SEPARATION AND PURIFICATION TECHNOLOGY
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2018
·
IF 3.927
Xuehua Ruan,Xinfang Zhang,Ziyuan Zhou,Xiaobin Jiang,Yan Dai,Xiaoming Yan,Gaohong He
Continuous ZIF-8 membranes have showed great potential for gas separation. The prospect is subjected to two pivotal issues: shorten the time to construct the ZIF-8 selective layer and tightly bond ZIF-8 layer onto the substrate. In our previous work, Zn(II)-doped polydopamine (Zn-PDA) linkage layer was proposed and effectual to solve these problems. In this research, the mechanism likely to support the improvements is studied intensively. The dominant factor is that Zn(II) ions can be chelating and depositing sufficiently in the linkage layer. The strongly alkaline condition for dopamine polymerization is also beneficial to Zn(II) chelation and deposition, which has been confirmed by DFT simulation, together with characterization tests, e.g., XPS, FTIR, and Zn(OH) 2 precipitation for Zn(II)–O coordination. Phenolic hydroxyl groups are deprotonated in the strongly alkaline environment with high Mulliken charge (−0.515 & −0.524 e) and become strong chelation sites to Zn(II). Subsequently, Zn(II) clusters extensively filled in the PDA linkage layer are acting as the starting sites for ZIF-8 heterogeneous nucleation and growth. The correspondence between Zn(II) clusters probed by EDX and nascent ZIF-8 crystals visualized by FE-SEM can support this phenomenon clearly. On the whole, the abundant starting sites in Zn-PDA enhanced ZIF-8 growth, and ZIF-8 growth from the rooting-in Zn(II) clusters created an indented and hinged boundary for tightly bonding ZIF-8 layer onto the substrate.
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ACTA PHYSICO-CHIMICA SINICA
·
2016
·Vol. 32
·期 9
·2377-2382
·
IF 0.844
XU Li-Hong,ZHAO Dong-Yu,LI Yang,GUO Lin
ZIF-8 (zeolitic imidazolate framework-8), a kind of metal-organic framework material, is one of the most important energy materials and widely used in various fields because of its high specific surface area and excellent thermal stability. In this research, we synthesized ZIF-8 by
the traditional hydrothermal synthesis method in a purely methanol system. The obtained particles were ~250 nm in diameter with a rhombic dodecahedron morphology. Moreover, the prepared ZIF-8 materials exhibited good thermal stability and a large surface area. We also found that the rhombic
dodecahedral ZIF-8 enhanced the electro-optical (E-O) properties of nematic liquid crystal (N-LC) depending on the ZIF-8 doping concentrations. ZIF-8 in N-LC cells adsorbs ionic impurities and suppresses the screen effect, leading to a lower driving voltage and faster response time. At a ZIF-8
doping concentration of 0.05%(w, mass fraction), the N-LC cells showed the best E-O properties, including the lowest threshold voltage (V
th) of 0.92 V, the lowest saturation voltage (V
sat) of 1.31 V, and a short response time of 10.04 ms. However, above
a doping concentration of 0.05%(w) ZIF-8 aggregated in N-LC cells, affecting the arrangement of the LC molecules and trapping less impurity ions, which deteriorated the E-O properties of N-LC.
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ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Jing Lin,Lianshan Sun,Zhanyi Cao,Dongming Yin,Fei Liang,Yaoming Wu,Limin Wang
We describe our recent progress on a novel method to prepare Ti 1.4 V 0.6 Ni hydrogen storage alloy covered with nanostructured Co 3 O 4 by utilizing zelolitic imidazolate framework 67 (ZIF-67) as the template. Ti 1.4 V 0.6 Ni@C@Co 3 O 4 composite is prepared through a dopamine self-polymerization and a facile precipitation reaction with the subsequent thermal treatment. This specific composite structure combines the high conductivity of carbon together with the promising catalytic property of nanostructured Co 3 O 4 , therefore the enhanced electrochemical activity and stability are realized. As a result, Ti 1.4 V 0.6 Ni@C@Co 3 O 4 composite electrode possesses a capacity conservation rate of 56.1% after 300 charging/discharging cycles, remarkably larger than that of Ti 1.4 V 0.6 Ni (25.3%). Moreover, a study of the kinetics demonstrates that nanostructured Co 3 O 4 coating accelerates the charge-transfer reaction of the electrode. These results prove that coating with carbon and nanostructured Co 3 O 4 is a potential method for enhancing electrochemical hydrogen storage properties of hydrogen storage alloys.
研究领域:
材料科学
·
电化学
·
能源存储
·
金属氢化物电池
·
纳米材料
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Jianfeng Hu,Huiya Cheng
A challenge in metal protection is developing anti-corrosion materials that possess both high adsorption capacity and intelligent responsiveness. To overcome the limitations of traditional corrosion inhibitors, a novel pH-responsive corrosion inhibitor (PDT@ZIF-90) was developed through a multi-step strategy. Specifically, the catechol-modified polymer–TiO2 hybrid (PDT) was synthesized through Schiff base reactions, which demonstrated dense adsorption on Q235 carbon steel through Fe–N/O coordination. Subsequent ZIF-90-mediated in situ encapsulation enabled precise payload integration of the PDT corrosion inhibitor. UV-vis characterization confirmed that the PDT@ZIF-90 composite system enables pH-triggered intelligent release of the active corrosion inhibitor component under acidic conditions (pH < 6). Electrochemical tests revealed a 95.2% inhibition efficiency for 200 ppm PDT@ZIF-90 in 3.5 wt% NaCl. This dual-functional strategy offers a scalable paradigm for self-adaptive anticorrosion materials suitable for Q235 carbon steel in marine and energy infrastructure applications.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 30
·1-13
·
IF 2.8
Huang Yi-Rui,Li Wei,Wang Ze-Hong,Jian Xiao-Jian,Zhou Zi-Zhe,Jia Xiang-Xiang,Liu Hong-Yu,Lu Yi-Fan,Wang Jun-Chuan,Wu Xiang-Feng,Wang Hui,Zhou Er-Peng
Chiral optoelectronic sensors detect chirality by selectively binding with chiral substrates, causing changes in electrical signals, which have attracted wide attention for their chiral recognition ability. In this study, the Ti 3 C 2 /ZIF-67/D-His electrochemical sensors were successfully synthesized. Firstly, ZIF-67/D-His was obtained using hexahydrated cobalt nitrate, dimethylimidazole, and D-histidine (D-His). Then, the ZIF-67/D-His film was grown on the surface of the Ti 3 C 2 film using a spin-coating method. By changing the spin-coating cycles, the influence of the ZIF-67/D-His film thickness on the detection performance was studied. The results showed that when the spin-coating cycle was three, the electrochemical sensor (Ti 3 C 2 /ZIF-67/D-His-3) exhibited good detection performance for D-Ala with a detection limit of 1.1 μM, and additionally demonstrated an excellent selective detection ability for D-Ala, with a significant difference in the differential pulse voltammetry (DPV) current intensity between D-Ala and L-Ala solutions. Besides, the detection curve for D-Ala showed a linear relationship with the concentration of the D-Ala solution. Furthermore, the Ti 3 C 2 /ZIF-67/D-His-3 electrochemical sensor demonstrated good stability and could be reused multiple times after simple cleaning. The Ti 3 C 2 /ZIF-67/D-His prepared in this work shows promising application potential in the area of electrochemical sensors.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhihui Xu,Jing Li,Xiaoling Peng,Shan Tao,Jingcai Xu,Bo Hong,Xinqing Wang
Developing high-performance microwave absorbers with strong absorption, broad bandwidth, and small thickness remains challenging. Herein, we report a novel strategy for constructing hierarchical LaFeO₃/Co/C composites by in-situ growing ZIF-67 on biomimetic corncob-like LaFeO₃ (LFO) followed by pyrolysis. The hollow architecture of LFO, featuring vertically aligned nanosheet arrays, provides abundant nucleation sites and facilitates multiple reflections and scattering of incident microwave. The synergistic effect between the dielectric LFO and magnetic Co/C significantly improved the impedance matching and attenuation. The optimized composite exhibited exceptional minimum reflection loss (RL min ) of -54.9 dB at 1.5 mm and a broad effective absorption bandwidth of 5.44 GHz at 1.7 mm (almost covering the entire Ku-band). The performance is attributed to the enhanced impedance matching, synergistic dielectric-magnetic loss, and intensive interfacial polarization. This work provides a valuable insight for designing high-efficiency EMW absorbers through morphological and compositional regulation.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Le Yin,Mu Hu,Yajie Liu,Yiyi Lin,Yuan Wang,Shaojun Yuan
The development of intelligent, environmentally responsive oil–water separation membranes with reversible wettability presents a promising strategy for controllable emulsion separation and the advanced treatment of complex oily wastewater. Wastewater. In this study, a novel thermally responsive membrane with switchable wettability between superhydrophilic and superhydrophobic states was fabricated via in situ growth of bimetallic metal–organic frameworks (CoZn-ZIF) on electrospun poly(vinylidene fluoride)/poly(N-isopropylacrylamide) (PVDF/PNIPAM) nanofiber membranes. The resulting PVDF/PNIPAM@CoZn-ZIF membrane leverages the thermally induced reversible conformational transition of PNIPAM to exhibit underwater superoleophobicity below its lower critical solution temperature (LCST) and under-oil superhydrophobicity above LCST. This switchable wettability enabled efficient on-demand separation of both oil-in-water (O/W) and water-in-oil (W/O) emulsions, achieving water permeation fluxes exceeding 1900 L·m–2·h–1 and oil permeation fluxes over 1150 L·m–2·h–1, with separation efficiencies above 99.00% and 99.60%, respectively. Moreover, the embedded Co1Zn3-ZIF served as a catalyst to activate peroxymonosulfate (PMS), generating reactive oxygen species (·OH and·SO4–) and enabling rapid degradation of methylene blue, with a removal efficiency of 99.92% within 15 min. This study presents a multifunctional composite membrane as an intelligent, efficient platform for integrated oil–water emulsion separation and organic pollutant remediation.
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PubMed
高影响因子
Foods
·
2026
·Vol. 15
·期 2
·374
·
IF 5.1
Ziling Teng,Zixuan Ge,Xia Yu,Chunxia Zhou,Suling Guo,Yun Sun,Zhong Yao
An organophilic composite membrane, ZIF-67@PDMS, was fabricated to enhance the isolation of natural aromatic compounds. The as-prepared composite membrane was characterized using SEM, EDS, FTIR, XRD, and contact angle measurement. In comparison to pure PDMS, ZIF-67@PDMS, featuring a loading capacity of 2.5 wt% of PDMS and a membrane thickness of 15 μm, demonstrated markedly improved separation performance for the characteristic aroma compounds of strawberries, namely linalool, benzaldehyde, and ethyl acetate. Under optimal conditions, the permeation fluxes of the three compounds were 628.02 mg∙m−2∙h−1, 294.82 mg∙m−2∙h−1, and 254.14 mg∙m−2∙h−1, along with separation factors of 26.48, 7.94, and 6.32, respectively. ZIF-67@PDMS was then employed to isolate aromatic compounds from freshly squeezed strawberry juice. By backfilling the permeate, both the variety and the content of aromatic compounds in strawberry concentrate were notably restored, and its aroma profile also closely resembled that of fresh strawberry juice.
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高影响因子
Applied Catalysis O: Open
·
2026
·
IF 0
Jingyi Hao,Binchuan Li,Jing Dai,Yongfeng Chang,Jianshe Chen,Daxue Fu,Na Xu,Qing Han
The Bayer process is the primary method for alumina production. However, thiosulfate ions (S 2 O 3 2− ) present in the involved sodium aluminate solution are difficult to remove and adversely affect this process, thereby limiting the large-scale application of high‑sulfur bauxite. To address this issue, this study designed and synthesized a composite photocatalyst Co-TiO 2 @C based on ZIF-8-derived porous carbon as a carrier. Moreover, the study combined wet oxidation and photocatalytic oxidation to investigate the photocatalytic S 2 O 3 2− degradation activity and stability of this photocatalyst in a sodium aluminate solution. Results indicated that the ZIF-8-derived porous carbon carrier had a high specific surface area and highly porous structure, which were conducive to the loading and dispersion of Co-TiO 2 catalytic components. Moreover, it formed a composite photocatalytic material with good adsorption performance and abundant active sites. High-temperature pyrolysis led to the formation of graphite structures with excellent electron transfer properties on porous carbon supports, while Co doping reduced the bandgap energy of the loaded nano-TiO 2 , resulting in excellent photocatalytic performance of the composite catalyst under visible-light irradiation (The bandgap is 2.78 eV, and the photocurrent density under xenon lamp can reach 2.41 μA/cm 2 ). The adsorption degradation of S 2 O 3 2− ions by Co-TiO 2 @C/900 reached 29.6% within 30 min. After 60 min of light irradiation, the photocatalytic degradation rate of S 2 O 3 2− ions by Co-TiO 2 @C/900 can reach 92.5% under xenon lamp irradiation, which is 38.4% higher than that of P25. Moreover, the degradation efficiency of S 2 O 3 2− ions by Co-TiO 2 @C/900 only decreased by 9.5% after 6 cycles of experiences. The results of quenching experiments and paramagnetic electron resonance indicated that the degradation mechanism of S 2 O 3 2− depended on the generation of reactive oxygen species, such as hydroxyl radicals and superoxide radicals, under light irradiation.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Man Zhang,Jialong Liu,Xingyu Liu,Junliang Liu,Shuwei Zhang,Xiaoli Song
Zeolitic Imidazolate Framework-67 (ZIF-67) has garnered significant attention in photocatalysis due to its remarkable visible-light responsiveness. However, its practical application is often hindered by the rapid recombination of electron-hole pairs. In this study, ZIF-67 was modified using selected conjugated organic molecules with distinct skeletal structures and functional groups, including 1,3,6,8-tetra(4-carboxylphenyl)pyrene, 3,3′-diaminobenzidine and benzimidazole, through a simple one-step solvothermal process and three nanocomposites (ZIF-67@BA, ZIF-67@Pyrene and ZIF-67@BIM) were developed. The results demonstrated that all three composites exhibited enhanced electron-hole separation efficiency, reduced bandgap energy, and superior visible-light response characteristics compared to pristine ZIF-67. These conjugated molecules effectively modulated the photocatalytic performance of ZIF-67, with BA demonstrating the most pronounced enhancement owing to its well-defined symmetrical configuration, exceptional conjugation effect, and functional groups. The optimized ZIF-67@BA composite achieved 89.2 % total removal of tetracycline hydrochloride under visible light irradiation, including 35.5 % photocatalytic degradation efficiency, with even higher performance in practical water treatment. The composite also exhibited excellent reusability, stability, and adaptability. Trapping experiments revealed that •O 2 ⁻ and h⁺ served as the primary active species. This study provides an effective strategy for developing ZIF-67-based nanocatalysts while offering new insights for designing other MOF-based photocatalysts with promising potential for organic pollutant removal.
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JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 9
Peng Li,De Ao,Zhenjie Gu,Zhihua Qiao,Chongli Zhong
Metal-organic framework (MOF)-based membranes show promising potential for gas separation. However, it remains challenging to fully exploit the synergistic advantages of MOF crystals and polymers for fabricating highly loaded mixed matrix membranes (MMMs). Herein, a highly loaded ZIF-8 ultrathin MMM was prepared in situ via a stepwise growth strategy. Driven by the diffusion rate difference between the ligand and polyethyleneimine (PEI-600), preferentially formed ZIF-8 crystals served as the dominant phase, while the subsequently developed PEI-Zn 2+ crosslinked network acted as an intergranular densification phase. Owing to the reduction in ZIF-8 crystal size induced by PEI, the MMMs exhibited an ultrathin thickness of only 160 nm. Furthermore, PEI enhanced the molecular sieving ability of crystals and membrane's CO 2 /N 2 solubility selectivity by regulating the pore structure and membrane composition. With a high ZIF-8 loading of 84.3 %, the resulting MMMs demonstrated an excellent CO 2 permeance of 3177.4 GPU, accompanied by a CO 2 /N 2 selectivity of 36.9. Notably, it maintained stable separation performance after bending and during long-term operation, showing good processability and industrial application potential. This strategy not only reinforces the advantages of MOF-based gas separation membranes but also provides a new paradigm for fabricating highly loaded MMMs.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Qinghao He,Mingxin He,Hao Zhang,Pan Xu,Xiantao Lin,Jianbo Zhang,Ding Luo,Jinghua Li
In nanomaterials containing multiple metal atoms, interactions between metal atoms can generate the Fenton effect, making them a novel antibacterial agent that combines photodynamic and chemodynamic properties. However, conventional single-atom or multi-atom nanomaterials are limited by their specific surface area and porosity, resulting in relatively low photocatalytic efficiency. Herein, we developed a nanzyme antibacterial agent based on a porous ZIF-8 metal-organic framework incorporated with Pt and CuS via a straightforward method. Under low-concentration near-infrared (NIR) light irradiation, the CuS enables the nanzyme to rapidly raise the reaction system temperature to about 50 °C within 5 min. Furthermore, facilitated by charge transfer between Cu and Pt metals and the prominent Fenton-like activity of Pt, the system efficiently catalyzes hydroxyl radical generation from trace amounts of H 2 O 2. This mechanism synergistically integrates photodynamic and chemodynamic actions for antibacterial efficacy. The designed CuS@Pt@ZIF-8 nanzyme achieves a bacterial elimination rate of over 95% against common bacteria when subjected to irradiation with 808 nm NIR light. In vivo experiments in mice demonstrated a wound healing rate of up to 98% within 7 days. Additionally, experiments on plants and animals demonstrated that this nanzyme has minimal toxicity. The broad-spectrum Fenton-like catalytic system provide an efficient strategy for drug-resistant bacterial wound infections under combined photodynamic and chemical dynamics therapy, offering a new avenue for the development of clinical drugs.
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