CELLULOSE
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2021
·Vol. 28
·期 5
·3097-3112
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IF 5.044
Huang Qiumei,Zhao Chuanshan,Li Xia
The separator is a key component of the lithium-ion battery (LIB), which not only prevents the anode and the cathode from contacting, but is also related to the performance of the LIB. However, the widely used polyolefin separator has the disadvantages of inferior electrolyte retention capability and poor electrolyte wettability. Therefore, the development of high-performance separators for LIB has attracted widespread attention. In order to enhance the electrolyte retention capacity of the separator, the bacterial cellulose (BC)/zeolitic imidazolate framework-67 (ZIF-67) composite separator was prepared by introducing ZIF-67 on the BC nanofibers. It was found that the introduction of ZIF-67 in BC membrane significantly improved the pore structure and enhanced the electrolyte retention capability, thus contributing to the transfer of lithium-ion, increasing the ionic conductivity (0.837 mS cm −1 ). In terms of ionic conductivity, BC/ZIF-67 separator has achieved a great improvement compared to polypropylene (PP) separator (0.096 mS cm −1 ). Besides, the prepared BC/ZIF-67 composite separators hardly shrink at high temperatures. The discharge capacity retention of the LIB using BC/ZIF-67 separator was 91.41% after 100 cycles (0.2 C). Meanwhile, LIB with BC/ZIF-67 separator showed a large discharge capacity (156 mAh g −1 ) and improved rate performance. Therefore, the BC/ZIF-67 composite membrane has good development potential in the direction of LIB separator. Graphic abstract
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APPLIED CATALYSIS A-GENERAL
·
2020
·
IF 5.006
Peng Zhang,Ziyan Wang,Yan Zhang,Jian Wang,Wenqing Li,Lina Li,Peiping Zhang,Cundi Wei,Shiding Miao
In this work a Pd/Fe-Co-Ni layered double hydroxide (LDH) composite was prepared and investigated in the semi-hydrogenation of 2-methyl-3-butyn-2-ol (MBY). Hollow nanocages of ternary Fe-Co-Ni LDH were constructed by stacking the LDH nanosheets edge-to-face which inherited the rhombic dodecahedral structure of ZIF-67 templates. Uniform palladium (Pd) nanocrystals with cubic shapes were imbedded in the LDH nanocages via a solvothermal method. The hydroxyl groups on LDH supports were critical to inhibit the association of excess hydrogen atoms on the catalyst, so less MBY molecules were converted to 2-methyl-2-butanol (MBA) during the hydrogenation catalysis. Under optimized reaction conditions the hydrogenation activity of Pd/Fe-Co-Ni LDH was significantly improved, and the conversion of MBY was higher than 99% with selectivity of 2-methyl-3-buten-2-ol (MBE) exceeding 99%. The catalyst was easily recovered and had little reduction in catalytic performance during the cycling reactions.
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高影响因子
MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Hao Guo,Tian Fan,Wenqin Yao,Wenhu Yang,Ning Wu,Hui Liu,Mingyue Wang,Wu Yang
Herein, a novel electrochemical sensor based on ZIF-67/MWCNT-COOH/Nafion composite was designed and prepared for simultaneous detection of 4-aminophenol (4-AP) and acetaminophen (AMP). The electrochemical behaviors of the 4-AP and AMP on the ZIF-67/MWCNT-COOH/Nafion electrode were explored via cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The results exhibited that the designed electrochemical sensor possessed superior electrocatalytic activity for 4-AP and AMP, which was attributed to the highly ordered porous structure of ZIF-67, the outstanding electrical conductivity and high electrocatalytic activity of MWCNT-COOH. Under optimization conditions, the DPV response of the prepared electrode depicted a wider linear response concentration range of 0.2 to 200 μM for 4-AP, and 0.1 to 100 μM for AMP, respectively. And the lower detection limits (LOD) of 0.01 and 0.07 μM were obtained for 4-AP and AMP, respectively. More importantly, the acquired electrode was applied to Yellow river water and Paracetamol tablets for analysis of 4-AP and AMP, which exhibited satisfying recovery of 98.2% ~ 106.7% for 4-AP and 94.7% ~ 99.6% for AMP, respectively. In a word, the constructed electrochemical sensing platform delivered a promising potential in real application.
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Journal of Inorganic and Organometallic Polymers and Materials
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2023
·
IF 4
Lu Danli,He Zhiping,Liu Weiliang
In this work, a novel NiCo/ZIF-67/rGO catalyst was prepared via a facile impregnation-reduction method, followed by comprehensive characterization using XRD, SEM, TEM, XPS, and ICP-OES techniques. This catalyst featured a hierarchical porous support consisting of Zeolitic Imidazolate Framework-67 (ZIF-67) with a high specific surface area and reduced graphene oxide (rGO) with considerable electronic conductivity, along with strong synergistic interactions between Ni and Co species as well as between the deposited metals and the carbon in rGO. The NiCo/ZIF-67/rGO catalyst exhibited excellent activity in catalyzing the hydrolysis of NaBH 4 , resulting in a low activation energy ( E a ) of 21.08 kJ mol −1 and a high turnover frequency (TOF) value of 5420 \(mL_{{\textit{H}}_\text{2}}g_\textit{M}^{-1}\min^{-1}\) . The hydrogen generation rate was increased by nearly double after five cyclic experiments, demonstrating the exceptional catalytic durability of NiCo/ZIF-67/rGO. The as-prepared NiCo/ZIF-67/rGO catalyst exhibits the advantages of cost-effectiveness, durability, and superior performance for NaBH 4 hydrolysis, rendering it a promising candidate for industrial applications.
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Separations
·
2021
·Vol. 8
·期 2
·22
·
IF 2.777
Pei Chen,Xiaoman Li,Xuemin Yan,Minglei Tian
(1) Background: ZIF-67 is one of the most intriguing metal–organic frameworks already applied in liquid adsorption. To increase its adsorption performance, dual ionic liquids were immobilized on ZIF-67 in this research; (2) Methods: The obtained sorbent was used to adsorb aristolochic acid I (AAI) in standard solutions. Then, the sorbent was applied in solid-phase extraction to remove AAI fromFibraurea Recisa Pierreextracted solution. (3) Results: By analyzing the adsorption models, the highest adsorption capacity of immobilized sorbent (50.9 mg/g) was obtained at 25 °C within 120 min. In the SPE process, 0.02 mg of AAI was removed per gram of herbal plant, the adequate recoveries were in the range of 96.2–100.0%, and RSDs were 3.5–4.0%; (4) Conclusions: The provided experimental data revealed that ZIF-67@EIM-MIM was an excellent potential sorbent to adsorb and remove AAI from herbal plant extract, and the successful separation indicated that this sorbent could be an ideal material for the pretreatment of herbal plants containing AAI.Keywords:dual ionic liquids;metal–organic framework;aristolochic acid I;Fibraurea Recisa Pierre
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2022
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IF 6.76
Yizhen Yu,Bingzhi Li,Yinsha Wei,Xinyue Ren,Fengsai Bie,Yang Xu,Ri Qiu,Xiaoguang Li,Yibo Ouyang
In the harsh environment, the corrosion of Cu leads to the failure of pipelines, condenser, printed circuit board and so forth. Thus, protecting Cu from corrosion is critically important from both science and engineering backgrounds. In this report, the hierarchical structure compositing dendritic Cu and ZIF-67 is prepared onto Cu by a two-step electrodeposition protocol. After thiol modification and oil infusion, bio-inspired superhydrophobic surface (SHS) and slippery liquid-infused porous surface (SLIPS) is respectively achieved, and sophisticated techniques are used for characterizing chemical composition, morphology, topology and wettability. Scanning Kelvin probe is employed to know the surface potential distribution before and after the biomimetic transformation. Using different electrochemical approaches, the corrosion inhibition effect is elucidated. In 3.5 wt% NaCl corrosive medium, |Z| 0.01Hz of SLIPS is as high as 1.35 × 10 8 Ω·cm 2 at the initial immersion stage. The value is remarkably enhanced compared with SHS (6.76 × 10 4 Ω·cm 2 ) and bare Cu (8.74 × 10 3 Ω·cm 2 ). After soaking for 168 h, |Z| 0.01Hz value of SHS and SLIPS is 3.84 × 10 4 Ω·cm 2 and 4.93 × 10 6 Ω·cm 2 , illustrating that SLIPS has high resistance to protect Cu from corrosion.
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Journal of Energy Storage
·
2023
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IF 9.4
Jiongfan Wang,Xin Chen,Lingling Chen,Xinyu Li,Jianrong Xiao
The shuttle effect of polysulfide and slow reaction kinetics has hindered the commercialization of lithium–sulfur batteries. Here, metal organic framework (MOF)-derived nitrogen-doped carbon was used as templates, and the continuous interspersed filamentary network structure of multi-walled carbon nanotubes (MWCNT) was used as a modifier to synthesize Co-NC@MWCNT. The exposure of Co-MOF with a high density of catalytic sites in the pores effectively improves the sulfur stability capacity of the composite and inhibits the shuttle effect. The outermost layer of coated MWCNTs and the intermediate layer of N-doped porous carbon effectively protected the Co 2+ active site of the dodecahedral configuration from easy deactivation and agglomeration. The prepared Co-NC@MWCNT composite had an initial discharge capacity of 1240 mA h g −1 (0.1C), it maintained a low decay rate of 0.054 % after 1000 cycles (0.5C). The graphite-like layer gap and multilayer tube structure of the networked MWCNT can effectively mitigate volume expansion during charging and discharging and provide Li + transport channels to improve electrical conductivity . Moreover, the energy storage devices developed as part of this work have excellent electrochemical properties and have a noteworthy industrial potential.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
·
IF 7.2
Yan Shang,Jing Xu,Yue Ma,Zezhong Li,Qian Li
Photocatalytic hydrogen production was a potential strategy to solve energy shortage and environmental pollution. One of the valuable research directions for improving photocatalytic efficiency was to prepare catalysts in an efficient and low-cost way. Lamellar Sm 2 WO 6 and dodecahedron Zeolitic Imidazolate Framework-67 (ZIF-67) have been prepared successfully based on morphology control. Sm 2 WO 6 /ZIF-67 was prepared by a novel in situ growth scheme, which was confirmed by crystal structure, morphology and elemental composition analysis . The close interaction between Sm 2 WO 6 and ZIF-67 was confirmed by photoelectrochemical measurements. Based on the design of band structure , the S-type heterojunction was constructed. The research results of this paper provided a reference for exploring non-noble metal composite materials and demonstrated great potential in photocatalytic.
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IONICS
·
2023
·Vol. 29
·期 5
·1741-1749
·
IF 2.8
Xiong Qiming,Li Xiongzhuang,Zhou Mulan,Chen Rentian,Sun Cheng,Zhou Yanyan,Wang Sijia,Qiu Xiangyun,Song Meijia,Wei Tao
Nickel cobalt layered double hydroxide (NiCo-LDH) nanosheets have attracted much interests in lithium-ion batteries (LIBs) because of its high capacity and low cost. However, the low cycling stability limits their practical applications. Herein, we introduce a simple one-pot hydrothermal method to fabricate a novel flower-shaped Zif-67@NiCo-LDH heterostructure as the anode materials. The structures, morphology, and compositions of the materials were studied by XRD, SEM, TEM, XPS, EDX, and Raman spectra. Electrochemical tests were also conducted. The Zif-67@NiCo-LDH simultaneously inherited the cycling stability of Zif-67 and the high capacity of NiCo-LDH, which effectively improves the conductivity and structural integrity under the synergistic effect of the flower-shaped heterostructures and compositions and showed a good electrochemical performance. This work might enable the future design of heterostructures materials with layered double hydroxide for many other energy-storage technologies.
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ANALYTICA CHIMICA ACTA
·
2022
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IF 6.911
Shan Xu,Peifang Chen,Xichi Lin,Imran Mahmood Khan,Xiaoyuan Ma,Zhouping Wang
Histamine is a significant biomarker to assess the freshness of fish products. In this study, a novel MOF-based SERS sensor for histamine determination was synthesized by wrapping PVP-capped Au nanoflowers with a ZIF-67 shell (Au [email protected] ). The highly branched Au NFs core exhibited a strong electromagnetic field enhancement effect and provided an ultra-sensitive SERS fingerprint spectrum, while ZIF-67 shell was the contributor to enrich the target and stabilize the substrate. The morphology of the core-shell structures can be easily controlled by the concentrations of the capping agent PVP and MOF precursor Co ion . Consequently, 4-MBA pre-grafted on the optimized SERS substrate can act as the Raman internal standard (IS) to eliminate signal fluctuations through standardizing all spectra against its peak at 1074 cm −1 . Moreover, as the specific receptor for histamine molecules, 4-MBA helped reach the low detection sensitivity, where the SERS intensity ratio, I 1172 /I 1074 presented a good linear relationship towards the histamine concentrations (10 −3 -10 −7 M) with the LOD of 0.87 × 10 −7 M (R 2 = 0.9930). Furthermore, the application in monitoring fish spoilage process demonstrated the feasibility and reliability of the developed sensor. This work provided a facile strategy to construct MOF-based SERS substrate as a potential platform for the shelf-life prediction of fish products.
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PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2018
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IF 5.116
Xiaona Ren,Fenglei Lyu,Jian Yang,Fangyuan Wang,Linlin Xue,Li Wang,Xiangwen Zhang,Qingfa Wang
To develop highly efficient non-noble-metal electrocatalysts for oxygen evolution reaction is still a great challenge. Herein, cobalt and iron oxide with hollow structure has been fabricated using ZIF-67 as template, via reflux process followed by calcination . The simultaneous structural and electronic modulation are achieved due to the homogenous Fe incorporation. The Co sites in higher oxidation states and Fe sites with higher electron density can enhance the adsorption of H 2 O molecules and OOH species, and thus promote the water oxidation . The unique hollow structure also facilitates the mass transfer at the interface of electrolyte and active atoms. The optimal cobalt and iron oxide hollow nanocages exhibit superior OER performance, delivering an ultralow overpotential of 274 mV at 10 mA cm −2 and a very small Tafel slope of 31 mV dec −1 in alkaline media, which outperform the state-of-the-art RuO 2 . This work provides an efficient approach to design and explore non-precious electrocatalysts for electrochemical energy conversion and storage.
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RSC Advances
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2018
·Vol. 8
·期 46
·26377-26382
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IF 2.936
Lin Peng,Xiaobo Gong,Xinghong Wang,Zhao Yang,Yong Liu
Advanced oxidation processes based on sulfate radicals have been widely used to eliminate contaminants. In this study, an efficient cobalt-based three-dimensional heterogeneous catalyst was fabricated through in situ growth of ZIF-67 on nickel foam (NF/ZIF-67). The factors influencing NF/ZIF-67-activated peroxymonosulfate (PMS) were investigated. Enhanced RhB degradation was observed using NF/ZIF-67-activated PMS under neutral conditions and high temperatures. Sulfate radicals were the dominant active species for the oxidative decolorization of RhB with NF/ZIF-67-activated PMS. NF/ZIF-67 was easily separated from the solution, and it also retained high catalytic stability. This study provides a rapid and mild method for the fabrication of promising three-dimensional heterogeneous catalysts for PMS activation and wastewater treatment.
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PubMed
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