Journal of Inorganic and Organometallic Polymers and Materials
·
2022
·Vol. 32
·期 7
·2371-2383
·
IF 3.518
Dai Xiaojun,Feng Sheng,Wu Wei,Zhou Yun,Ye Zhiwei,Wang Yang,Cao Xun
To improve the photocatalytic activity of Bi 2 WO 6 , ZIF-8 was successfully introduced with the in-situ growth for the first time. The addition of ZIF-8 effectively inhibited the recombination of photogenerated electron–hole pairs with further improved electron utilization efficiency. The superoxide anion, .O 2 − , generated, greatly improved the photocatalytic activity. The performance of Bi 2 WO 6 /ZIF-8 in the photodegradation of tetracycline (TC) was studied under different conditions, including the proportions of ZIF-8, the dosage of catalyst, and the concentration of TC. The results indicated that 10 mg of B/Z/5/1 offered the best photocatalytic activity under UV light, achieving 97.8% degradation of TC (20 mg/L) within 80 min. The measured rate constant (k) for TC degradation was almost 3 times that of pure Bi 2 WO 6 . The effects of pH, HA, and inorganic anions on the degradation of TC were also studied for the simulated real water. Further, B/Z/5/1 could be reutilized up to five cycles without reduction of the catalysis performance. Therefore, the Bi 2 WO 6 /ZIF-8 heterojunction composite material can be utilized as an efficient photocatalyst for remediation of environmental pollution.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Qiao Tian,Xiaohua Jia,Jin Yang,Sizhe Wang,Yong Li,Dan Shao,Haojie Song
ZIF-8, a novel lubricant additive, is considered to have great potential in reducing friction and wear due to large specific surface area, thermal stability and mechanical flexibility. However, ZIF-8 nanoparticles readily hydrolyze in aqueous solutions, transforming into large-sized lamellar and rod-like materials, which is a major bottleneck as a water-based lubricant additive. Herein, a strategy is proposed to functionalize ZIF-8 via mussel-inspired polydopamine (PDA) polymerization process to improve its lubrication stability in the water phase. The modified ZIF-8 (PDA@ZIF-8) can firmly “locked” water molecules on the surface of PDA to protect internal structure of ZIF-8, and improve its dispersion and stability of ZIF-8 in water. Moreover, ZIF-8@PDA tribofilm and iron oxide chemical protection film are formed during the friction process, and the low shear strength water layer between the contact surfaces contribute to achieving powerful synergistic lubricating effects, resulting in friction coefficient and wear track width reduce by 65% and 66%, respectively. Therefore, this work provides a promising alternative for expanding the practical application of ZIF-8 in aqueous environment and tribology.
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CRYSTENGCOMM
·
2021
·Vol. 23
·期 24
·4327-4335
·
IF 3.545
Mei-Hua Chen,Qian-Ying Lu,Yi-Ming Li,Ming-Ming Chu,Xue-Bo Cao
ZnO semiconductors have been widely used as photocatalysts. However, the weak photodegradation under solar light restrains their further application. In this study, porous zeolitic imidazolate framework-8 (ZIF-8), which has a high specific surface, was combined with ZnO nanorods to fabricate ZnO@ZIF-8 core–shell heterostructures, with the ZnO nanorods and ZIF-8 as the core and the shell, respectively. Scanning electron microscopy and transmission electron microscopy measurements revealed that the ZnO nanorods were wrapped by a ZIF-8 shell. The pore size distribution of these ZnO@ZIF-8 nanocomposites included micropores, mesopores, and macropores. Moreover, a Brunauer–Emmett–Teller analysis showed an increase compared with the ZnO nanorods in the overall specific surface area. Due to a synergistic effect of ZnO and ZIF-8, the as-synthesized ZnO@ZIF-8 heterostructures exhibited high photocatalytic activity and completely degraded methylene blue in ∼4.5 min under solar light irradiation. Furthermore, stability experiments proved that the as-prepared ZnO@ZIF-8 nanocomposites retain over 95% of their photocatalytic activity after four cycles.
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高影响因子
CARBON
·
2021
·
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.
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高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Cui Sun,Jin-hua Zhang,Xiang-fei Yuan,Jia-ning Duan,Sheng-wen Deng,Jing-min Fan,Jeng-Kuei Chang,Ming-sen Zheng,Quan-feng Dong
The quasi-solid-state electrolytes (QSSEs) with an inorganic skeleton, a solid–liquid composite material combining their respective merits, exhibit high ionic conductivity and mechanical strength. However, most quasi-solid electrolytes prepared by immobilizing ionic liquid (IL) or organic liquid electrolyte in inorganic scaffold generally have poor interface compatibility and low lithium ion migration number, which limits its application. Herein, we design and prepare a ZIF-8-based QSSE (ZIF-8 QSSE) in which the ZIF-8 has a special cage structure and interaction with the guest electrolyte to form a composite electrolyte with good ionic conductivity about 1.05 × 10–4 S cm–1 and a higher lithium-ion transference number of about 0.52. With the ZIF-8 QSSE, a protype lithium battery coupled with LiCoO2 cathode shows good electrochemical performances with an initial discharge capacity of 135 mAh g–1 at 50 mA g–1 and a remaining capacity of 119 mAh g–1 after 100 cycles, only 0.119% capacity degradation per cycle. It is worth noting that the ZIF-8-based QSSEs have good thermal stability up to 350 °C that does not show thermal runaway, which is significantly higher than that of a conventional organic liquid battery system.
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PubMed
高影响因子
JOURNAL OF LUMINESCENCE
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2015
·
IF 2.719
Xi Li,Jie Li,Yingchun Li,Kai Xia
8-hydroxyquinoline aluminum/nano-TiO 2 composites were prepared via in situ. In order to make a better combination of the two component, Octavinyl-T8-silsesquioxane (8-vinyl POSS) was introduced into the composite system . The structure and properties of the samples were characterized by XRD , SEM, XPS , UV–visible absorption, Fluorescence spectra and Time-resolved emission-decay. These results show both β-phase and γ-phase of Alq 3 exist in the composite products. Meanwhile, the addition of nano-TiO 2 and 8-vinyl POSS does not change the crystalline and structure of as-prepared Alq 3 . Interestingly, however, XPS spectra shows that two new kinds of interaction forces emerge after the addition of 8-vinyl POSS, owing to the formation of Al–O–Si and Si–O–Ti bond, presumably. Besides, the emission intensity of Alq 3 /nano-TiO 2 and Alq 3 /8-vinyl POSS/nano-TiO 2 increases by 22% and 33%, respectively. The addition of TiO 2 and 8-vinly POSS will not affect the position of emission peak, but will increase the transmission efficiency in electron–hole pairs. In the meantime, surprisingly, the modified Alq 3 has a longer lifetime than as-prepared Alq 3 .
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高影响因子
RSC Medicinal Chemistry
·
2024
·
IF 4.1
Yingzhen Guan,Michel Nguyen,Anne Robert,Yan Liu,Bernard Meunier
Cancer cell proliferation and metastasis are known to be dependent on angiogenesis which is regulated by several parameters including copper availability. Tetradentate monoquinoline (TDMQ) ligands constitute a series of chelators tailored to regulate copper homeostasis due to their specificity for copper(II) with respect to Cu(I) or other biometals like iron or zinc. One of these chelators, TDMQ20 efficiently inhibits both proliferation and migration of several human cancer cell lines, better than the reference drug 5-fluorouracil, and with higher selectivity indexes with respect to non-cancer human cells. The biological activity of TDMQ20 may be driven by the coordination chemistry of copper, and the ability of this chelator to restore copper homeostasis and its subsequent redox properties. The anticancer mechanism of action of TDMQ20 involves intracellular production of reactive oxygen species, drastic mitochondrial damages and induction of tumor cell apoptosis. These data support the selection of TDMQ20 as drug-candidate against several human cancers.
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PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2024
·Vol. 27
·期 32
·e202400241
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IF 2.2
Donglin Jiang,Yuchen Zhou,Mengfan Du,Zezhi Chen,Huijuan Gong
Graphical The modification of ZIF-8 with dopamine results in a large amount of hydrophilic and CO 2 friendly groups introducing into the ZIF-8 molecules, and the structure and specific surface area of ZIF-8 is also improved. These factors lead to an improvement performance of ZIF-8 in the catalytic CO 2 absorption in water and alkaline solutions. CO 2 capture technology has been widely used to reduce CO 2 emissions, resulting in a variety of capture methods and materials. Among them, the more widely used is the chemical absorption method. However, the chemical absorption method has problems such as high energy consumption and slow absorption rate. In order to solve the above problems, we prepared an effective catalyst to improve the CO 2 absorption rate. ZIF-8 and hydrophilic ZIF-8-DA were prepared by in situ synthesis under ambient conditions. The catalytic effect of the hydration reaction of ZIF-8 and ZIF-8-DA was tested using CO 2 absorption regeneration experiments under aqueous and alkaline conditions, respectively. The results showed that the synthesized catalysts could significantly enhance the CO 2 absorption in water and alkaline solution. The addition of 0.1 wt % of ZIF-8 in alkaline solution increased the average CO 2 absorption by 1.80–15.84 %, respectively, while the addition of 0.1 wt % of ZIF-8-DA increased the CO 2 absorption by 7.01–25.36 %. In addition, both catalysts had excellent reusability and maintained high performance even after five absorption and regeneration cycles. Polymer dispersibility index (PDI) results showed that ZIF-8-DA dispersed more uniformly in aqueous solution.
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Junran Yang,Xinglong Liu,Yan Tang,Xiaoyu Bi,Huiying He,Xiaohang Sun,Qi Sui,Donglin Li,Wencong Liu,Dadong Liang,Chuanbo Ding
To avoid the problem of difficult wound healing caused by diabetes. In this study, zeolite imidazolium ester skeleton-8 (ZIF-8) was loaded with dihydroquercetin (DHQ) in order to improve the slow-release property as well as the biological activity of DHQ, and the mechanism of wound healing action of ZIF-8-loaded hydrogel was investigated by Western blot technique. The results showed that the dynamic light scattering result was 90.54 ± 3.45 nm and the zeta potential was −32.91 mV. In addition, through the synergistic effect of ZIF-8 and DHQ, the hydrogel exhibited excellent in vitro activity, and the in vitro antioxidant results showed that the inhibition rate of DZP hydrogel against the free radicals of ABTS and DPPH was over 90%, and the inhibition rate against Escherichia coli and Staphylococcus aureus was over 90%, respectively, and also promoted cell growth and migration. In addition, the in vitro release assay of DHQ from DZP hydrogel at 24 h showed 61.69 ± 1.93% at pH = 6.0 and 62.42 ± 1.58% at pH = 7.4, which improves the slow-release property of DHQ and is suitable for long-term tissue repair applications. The results of in vivo experiments showed that DZP hydrogel promotes the healing of difficult-to-heal wounds by inhibiting the activation of the IkBα/NF-κB pathway, stimulating skin neovascularisation, and promoting collagen accumulation. Collectively, these properties make DZP a strong candidate for diabetic wound dressings and are expected to play an important role in wound management.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2025
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IF 5.7
Ru Jia,Fugui Xiao,Qiaofang Fu,Ying Wu
BiOI was modified with poly(3,4-ethylenedioxythiophene)-polystyrene sulfonate (PEDOT:PSS) to function as an organic hole conductor, thereby accelerating the transfer of light-generated holes. Subsequently, the catalyst was immobilized on ZIF-8 to enhance the contact area between the active sites of the catalyst and the pollutant. The successful preparation of the ZIF-8@BiOI/PEDOT:PSS was confirmed through various characterizations. Compared to pure BiOI, the ZIF-8@BiOI/PEDOT:PSS composite material demonstrates markedly enhanced visible-light-driven photocatalytic activity in the degradation of Rhodamine B (RhB) dye. The ZIF-8@BiOI/PEDOT:PSS composite photocatalyst exhibits a maximum RhB degradation efficiency of 92.64%, with a degradation rate constant (k) approximately 2.9 times higher than that of pure BiOI. Additionally, the ZIF-8@BiOI/PEDOT:PSS also exhibits outstanding photocatalytic performance in the degradation of methylene blue and methyl orange. Moreover, its catalytic activity remains nearly unchanged after five consecutive reuse cycles, demonstrating excellent recyclability. This study presents a novel strategy for improving the photocatalytic performance of such materials.
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高影响因子
Advanced Healthcare Materials
·
2022
·Vol. 11
·期 12
·2102739
·
IF 11.092
Yanyun Hao,Hui Li,Huajun Zhao,Yutong Liu,Xiaoyan Ge,Xia Li,Hongfei Chen,Ailu Yang,Jing Zou,Xue Li,Xuechun Sun,Xinke Zhang,Xiao Wang,Zepeng Li,Qilu Zhang,Hao Wu,Guan Wang,Jian Zhang,Bruno G. De Geest,Zhiyue Zhang
Cancer immunotherapy is revolutionary in oncology and hematology. However, a low response rate restricts the clinical benefits of this therapy owing to inadequate T lymphocyte infiltration and low delivery efficiency of immunotherapeutic drugs. Herein, an intelligent nanovehicle (folic acid (FA)/1-(4-(aminomethyl) benzyl)-2-butyl-1H-imidazo[4,5-c]quinolin-4-amine (IMDQ)-oxaliplatin (F/IMO)@CuS) armed with multifunctional navigation is designed for the accurate delivery of cargoes to tumor cells and dendritic cells (DCs), respectively. The nanovehicle is based on a near infrared-responsive inorganic CuS nanoparticles, acting as a photosensitizer and carrier of the chemotherapeutic agent oxaliplatin, and enters tumor cells owing to the presence of folic acid on the surface of CuS upon intratumoral injection. Furthermore, a toll-like receptor (TLR) 7/8 agonist-conjugated polymer, anchored on the surface of CuS, is modified with mannose to bind with DCs in the tumor microenvironment. Upon exposure to laser irradiation, nanovehicles disassemble, releasing oxaliplatin, to ablate tumor cells and amplify immunogenic cell death in combination with photothermal therapy. Mannose-modified polymer-TLR7/8 agonist conjugates are subsequently exposed, leading to the activation of DCs and proliferation of T cells. Collectively, these intelligent nanovehicles reduce tumor burden, exert a robust antitumor immune response, and generate long-term immune protection to prevent tumor recurrence.
研究领域:
肿瘤学
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免疫学
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纳米技术
·
药学
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PubMed
高影响因子
Advanced Materials Interfaces
·
2016
·Vol. 3
·期 24
·1600725
·
IF 3.365
Xiu Dai,Yu Cao,Xiaowei Shi,Xinlong Wang
In this study, the nanoparticles of metal–organic framework ZIF-8 are incorporated into the poly(lactic acid) (PLA) to prepare the nanocomposite electrospun membrane. The diameter and the surface roughness of the fibers can be successfully controlled by increasing the content of ZIF-8 in the membranes. The prepared PLA/ZIF-8 membranes have increased oil wettability and significantly improved mechanical property compared with pure PLA membrane. The tensile strength, stain at break of PLA/ZIF-8 membrane with 0.5 wt% ZIF-8 are increased to 5.02 MPa and 88.81% compared to 2.77 MPa and 57.89% for pure PLA membranes, respectively. The PLA/ZIF-8 membranes are proved to be good candidate for oil/water separation with high efficiency because of the fast oil wetting ability, the roughness of fibers, and the adsorption effect of the porous ZIF-8 nanoparticles.
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