ACS Applied Materials & Interfaces
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2020
·
IF 8.758
Hexiang Sun,Zachary Magnuson,Wenwen He,Weijie Zhang,Harsh Vardhan,Xiaolong Han,Gaohong He,Shengqian Ma
The desulfurization property of conventional mixed matrix membranes (MMMs) cannot meet the necessary demand due to particles aggregation and interface defects. Here, we put forward a layer-by-layer (LBL) approach to make a novel PEG@ZIF-8/poly(vinylidene difluoride)(PVDF) composite membrane for pervaporation desulfurization. In this way, a ZIF-8 layer is covered on the surface of the PVDF porous membrane via an in situ growth method. Then, a PEG layer is covered on the ZIF-8 layer by a casting method. Compared with pristine PEG membranes, the separation performance of the ZIF-8@PEG/PVDF nanocomposite membrane increased significantly. This can be attributed to the homogeneous ZIF-8 particle layer and better compatibility between the poly(ethylene glycol) (PEG) matrix and ZIF-8 particles. The membrane achieves a maximum total flux of 3.08 kg·m–2·h–1 at the third in situ growth cycles of ZIF-8 particles and a maximum sulfur enrichment factor of 7.6 at the sixth in situ growth cycles of ZIF-8 particles.
研究领域:
化学工程
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材料科学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xing Li,Jun Wang,Wanzhen Li,Feiyang Xu,Yuan Gao,Ting Cui,Kai Yang,Weiwei Zhang,Fei Ge,Yugui Tao
Tumors pose a significant threat to human well-being, presenting substantial risks to lives. Conventional approaches to cancer treatment exhibit limited efficacy in eliminating the disease, leading to undesirable outcomes and an increased likelihood of disease relapse. The application of chemotherapy and photothermal therapy has recently shown an increasing trend, owing to their limited negative effects and exceptional specificity. Chemotherapy can potentially induce a rapid reduction in tumors during initial treatment. However, it carries the risk of inducing drug resistance, ultimately contributing to tumor recurrence. Combination therapy offers more advantages, than single chemotherapy. Photothermotherapy and photodynamic therapy have gained significant public interest as innovative approaches to medical treatment. Nonetheless, gold nanorods demonstrate notable potential as exceptional photothermal agents in photothermal therapy. An acidic microenvironment is commonly found in tumors. With this factor considered, a tumor-specific cleavable material is used to encapsulate the drug for facilitating controlled release exclusively within the tumor microenvironment. The combination of dequalinium chloride and artesunate increases its selectivity toward mitochondria, enhancing its effectiveness as a chemotherapy agent. The gold nanorods were successfully employed to encapsulate the drug with ZIF-8, enabling precise transportation to the tumor location while preserving its stability. The therapeutic effectiveness of the treatment on mouse models with NCI-H1299 tumors was highly satisfactory, also demonstrating high biological safety, revealing its potential capabilities in cancer therapy. It provides a research basis for nanomaterials to inhibit tumors.
研究领域:
肿瘤学
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纳米医学
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药理学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Shuai Fan,Huiyuan Cheng,Manman Feng,Xuemei Wu,Zihao Fan,Dongwei Pan,Gaohong He
The conversion of CO 2 electrocatalytic hydrogenation into energy-rich fuel is considered to be the most effective way to carbon recycle. Nitrogen-doping carbonized ZIF-8 is proposed as carrier of the earth-rich Sn catalyst to overcome the limit of electron transfer and CO 2 adsorption capacity of Sn. Hierarchically porous structure of Sn doped carbonized ZIF-8 is controlled by hydrothermal and carbonization conditions, which induces much higher specific surface area than that of the commercial Sn nanoparticle (1003.174 vs. 7.410 m 2 ·g −1 ). The shift of nitrogen peaks in X-ray Photoelectron Spectroscopy spectra indicates interaction between ZIF-8 and Sn, which induces the shift of electron cloud from Sn to the chemical nitrogen to enhance conductivity and regulate electron transfer from catalyst to CO 2 . Lower mass transfer resistance and Warburg resistance are investigated through EIS, which significantly improves the catalytic activity for CO 2 reduction reaction (CO 2 RR). Onset potential of the reaction is reduced from −0.74 V to less than −0.54 V vs. RHE. The total Faraday efficiency of HCOOH and CO reaches 68.9% at −1.14 V vs. RHE, which is much higher than that of the commercial Sn (45.0%) and some other Sn-based catalyst reported in the literature.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Pascal Habimana,Yanjun Jiang,Jing Gao,Jean Bernard Ndayambaje,Osama M. Darwesh,Jean Pierre Mwizerwa,Xiaobing Zheng,Li Ma
The continuous use of chemical dyes in various industries, and their discharge into industrial effluents, results in severe problems to human life and water pollution. Laccases have the ability to decolorize dyes and toxic chemicals in industrial effluents as green biocatalysts. Their possible industrial applications have been limited by poor reusability, low stability, and loss of free laccase action. In this research, laccase was immobilized on zeolitic imidazolate framework coated multi-walled carbon nanotubes (Laccase@ZIF-8@MWCNTs) via metal affinity adsorption to develop an easy separable and stable enzyme. The optimum reaction conditions for immobilized laccase are at a pH of 3.0 and a temperature of 60 °C. The immobilized laccase was enhanced in storage and thermal stability. The results indicated that Laccase@ZIF-8@MWCNTs still maintained 68% of its original activity after 10 times of repeated use. Most importantly, the biocatalytic system was applied for decolorization of different dyes (20 mg·L −1 ) without a mediator, and up to 97.4% for Eriochrome black T and 95.6% Acid red 88 was achieved in 25 min. Biocatalysts with these properties may be used in a variety of environmental and industrial applications.
研究领域:
环境科学
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生物技术
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2023
·
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.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
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.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2022
·
IF 1.438
Wan Gao,Yanliang Li,Wuming Xie,Jianzhi Huang,Lei Li,Zhixin Qiu
Antibiotics are a class of organic pollutant in the medical field for hundreds of years. Due to the continuous discharge of antibiotics in the environment, the phenomenon of pseudo-persistence of antibiotics is produced. Therefore, it is necessary to develop an advanced sustainable technology to remove antibiotics from water resources. In this study, Zeolite Imidazole Framework-8 (ZIF-8) was prepared by a simple and rapid method. Oxytetracycline (OTC) degradation was performed using ZIF-8 as a photocatalyst under visible light (VL) (500 W xenon lamp) irradiation. Under different experimental conditions, ZIF-8 has strong catalytic removal performance for OTC. When the reaction conditions are: OTC concentration of 80 mg L − 1 , ZIF-8 concentration of 1.0 g L − 1 , pH 5.96, the OTC removal rate is more than 90%. Through the detection and analysis of degradation intermediates, the possible degradation pathway of OTC was proposed. This study showed that the OTC removal rate of ZIF-8 could still reach 69% after four times of recycling. The results showed that the ZIF-8/VL system had high OTC removal efficiency and good recyclability.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2020
·Vol. 26
·期 35
·7918-7922
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IF 4.857
Yichen Zhou,Mingmin Jia,Xiongfei Zhang,Jianfeng Yao
Graphical Filling the voids : Etched ZIF-8 (ZIF-8-E) crystals permeated by open through pores of size about 100 nm have been introduced into a polyethersulfone membrane matrix. The resulting material shows enhanced CO 2 /N 2 separation performance (see scheme). Zeolite ZIF-8 has been etched with acid to form microporous ZIF-8-E crystals. These were then introduced into a polyethersulfone (PES) membrane matrix to enhance its CO 2 /N 2 separation performance. Open through pores of size about 100 nm formed in the ZIF-8 crystals allow the ingrowth of polyethersulfone chains, ensuring a reduction in the number of nonselective voids, thereby achieving better interaction between ZIF-8-E and PES. As a result, the CO 2 /N 2 separation performance of the ZIF-8-E/PES membrane increased significantly, showing a CO 2 permeability of 15.7 Barrer and a CO 2 /N 2 ideal selectivity of 6.5.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Changhai Fan,Zhengwang Xia,Haiqian Lian,Luogang Wu,Eryue Song,Jingxian Hua,Li Shen,Rujing Hou,Yichang Pan,Weihong Xing
The ZIF-8 membrane has emerged as a promising candidate for C 3 H 6 /C 3 H 8 separation. However, the feasibility of ZIF-8 membranes for applications has rarely been investigated with gas provided directly by the industry sector. Herein, the C 3 H 6 /C 3 H 8 mixture collected from the backend of the Hydrogen Peroxide to Propylene Oxide (HPPO) process was applied as feed gas to examine the separation performance of tubular ZIF-8 membranes. The membranes exhibited excellent separation performance and long-term stability under 9 bar and 50 °C. Noticeably, upon scaling up to a membrane area of 452.16 cm 2 by connecting six three-channel modules in series (multi-step membrane), its separation performance satisfied the C 3 H 6 circulation requirements during the HPPO process (purity ≥97.5 % and recovery rate ≥85 %). Furthermore, a simulation of membrane operation under industrial working conditions (22 bar and 56.3 °C) was performed. By fixing the separation factor at 15, a minimum membrane area of 800 m 2 met the requirements at the cost of membrane permeance with 120 GPU. The corresponding economic calculation indicated a maximum of 91.8 % annual capital cost saving compared with the distillation process, paving the way for the practical application of membranes.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Da Teng,Wenxiang Zheng,Lei Wu,Ghulam Murtaza,Zihui Meng,Lili Qiu
Formaldehyde and other harmful gases cause environmental pollution and threaten human health. Environment-friendly coatings is an effective strategy to address these environmental and health concerns. In this study, a large-scale amorphous photonic crystals (APC) based on modified ZIF-8 (H xh -ZIF-8) with photocatalytic degradation of formaldehyde and tunable structural color were designed for eco-friendly coatings by programmable smart manufacturing. As APC unit, H xh -ZIF-8 nanoparticles with controllable diameters were synthesized utilizing solvothermal method and the −N = C = O group was introduced with thermal oxidation. The results of photocatalytic degradation revealed that H 5h -ZIF-8, through thermal oxidation, exhibited a formaldehyde degradation rate 9.8 times than that of ZIF-8. The main reactive components in photocatalysis were holes (h + ) and superoxide radicals ( · O 2 – ), showcasing both stability and reproducibility. The color and brightness of the APC were adjusted by tuning the H xh -ZIF-8 diameter. The angle-independent APC ranging from red to purple were fabricated with 177, 165 and 235 nm H xh -ZIF-8 nanoparticles in various proportions with programmable smart manufacturing. In this study, a large-scale ZIF-8-based APC was designed with programmable smart manufacturing for environment-friendly coating, which combined environmental protection technology with structural color, and paved a new strategy for the development of multifunctional materials in air quality management.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2019
·Vol. 144
·期 12
·3892-3897
·
IF 4.019
Xiaobin Wang,Zhishan Fang,Zhuoyi Li,Wen Ying,Danke Chen,Haiping He,Xinsheng Peng
Mercury, as one of the most prevalent toxic metals released by various natural and anthropogenic processes, causes severe pollution of soil and groundwater. In this work, R-phycoerythrin (R-PE) proteins encapsulated into ZIF-8 composite thin films were prepared via a solid-confinement conversion process and applied as fluorescent sensors for mercury ion detection. The R-PE proteins encapsulated into ZIF-8 exhibit dual color emissions including green (518 nm) and red (602, 650 nm) fluorescence, while the original orange emission (578 nm) of pure R-PE is significantly suppressed. R-PE@ZIF-8 presents excellent selectivity and sensitivity for mercury detection in a large pH range without buffer solution. Under the optimal conditions, there is a good linear relationship between the fluorescence quenching efficiencies of R-PE@ZIF-8 and logarithmic concentrations of mercury ions in the range of 0.001–50 μM with the detection limit (LOD) of 6.7 nM much lower than the guideline value given by the World Health Organization. Furthermore, multi-peak detection of R-PE@ZIF-8 improves the detection accuracy of Hg2+ concentration.
研究领域:
环境科学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
Polymers
·
2018
·Vol. 11
·期 1
·27
·
IF 2.935
Yuxiao Feng,Le Zhong,Muhammad Bilal,Zhilei Tan,Ying Hou,Shiru Jia,Jiandong Cui
Zeolitic imidazole framework-8 (ZIF-8) with tunable pore sizes and high surface areas have recently emerged as a promising support for immobilizing enzymes. However, the instability in the aqueous acidic environment and difficulty of recovery has limited their practical applications in some cases. In this study, catalase/ZIF-8 composites with a protective nanocoating were prepared by the controlled self-assembly of silanes or coordination complexes (tannic acid (TA) and Fe3+). The properties of the catalase (CAT)/ZIF-8 composites with a protective nanocoating were also determined. The recovered activity of CAT/ZIF-8 and CAT/ZIF-8 with protective nanocoating was 70% and 65%, respectively. Compared with the conventional CAT/ZIF-8 composites, CAT/ZIF-8 with protective nanocoating exhibited excellent acid resistance. For example, after treatment for 60 min in phosphate buffer solution (pH 3.0), CAT/ZIF-8 composites only maintained 20% of their initial activity (about 12 U/mg). However, CAT/ZIF-8 with a protective nanocoating could still retain about 50% of its initial activity (about 10 U/mg). Meanwhile, the thermostability and storage stability of the CAT/ZIF-8 composites was enhanced significantly due to the presence of nanocoating compared with conventional CAT/ZIF-8. More importantly, the CAT/ZIF-8 with a protective nanocoating retained 40% of its initial activity after 7 cycles, whereas CAT/ZIF-8 only retained 8% of the initial activity. The approach in this study could be an efficient strategy to prepare enzyme/ZIF-8 composites with both high acid resistance and excellent recyclability.Keywords:enzyme/ZIF-8 nanocomposites;nanocoating;stability;acid resistance
研究领域:
生物化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）