APL Materials
·
2024
·Vol. 12
·期 1
·
IF 5.3
Luan Pengyan,Yang Zhenxin,Liang Zheng,Li Xiaoliang,Chen Nan,Li Fushun,Li Xuanhe,Su Jiale,Lu Zheng-Hong,Zhu Qiang
Zeolitic imidazolate framework-8 (ZIF-8) is a versatile candidate for next-generation electronics owing to its adjustable lattice and physicochemical properties. However, the utilization of ZIF-8 for the fabrication of solid-state electronics and circuit components, such as field-effect transistors (FETs), has not been realized thus far, primarily due to ongoing debates surrounding its electrical properties. In this work, we fabricated n-type FETs using ZIF-8@ZnO nanorod arrays. A significant hysteresis behavior was observed. It was demonstrated that this hysteresis cannot be assigned to the well-established ferroelectric effect but rather to the polarization of ZIF-8, wherein the electric field of the gate aligns the dipole of 2-methylimidazole through molecular orientation rotation. It was clarified that the process of annealing in air can result in the chemisorption of oxygen on methylimidazole, leading to a limitation in the rotation of methylimidazole. This restriction ultimately causes the depolarization of ZIF-8, resulting in the erasure of hysteresis. This study unfolds the tunable hysteresis behavior of ZIF-8 and its sensibility to oxygen, thereby highlighting the potential applications of ZIF-8 in FETs, nonvolatile memories, and gas sensors.
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DOI
高影响因子
HYDROMETALLURGY
·
2018
·
IF 3.3
Zhike Wang,Boshuang Zhang,Cunling Ye,Lingyun Chen
Metal organic frameworks (MOFs) have diverse applications in adsorption/separation fields. However, little is known about MOFs as adsorbents for the adsorption of Au(III) from aqueous solutions. In this work, a highly porous MOFs, ZIF-8, was modified by thiourea (TU) via coordination-based post-synthetic modification strategy. Compared with pristine ZIF-8, the TU functionalized ZIF-8, TU*ZIF-8, exhibited a remarkable Au(III) adsorption ability with a saturation adsorption capacity of 4262.8 mg/g although its surface area and pore volume decreased with TU loading. Interestingly, the adsorption efficiency of Au(III) was >99% with a broad Au(III) concentration range of 50–400 mg/L using only 20 mg TU*ZIF-8. Meanwhile, TU*ZIF-8 showed an encouraging selectivity for Au(III) in the presence of some metal ions such as Cu(II), Cr(VI), Pb(II), Cd(II), Mn(II), Mg(II), and Co(II). The improved adsorption of Au(III) on TU*ZIF-8 is explained by the synergistic effect of electrostatic interaction and coordination interaction. Particularly, the coordination interaction between Au(III) and TU of TU*ZIF-8 plays a major role in the Au(III) adsorption process of TU*ZIF-8. This work suggests a potential application of functionalized MOFs for the efficient recovery of gold from aqueous solutions.
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Yanying He,Qizi Fu,Xiaopei Li,Linmiao Yin,Dongbo Wang,Yiwen Liu
Photocatalysis has been considered a promising method for environmental purification. However, powder nanomaterials are not suitable for large-scale application due to the limit of low recyclability and energy-intensive operation. Integrating and depositing powder photocatalysts on monolithic substrates may solve these issues. In this study, a ZIF-8 photocatalyst membrane and its derived product (ZnS photocatalyst membrane) was constructed by a facile in-situ treatment of cellulose-based substrate (take filter paper as an example). Both the two nanomaterials were confirmed to be tightly anchored to filter paper with the aid of chemical interaction. Under visible light irradiation, excellent dynamic-flow photocatalytic removal efficiencies of methylene blue (MB) degradation (97% within 80 min, k = 0.042 ± 0.002 min −1 ) and Cr(VI) reduction (100% within 60 min, k = 0.116 ± 0.007 min −1 ) were achieved by the prepared ZIF-8 photocatalyst membrane and its derived ZnS photocatalyst, respectively. Considering the high MB adsorption capacity and facile regeneration process of ZIF-8 photocatalyst membrane, the adsorption-degradation strategy was promising for its universal applications. The MB degradation pathway and photocatalytic mechanisms were also explored. Ultimately, a comprehensive discussion on the advantages and implications of prepared photocatalyst membranes for photocatalytic water treatment was rationally proposed. This study provided a promising method for water decontamination and demonstrated the significant superiority of monolithic membrane for photocatalytic water treatment.
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DOI
高影响因子
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
·
2024
·
IF 2.5
Lin Zhan,Xuelian Yin,Li Qiu,Chenchen Li,Yanli Wang
The nanomedicine system based on dual drug delivery systems (DDDs) can significantly enhance the efficacy of tumor treatment. Herein, a metal-organic framework, Zeolite imidazole salt frames 8 (ZIF-8), was successfully utilized as a carrier to load the dual chemotherapeutic drugs doxorubicin (DOX) and camptothecin (CPT), named DOX/CPT@ZIF-8 (denoted as DCZ), and their inhibitory effects on 4T1 breast cancer cells were evaluated. The study experimentally demonstrated the synergistic effects of the dual chemotherapeutic drugs within the ZIF-8 carrier and showed that the ZIF-8 nano-carrier loaded with the dual drugs exhibited stronger cytotoxicity and inhibitory effects on 4T1 breast cancer cells compared to single-drug treatment. The use of a ZIF-8-based dual chemotherapeutic drug carrier system highlighted its potential advantages in suppressing 4T1 breast cancer cells.
研究领域:
纳米医学
·
肿瘤学
·
药物递送
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2019
·
IF 3.372
Donghui Liu,Long Xiang,Hao Chang,Ke Chen,Chongqing Wang,Yichang Pan,Yanshuo Li,Zhongyi Jiang
Mixed matrix membranes (MMMs) have attracted tremendous attention in the field of gas separation, which adopts the synergistic advantages of the polymer and inorganic phase. However, the MMMs rarely generate sufficient selectivity for energy-efficient gas separation, even if the dispersed molecular sieve is highly selective. Here, an unprecedented improvement (∼4.5-fold) of both C 3 H 6 /C 3 H 8 permeability and selectivity on the crosslinked poly(ethylene oxide) (XLPEO) membranes containing ZIF-8 nanocrystals. When the ratio of polymer-to-sieve permeability ( R c/d ) is in the range of 0.004–0.36, both C 3 H 6 /C 3 H 8 permeability and selectivity increases with the ZIF-8 loading, and the separation performance on MMMs can approach and surpass the-state-of-the-art polymer upper bound. Besides C 3 H 6 /C 3 H 8 separation, the universality of this proposed polymer-sieve matching law is suitable for other gas-pairs on MOF-based MMMs.
研究领域:
材料科学
·
化学工程
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DOI
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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产品关联
DOI
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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产品关联
DOI
高影响因子
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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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Yang Li,Xu Zhang,Asan Yang,Chunyue Jiang,Guoliang Zhang,Jingwen Mao,Qin Meng
Multi-layer graphene oxide (GO) membranes show great perspective in vast fields due to special two-dimensional structure. However, pure GO membranes generally face main obstacles of low flux, weak interlayer interaction and poor stability, which hinder their wide application in separation. Introduction of nano-porous crystals into interlayer of GO nanosheets to form 3D/2D structure is a potential strategy to overcome these issues. In this study, novel polyphenol etched hollow MOF/GO composite membrane was first synthesized employing modified hollow metal organic frameworks with strong hydrophilicity and hollow structure by one-step etching-aided cross-linking method. MOF nanoparticles with hollow structure expanded interlayer spacing of GO nanosheets and brought about formation of additional water channels, significantly reducing water transfer resistance. Meanwhile, nano-porous crystal MOFs modified by phenolic materials were able to cross-link adjacent GO nanosheets via π–π interfacial interactions to achieve stable structure and increase anti-swelling property of membranes. The pores with abundant hydroxyl groups provided strong free energy barrier for ions at medium and low concentrations of ionic strength , therefore not only greatly improved membrane permeaselectivity, but also enhanced anti-fouling performance. The prepared eZIF-8/GO nanofiltration membrane exhibited excellent permeate flux of 16.4 L m −2 h −1 bar −1 , 382% higher than pure GO membrane, and competitive Na 2 SO 4 rejection of 86.3%. By simply adjusting GO loading to further reduce membrane thickness, the permeate flux reached up to 45.4 L m −2 h −1 bar −1 with high rejection more than 99% for organic molecules. These results indicate that novel MOF/GO composite membranes have broad application prospects in desalination and water treatment.
研究领域:
材料科学
·
环境工程
·
膜分离技术
·
纳米材料
·
水处理
·
界面化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Rongrong Si,Honggang Luo,Tao Zhang,Junwen Pu
Ultralight aerogels with low bulk density, highly porous nature, and functional performance have received significant focus in the field of water pollution treatment. Here, high-crystallinity, large surface-aera metal frame-work (ZIF-8) was efficiently utilized to assist in the preparation of ultralight yet highly oil and organic solvent adsorption capacity, double-network cellulose nanofibers/chitosan-based aerogels through a physical entanglement and scalable freeze-drying approach. After chemical vapor deposition with methyltrimethoxysilane, a hydrophobic surface was obtained with a water contact angle of 132.6°. The synthetic ultralight aerogel had low density (15.87 mg/cm 3 ) and high porosity (99.01 %). Moreover, the aerogel had a three-dimensional porous structure, which endowed it with high adsorption capacity (35.99 to 74.55 g/g) for organic solvent, and outstanding cyclic stability (>88 % of the adsorption capacity after 20 cycles). At the same time, aerogel removes oil from various oil/water mixtures by gravity alone and has excellent separation performance. This work holding excellent properties in terms of convenient, low-cost, scalability to manufacture environmentally friendly biomass-based materials for oily water pollution treatment.
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DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Peng Zhang,Junyou Chen,Lingfei Feng,Mingchi Jiang,Bin Xu
Silicon (Si) shows great potential for lithium-ion batteries (LIBs) due to its high theoretical capacity and low working potential. However, its intrinsic low electronic conductivity and large volume expansion during lithiation result in dramatic capacity fading and poor rate capability. Herein, a dual-confinement strategy is proposed for improving the lithium storage properties of Si by uniformly anchoring Si nanoparticles within a MXene/ZIF-8 derived carbon framework. In the Si/MXene@C composite, Si nanoparticles tightly bond with MXene and carbon through the formed interfacial Si–O–Ti and Si–C bonds, respectively, which is beneficial for alleviating the volume expansion of Si and promoting the interfacial charge transfer. Therefore, the Si/MXene@C composite exhibits excellent lithium storage performances in terms of high capacity (1006.1 mAh g–1 at 100 mA g–1), stable cycle performance (862.9 mAh g–1 after 150 cycles at 100 mA g–1), and superior rate capability (233.3 mAh g–1 at 5 A g–1), indicating its promising potential as an anode material for next-generation high-performance LIBs.
研究领域:
材料科学
·
储能
·
电化学
·
纳米复合材料
·
锂离子电池
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DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2013
·Vol. 19
·期 40
·13484-13491
·
IF 5.831
Yan-Yan Fu,Cheng-Xiong Yang,Xiu-Ping Yan
The unique features of high porosity, shape selectivity, and multiple active sites make metal–organic frameworks (MOFs) promising as novel stationary phases for high-performance liquid chromatography (HPLC). However, the wide particle size distribution and irregular shape of conventional MOFs lead to lower column efficiency of such MOF-packed columns. Herein, the fabrication of monodisperse MOF@SiO 2 core–shell microspheres as the stationary phase for HPLC to overcome the above-mentioned problems is reported. Zeolitic imidazolate framework 8 (ZIF-8) was used as an example of MOFs due to its permanent porosity, uniform pore size, and exceptional chemical stability. Unique carboxyl-modified silica spheres were used as the support to grow the ZIF-8 shell. The fabricated monodisperse ZIF-8@SiO 2 packed columns (5 cm long × 4.6 mm i.d.) show high column efficiency (23 000 plates m −1 for bisphenol A) for the HPLC separation of endocrine-disrupting chemicals (bisphenol A, β-estradiol, and p -( tert -octyl)phenol) and pesticides (thiamethoxam, hexaflumuron, chlorantraniliprole, and pymetrozine) within 7 min with good relative standard deviations for 11 replicate separations of the analytes (0.01–0.39, 0.65–1.7, 0.70–1.3, and 0.17–0.91 % for retention time, peak area, peak height, and half peak width, respectively). The ZIF-8@SiO 2 microspheres combine the advantages of the good column packing properties of the uniform monodisperse silica microspheres and the separation ability of the ZIF-8 crystals. Graphical Core strength : Monodisperse ZIF-8@SiO 2 (ZIF-8=zeolitic imidazolate framework 8) core–shell microspheres have been fabricated through controllable growth of a ZIF-8 shell on spherical carboxylate-terminated SiO 2 cores (see figure). The metal–organic framework material is suitable as a stationary phase for fast and highly efficient HPLC separation.
研究领域:
分析化学
·
材料科学
·
色谱学
·
金属有机框架材料（MOFs）
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DOI
高影响因子
危险品化学品经营许可证（带存储）