Materials Today Advances
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2026
·
IF 8
Youbin Li,Xin Li,Tengyue Liu,Chengzhe Yang,Qiang Gao,Lanfeng Huang
The failure of titanium implants in osteoporotic patients is frequently attributed to a disrupted microenvironment characterized by excessive oxidative stress and an imbalance between bone formation and resorption. To address this, we engineered a functionalized composite scaffold (Ti/Gel/ZM) by incorporating melatonin-loaded zeolitic imidazolate framework-8 (ZIF-8) nanoparticles into a gelatin methacryloyl (GelMA) hydrogel on a 3D-printed titanium alloy scaffold. This scaffold was designed to provide a pH-responsive release of zinc ions and melatonin, triggered by the acidic osteoporotic microenvironment. In vitro assays demonstrated that the scaffold effectively scavenged reactive oxygen species (ROS), thereby restoring mitochondrial membrane potential and rescuing the osteogenic differentiation capacity of bone marrow mesenchymal stem cells (BMSCs) via the upregulation of Runx2, ALP, BMP2 and COL1. Simultaneously, the composite scaffold significantly inhibited RANKL-induced osteoclastogenesis in RAW264.7 cells. In vivo evaluation in an ovariectomized rat model confirmed that the Ti/Gel/ZM scaffold promoted rapid osseointegration and trabecular bone regeneration, as evidenced by enhanced bone volume fraction (BV/TV) and trabecular thickness. These results suggest that the Ti/Gel/ZM composite scaffold is a promising candidate for improving the osseointegration of titanium alloy implants in osteoporotic bone.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2022
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IF 4.383
Ningning Zhao,Zhong Yu,Haixia Ma,Ergang Yao,Ting An,Fengqi Zhao,Xiaojiao Yu
Fe 2 O 3 /zeolitic imidazolate framework-8 (ZIF-8) architectures were successfully prepared by a polyvinylpyrrolidone (PVP)-assisted method, which can be as an effective potential catalyst for promoting the thermal degradation of nitrocellulose (NC). Thermal behavior and degradation kinetics of catalyst-NC mixtures were studied using the TG/DTG and DSC methods, and found that the Fe 2 O 3 /ZIF-8-NC pyrolysis possessed a total degradation of 77.96%, a maximum pyrolysis rate temperature of 194.5 °C, and the lowest activation energy of 179.4 ± 16.1 kJ mol −1 , confirming a better thermocatalytic performance of Fe 2 O 3 /ZIF-8 when compared to Fe 2 O 3 and ZIF-8 for NC thermolysis. Furthermore, it can be inferred from the isoconversional analysis, which employs a modified fitting algorithm, that catalyst-NC mixtures and pure NC adhere to the reconstructed “n-order” reaction models. This work showed how a catalyst of the metal oxide/metal-organic frameworks (MOFs) type could improve the pyrolysis of NC, which could serve as a significant reference for the development of additional catalysts of the metal oxide/MOFs for use in NC-based energetic materials.
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JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2023
·Vol. 98
·期 5
·1166-1174
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IF 3.4
Min Yuan,Zhiqing Liu,Tiantian Lv,Jinxiang Dong,Qi Shi
BACKGROUND The separation of furfural from a low-concentration multicomponent and acid-containing aqueous solution is a highly demanding process; traditional distillation requires an excessive amount of energy. Herein, we demonstrated ZIF-8-derived microporous carbon (C) as a promising adsorbent for the separation of furfural using adsorption isotherms, dynamic column adsorption, adsorption kinetics and desorption studies. RESULTS In the competitive adsorption kinetics experiments with a furfural/acetic acid concentration of 50/20 g L −1 , the acetic acid adsorbed in the micropores of NC ZIF-8 1000C-800A gradually was replaced by furfural, whereas the amount of acetic acid in the mesopores of NC ZIF-8 800C-800A slowly increased. In addition, the micropores of NC ZIF-8 1000C-800A exhibited highly efficient and fast adsorption characteristics toward furfural over a wide furfural/acetic acid concentration range (0–50/0–20 g L −1 ) with the furfural adsorption capacity reaching an adsorption equilibrium within 10 min. The results show that the high Brunauer–Emmett–Teller surface area of NC ZIF-8 1000C-800A is responsible for the high furfural adsorption capacity (1205.3 mg g −1 ) and the confined microporous structure can strengthen the π–π interactions between porous C and furfural, thereby enhancing the selectivity of furfural/acetic acid (61.4) in the furfural/acetic acid (50/20 g L −1 ) dynamic column adsorption system. Meanwhile, the desorption ratio of furfural in the dynamic desorption system reached as high as 98.6%. CONCLUSION The unique micropore-confinement effect and excellent adsorption behavior make NC ZIF-8 1000C-800A an efficient adsorbent for furfural in the furfural–acetic acid system. © 2023 Society of Chemical Industry (SCI).
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JOURNAL OF SOLID STATE CHEMISTRY
·
2023
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IF 3.3
Yongmin Chen,Shulan Pu,Dongying Wang,Yongchao Zhang,Guojiang Wan,Qiang Zhao,Yan Sun
Zeolitic imidazolate framework-8 (ZIF-8) was coupled with AgBr using a facile deposition–precipitation method to synthesize AgBr@ZIF-8 composites. The photocatalytic activity of prepared photocatalysts was evaluated by the degradation of Rhodamine B (RhB). As expected, the photocatalytic activity of the AgBr@ZIF-8 photocatalysts was superior to that of ZIF-8 and AgBr. Among the AgBr@ZIF-8 photocatalysts, AgBr@ZIF-8 with a ZIF-8 loading of 5 wt% exhibited the highest photocatalytic efficiency of 99.5 % within 15 min. The remarkable photocatalytic activity of the AgBr@ZIF-8 composites was attributed to the heterojunction between ZIF-8 and AgBr, which reduced the recombination rate of electron-hole pairs, thereby enhancing the photocatalytic efficiency of the catalysts. According to the trapping experiment, superoxide radicals (•O 2 - ) and holes (h + ) were certified as the main species in the efficient removal of RhB.
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RSC Advances
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2022
·Vol. 12
·期 7
·4408-4416
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IF 4.036
Guanhao Liu,Jingyi Yang,Yibo Zhao,Xinru Xu
Novel modified MOF intercalated hydrotalcites was synthesized for catalyzing the conversion of glycerol into high value-added glycerol carbonate in this paper. [APmim]OH/ZIF-8 was prepared by encapsulating aminopropyl hydroxide imidazole ionic liquid in ZIF-8 and inserted in Ca–Mg–Al hydrotalcites with layered structures to prepare [APmim]OH/ZIF-8/LDH with strong basicity and high specific surface area. ZIF-8, [APmim]OH/ZIF-8 and [APmim]OH/ZIF-8/LDH were characterized by XRD, FT-IR, SEM and nitrogen adsorption–desorption. The results showed that the conversion rate of glycerol can reach 98.6% and the glycerol carbonate yield was 96.5% in the transesterification of glycerol with dimethyl carbonate catalyzed by [APmim]OH/ZIF-8/LDH when the molar ratio of DMC and glycerol was 3 : 1, the catalyst dosage was 3 wt%, the reaction temperature was 75 °C and the reaction time was 80 minutes. The glycerol conversion rate can still reach more than 90% after five reaction cycles.
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ADSORPTION SCIENCE & TECHNOLOGY
·
2022
·
IF 4.373
Zhijuan Zhang,Pengwei Li,Ting Zhao,Yuanhan Xia
The ZIF-8 crystals were successfully postsynthetically modified using methylamine (MA), ethylenediamine (ED), and N, N-dimethylethylenediamine (MMEN) to improve their adsorption performance toward CO2. Results showed that, compared with the original ZIF-8, the BET specific surface area of MA-ZIF-8, MMEN-ZIF-8, and ED-ZIF-8 has increased by 118.2%, 92.0%, and 29.8%, respectively. In addition, their total pore volume increased separately by 130.8%, 100%, and 48.7%. The adsorption capacities of CO2 on the amine-modified ZIF-8 samples followed the order . The CO2 adsorption capacities at 298 K on MA-ZIF-8, MMEN-ZIF-8, and ED-ZIF-8 were increased by 118.2%, 90.2%, and 29.8%, respectively. What is more, the CO2/N2 selectivities calculated using an IAST model of the amine@ZIF-8 samples at 0.01 bar and 298 K were also significantly improved and followed the order , which increased by 173.0%, 121.4%, and 22.6%, respectively. The isosteric heat of CO2 adsorption () on the MA-ZIF-8, MMEN-ZIF-8, and ED-ZIF-8 all becomes higher, while of N2 on these samples was slightly lower in comparison with that on the ZIF-8. Furthermore, after six recycle runs of gravimetric CO2 adsorption-desorption on MA-ZIF-8, the adsorption performance of CO2 is still very good, indicating that the MA-ZIF-8 sample has good regeneration performance and can be applied into industrial CO2 adsorption and separation.
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Acta Biomaterialia
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2022
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IF 10.633
Yun Liu,Ting Li,Maolei Sun,Zhiqiang Cheng,Wenyuan Jia,Kun Jiao,Shaoru Wang,Kongzhao Jiang,Yuheng Yang,Zhihui Dai,Liping Liu,Guomin Liu,Yungang Luo
Periodontitis is a chronic inflammatory disease caused by plaque that leads to alveolar bone resorption . In the treatment of periodontitis, it is necessary to reduce the bacterial load and promote alveolar bone regeneration . In this study, zeolitic imidazolate framework-8 (ZIF-8) is used in the treatment of periodontitis, and an injectable photopolymerizable ZIF-8/gelatin methacryloyl (GelMA) composite hydrogel (GelMA-Z) is constructed. We confirm that ZIF-8 nanoparticles are successfully loaded into GelMA, which demonstrates fluidity and photopolymerizability. GelMA-Z continuously releases Zn 2+ and shows good cytocompatibility. In vitro , GelMA-Z can effectively upregulate the expression of osteogenesis-related genes and proteins, increase alkaline phosphatase activity, promote extracellular matrix mineralization by rat bone mesenchymal stem cells, and exert an obvious antibacterial effect against Porphyromonas gingivalis . In vivo , GelMA-Z reduces the bacterial load, relieves inflammation and promotes alveolar bone regeneration in a rat model. The above results show that GelMA-Z has potential prospects in the treatment of periodontitis. Statement of significance Various methods have been explored for the treatment of periodontitis. However, current regiments have difficulty achieving ideal alveolar bone regeneration. In this study, we constructed a zeolitic imidazolate framework-8 (ZIF-8)/gelatin methacryloyl (GelMA) composite hydrogel (GelMA-Z). (1) The injectable and photopolymerizable GelMA-Z showed biocompatibility in vitro and in vivo . (2) GelMA-Z continually released zinc ions to promote the osteogenic differentiation of bone mesenchymal stem cells and kill bacteria in vitro . (3) In a rat model, the GelMA-Z pregel solution was used to fill the periodontal pocket and then crosslinked by UV exposure. GelMA-Z can stably remain in the periodontal pocket to reduce the bacterial load, relieve inflammation and promote alveolar bone regeneration. In conclusion, GelMA-Z has great potential for use in the treatment of periodontitis, especially in promoting alveolar bone regeneration.
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PubMed
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APPLIED SURFACE SCIENCE
·
2022
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IF 7.392
Jiaming Wang,Minxin Shi,Yuanyuan Qin,Yuhua Huang,Xiancai Li,Xiaohua Cao
The enrichment and recovery of low concentration rare earth ions from wastewater resources has become an important research direction to achieve high quality utilization of rare earth resources. In this experiment, graphitic carbon nitride was used as the substrate, which was firstly compounded with Fe 3 O 4 to become magnetic graphitic carbon nitride material by alcohol heat method, and then in situ compounded with ZIF-8 in aqueous phase at room temperature to form the composite g-C 3 N 4 /Fe 3 O 4 @ZIF-8. Finally, the composite was characterized. The adsorption performance of g-C 3 N 4 /Fe 3 O 4 @ZIF-8 and the control g-C 3 N 4 /Fe 3 O 4 and ZIF-8 for La(III) under various conditions was investigated by adsorption experiment. In addition, the types and mechanism of La(III) adsorption were discussed by kinetic, isothermal adsorption line and thermodynamic modeling studies. Finally, the stability performance and reusability of the composite were evaluated by regeneration experiments. The result show that g-C 3 N 4 /Fe 3 O 4 @ZIF-8 has good adsorption performance on lanthanide ions. g-C 3 N 4 /Fe 3 O 4 @ZIF-8 reached adsorption equilibrium at about 20 min. When pH is 6 and the solid–liquid ratio of adsorbent is 0.25 g/L, the adsorption amount was 176.68 mg/g. g-C 3 N 4 /Fe 3 O 4 @ZIF-8 had good selectivity for lanthanum(III), and it retains 81 % of initial adsorption performance after five times of reuse.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
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IF 4.831
Ruihong Yao,Zhijian Li,Panpan Huo,Congcong Gong,Gang Liu,Chunhong Zheng,Shouzhi Pu
In this study, we constructed zinc based metal–organic framework functionalized by L-histidine (His@ZiF-8). The His@ZiF-8 had high porosity, large surface area, abundant carboxyl and amino group, which has been found to greatly enhance the aggregation-induced emission (AIE) of tetracycline (TC). After the His@ZiF-8 enrichment with TC, the TC exhibited strong fluorescence emission peak at 565 nm based on AIE. Under the optimal conditions, the fluorescence intensity of TC exhibited a good linear relationship with TC concentration within 0.1–80 μM with a low limit of detection of 28.6 nM. Antibiotic analogs such as neomycin, chloramphenico, ampicillin, kanamycin, and erythromycin have no obvious interference. In addition, the developed method was successfully used to the detection of TC in milk, river water, and honey.
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PubMed
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
Yaling Ye,Longwei Yin,Gary Owens,Zuliang Chen
Controlling the slow release of drugs in carriers and reducing environmental pollution and damage from antibiotics is important and challenging research. In this paper, a novel composite material of carbonized FeNPs@ZIF-8 (C-Fe 3 O 4 @ZIF-8) was used to load and release doxorubicin hydrochloride (DOX). Compared with conventional ZIFs materials, greatly enhancing the magnetic properties , drug loading capacity and controlled drug release of the carrier agent. Interestingly, by establishing a dual stimulus response system with environmental factors of pH and temperature, results showed release rate of 61.6 % at a pH of 3 and a temperature of 37 °C. In addition, the SEM-EDS results showed that the surface of C-Fe 3 O 4 @ZIF-8 was partially broken but maintained a stable morphology before and after release. Meanwhile the nitrogen absorption desorption curve (BET) and hysteresis loop reveal that C-Fe 3 O 4 @ZIF-8 can maintain a large specific surface area and a magnetization intensity of 12.4 emu g −1 after release. X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR), on the other hand, reveal the presence of partial ligand and hydrogen bond breaks during the release of DOX from DOX-loaded C-Fe 3 O 4 @ZIF-8. Finally, the release of DOX from C-Fe 3 O 4 @ZIF-8 at different pH and temperature is consistent with the Higuch and Bhaskas models, where the latter dominates and proposes a release mechanism. Therefore, the magnetic composite C-Fe 3 O 4 @ZIF-8 in this study has great potential for DOX to effectively control drug release and targeted cancer therapy.
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Nanoscale
·
2022
·Vol. 14
·期 36
·13308-13314
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IF 8.307
Q. Wang,D. Xie,F. Y. Li,H. L. Liu,G. X. Chen,M. G. Yu
Materials with super-wetting ability have attracted wide attention from both academia and industry due to their great potential applications. A straightforward and versatile route was proposed for the large-scale synthesis of a monodisperse raspberry-like metal–organic framework (ZIF-8) using zinc nitrate as a zinc source and dimethylimidazole as an organic ligand in aqueous solution. After hydrophobic treatment with hexadecyltrimethoxysilane, the ethanolic suspension of three-dimensional raspberry-like ZIF-8 showed excellent superhydrophobic properties. Furthermore, commercial adhesives were used to blend with the suspension to improve the bonding strength to different substrates. These surfaces retained their water resistance after 50 finger-wipe cycles, 40 sandpaper abrasions and knife scratches. Moreover, the prepared hydrophobic surface can withstand the impact of water flow for 10 minutes. The formulations developed can be used for superhydrophobic coating applications on different substrate surfaces such as aluminum foil, glass, paper and cotton.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xinru Zhang,Xiaofeng Ren,Yonghong Wang,Jinping Li
Mixed matrix composite membranes (MMCMs) for CO 2 capture have great potential in carbon neutral goal. However, simultaneous enhancement in permeance and selectivity is very difficult, since mismatching pore and chemical structures of filler with polymer matrix are the stumbling block. Herein, novel core–shell MOFs@COFs hybrids were prepared by growing hierarchical pore covalent organic frameworks (COFs, nitrogen-enriched nanoporous polytriazine (NENP)) on the surface of metal organic framework (MOFs, zeolite imidazolate framework-8 (ZIF-8)), where ethylenediamine were impregnated into NENP pore to adjust the chemistry environment of the shell. Subsequently, a porous polysulfone (PSf) membrane-supported MMCMs were developed by a coating method using a mixed dispersion of ZIF-8@NENP-NH 2 and polyvinylamine (PVAm), which was used to efficiently separate CO 2 from N 2 . The rough COFs layer (NENP-NH 2 ) was closely wrapped on the smooth surface of ZIF-8 as identified by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and N 2 adsorption. Even-distributed ZIF-8@NENP-NH 2 had well miscibility with the PVAm matrix from hydrogen bonding as evidenced by SEM, attenuated total reflectance-FTIR and differential scanning calorimetry. The CO 2 permeance as high as 301 GPU accompanied with a selectivity of 91 was obtained for MMCMs loaded with 7 wt% ZIF-8@NENP-NH 2 , which were enhanced by 296.1% and 89.6%, respectively, when compared with the pristine PVAm membrane, transcending 2019 upper bound. We assume that the surface chemistry environment in hierarchical pore of the shell and molecular sieving pore in the core in the short-range order facilitate CO 2 permeation. Furthermore, this membrane maintained an average CO 2 permeance of 369 GPU and a CO 2 /N 2 selectivity of 97.3 for over 360 h using CO 2 /N 2 mixed gas as feed gas.
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