JOURNAL OF CHEMICAL THERMODYNAMICS
·
2018
·
IF 2.631
Xue Wang,Dawei Shang,Shaojuan Zeng,Yuanming Wang,Xiaochun Zhang,Xiangping Zhang,Jindun Liu
Absorption and adsorption technology as widely used methods have been reported for carbon dioxide (CO 2 ) separation. In order to combine the advantages of absorption and adsorption methods, ionic liquids (ILs) as absorption function and zeolitic imidazolate framework-8 (ZIF-8) as adsorption function were integrated into a slurry to efficiently capture CO 2 by the absorption-adsorption method. In this study, two pyridinium-based ILs, [C 4 Py][NTf 2 ] and [C 4 Py][N(CN) 2 ] were synthesized, and mixed with different concentration of ZIF-8 to form hybrid slurries. CO 2 solubility in the different hybrid slurries at temperatures from 303.15 to 333.15 K was measured. The results indicated that CO 2 solubility increases significantly with increasing pressure and decreases with increasing temperature. Moreover, CO 2 solubility increases with the increase of ZIF-8 content, indicating that the addition of ZIF-8 into ILs can obviously enhance CO 2 solubility. CO 2 solubility in the ZIF-8/[C 4 Py][NTf 2 ] slurry increases by 24% compared with the corresponding pure IL at 303.15 K and 1.80 MPa. The absorption-adsorption mechanism was studied using FT-IR and NMR spectroscopy. It was demonstrated that CO 2 absorption and adsorption in the ZIF-8/ILs hybrid slurries is a physical process. Furthermore, the ZIF-8/[C 4 Py][NTf 2 ] slurry can also keep the stable absorption performance after five consecutive absorption and desorption cycles. Considering the excellent capacity, thermal stability and recyclability, the porous materials/ILs slurry will provide new insight to CO 2 capture compared with the conventional absorbents.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Li Yu,Wang Dan,Xu Guanchen,Qiao Li,Li Yong,Gong Hongyu,Shi Lei,Li Dongwei,Gao Meng,Liu Guoran,Zhang Jingjing,Wei Wenhui,Zhang Xingshuang,Liang Xiu
Air and water pollution poses a serious threat to public health and the ecological environment worldwide. Particulate matter (PM) is the major air pollutant, and its primary sources are processes that require high temperatures, such as fossil fuel combustion and vehicle exhaust. PM0.3 can penetrate and seriously harm the bronchi of the lungs, but it is difficult to remove PM0.3 due to its small size. Therefore, PM0.3 air filters that are highly efficient and resistant to high temperatures must be developed. Polyimide (PI) is an excellent polymer with a high temperature resistance and a good mechanical property. Air filters made from PI nanofibers have a high PM removal efficiency and a low air flow resistance. Herein, zeolitic imidazolate framework-8 (ZIF-8) was used to modify PI nanofibers to fabricate air filters with a high specific surface area and filtration efficiency. Compared with traditional PI membranes, the ZIF-8/PI multifunction nanofiber membranes achieved super-high filtration efficiency for ultrafine particles (PM0.3, 100%), and the pressure drop was only 63 Pa. The filtration mechanism of performance improvement caused by the introduction of ZIF-8/PI nanofiber membrane is explored. Moreover, the ZIF-8/PI nanofiber membranes exhibited excellent thermal stability (300 C) and efficient water–oil separation ability (99.85%).
研究领域:
环境科学
·
材料科学
·
空气污染控制
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Mengmeng Zhang,Kun Yang,Junshuo Cui,Haibiao Yu,Yuejiao Wang,Weijun Shan,Zhenning Lou,Ying Xiong
With the ever-increasing of Rare Earth Elements (REEs) in various high technology applications, efficient recovery of REEs from liquid sources is becoming significantly important. In this work, ZIF-8 and UiO-66-NH 2 (U6N) are combined to form a 3D-agaric like core-shell structure hybrid material (U6N@ZIF-8-20), which exhibits good performance in REEs extraction. Due to the abundant adsorption sites of ZIF-8 and the excellent water stability of UiO-66-NH 2 , 3D-agaric like U6N@ZIF-8-20 showed quick adsorption rate (only 10 min to reach equilibrium), high adsorption capacity and selectivity for REEs from water compared to other reported adsorbents. Maximum adsorption capacities of U6N@ZIF-8-20 for neodymium (Nd(III)), europium (Eu(III)), gadolinium (Gd(III)) and erbium (Er(III)) achieved to 249.90, 295.28, 316.22 and 340.95 mg g -1 , respectively. U6N@ZIF-8-20 has superiority in selective adsorption of REEs from Cd(II), Zn(II), Cu(II), Mn(II) and Co(II) coexistence solution. The order of adsorption capacities for REEs is in agreement with the order of their electronegativity, ionic radius and charge density. Moreover, U6N@ZIF-8-20 showed better water stability and recyclability than single MOF. Overall, MOF@MOF hybrid material has efficiency in REEs separation from solutions, and has great advantage in the application of wastewater treating.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Dan Zhang,Yue Zhao,Qi He,Kaixuan Feng,Zhi Hu,Guohong Ma,Zengxi Pan
Magnesium (Mg) alloys are susceptible to being attacked by corrosive ions in practical application environments, which limits their widespread application as the most promising engineering material. Herein, the superhydrophobic composite coating PVB/STA/ZIF-8@SiO 2 (PSZS) has been designed on the surface of Mg alloy by using a drop coating method to improve its corrosion resistance. In this study, we provide an approachable decoration strategy for hydrophobic and hierarchical modification of zeolite imidazolate frameworks (ZIF-8) with stearic acid (STA) and SiO 2 , and combined with polyvinyl butyral (PVB) to form a composite coating with excellent performance on the substrate surface. Notably, the PSZS composite coating exhibited superhydrophobic and the contact angle is greater than 150° after 300 cm of mechanical friction. The electrochemical testing of the PSZS composite coating indicated that it greatly protected the Mg alloys from corrosion. Moreover, the PSZS coating displayed highly effective corrosion resistance even after being immersed in 3.5 wt% NaCl aqueous solution for 7 days. Overall, the PSZS composite coating with the advantages of corrosion resistance, corrosion durability, superhydrophobic, abrasion resistance and simple preparation process broadens the horizons of Mg alloy corrosion resistance research.
研究领域:
材料科学
·
腐蚀与防护
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2021
·
IF 5.268
Xiaoyan Yang,Huihui Chai,Lingli Guo,Ying Jiang,Liqun Xu,Wei Huang,Yijun Shen,Ling Yu,Yingshuai Liu,Jing Liu
Poly-ether-ether-ketone (PEEK) is a promising material in oral repair and orthopedic implantation field due to its stability and proper elastic modulus. However, the lack of simple but effective strategy to functionalize PEEK and improve its antibacterial function hinders its further biomedical application. In this study, a sulfonated 3D porous PEEK is fabricated via sulfonation treatment, and then decorated with the in situ synthesized zeolitic imidazolate framework-8 (ZIF-8), in which Ag + ions were loaded with high loading capacity. Surface morphology, roughness, chemical composition and hydrophilicity of all the substrates were evaluated in details, suggesting Ag + ions loaded ZIF-8 on sulfonated PEEK (SPZA) was successfully prepared. The antibacterial activity of pristine and functionalized PEEK was evaluated by inhibition zone test, spread plate assay, growth curve, and morphology of bacteria. Experimental results demonstrate that the SPZA has effectively bacteriostatic performance against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ). The excellent antimicrobial activity is attributed to the synergistic effect of Ag + and Zn 2+ ions released continuously from SPZA. This work provides a promising route for surface modification of PEEK and offer a potential candidate for biomedical implants.
研究领域:
材料科学
·
生物医学工程
·
微生物学
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 14
·9996-10003
·
IF 3.9
Zijie Wei,Cuifeng Jiang,Jinshan Wang,Yue Chen
Metal organic framework (MOF)-derived nanostructures display remarkable characteristics and have broad application potential. Os@ZIF-8 nanocomposites were prepared by a depositional method. The Os nanoparticles distributed on the surface of ZIF-8. The nanocomposites displayed enhanced peroxidase-like activity with smaller Km for both 3,3′,5,5′-tetramethylbenzidine (TMB) and H2O2 compared to Os NPs due to the confinement effect and large surface area that ZIF-8 provided. From the average reaction rate constants obtained from three different temperatures, the activation energy values were determined. The kinetic data indicated that the Os@ZIF-8 NCs are catalytically more active than Os NPs. In addition, quantitative measurement of Hg2+ was performed based on the formation of Os–Hg alloy. Os@ZIF-8 NCs had a wide detection range between 0 μM and 71.43 μM for Hg2+ with a limit of detection (LOD) of 2.29 μM. Using a MOF with a large surface area to load Os nanoparticles to achieve enhanced nanozyme activity is the novelty of this work.
研究领域:
材料科学
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Zihao Li,Zuozhu Yin,Wenbo Xiao,Yuhua Chen,Chenggang Yang,Yidan Luo,Zhen Hong,Mingshan Xue
Given the increasing contamination of freshwater supplies, it is essential to effectively treat industrial wastewater. However, treating industrial wastewater using a single method is challenging due to the presence of complex contaminants like petroleum, organic dyes, bacteria, and other complex contaminants. In this study, we present a straightforward and scalable approach to prepare multifunctional nanocellulose-based membranes (NM) that exhibit superhydrophobicity, self-cleaning, oil/water separation, photocatalysis, and anti-bioadhesion properties. To begin with, we created NM by extruding fiber slurry onto a stencil and drying it. Next, we built a polyurethane (PU)/ZIF‐8/1H, 1H, 2H, 2H‐perfluorooctyltriethoxysilane (POTS)-based superhydrophobic layer by spraying it over the NM's surface. By employing the aforementioned processes, we successfully integrated multiple functions into a single superhydrophobic NM. Our results demonstrate that the NM-PU/ZIF-8/POTS membrane exhibits superior hydrophobicity performance, with a high-water contact angle (166.8 ± 0.8°) and a low rolling angle (5 ± 0.3°). Moreover, these samples retain high-water contact angles and low rolling angles even in harsh environments such as acid and alkali solutions, high temperatures, abrasion resistance, UV aging resistance, bending and folding, tape peeling, and self-cleaning. The NM-PU/ZIF-8/POTS membrane also exhibits high and stable oil-water separation performance, with a separation efficiency of 94.6% and a relatively high separation flux (133.2 L·m −2 ·h −1 ). At the same time, the NM-PU/ZIF-8/POTS membrane exhibits water-in-oil emulsion separation ability. The membrane’s stability, effectiveness, and reusability were demonstrated through ten repetitions of degradation experiments using aqueous methylene blue solution, with the NM-PU/ZIF-8/POTS membrane exhibiting an excellent degradation rate (>94%). Finally, the bioadhesion resistance test indicated a reduction of 69.1% in the adhesion rate of the NM-PU/ZIF-8/POTS membrane. Overall, the creation of the NM-PU/ZIF-8/POTS membrane serves as a useful inspiration for the practical application of superhydrophobic NM in multifunctional integration, while also broadening the scope of membrane applications.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2016
·Vol. 12
·期 1
·110-120
·
IF 0.728
Jianwei Yuan,Qianqian Li,Jie Shen,Kang Huang,Gongping Liu,Jing Zhao,Jingui Duan,Wanqin Jin
It is still a great challenge to prepare high performance mixed matrix membranes (MMMs) because of the difficulty in finely tuning the compatibility between filler and organic phases. In this work, ZIF-8 nanoparticles hydrophobically functionalized by 5, 6-dimethylbenzimidazole (DMBIM) via shell ligand exchange (SLE) reaction were incorporated into polydimethylsiloxane (PDMS) matrix to fabricate defect-free MMMs. Organic-–inorganic interface compatibility was realized because of more abundant organic ligands from DMBIM. The effects of different loadings on membrane microstructure and gas separation performance were investigated systematically. A significantly enhanced C 3 H 8 /N 2 separation performance with C 3 H 8 permeability over 2.10 × 10 4 Barrer (91 % higher than that of pure PDMS membrane) and C 3 H 8 /N 2 selectivity of 99.5 (116 % higher than that of pure PDMS membrane) were achieved. Additionally, the as-prepared membrane also exhibited excellent stability during long term operation. © 2016 Curtin University of Technology and John Wiley & Sons, Ltd.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Yun-Fei Xia,Bo Liu,Pan Guo,Feng-Di Tu,Li-Xiao Shen,Miao Ma,Yun-Kun Dai,Jing Liu,Bin Xu,Yun-Long Zhang,Lei Zhao,Yan Wang,Zhen-Bo Wang
ZIF-8 derived carbons demonstrate admirable application prospects in electrocatalytic fields, while ZnN x remaining in those materials are overlooked, crippling the validity of theoretic studies in researches. Herein, the residual Zn in ZIF-8 derived carbons are found could exceed 10 wt% even at carbonization temperatures over 900℃, and Zn-NCs with various Zn contents are adopted as supports to synthesize low-platinum ORR catalysts. Substantial characterizations manifest that ZnN x in Zn-NC can not only provide Zn source for L1 0 -PtZn intermetallic, but act as ‘spatial barriers’ to prevent the formation of inactive PtN x , elevating the active Pt proportion in catalyst by ∼104%. The resultant Zn-NC-Ar-PtZn exhibits a mass activity of 0.557 mA/g Pt and a peak density of 1.485 W/cm 2 . DFT calculations show the strong thermodynamic tendency of forming PtN 4 without the protection of ZnN 4 , and the superior durability and activity of Zn-NC-Ar-PtZn should be attributed to its Zn-derived ligand effects and the SMSI.
研究领域:
材料科学
·
电化学
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 3.7
Xiaoqian Peng,Shaojun Liu,Jing Zhang,Xu Zhang,Xiaochan Liu,Zhipeng Yuan,Guoran Liu,Xibin Yi,Serguei Filatov
It is well known that adsorbent material is the key to determine the CO 2 adsorption performance. Herein, ZIF-8 derived porous carbon (ZIF-8-C) is anchored into the framework of a novel composite aerogel (ZCPx), which utilizes chitosan (CS) and polyvinyl alcohol (PVA) as raw materials. By controlling the ratio of ZIF-8-C, the developed hierarchical porous structures combine the advantages of micropores, mesopores, and macropores. Besides, the ligand material of ZIF-8-C and the amino group from CS are two sources of the high nitrogen content of ZCPx. The optimized sample ZCP4 shows a high nitrogen content of 6.78 %, which can create more active centers and supply basic sites, thereby enhancing the CO 2 adsorption capacity. Moreover, ZCP4 composite aerogel presents a CO 2 adsorption capacity of 2.26 mmol·g −1 (298 K, 1 bar (equivalent to 100 kPa)) and CO 2 /N 2 selectivity (S CO2/N2 ) can reach 20.02, and the dynamic breakthrough experiment is performed to confirm the feasibility of CO 2 /N 2 actual separation performance, proving that the composite aerogel is potential candidates for CO 2 adsorption.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Zhangxu Chen,Fanli Meng,Qihong Cai,Minglian Fu,Danchen Zhu
To solve the problem of ofloxacin pollution in contaminated water, Fe3O4 and ZIF-8 were prepared by a solvothermal method and stirring at normal temperature, respectively. Furthermore, a series of magnetic ZIF-8/reduced graphene oxide (Fe3O4/ZIF-8/rGO) composite aerogels with different mass ratios were synthesized by reduction and freeze-drying methods. The products were characterized using a Fourier transform infrared spectrometer, an X-ray diffractometer, a field emission scanning electron microscope, and a thermogravimetric analyzer. Taking ofloxacin (OFL) as the target pollutant, an orthogonal test was carried out to explore the optimum conditions for removing ofloxacin with the composite aerogel: under the conditions of an illumination time of 8.0 h, a mass ratio of 10 : 15 : 20 for Fe3O4/ZIF-8/rGO, a composite aerogel dosage of 8 mg, and an initial concentration of ofloxacin of 50 mg L−1, the removal rate of ofloxacin reached 98.87%. After being recycled five times, the removal rate remained at 90.23%. The prepared Fe3O4/ZIF-8/rGO composite aerogel and the developed ofloxacin removal procedure could provide a reference for the treatment of quinolone antibiotics and PPCPs in polluted water. Moreover, they can be expected to alleviate the energy crisis and enhance the application of solar energy to deal with environmental remediation in the future.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2017
·Vol. 32
·期 2
·e4062
·
IF 2.319
Bibimaryam Mousavi,Somboon Chaemchuen,Chizoba I. Ezugwu,Ye Yuan,Francis Verpoort
We demonstrate the synthesis of isostructural zeolitic imidazole framework (ZIF-8) using four distinct synthetic methods. Subsequently, the variations in physicochemical properties were analyzed through the catalytic reaction of CO 2 cycloaddition of epoxide. It was thus demonstrated that simply by changing the type of synthetic method for the preparation of ZIF-8, the physicochemical properties were changed significantly which in turn influenced the catalytic activity of ZIF-8. It was found that the synthetic method affected the crystal growth and consequently influenced the physicochemical properties which are crucial aspects in metal–organic framework applications. There is an almost exponential relationship between the reactivity of various ZIF-8 samples in CO 2 cycloaddition of epoxide and the surface area, CO 2 adsorption and pore volume.
研究领域:
材料科学
·
催化化学
✓ 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）