CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhenda Liang,Haiqing Wang,Kena Zhang,Ge Ma,Lishan Zhu,Li Zhou,Bing Yan
Low-cost MnO 2 has been vigorously investigated in the field of catalysis. However, high amount of MnO 2 usually needs to be used in the disinfection process owing to their low photocatalytic activity. In this work, modification of MnO 2 with zeolitic imidazole framework-8 (ZIF-8) for improving the photocatalytic bactericidal performance was explored for the first time. Specifically, MnO 2 /ZIF-8 exhibited complete inactivation of multi-drug resistant Escherichia coli ( E. coli) at a low concentration (3.24 μg/mL) with simulated solar irradiation. The 1 O 2 rather than O 2 − or OH was identified as the major reactive species for the bacterial inactivation. Mechanistic studies indicated that the superior bactericidal property of MnO 2 /ZIF-8 than the pristine material could be ascribed to the increased surface oxygen vacancies (OVs) amount and an inhibited electron and hole recombination. This study provides a novel type of photocatalyst for antibacterial application and may shed light on designing MnO 2 based low-cost nanocomposites with photocatalytic bactericidal capability for the practical water disinfection treatment.
研究领域:
环境科学
·
材料科学
·
微生物学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jinrong He,Wei Qu,Yun Feng,Jinrui Jiang,Jiaming Luo,Yuzhang Wu,Limin Peng
Melamine-impregnated paper, a decorative material in furniture and interior design, could potentially impede the spread of indoor bacteria if it possesses antibacterial properties. Here, nano Ag-doped ZIF-8 (Ag@ZIF-8) was synthesized using ion exchange and in-situ chemical reduction strategies, followed by incorporating it into melamine-impregnated paper. The ion exchange mechanism of Zn 2+ and Ag + during ion exchange reactions was investigated. The structure of Ag@ZIF-8 was well-defined, with Ag nanoparticles evenly distributed on the surface of ZIF-8. Ag@ZIF-8 showed good thermal stability at 400 °C, meeting the requirements for the hot-pressing process of the melamine-impregnated paper. Ag@ZIF-8 exhibited enhanced ROS generation under visible light compare to ZIF-8, which was attributed to its reinforced light absorption and charge carrier separation facilitated by the localized surface plasmon resonance (LSPR) effect. The antibacterial activity of Ag@ZIF-8 was better than ZIF-8, owing to the multiple-synergistic antibacterial mechanisms of the ion release and ROS generation. Specifically, the 10-Ag@ZIF-8 exhibited MIC of 128 μg/mL and 64 μg/mL against E. coli and S. aureus , respectively. The signal intensity of •O 2 − induced by 10-Ag@ZIF-8 was 4.38 times higher than that of ZIF-8. As the addition of Ag@ZIF-8 increased, the antibacterial performance of melamine-impregnated paper improved. Considering the antibacterial property and economy of melamine-impregnated paper, 0.20 wt% was the optimal amount for 10-Ag@ZIF-8 decorated blockboard. This study proposes a novel approach for synthesizing MOF-based melamine-impregnated paper with antibacterial properties, aiming to reduce bacterial spread, minimize disease risks, and contribute to lowering overall healthcare costs.
研究领域:
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 13
·2523
·
IF 4.967
Hui Sun,Jiangli Feng,Yaoyao Song,Lei Xu,Xiaogang Cui,Bin Yu
The zeolitic imidazolate framework (ZIF−8)@polyacrylonitrile (PAN) nanofiber membrane was prepared and carbonized for heavy metal cadmium ion (Cd2+) adsorption in aqueous medium. Zinc oxide (ZnO) was first sputtered onto the surface of the PAN electrospun nanofiber membrane to provide a metal ion source. Then, the ZIF−8@PAN nanofiber membrane was prepared via in situ solvothermal reaction and carbonized in a tube furnace at 900 °C under a N2atmosphere to enhance adsorption performance. The synthesized ZIF−8 particles with polyhedral structure were uniformly immobilized on the surface of the PAN electrospun nanofiber membrane. After being heated at 900 °C, the polygonal ZIF−8 shrank, and the carbonized ZIF−8@PAN nanofiber membrane was obtained. Compared with the nanofiber membrane without being carbonized, the adsorption capacity of the carbonized ZIF−8@PAN nanofiber membrane reached 102 mg L−1, and its Cd2+adsorption efficiency could be more than 90% under the adsorption temperature of 35 °C and solution of pH = 7.5 conditions. According to the adsorption thermodynamics analysis, the Cd2+adsorption process of the carbonized ZIF−8@PAN nanofiber membrane was spontaneous. The whole Cd2+adsorption process was more suitably described by the pseudo second-order adsorption kinetics model, indicating that there exists a chemical adsorption mechanism besides physical adsorption.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Baohui Ren,Yanning Chen,Yanqiang Li,Weijin Li,Shuiying Gao,Hongfang Li,Rong Cao
The unique porous characteristic of metal-organic frameworks (MOFs) has been attracting significant attention for gas storage, catalysis and drug delivery. However, the studies regarding loading inhibitors into MOFs for metallic anti-corrosion applications are scarcely reported. Herein, a strategy based on encapsulating corrosion inhibitors into MOFs matrix has been developed, and their corrosion process and mechanism have been fully studied. Specifically, an environmentally friendly green corrosion inhibitor, zinc gluconate (ZnG), was selected as a metal resource for the preparation of ZIF-8 and then inherently intercalated into the porous ZIF-8. Various characterizations were carried out to confirm that zinc gluconate was successfully loaded into the ZIF-8 matrix. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization curves show the evidence that the prepared ZnG@ZIF-8/EP coatings display good metallic anti-corrosion performances. The probably protecting mechanism of ZnG@ZIF/EP coatings for magnesium alloy surface was thoroughly discussed.
研究领域:
材料科学
·
腐蚀与防护
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Yebin Guan,Juanjuan Shi,Ming Xia,Jun Zhang,Zhenfeng Pang,Alessandro Marchetti,Xiaohong Wang,Jingsong Cai,Xueqian Kong
Monodispersed zeolitic imidazolate frameworks (ZIFs) were prepared with a simple method using dimethylsulfoxide (DMSO) as solvent. This method yields ZIF-8 nanoparticles with a narrow particle size distribution of 90–110 nm and the dispersion is highly stable against agglomeration. These particles have larger nanosized porosity and enhanced CO 2 adsorption capability compared to ZIF-8 prepared with different solvents such as methanol or N , N -dimethyl formamide. Their uniform size and surface chemistry also lead to superior performance in the Knoevenagel condensation reactions. The ZIF-8 nanoparticles possess high thermal stability up to 550 °C and the preparation steps are easy for scaling up which are favorable for industrial applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 7
·4408-4416
·
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.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Lei Wang,Wenjing Zhi,Dongsheng Lian,Yu Wang,Juan Han,Yun Wang
Zeolitic imidazolate framework-8 (ZIF-8) has been successfully employed as a protective coating to encapsulate enzyme via various immobilization strategies by recent works. However, in all of the research, ZIF-8 only acts as the enzyme-immobilization matrix. In this work, by exploiting the fluorescence quenching properties of the ZIF-8 surface, we for the first time properly amalgamated the basic functionalities of ZIF-8 for horseradish peroxidise (HRP) encapsulation and fluorescence quencher by constructing HRP@ZIF-8/DNA hybrids and gave the successive detection of Hg2+ and phenol. Specifically, we introduced a biomimetic mineralization approach for facile encapsulation of HRP by ZIF-8 with high HRP-encapsulation efficiency (98.4%). Indeed, the HRP@ZIF-8 biocomposite functioned as an active biocatalyst under biologically challenging conditions, such as alkaline condition, high temperature, organic solvent, long-term storage, and continuous operation. After addition of FAM-labeled single-stranded DNA (ssDNA), the HRP@ZIF-8/DNA hybrid system could achieve rapid, specific, and sensitive detection of Hg2+ with a detection limit as low as 0.22 nM. Subsequently, benefiting from excellent catalytic activity of as-obtained HRP@ZIF-8 biocomposite, which could be successively utilized as a colorimetric sensor for sensitive measurement of phenol in micromolar level. It is believed that our strategy provides a convenient and efficient method for functionality integration of ZIF-8 without any complex modification. To the field of biosensing, our discovery broadens up the potential of bio-ZIF-8 composite for successive detection of two pollutants.
研究领域:
材料科学
·
生物化学
·
纳米技术
·
环境科学
✓ 已验证
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2017
·Vol. 122
·期 1
·357-367
·
IF 1.264
Wu Shuxiang,Wang Wenhang,Fang Yuzhen,Kong Xiangjin,Liu Junhai
Silicotungstic acid (STA) modified ZIF-8 catalyst was developed by simple impregnation method for Friedel–Craft acylation reaction. The best performance was observed on 20 wt% STA/ZIF-8, over which conversion of anisole and selectivity towards p-benzoylanisole reached 99.2 and 93.5%, respectively. N 2 physisorption, XRD, FT-IR, TGA and Pyridine FT-IR characterizations indicated that introduction of STA to ZIF-8 did not change its main structure but increased its acid site density, which promised enhanced catalytic performance of the obtained catalyst. Moreover, the performance of the catalyst was further proved through a series of substrates with electron donor or withdraw substitution group, since all of substrates could be converted to corresponding p-isomer effectively.
研究领域:
化学
·
催化科学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 23
·35204-35216
·
IF 5.19
Song Xu,Mo Jingqian,Fang Yuting,Luo Shumin,Xu Jingjing,Wang Xu
We prepared a double-layer magnetic nanocomposite Fe 3 O 4 @ZIF-8@ZIF-67 by layer-by-layer self-assembly. Fe 3 O 4 @ZIF-8@ZIF-67 was used to remove tetracycline from an aqueous solution via a combination of adsorption and Fenton-like oxidation. Depending on the outstanding porous structure of the Fe 3 O 4 @ZIF-8@ZIF-67, a high adsorption capacity for tetracycline was 356.25 mg g −1 , with > 95.47% removal efficiency within 100 min based on Fenton-like oxidation. To better understand the mechanisms involved in integrated adsorption and Fenton-like oxidation, various advanced characterization techniques were used to monitor the changes in morphology and composition of Fe 3 O 4 @ZIF-8@ZIF-67 before and after removal of tetracycline. Scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) all supported adsorption and Fenton oxidation of tetracycline. This study extends the application of Fe 3 O 4 @ZIF-8@ZIF-67 for environmental remediation. Graphical abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Yanan Dong,Ju Bai,Luqi Xiao,Shangqing Chen,Lu Bai,Huaigang Cheng,Linglong Shan,Junfeng Wang,Yi Nie
Graphical Polyethyleneimine (PEI)-templated ZIF-8 (PEI-ZIF-8) was synthesized and incorporated into the PEI aqueous solution, then interfacial polymerized with trimesoyl chloride (TMC) to obtain the PEI-ZIF-8 modified polyamide NF membrane. The optimal PEI-ZIF-8-TMC membrane exhibits a permeance of 9 L/h m 2 bar and a Mg 2+ /Li + separation factor (SF) of 19. MOFs-modified nanofiltration (NF) membranes have been gained a lot of attention due to their favorable permeability and ion separation performance. Nevertheless, the prevailing preparation techniques are afflicted by the incompatibility of MOFs with polymers and the facile loss of MOFs. In this work, polyethyleneimine (PEI)-templated ZIF-8 (PEI-ZIF-8) was synthesized and incorporated into the PEI aqueous solution, then interfacial polymerized with trimesoyl chloride (TMC) to obtain the PEI-ZIF-8 modified polyamide NF membrane. This PEI modified strategy could endow the ZIF-8 nanoparticles with positively charged properties to avoid the aggregation and increase the interfacial compatibility with the polyamide. Meanwhile, the appropriate pore size of ZIF-8 (3.4 Å), which is between the hydration sheath surrounding of Li + (2 Å) and Mg 2+ (4.2 Å) impart the membrane with precise Mg 2+ /Li + separation ability. The optimal PEI-ZIF-8-TMC membrane exhibits a permeance of 9 L/h m 2 bar and a Mg 2+ /Li + separation factor (SF) of 19, both of which surpass the performance of the pure PEI-TMC membrane, which has a permeance of 4 L/h m 2 bar and a Mg 2+ /Li + separation factor of 11. Meanwhile, the membrane exhibited excellent long-term stability of 85 h. This novel approach to preparing MOFs-modified NF membrane represents a promising avenue for the separation of lithium and magnesium.
研究领域:
材料科学
·
分离技术
·
纳米科技
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 57
·32740-32746
·
IF 2.936
Ya-feng Jin,Chuang-ye Ge,Xiao-bo Li,Miao Zhang,Guang-ri Xu,Dong-hao Li
Herein, we fabricated a sensitive rutin electrochemical sensor via modifying glassy carbon electrode (GCE) with zeolitic imidazolate framework-8 (ZIF-8) and acetylene black (AB) in the presence of chitosan (CS). The electrochemical activity and experimental parameters of the ZIF-8-AB-CS/GCE sensor were investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Under the optimal conditions, the sensor presented a reasonable linear response in the range of 0.1–10 μM with a limit of detection (LOD) as low as 0.004 μM (S/N = 3). The sensor possessed good reproducibility and high stability, and was successfully applied to detect rutin tablet samples with satisfactory results, which was attributed to the synergistic effect between ZIF-8 and AB. Meanwhile, the sensor displayed a potential application for detection of other analytes in real samples. Furthermore, a probable interaction mechanism was proposed to account for the interaction between rutin and the nanocomposite electrode, which was not discussed in previous reports.
研究领域:
分析化学
·
材料科学
·
药物分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF BIOMATERIALS APPLICATIONS
·
2019
·
IF 2.442
Xin Zhang,Jian Wang,Jiaxin Wu,Xiaoge Jiang,Xibo Pei,Junyu Chen,Qianbing Wan,Chao Huang
Nanoscale zeolitic imidazolate framework-8 coating with certain density can significantly improve the osteogenic activity of titanium implants both in vitro and in vivo. In this study, we loaded dimethyloxalylglycine into zeolitic imidazolate framework-8-modified implants (Z-AHT) to enhance the angiogenic activity, and the obtained products were denoted as D-AHT. Firstly, we characterized the specimens via scanning electron microscopy, Fourier transform infrared spectroscopy, powder X-ray diffraction, and surface contact angle. Then, the release kinetics of both zinc ions and dimethyloxalylglycine were investigated. To illustrate the combined effects of surface topography and chemistry (zeolitic imidazolate framework-8 and dimethyloxalylglycine) on osteogenic and angiogenic activity, MC3T3-E1 preosteoblast cells and human umbilical vein endothelial cells were respectively cultured on D-AHT. Pure Ti and Z-AHT were designated as control groups. As evidenced by the expression of osteogenic genes (Alp, Col1, Opg, and Runx2) and the secretion of ALP protein, D-AHT showed comparable osteogenic activity to Z-AHT which was better than that of Ti. Further angiogenesis assay revealed a better human umbilical vein endothelial cell migration on D-AHT, suggesting that D-AHT can be an attractive candidate for application in implant surface modification.
研究领域:
生物材料
·
组织工程
·
细胞生物学
✓ 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）