CARBON
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2021
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IF 9.594
Yuchen Xiao,Huajun Yang,Xianhui Bu,Pingyun Feng
We report a family of carbon materials (denoted SFZ8C) prepared from templated carbonization of zeolitic imidazolate framework-8 (ZIF-8) in NaCl–ZnCl 2 eutectic salt. The hard-templating effect of the salt is utilized to sustain the framework and maximize the porosity during carbonization. In addition to rich surface nitrogen and oxygen species, SFZ8Cs have large specific surface area. These combined features give rise to excellent adsorption properties for light hydrocarbon gases. SFZ8Cs have both C 2 H 2 /CO 2 selective and C 3 /C 2 selective adsorption, as well as the ability to selectively remove impurities from methane. Particularly noteworthy is the excellent C 3 /C 2 selective adsorption performance by SFZ8C-900. Its propane/ethane selectivity (7.68) is on par with the best value (7.72) reported so far, yet SFZ8C-900 excels in propane uptake capacity. The multifunctional properties together with the ease for the mass production make SFZ8Cs promising for a number of important applications.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Duoyong Zhang,Chen Zhang,Xinqi Zhang,Yongqiang Tian,Xusheng Cheng,Xuancan Zhu,Liwei Wang
To enhance CO 2 sorption efficiency under low-pressure conditions and effectively compete with N 2 sorption in flue gas, modifications are implemented aimed at improving the adsorption capacity and selectivity of ZIF-8, renowned for their robust stability. Deep eutectic solvent (DES) comprising tetraethylammonium chloride (TEAC), tetrapropylammonium chloride (TPAC), and tetrabutylammonium bromide (TBAB) as hydrogen-bond acceptors, along with ethanolamine (MEA) as the hydrogen-bond donor, were meticulously prepared for this purpose. ZIF-8 underwent modification through DES loading, resulting in the distinctive emergence of a “core-membrane” structure. Characterization revealed that the DES effectively adhered to the surface of ZIF-8 in a membrane-like structure, without altering the chemical structure or pore size of ZIF-8. The most significant enhancement in sorption capacity was observed with TPAC&MEA modification. Considering the presence of N 2 partial pressure in the flue gas, at 0.05 and 1 bar, the CO 2 adsorption capacities reached 1.92 and 3.03 mmol g −1 , respectively, increasing 71.11 and 4.00 times compared to pristine ZIF-8. The ZIF-8 exhibited a CO 2 /N 2 separation coefficient of 72.77, which increased to a maximum of 997.50 after DES modification. Additionally, the modified material demonstrated exceptional cyclic and thermal stability during testing. This study significantly elevates the CO 2 adsorption capacity and selectivity of solid materials within the low-pressure range, providing pivotal support for CO 2 capture and decarbonization efforts.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Journal of Materials Chemistry B
·
2024
·Vol. 12
·期 14
·3481-3493
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IF 6.1
Ting Liu,Kangkang Huang,Yuxia Yang,Shengwu Wen,Jingxian Zhang,Suiping Deng,Shaozao Tan,Langhuan Huang
Bacterial infection is the most common risk factor that causes the failure of implantation surgery. Therefore, the development of biocompatible implants with excellent antibacterial properties is of utmost importance. In this study, NIR light-driven AgBiS2@ZIF-8 hybrid photocatalysts for rapid bacteria-killing were prepared. AgBiS2@ZIF-8 exhibited excellent photocatalytic activity due to the rapid transfer of photoelectrons from AgBiS2 to ZIF-8, resulting in abundant reactive oxygen species (ROS) to kill bacteria. Meanwhile, AgBiS2@ZIF-8 exhibited a noteworthy photothermal effect, which could effectively convert NIR light into heat. Subsequently, the NIR light-driven antibacterial activity of AgBiS2@ZIF-8/Ti against S. aureus and E. coli was studied. The experimental results showed that AgBiS2@ZIF-8 displayed enhanced photodynamic therapy (PDT) and photothermal therapy (PTT) performance. Under irradiation with 808 nm NIR light for 10 min, AgBiS2@ZIF-8/Ti could effectively eliminate 98.55% of S. aureus in vitro, 99.34% of E. coli in vitro and 95% S. aureus in vivo. At the same time, AgBiS2@ZIF-8/Ti had good biocompatibility. Therefore, AgBiS2@ZIF-8/Ti showed potential as an antibacterial material, which provided a strategy to fight polymicrobial infections.
研究领域:
材料科学
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生物医学工程
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微生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2019
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IF 2.291
Yueting Chen,Shaokun Tang
Zeolitic imidazole framework-8 (ZIF-8) with a novel porous hydrangea-like morphology was successfully synthesized with solvothermal synthesis using zinc nitrate as the metal source and 2-methylimidazole as the organic ligand. The effects of reaction temperature and reaction time on the morphology of the crystal were investigated and the samples were characterized in detail. The results show that the porous hydrangea-like ZIF-8 crystal can be obtained at different temperatures from 110 to 140 °C. At the same temperature, with the increase of reaction time, the particles are transformed from porous hydrangea-like into the rhombohedral polyhedron. Combining primary particle self-assembly with Ostwald ripening , we propose a mechanism for the formation of porous hydrangea-like ZIF-8 in a classical crystal growth pathway. In comparison, ZIF-8 with rhombohedral polyhedron can be quickly synthesized via microwave-assisted synthesis.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2024
·Vol. 31
·期 22
·32935-32949
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IF 0
Wang Junfeng,Wang Heng,Qi Xianjin,Zhi Gang,Wang Jianhua
The high cost and low adsorption capacity of primary metal-organic frameworks (ZIF-8) limit their application in heavy metal removal. In this paper, Co/Zn bimetallic MOF materials were synthesized with excellent adsorption performance for As 5+ . The adsorption reached equilibrium after 180 min and the maximum adsorption was 250.088 mg/g. In addition, Co-ZIF-8 showed strong selective adsorption of As 5+ . The adsorption process model of Co-ZIF-8 fits well with the pseudo-second-order kinetic model ( R 2 =0.997) and Langmuir isotherm model ( R 2 =0.994), and it is demonstrated that the adsorption behavior of the adsorbent is a single layer of chemical adsorption. In addition, when the adsorbent enters the arsenic-containing solution, the surface of Co-ZIF-8 is hydrolyzed to produce a large number of Co-OH active sites, and As 5+ arrives at the surface of Co-ZIF-8 by electrostatic adsorption and combines with the active sites to generate the arsenic-containing complex As-O-Co. After four cycles, Co-ZIF-8 showed 80% adsorption of As 5+ . This study not only provides a new method to capture As 5+ in water by preparing MOF with partial replacement of the central metal, but also has great significance for the harmless disposal of polluted water.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
Cancer Nanotechnology
·
2025
·Vol. 16
·期 1
·1-20
·
IF 4.8
Li Fangling,Liu Chengjing,Gu Wenyi,Xu Qianhe,Li Dongmei,Cao Dongdong,Liu Zhiyong
Kaposi's sarcoma-associated herpesvirus (KSHV) infection can cause a variety of tumors and is one of the leading causes of death in acquired immune deficiency syndrome (AIDS) patients. As a small molecule antiviral drug, ganciclovir (GCV) can be used for anti-KSHV treatment. However, GCV has non-specific action and toxic side effects in vivo, and how to make it safer and more effective against KSHV is still a great challenge. By encapsulating GCV into metal–organic skeleton material zeolitic imidazolate framework-8 (ZIF-8) and further modification of hyaluronic acid (HA), the nanomedical delivery system of GCV (HA/GCV@ZIF-8) has been developed for efficient GCV delivery and targeted anti-KSHV treatment. The modification of HA leads to the targeted binding of the nanocomplex with the overexpressed CD44 receptors in tumor cell membranes, resulting in the increased accumulation and cellular uptake of GCV. Exploiting the decomposition property of ZIF-8 under acidic conditions, the nanocomplex exhibits pH-responsive drug release in slightly acidic tumor environment. In addition, HA/GCV@ZIF-8 not only suppresses expression of KSHV pathogenic genes with less drug dose, but also inhibits the ability of cell proliferation and migration. In vivo anti-tumor results showed that HA/GCV@ZIF-8 accumulated in tumor cells and effectively inhibited tumor growth. The results open a gate for the targeted anti-KSHV treatment. Graphical
研究领域:
医学
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药学
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病毒学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2018
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IF 4.229
Aisheng Huang,Bo Feng
Pristine graphene oxide (GO) sheets were pretreated with polyethyleneimine (PEI) to prepare PEI-modified GO (PEI-GO), which was further inserted with ZIF-8 crystals to form a novel PEI-GO@ZIF-8 nanocomposite for CO 2 capture. The good dispersion of PEI and interlayer growth of ZIF-8 within the GO sheets is helpful for high CO 2 adsorption. Therefore, the PEI-GO@ZIF-8 nanocomposite show high surface area and enhanced CO 2 adsorption capacity . The adsorption capacity of the PEI-GO@ZIF-8 nanocomposite was six times higher than that of the pristine GO and ZIF-8. The CO 2 /N 2 adsorption selectivity was significantly improved due to amine groups loading which provide more sites for CO 2 adsorption. The preferential adsorption of CO 2 over N 2 makes PEI-GO@ZIF-8 nanocomposite be a promising candidate in the field of CO 2 capture.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2019
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IF 8.456
Zhongxi Xie,Shuang Liang,Xuechao Cai,Binbin Ding,Shanshan Huang,Zhiyao Hou,Ping’an Ma,Ziyong Cheng,Jun Lin
Hypoxia and overexpression of glutathione (GSH) are typical characteristics of the tumor microenvironment, which severely hinders cancer treatments. Here, we design a novel biodegradable therapeutic system, O2–Cu/ZIF-8@Ce6/ZIF-8@F127 (OCZCF), to simultaneously achieve GSH depletion and O2-enhanced combination therapy. Notably, the doped Cu2+ doubles the O2 storage capacity of the ZIF-8 matrix, which makes OCZCF an excellent pH-sensitive O2 reservoir for conquering tumor hypoxia, enhancing the photodynamic therapy (PDT) efficiency of chlorin e6 (Ce6) under 650 nm laser irradiation. Moreover, the released Cu2+ can act as a smart reactive oxygen species protector by consuming intracellular GSH. The byproduct Cu+ will undergo highly efficient Fenton-like reaction to achieve chemodynamic therapy (CDT) in the presence of abundant H2O2. The accompanying O2 will further alleviate hypoxia. The in vitro and in vivo experimental data indicate that OCZCF could cause remarkable tumor inhibition through enhanced synergetic PDT and CDT, which may open up a new path for cancer therapy.
研究领域:
癌症研究
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纳米技术
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生物医学工程
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药学
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产品关联
DOI
PubMed
高影响因子
Frontiers in Chemistry
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2019
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IF 3.782
Liu Lijuan,Yang Weiting,Gu Dongxu,Zhao Xiaojun,Pan Qinhe
With the rapid growth of nuclear power generation and fuel processing, the treatment of nuclear industry wastewater has become a major problem, and if not handled properly, it will pose a potential threat to the ecological environment and human health. Herein, a chitosan (CS)/ZIF-8 composite monolithic beads with ZIF-8 loading up to 60 wt% for U(VI) removal was prepared, which can be easily removed after use. It possesses a very high adsorption capacity of 629 mg•g−1 at pH = 3 for U(VI) and a well recyclability is demonstrated for at least four adsorption/desorption cycles. X-ray photoelectron spectroscopy (XPS) was carried out to study the adsorption mechanism between uranium and adsorbent, and the chelation of U(VI) ions with imidazole, hydroxyl, and amino groups was revealed. This work shows that CS/ZIF-8 composite can be used as an effective adsorbent for uranium extraction from aqueous solution, and has a potential application value in wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Food Measurement and Characterization
·
2024
·
IF 2.9
Pang Wanyu,Gao Yali,Chang Xile,Hu Tuoping,Hu Zhiyong,Ma Xuemei
An electrochemical sensing platform based on in-situ acetylene black (AB) template growth ZIF-8 for trace catechin detection in green tea was proposed. Here, the ZIF-8/AB/carbon paper (CP) electrode was constructed by two-step in-situ growth method and hydrothermal method. The characterization showed that AB molecule was well distributed in ZIF-8 pore with large surface area. ZIF-8/AB/CP electrode showed good electrochemical performance for catechin detection, which benefited from the ZIF-8 with larger surface and AB with excellent conductivity. The results showed that ZIF-8/AB/CP electrode was linear in the range of 0.01–200 µM, and the low detection limit for catechin detection was 43.7 nM. ZIF-8/AB/CP also had good reproducibility, anti-interference ability and stability. In addition, the sensor achieved hight-recovery and accuracy in detecting catechin in green tea. As far as we know, our work first reported that ZIF-8/AB composite was synthesized by in-situ growth method as an electrochemical sensing material for the detection of catechin in green tea, which will provide some theoretical analysis and experimental experience for designing and developing electrochemical sensor for the analysis of trace catechin.
研究领域:
分析化学
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材料科学
·
食品科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2018
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IF 6.434
Na Li,Long Zhou,Xiaoying Jin,Gary Owens,Zuliang Chen
In this paper, a Zeolite Imidazole Framework-8 (ZIF-8), was investigated for the removal of a mixture of two common antibiotics, tetracycline (TC) and oxytetracycline hydrochloride (OTC). Batch experiments showed that 90.7% of TC and 82.5% of OTC were simultaneously removed using ZIF-8. The maximum adsorption capacities for TC and OTC were 303.0 and 312.5 mg g −1 , respectively. For both antibiotics’ adsorption followed pseudo-second-order kinetics and best fit the Langmuir adsorption model with R 2 of 0.963 and 0.981, for TC and OTC at 303 K, respectively. The relatively large specific surface area of ZIF-8 (1158.2 m 2 g -1 ) combined with scanning electron microscopy (SEM) and transmission electron microscopy (TEM) indicated that both antibiotics were adsorbed on to the surface of ZIF-8. X-ray powder diffraction (XRD) and Fourier Transform Infrared (FTIR) spectroscopy both indicated the presence of benzene ring structures, associated with both pollutants, on ZIF-8 after reaction; which confirmed adsorption was occurring. XPS also showed the presence of C O double bonds on the surface of ZIF-8 indicating the presence of antibiotics. The adsorption mechanism most likely involved π-π interactions between the conjugated groups in TC/OTC and the imidazole rings of ZIF-8.
研究领域:
环境科学
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材料科学
·
生物学
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产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Miao Miao,Lan Mu,Shaomei Cao,Yuhuan Yang,Xin Feng
Tetracycline (TC) residues have been noted as an important class of emerging contaminants in the environment, thus fast, straightforward, highly sensitive detection method is becoming an issue that must be addressed. Herein, a novel CDs@ZIF-8 sensing material was fabricated by encapsulating luminescent carbon dots (CDs) into the metal-organic framework (ZIF-8) to achieve highly luminescent porous composites. Furthermore, to avoid the secondary contamination caused by powders, a shapable CDs@ZIF-8/CS film sensor as a portable disposable test strip with dual-function of TC detection and adsorption was designed by crosslinking CDs@ZIF-8 with chitosan (CS). The as-prepared CDs@ZIF-8/CS hybrid film exhibited the high sensitivity and selectivity for TC fluorescence detection and rapid decontaminate capability, as well as high optical transmittance and robust mechanical property, which were essential for the practical sensing application. This paper-based dual-functional luminescent sensor exhibits promising practicability for TC detection and contaminant removal in pharmaceutical analysis, food safety and water treatment.
研究领域:
环境科学
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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