was as high as 87.10% with Ni 2 Co/TA@C as catalyst under mild reaction conditions (240 °C, 2 MPa N 2 , 4h). The surface morphology, surface area and composition of the catalysts were characterized in detail. The Ni 2 Co/TA@C catalyst had higher total acidity and larger amount of strong acid sites, which was conducive to highly selective catalytic transfer hydrogenation (CTH) of DMF, and the larger specific surface area also promoted the dispersion and loading of Ni and Co. This study provided some novel findings for the construction of catalysts for biomass conversion.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Kexin Zheng,Xiaochun Gao,Yuhan Xie,Ziyang He,Yujiao Ma,Shaoqi Hou,Dawei Su,Xiaoguang Ma
Understanding of the structure and interfacial merits that reactive metal–organic frameworks (MOFs) undergo is critical for constructing efficient catalysts for non-thermal plasma-assisted conversion of greenhouse gases. Herein, we proposed a free-standing bimetallic (Co/Ni) MOFs supported on bacterial cellulose (BC) foams (Co/Ni-MOF@BC) toward the coaxial dielectric barrier discharge (DBD) plasma-catalytic system, of which the Co/Ni ions coordination demonstrated an intriguing textual uplifting of the malleable BC nanofiber network with abundant pores up to micrometer-scale, which could impart a more intensive predominant filamentary microdischarge current to 180 mA with stronger plasma-catalytic interaction. Remarkably, compared to the monometallic MOF@BC foams, this bimetallic Co/Ni-MOF@BC also delivered a substantially improved alkaline absorption ability as further confirmed by the CO 2 - temperature-programmed desorption (TPD) result. Benefiting from its 3D superiority and synergy of Co/Ni dual-regulation, the Co/Ni-MOF@BC, therefore, displayed the highest CO 2 and CH 4 conversion rates to 52.31 % and 71.50 %, which was above 1.5 and 1.3 times higher than those of monometallic counterparts and Co/Ni-MOF powder. Additionally, its robust cycling performance has also been evidenced by the excellent long-time DRM performance, unchanged crystallinity, morphology, and surface chemical states. By taking both the catalyst existing form and interfacial optimization of MOFs into consideration for designing a unique DRM catalyst, we believed this free-standing 3D Co/Ni-MOF@BC foams could inspire more research outputs on the design of functional catalysts with abundant pores and alkaline absorption sites to accelerate the redox kinetics of CO 2 /CH 4 conversion.
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PubMed
高影响因子
Journal of Materials Chemistry A
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2024
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IF 10.7
You Xu,Zhengyun Wang,Xianbao Wang,Zhenzhen Guo,Muhammad Sultan Irshad,Naila Arshad,Jiang Gong,Hongfang Liu,Guangfang Li
Harvesting solar energy for efficient photothermal conversion and steam generation over solar evaporators is particularly significant in the context of comprehensive solar utilization toward solving the global shortage of fresh water. Herein, a flexible Ni-based metal–organic framework composite (NMC) with hierarchical structures is constructed as a photothermal material for solar steam-generation devices. Besides, a phase change material (PCM)-based thermal storage pack is incorporated into the solar evaporator to overcome the solar radiation intermittency. By virtue of the synergistic effect of the promising 3D structure and excellent water transport, the NMC-PCM evaporator possesses an outstanding evaporation performance (2.55 kg m−2 h−1) under 1 sun irradiation. More strikingly, owing to the enhanced light-to-heat performance as well as large heat storage capacity, the proposed evaporator achieves a high water-evaporation rate of 1.46 kg m−2 h−1 without sunlight irradiation. This work opens up opportunities to realize excellent energy capture for solar-driven clean water production and solar thermal storage not only under sunlight incidence but also in no light environment.
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高影响因子
CARBON
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2025
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IF 11.6
Zi-cheng Tang,Yu-long Liu,Zi-jie Huang,Qin Wang,De-xiang Sun,Jing-hui Yang,Xiao-dong Qi,Yong Wang
Solid-liquid phase change materials (PCMs) suffer from liquid phase leakage, limited heat conductivity, and insufficient light absorption, which provide significant obstacles for solar energy storage. In this study, Zn–Co bimetallic ZIF structures with three morphologies were assembled on melamine foam (MF) by different synthesis conditions, followed by high-temperature carbonization to fabricate a hierarchical framework, in which ZIF-derived carbon layers integrated into carbonized melamine foam (CMF). Upon encapsulating energy storage unit paraffin wax (PW), the resultant CMF@Co–N/C/PW composite PCMs demonstrated superior encapsulation performance, enhanced thermal conductivity, excellent capacity for photothermal conversion and thermal storage. The hierarchical framework was comprised of ZIF-derived carbon nanostructures integrated with three-dimensional carbon skeleton, which provided a dual encapsulation effect and achieved a dimensional retention ratio of 95.71 %. Additionally, CMF@Co–N/C/PW exhibited a high phase change latent heat of 220.90 J/g and proved to be a reliable long-term thermal cycle system. Benefiting from the continuous carbon skeleton, CMF@Co–N/C/PW exhibited a noteworthy enhancement in thermal conductivity, showing a 100 % increase compared to pristine PW. More importantly, the impressive photothermal conversion efficiency of up to 93.65 % was attributed to the synergistic effects of Co nanoparticles, nitrogen-doped defective carbon, and multiple light scattering and absorption of the hierarchical network. The developed composite PCMs hold considerable promise in solar energy conversion applications.
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高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Qinghao Xiong,Shouhui Chen,Longsheng Pei,Jianming Liu,Yinan Yang,Meilin Lu,Yonghai Song
Covalent-organic frameworks (COF) and metal–organic frameworks (MOF) were promising precursors for porous carbon-based materials. Calcining individual COF or MOF is usually unfavorable when preparing electrochemical active materials that combine sensitivity, stability, and selectivity. In this work, calcining a core–shell structural Ni-MOF@COF TAPB-DVA prepared a yolk-shell structural composite (YS-Ni@NC), in which the N-doped carbon shell (NC) encapsulated the Ni nanoparticles yolk (NiNPs). A highly selective dopamine electrochemical sensor (YS-Ni@NC/GCE) was developed based on the YS-Ni@NC modified glassy carbon electrode (GCE). The NiNPs yolk in the derivates provided excellent electrocatalytic activity, and the N-doped carbon shell improved the composite conductivity, enhanced the structural stability, and reduced the nonspecific adsorption of uric acid and ascorbic acid through electrostatic repulsion force. The YS-Ni@NC/GCE electrode exhibited higher selectivity for dopamine than the control electrodes in the presence of uric acid and ascorbic acid due to the electrostatic interaction between YS-Ni@NC and the small molecules. At the optimal experimental conditions, the DA sensor showed a linear concentration range of 0.136∼70.0 μM with a detection limit of 0.041 μM. In addition, the electrochemical performance of the sensor was stable when stored at room temperature for 30 days. Preparation of the yolk-shell structural MOF@COF derivates provided a new approach for fabricating highly selective non-enzymatic dopamine electrochemical sensors.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
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IF 4.1
Cheng Guo,Xuehai Ren,Changyan Guo,Naeem Akram,Muhammad Saad Mansha,Ali Ahmad,Saman Khawaja,Jide Wang
In this study, the CdS/Ni-MOF74 (CNM) photocatalyst was synthesized via the combination of CdS with the advantageous properties of MOFs. The composites exhibit a wide visible absorption and photo electron-hole separation efficiency, thus giving improved bifunctional properties for H 2 evolution in conjunction with the benzyl alcohol’s oxidation. The results indicate that as synthesized CNM3 catalyst shows excellent efficiency of hydrogen evolution having an evolution rate of 5783 µmol g −1 h −1 , and the amount of benzaldehyde generated after benzyl alcohol’s oxidation reached 8059.8 µmol g −1 . After four cycles, the H 2 evolution efficiency remained at 5351 µmol g −1 h −1 . According to experiments using radical trapping and mechanistic investigations, it was revealed that the photogenerated holes (h + ) were the key species mainly responsible for benzaldehyde production as well as H 2 evolution. This research work could lead to new approaches resulting in simultaneous organic oxidation processes and hydrogen evolution by using MOF-derived hybrid photocatalysts.
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