MATERIALS RESEARCH BULLETIN
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2021
·
IF 4.641
Summaira Saghir,Zhenggang Xiao
ZIF-8 nanoparticles were prepared through the simple and facile method at room temperature and subsequently applied for the simultaneous adsorption of two antibiotics, tetracycline (TC) and minocycline (MC). The prepared ZIF-8 exhibits regular rhombic dodecahedron having meso and macropores structure with a specific surface area of 1516.06 (m²/g), indicating that ZIF-8 could be an ideal adsorbent material for the adsorption of antibiotics. Moreover, the adsorption conditions were optimized in detail. All the characterizations of ZIF-8 after adsorption reveal the successful adsorption of TC and MC on ZIF-8. The adsorption kinetics and isothermal data of both antibiotics fitted well with the pseudo second order and Langmuir isotherm model. The adsorption behaviour of TC and MC on ZIF-8 was based mainly on electrostatics and π - π stacking interactions. This study revealed that ZIF-8 could be used as a useful adsorbent in treating wastewater contaminated with multiple antibiotics.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Membranes
·
2022
·Vol. 12
·期 2
·122
·
IF 4.562
Tong Li,Yuhong Wang,Xinyan Wang,Caixia Cheng,Kaifeng Zhang,Jie Yang,Guangshuo Han,Zhongpeng Wang,Xiuju Wang,Liguo Wang
Forward osmosis membranes have a wide range of applications in the field of water treatment. However, the application of seawater desalination is restricted, so the research of forward osmosis membranes for seawater desalination poses new challenges. In this study, zeolitic imidazolate framework-8 (ZIF-8) was synthesized by a mechanical stirring method, and its crystal structure, surface morphology, functional group characteristics, thermochemical stability, pore size distribution and specific surface area were analyzed. The cellulose acetate (CA)/ZIF-8 mixed matrix forward osmosis membrane was prepared by using the synthesized ZIF-8 as a modified additive. The effects of the additive ZIF-8 content, coagulation bath temperature, mixing temperature and heat treatment temperature on the properties of the CA/ZIF-8 forward osmosis membrane were systematically studied, and the causes were analyzed to determine the best membrane preparation parameters. The structure of the CA membrane and CA/ZIF-8 mixed matrix forward osmosis membranes prepared under the optimal conditions were characterized by Fourier Transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), contact angle and Atomic force microscope (AFM). Finally, the properties of the HTI membrane (Membrane manufactured by Hydration Technology Innovations Inc.), CA forward osmosis membrane and CA/ZIF-8 mixed matrix forward osmosis membrane were compared under laboratory conditions. For the CA membrane, the water flux and reverse salt flux reached 48.85 L·m−2·h−1and 3.4 g·m−2·h−1, respectively. The reverse salt flux and water flux of the CA/ZIF-8 membrane are 2.84 g·m−2·h−1and 50.14 L·m−2·h−1, respectively. ZIF-8 has a promising application in seawater desalination.Keywords:desalination;ZIF-8;forward osmosis membranes
研究领域:
材料科学
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环境工程
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产品关联
DOI
PubMed
高影响因子
ChemNanoMat
·
2023
·Vol. 9
·期 7
·e202300073
·
IF 3.8
Lingling Xia,Yucen Li,Jiwei Cui,Ming Hu
Graphical Hollow ZIF-8 was embedded with polyphenol networks and polyethylene glycol networks. The double networks enhanced the stability of the hollow ZIF-8, showing promise in water treatment both by adsorption and photocatalysis. Hollow ZIF-8 particles are promising materials for water treatment because of the high porosity and catalytic activities under photon irradiation. However, hollow ZIF-8 particles can easily degrade under harsh conditions due to the weak stability. Here, we synthesize hollow ZIF-8 particles with polyphenol and polyethylene glycol networks embedded. The multiple interactions among the ZIF-8 frameworks and the networks increase the mechanical and chemical stability of the hollow ZIF-8 particles as suggested by a series of spectra. Uptake of methylene blue about 128 mg/g by the hollow particles is realized. Furthermore, hydroxyl or superoxide radicals for degradation of the adsorbed methylene blue are effectively generated through irradiation of the hollow ZIF-8 particles. In a water treatment test, the model pollute with a concentration of 50 mg/L is completely removed within half an hour. The performance of the recycled hollow ZIF-8 particles is proved to be significant, indicating the practical potential of the material.
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
Natural Product Communications
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2020
·
IF 0.468
Jin Shao,Tong Zhao,Hui-Ping Ma,Zheng-Ping Jia,Lin-Lin Jing
It was reported that 8-hydroxygenistein (8-OHG) was synthesized by methylation, bromination, methoxylation, and demethylation using cheap and readily available biochanin A as raw material. All synthesized products were structurally confirmed by ultra-high-performance liquid chromatography (UHPLC), infrared spectroscopy, mass spectrometry, 1H-nuclear magnetic resonance (NMR), and 13C-NMR. In addition, we examined the antioxidant capacity of 8-OHG using 6 different methods such as 1,1-diphenyl-2-picrylhydrazyl radical scavenging, 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonate) radical (ABTS) scavenging, nitric oxide radical (NO) scavenging, superoxide radical (O2 −•) scavenging, reducing power assay, and total antioxidant activity using ascorbic acid (VC) as a positive control. Compared with VC, 8-OHG exhibited higher total antioxidant activity and stronger scavenging activity on ABTS, NO, and O2 −•. These results indicate that 8-OHG is an excellent antioxidant agent and may be effective in preventing damage induced by free radical.
研究领域:
有机化学
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药理学
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植物化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Peiqing Zhang,Sihang Li,Fan Xiao,Yongfang Xiao,Yi Zhang,Zhongguo Shan,Zhenyu Li,Haihua Wang
Membrane distillation (MD) represents a promising advance in wastewater purification, contributing to the mitigation of water scarcity. Hydrophobic poly(vinylidene fluoride) (PVDF) microporous membrane is susceptible to wetting by low surface tension substances, leading to fouling. To address this, PVDF membrane was superhydrophobically modified using modified ZIF-8 to obtain two composite membranes, AZ/PVDF and Z@C/PVDF. AZ/PVDF and Z@C/PVDF composite membranes were prepared by coating more dispersible APTES-ZIF-8 and ZIF-8@MWCNT, respectively, onto the surface of PVDF membrane. The hydrophobicity of the composite membranes was regulated by silane types, fluorination methods, and fluorination time, resulting in reduced surface roughness and increased surface energy. The contact angles of AZ/PVDF and Z@C/PVDF were 154.2 ± 3.4° and 156.8 ± 4.2°, respectively. Both AZ/PVDF and Z@C/PVDF membranes demonstrated outstanding mechanical, thermal, and chemical stability. AZ/PVDF and Z@C/PVDF membranes outperformed PVDF membrane, extending operation times by 2 h and 3 h, respectively, without obvious NaCl crystals. Furthermore, Z@C/PVDF membrane exhibited superior resistance to wetting by SDS than AZ/PVDF and PVDF membranes, treating pickle brine via the direct contact MD (DCMD) process with a recovery rate of 30.2 % within 10 h. Overall, this research offers a promising approach to fabricating superhydrophobic composite membranes for high-salt brine treatment via DCMD.
研究领域:
化学工程
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材料科学
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环境工程
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纳米技术
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2018
·Vol. 19
·期 5
·1424
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IF 3.687
Miaad Adnan,Kai Li,Jianhua Wang,Li Xu,Yunjun Yan
A hierarchical mesoporous zeolitic imidazolate framework (ZIF-8) was processed based on cetyltrimethylammonium bromide (CTAB) as a morphological regulating agent and amino acid (l-histidine) as assisting template agent.Burkholderia cepacialipase (BCL) was successfully immobilized by ZIF-8 as the carrier via an adsorption method (BCL-ZIF-8). The immobilized lipase (BCL) showed utmost activity recovery up to 1279%, a 12-fold boost in its free counterpart. BCL-ZIF-8 was used as a biocatalyst in the transesterification reaction for the production of biodiesel with 93.4% yield. There was no significant lowering of conversion yield relative to original activity for BCL-ZIF-8 when continuously reused for eight cycles. This work provides a new outlook for biotechnological importance by immobilizing lipase on the hybrid catalyst (ZIF-8) and opens the door for its uses in the industrial field.Keywords:adsorption method;biodiesel production;Burkholderia cepacialipase (BCL);hexahedral ZIF-8;hierarchical ZIF-8;surfactant
研究领域:
生物技术
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催化化学
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可再生能源
✓ 已验证
DOI
PubMed
高影响因子
ANALYTICAL LETTERS
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2020
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IF 1.467
Yufeng Hu,Junpeng Zhang,Gang Li,Hanwen Xing,Minghuo Wu
Chromium (VI) [Cr(VI)] is considered to be a serious environmental pollutant because of its highly carcinogenic and mutagenic properties. In this study, we fabricated fluorescent probes for Cr(VI) detection by encapsulating cadmium telluride quantum dots (CdTe QDs) into zeolitic imidazolate framework-8 (ZIF-8). The obtained composites, designated as CdTe QDs@ZIF-8, were able to sense Cr(VI) through the combined action of fluorescence dynamic and static quenching. Under the optimum conditions, the obtained CdTe QDs@ZIF-8 composites showed high selectivity and sensitivity toward Cr(VI). The fluorescence intensity of the CdTe QDs@ZIF-8 composites decreased as the concentration of Cr(VI) increased across from the range of 2.5 to 40 μM with a detection limit of 0.06 μM. The CdTe QDs@ZIF-8 composites were successfully applied to determine Cr(VI) in tap water and seawater samples; the average recoveries of Cr(VI) at different spiking concentration levels ranged from 94.0% to 104.1% with relative standard deviations below 4.8%. This work provides a novel fluorescent detection method for Cr(VI) and discrimination between Cr(VI) and Cr(III), which can be used for rapid recognition and determination of Cr(VI) in complex matrices.
研究领域:
环境科学
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分析化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Changdie Cao,Yali Zhao,Yurun Dai,Yanying Wei,Qibin Xia,Haihui Wang
Sulphur hexafluoride (SF 6 ) is a commonly utilized insulation gas in electrical equipment because to its superior insulating capabilities and arc extinguishing characteristics, which holds high recycling value and necessity from the economic and environmental perspective. However, traditional method of recovering SF 6 based on cryogenic distillation is energy consuming, alternative separation technic is urgently required. Herein, a variety of ZIF-8 membranes fabricated via fast current-driven synthesis are proposed for N 2 /SF 6 separation. For a typical insulation gas in gas insulated switchgear comprising 70 % N 2 and 30 % SF 6 , the ZIF-8 membrane presents a N 2 /SF 6 selectivity up to 809 and a high N 2 permeance of 557 GPU with outstanding pressure resistance, which indicates that the ZIF-8 membrane separation would be an excellent new route for highly efficient SF 6 recovery.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2021
·Vol. 329
·期 2
·1011-1017
·
IF 1.371
Ma Yu,Dou Weixin,Yang Weiting,Yang Weikang,Pan Qinhe
Recently, highly porous metal–organic frameworks (MOFs), with excellent porosity and abundant functional groups, have represented a new addition to the area of capturing uranium ion pollutants. To achieve high adsorption capacity and removal efficiency of uranium, it is significant to modify the morphology of MOF-based adsorbents. In this contribution, two hollow structured ZIF-8 adsorbents were used for the adsorptive separation of uranium from aqueous solution. Both of them showed faster adsorption rate and larger adsorption capacity than pristine ZIF-8, providing the prospect of hollow MOF materials to the application of uranium extraction.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
COMPOSITES COMMUNICATIONS
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2019
·
IF 0
Bin Yang,Xueyao Ding,Meiyun Zhang,Lin Wang,Xu Huang
A feasible strategy by incorporation of zeolitic imidazolate framework-8 (ZIF-8) nanocrystals on aramid nanofibers (ANFs) to prepare a flexible, strong, water-resistant ZIF-8/ANFs composite nanopaper with excellent gas adsorption capacity and good thermal stability was proposed. The morphologies, bonding behaviors between ZIF-8 and ANFs, gas adsorption capacity, thermal stability, mechanical properties and water resistance of the composite nanopaper were investigated. The result shows that the in situ synthesis of ZIF-8 nanocrystals in ANFs/DMSO solution could improve the bonding states and distribution homogeneity of ZIF-8 nanocrystals. The flexible ZIF-8/ANFs composite nanopaper exhibits excellent adsorption capability (specific surface area of 246.2 m 2 /g, total pore volumes of 0.106 cm 3 /g and 79.1 cm 3 /g of nitrogen adsorption quantity at relative pressure of 0.55), favorable water resistance (remains tensile strength after soaking in water for 48 h), impressive thermal stability (initial decomposition temperature of 485 °C), which is beneficial to broaden the application of ANFs in gas adsorption and separation field used in harsh conditions such as high temperature and humid environment.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Wei Yang,Yudi Kong,Hong Yin,Mingli Cao
Water pollution caused by severe heavy metal contamination poses a significant threat to freshwater resources and aquatic ecosystems, necessitating effective removal strategies. This study focuses on the synthesis of highly crystalline ZIF-8 particles using an energy-efficient, cost-effective in-situ self-assembly method. The resulting particles exhibit exceptional specific surface area (1663.413 m 2 /g) and particle sizes ranging from approximately 60 to 80 nm. We conducted batch adsorption experiments using Cu(II) and Pb(II) solutions as representative models of water pollution to evaluate ZIF-8's adsorption capacity for these heavy metal ions . Remarkably, ZIF-8 demonstrated a significantly higher maximum adsorption capacity for Cu(II) (378.5 mg/g) compared to Pb(II) (92.74 mg/g) under identical experimental conditions. By employing adsorption kinetics and isotherm models, as well as density functional theory calculations, we elucidated that Cu(II) removal from water by ZIF-8 relies on ion exchange and coordination interactions, whereas Pb(II) elimination primarily occurs through surface adsorption due to ZIF-8's elevated micropore structure and specific surface area. Moreover, we proposed a sustainable solution by solidifying the waste ZIF-8 adsorbent into cement-based materials, offering an innovative and environmentally friendly alternative to landfill disposal. This methodology not only demonstrates noteworthy economic effectiveness but also ensures harm-free treatment and repurposing of waste adsorbents, providing valuable insights into secure and sustainable heavy metal removal strategies.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Water Cycle
·
2025
·
IF 8.7
Xiaobin Zhou,Chenyu Zhou,Min Huang,Yingxue Wang,Mengxin Zhao,Yanan Zhang,Yinming Fan,Yinian Zhu,Zongqiang Zhu
Nano zero-valent iron (nZVI) has garnered significant attention as an excellent environmental remediation material for Cr(Ⅵ) adsorption. However, its practical utilization is significantly impeded by inherent limitations, notably its propensity for aggregation and susceptibility to oxidation. This study proposed an innovative approach that using zeolite imidazole framework-8 (ZIF-8) as a cladding material for encapsulating nZVI particles. This encapsulation served to safeguard nZVI from oxidation and agglomeration. Furthermore, the ZIF-8 coating possessed suitable pore channels, allowing the migration of Cr(VI) ions towards the nZVI’s surface, thereby enabling efficient reduction. The ZIF-8-coated nZVI composite (ZIF-8@nZVI) achieved a remarkable Cr(VI) removal efficiency of 98.43% under the optimized conditions. After 10 days of exposure in the aqueous solution, the efficiency remained above 84%. The uptake of Cr(VI) by ZIF-8@nZVI proceeded via a chemisorption pathway, inherently spontaneous and endothermic in character. The mechanism analysis indicated that ZIF-8 and nZVI exhibited synergistic enhancement effect on Cr(VI) removal. The protonated nitrogen groups within ZIF-8 facilitated the swift diffusion of negatively charged Cr(VI) ions to the surface of ZIF-8@nZVI. Once adsorbed, Cr(VI) was directly reduced to Cr(III) by Fe 0 , which in turn underwent oxidation to Fe(II)/Fe(III). Notably, Fe(II) indirectly reduced Cr(VI) to Cr(III), while itself being oxidized to Fe(III). Consequently, the resulting Cr(III) ions co-precipitated with Fe(III), forming hydroxide complexes that were eliminated from the aqueous environment. Overall, this research demonstrated the practicability of employing ZIF-8 as a coating material to develop highly efficient nZVI-based adsorbents and highlighted the potential of ZIF-8@nZVI in addressing Cr(VI) contamination challenges.
研究领域:
环境修复
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）