JOURNAL OF SOLID STATE CHEMISTRY
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2019
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IF 2.291
Wei Shuang,Ang Li,Dan-Hong Wang,Ze Chang
A new method for the facile synthesis of quantum dots (QDs) with MOF as precursor is reported herein. As a proof of concept, ZnS QDs were synthesized by sulfuring zeolitic imidazolate framework-8 (ZIF-8) nanoparticles under mild conditions without high temperature and highly toxic reagents. Also, ZnS/CdS and ZnS/CuS QDs were obtained through facile cation exchange strategy with the ZnS QDs. These metal sulfides QDs exhibit tunable optical absorption and band gap by modulating the metal components.
研究领域:
材料科学
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纳米技术
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无机化学
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光学材料
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2023
·Vol. 47
·期 8
·4103-4112
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IF 3.3
Ke Yang,Guoning Chen,Lu Wang,Miao Guo,Jiameng Xu,Yirong Ma,Zhimin Luo,Aiguo Zeng,Qiang Fu
Co-immobilization strategies are available to improve the catalytic activity, stability and reusability of enzymes. It has been frequently applied in recent year in reactions involving multi-step catalysis to optimize the performance. In this study, a zeolitic-imidazolate framework 8 (ZIF-8)-based nanoreactor (Chox&HRP@ZIF-8) including cholesterol oxidase (Chox) and horseradish peroxidase (HRP) was developed successfully. The Chox&HRP@ZIF-8 was characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and Fourier transform infrared spectroscopy, respectively. The as-prepared materials were used as a biocatalytic system to realize the cascade reaction initiated by Chox and HRP. Next, the investigation of the catalytic activity and stability of Chox&HRP@ZIF-8 was performed in extreme environments. The results showed that the stability of the prepared Chox&HRP@ZIF-8 was significantly improved compared with that of free enzymes. In addition, the assay method for cholesterol detection developed based on Chox&HRP@ZIF-8 as the biocatalytic system showed high selectivity and good interference resistance. It was successfully applied to the determination of cholesterol in mice serum. It is worth mentioning that the relative activity of co-localized Chox&HRP remained above 60% after 5 cycles for cholesterol detection, confirming the feasibility of the multi-enzyme immobilization strategy using ZIF-8 as a carrier in the cascade reaction.
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Sustainable Energy & Fuels
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2023
·Vol. 7
·期 5
·1245-1255
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IF 5.6
Furong Zhang,Kunpeng Jiang,Guisheng Zhu,Huarui Xu,Xiuyun Zhang,Yunyun Zhao,Yejun Zhang,Qiangbin Wang,Pengfei Pang,Aibing Yu
Solid-state lithium batteries (SSLBs) are promising energy-storage devices. However, the low ionic conductivity of solid electrolytes and poor interface stability are two challenges to their commercial application. To alleviate these problems, we investigated three different composite modes of ZIF-8 and SiO2: (1) mechanical mixing of ZIF-8 and mesoporous SiO2 (ZIF-8+SiO2); (2) mesoporous SiO2 spheres adsorbed on the surface of ZIF-8 (ZIF-8/SiO2); (3) mesoporous SiO2 shell deposited on the surface of ZIF-8 (ZIF-8@SiO2). In particular, ZIF-8@SiO2/IL was obtained when ZIF-8@SiO2 with a hierarchical pore structure was used as the host of the Li+-containing ionic liquid (IL). By combining ZIF-8@SiO2/IL as a filler with polyethylene oxide and lithium bis(trifluoromethanesulfonyl)imide, the composite electrolyte (PZS-3) showed excellent performance. PZS-3 showed a high ionic conductivity (2.35 × 10−4 S cm−1 at 30 °C), wide electrochemical stability window (5.5 V), and high Li+ transference number (0.6), and excellent compatibility with the Li metal and electrodes. An SSLB composed of LiFePO4/PZS-3/Li exhibited outstanding cycling stability with an initial discharge capacity of 155.6 mA h g−1 at 0.2 C and capacity retention of 96.5% after 100 cycles. This novel design strategy offers a promising approach for MOFs composited with other inorganic materials to construct prospective hierarchical Li+ channels.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2022
·
IF 5.876
Chengyuan Duan,Yi Feng,Yuming Xie,Meili Ding,Jianfeng Yao
A facile one-step synthetic strategy is proposed here to realize simultaneous amine-functionalized and Fe-doping modification of ZIF-8, aiming to optimize the Lewis acidic and basic properties of ZIF-8 for enhanced CO 2 adsorption and subsequent cycloaddition reaction of CO 2 and epichlorohydrin under solvent-free and relatively mild conditions (0.1 MPa and 80 °C). The obtained Fe-ZIF-8-NH 2 exhibits an improved CO 2 adsorption capacity of 63 mmol/g as compared to that of 18 mmol/g for pristine ZIF-8 and delivers a high catalytic CO 2 cycloaddition efficiency with the yield of target product of 92%, much higher than that of Fe-ZIF-8 (80%), ZIF-8-NH 2 (62%) and pristine ZIF-8 (40%). The improved performance can be attributed to the introduction of abundant –NH 2 groups and Fe-doping that enrich the Lewis acidity and basicity. Moreover, the obtained Fe-ZIF-8-NH 2 also exhibits high chemical stability and satisfactory recycling ability, which makes the obtained sample a promising catalyst for CO 2 capture and utilization.
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高影响因子
Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Sihan Wang,Kai Yao,Zhiwei He,Bing Shao,Jianzhong Shen,Haiyang Jiang
ZIF-8 is a type of porous coordination metal-organic frameworks (MOFs) material with excellent adsorption properties. However, the inevitable acid-base sensitivity and low plasticity of ZIF-8 impede its application to the field of compound adsorption and separation. Here, a novel reusable monolithic MOFs foam material, polysaccharides (CMC & chitin) gels zeolitic imidazolate frameworks (PC-ZIF-8), has been developed to effectively adsorb five Phenolic Endocrine Disrupting Chemicals (PEDCs) from environmental water. In this study, the forming strategy of a continuous phase change sol-gel MOFs material was designed. The carboxymethyl cellulose and chitin hydrosol were used as the self-assembly medium for in-situ synthesizing sol-type MOFs by a one-step method. Several favorable characteristics of PC-ZIF-8 have been confirmed, including large surface area (619.47 m 2 /g), low density (<0.085 g/cm 3 ), high ZIF-8 loading rate (>80%, wt%), high structural strength, high acid, and alkali tolerance, and easy recyclability . The adsorption efficiency of PC-ZIF-8 for 5 BPs in water is 92.97%− 99.12%, and the maximum adsorption capacity is 120.1–172.9 mg/g. After simple regeneration treatment, PC-ZIF-8 has been recycled 5 times, and the overall recovery rate still remains above 80.0%. The results of this study indicate that PC-ZIF-8 is a reliable adsorbent for BPs in environmental water purification .
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Xianjin Gong,Jie Wang,Ying Shi,Qiang Zhang,Weixing Liu,Shan Wang,Jinlei Tian,Guichang Wang
Aqueous zinc ion batteries (AZIBs) are considered as one of the most promising alternatives for lithium-ion battery because of its high theoretical capacity, mild reaction with water, high hydrogen evolution potential and abundant natural reserves. However, the growth of anode dendrite and the attenuation of cathode capacity limit the application of zinc ion battery. Here, we propose that ZIF-8 can be used as an electrolyte additive for AZIBs to promote dendrite-free zinc anodic plating/stripping process. The results show that under the action of uniform ionic flux of ZIF-8, the zinc anode achieves a lifetime of more than 550 h, and significantly inhibits the occurrence of positive side reactions (106.1 mAh g −1 after 500 cycles at a current density of 1 A g −1 ). Density functional theory was used to systematically calculate the binding energy of Zn 2+ to different pore sizes of ZIF-8 and the results reveal that the adsorption capacity of ZIF-8 can control the migration of Zn 2+ . This work expands the application of MOFs in AZIBs and opens up a new door for future research about AZIBs based on MOFs.
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高影响因子
ChemCatChem
·
2022
·Vol. 15
·期 1
·e202201234
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IF 5.497
Lu Lin,Guikai Zhang,Liqun Kang,Tao Yu,Yang Su,Guang Zeng,Shengqi Chu,Wenhao Luo
Graphical Methane oxidation : Highly dispersed mononuclear Fe species encapsulated by ZIF-8 (Fe-ZIF-8) afford an optimal turnover rate of ∼45 mol C1 mol Fe −1 h −1 and a formic acid selectivity of ∼97 % in the direct methane oxidation at 323 K. The direct catalytic oxidation of methane into C1 oxygenates is a promising approach for methane valorization. However, the difficulties in CH 4 activation and inhibition of over-oxidation hinder the development of efficient catalysts for this transformation. Herein, highly dispersed Fe species confined by ZIF-8 are developed for the direct transformation of methane into value-added C1 oxygenates with H 2 O 2 as oxidant at 323 K. The as-obtained Fe-ZIF-8 can afford an optimal turnover rate (TOR) of ∼45 mol C1 mol Fe −1 h −1 . Note that the selectivity to HCOOH is ∼97 %, outstanding among the reported Fe-based heterogeneous catalysts. Combined analysis of X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy and 57 Fe Mössbauer spectroscopy suggests that the catalytically active sites in Fe-ZIF-8 are mononuclear six-coordinated Fe 3+ species. The confinement of mononuclear Fe species within a porous metal-organic framework material can provide an exquisite, enzyme-like performance for highly selective oxidation of methane towards formic acid under mild conditions.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Rui Ding,Qiuchen Wang,Xuehua Ruan,Yan Dai,Xiangcun Li,Wenji Zheng,Gaohong He
1D nanotube (HNT) based MMM presents high CO 2 permeation due to its long and hollow structure. However, the improvement of selectivity is still challenging. In this study, small PEI molecules with abundant amino groups were introduced into the nanocages of ZIF-8 HNTs to construct facilitated CO 2 transmission channel with low resistance. In the PEI@ZIF-8 HNTs, the –NH 2 groups can facilitate CO 2 transport in presence of H 2 O, resulting in an improvement in both CO 2 permeability and selectivity. Second, the introduction of PEI into the nanocages of ZIF-8 can adjust the effective sieving size to enhance CO 2 selectivity. Third, the hydrogen bond between PEI and Pebax can strengthen the interfacial compatibility, further improving CO 2 /N 2 selectivity of the MMMs. Finally, the 1D hollow structure of PEI@ZIF-8 HNTs provides CO 2 molecules with low-resistance and fast transport channel, enhancing the CO 2 permeability. Consequently, both the high CO 2 permeability and the high CO 2 /N 2 selectivity are acquired by the versatile filler of PEI@ZIF-8 HNTs. PEI@ZIF-8 HNTs based MMM at filler loading of 7 wt% under dry mixed gas, presents CO 2 permeability of 177 Barrer and CO 2 /N 2 selectivity of 72, which are 40% and 10.8% higher than those of ZIF-8 HNTs based MMM, respectively. Moreover, the permeability of CO 2 and the selectivity of CO 2 /N 2 reach 306 Barrer and 79 respectively under the wet mixed gas, which is far beyond the Robeson upper bound in 2008 and exceeds the McKeown upper bound in 2019. The proposed PEI@ZIF-8 HNTs are believed to be promising filler for MMMs based CO 2 capture.
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高影响因子
PEST MANAGEMENT SCIENCE
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2022
·Vol. 78
·期 5
·1953-1962
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IF 4.462
Jiyuan Liu,Tong Zhou,Ruichi Li,Zhen Tian
BACKGROUND Insect pheromone synergists have been widely used to produce potent pheromone products for environment-friendly pest control. Codlemone (Cod) and ( Z )-8-dodecenol (Dod) are two major Grapholita molesta pheromone synergists, with Cod having greater synergism and affinity for G. molesta pheromone binding protein 2 (GmolPBP2). Uncovering structural information key to the different binding affinity of Cod and Dod to GmolPBP2 would gain insights into what causes their synergy activity discrepancy. RESULTS Binding modes of the two synergists in the binding pocket of GmolPBP2 were analyzed and compared by molecular dynamics-based approaches. Although Cod and Dod were stabilized in a similar hydrophobic pocket, their interaction details with GmolPBP2 were divergent due to the extra double bond (C10═C11) in Cod. The C10═C11 improved the hydrophobic interactions of Cod with around residues. Such hydrophobic interaction improvement was also reflected in the raised importance of Phe11 in the GmolPBP2-Cod interaction. Not only that, the increased hydrophobic forces introduced by the C10═C11 changed the CH2–OH orientation in the GmolPBP2-Cod complex, which improved the H-bond interaction. Electrostatic complementarity analysis further indicated the positive role of C10═C11 in optimizing GmolPBP2-Cod interaction. CONCLUSION The C10═C11 is thought to contribute greatly to Cod's stronger synergy as a group key to the higher GmolPBP2-affinity, based on which the improvement directions for Cod and Dod were addressed as well. Our findings will aid in the development and optimization of more effective pheromone synergists, resulting in more effective pheromone-based pest management.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Zhiqiang Guo,Hongli Wang,Liang Wang,Bin Zhao,Yiran Qian,Hongwei Zhang
Pharmaceuticals and personal care products (PPCPs) are universally detected in natural waters, posing potential risks to drinking water safety. Nanofiltration (NF) is an advanced technology for water purification; however, its removals of PPCPs are unsatisfying, especially for hydrophobic species. In this study, the 3D architecture of nanomaterials were used to manipulate the performance the polyamide (PA) thin-film nanocomposite (TFN) membrane. In-situ addition of polyethyleneimine (PEI) successfully induced the assembly of ZIF-8 nanocrystals into star-shaped clusters (ZIF-8-PEI) due to the coordination between PEI and Zn 2+ . Together with the improved hydrophilicity, these ZIF-8-PEI clusters became excellent scaffolds for water drop retention after discretely loading onto the porous substrate. The conical protrusions of the ZIF-8-PEI clusters supported the defect-free PA film produced by the interfacial polymerization (IP), leaving big interfacial cavities underneath. These cavities worked as gutters for water transport, and the water permeance of the optimal TFN was 79% higher than that of the pristine thin-film composite (TFC) membrane. Moreover, the water impregnated cavities markedly alleviated the hydrophobic interaction between the PA film and hydrophobic PPCPs, impeding the transport of PPCPs across the membrane. Our results demonstrated the importance of the 3D architecture of nanofillers for the improving membrane performance.
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高影响因子
COMPOSITES COMMUNICATIONS
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2022
·
IF 7.685
Meng Liu,Zhaozhu Zhang,Yanling Wang,Peilong Li,Mingming Yang,Junya Yuan
Herein, TiN@ZIF-8 hybrid with hierarchical structure was constructed by in situ growth of Zeolitic Imidazolate Frameworks-8 (ZIF-8) onto the TiN surface via a PDA/PEI (polydopamine/polyethyleneimine) intermediate layer. The characterization of structure and chemical composition affirmed the successful assembly of TiN@ZIF-8 hybrid and the specific surface area of TiN@ZIF-8 hybrid showed a sharp increase from 3.5 m 2 /g for pristine TiN to 183.4 m 2 /g. The resulted TiN@ZIF-8 hybrid was aimed at strengthening the mechanical and tribological properties of fabric composites . The results demonstrated that the tensile strength of TiN@ZIF-8/fabric composites presented an increase by 48% due to the stress transfer and reinforcement of TiN@ZIF-8. Additionally, the incorporation of TiN@ZIF-8 restricted the moving of resin molecular chain and escape of decomposition products, contributing to the improvement in heat resistance of fabric composites. Friction and wear tests indicated that the abrasion resistance of TiN@ZIF-8/fabric composites was significantly improved in comparison with pristine composites because the ZIF-8 loaded on the surface of TiN made for a more even dispersion of TiN, and the introduction of TiN@ZIF-8 contributed to forming a uniform, dense transfer film due to the synergistic enhancement between TiN and ZIF-8.
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CHEMOSPHERE
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2022
·
IF 8.943
Long Zhou,Yunqiang Yi,Zhanqiang Fang
nZVI is considered to be a promising material for environmental remediation. However, the drawbacks of easy agglomeration and low activity severely limit its application. In this work, nZVI/ZIF-8 was obtained by in-situ reduction of nZVI in the presence of performed ZIF-8. The reactivity of the as-obtained nZVI/ZIF-8 nanocomposites was investigated by removing hexavalent chromium (Cr(VI)) from wastewater. The as-obtained nZVI/ZIF-8 nanocomposites showed a superior activity for Cr(VI) removal, with an optimum activity (91.27%) achieved over 0.25 nZVI/ZIF-8 (i e., the mass ratio of ZIF-8 to nZVI was 0.25), higher than that of nZVI (64.55%), and this could be owned to the excellent dispersion of nZVI in nZVI/ZIF-8 and the high specific surface area as compared with the bare nZVI. The results of XPS characterization, quenching experiment analysis and kinetics fitting indicated that the Cr(VI) elimination was a surface-dominated chemical reduction process. Besides, more than 99.00% Cd(II), Cu(II), Cr(VI) and Pb(II) was removed from wastewater over nZVI/ZIF-8 nanocomposites, and negligible zinc ion was detected in the aqueous solutions. The results of our finding demonstrate that the introduction of MOFs is an effective strategy in developing a highly efficient nZVI-based nanocomposites system, and also highlight the promising role of using nZVI/MOFs in heavy metal treatment for practical wastewater.
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PubMed
高影响因子
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