APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Qiang Le,Zhilin Cheng
The higher energy consumption and processing cost greatly constricted the extensive application of the adsorption desulfurization technique. Herein, the nano-Ag 2 O/ZIF-8@ polyacrylonitrile (PAN) nanofiber membrane (NFM) was successfully made by using electrospinning and microwave-assisted synthesis. The characterizations demonstrated that the nano-Ag 2 O-dotted ZIF-8 with the exclusive corncob-like structure uniformly grew on the surface of PAN nanofiber. The in-situ fabrication of nano-Ag 2 O/ZIF-8 on the surface of PAN nanofiber was rapidly realized by microwave-assisted method, thus resulting in the less loss of the mechanical performance of NFM. The tests indicated that the tensile strength and young's modulus of Ag 2 O/ZIF-8@PAN NFM were 35 % and 185 % higher than PAN NFM, respectively. The fabrication of the multi-pore structure endowed the Ag 2 O/ZIF-8@PAN NFM to achieve the superior adsorption performance for thiophene (TH) from fuel oil, having the increase by 312 % and 175 % in the batch adsorption (maximum: 37.142 mg·g −1 ) and fixed-bed breakthrough adsorption (maximum: 35.423 mg·g −1 ) capacities compared to PAN NFM, respectively. Furthermore, the saturated adsorption capacity of Ag 2 O/ZIF-8@PAN NFM in fixed-bed adsorption experiment was higher than those of Cu 2 O-doped PAN NFM (4.571 mg·g −1 ) and Ag 2 O@HNTs-doped PAN NFM (31.982 mg·g −1 ) reported by our previous study. The adsorption mechanism of TH molecules on the Ag 2 O/ZIF-8@PAN NFM was explored by the kinetics, intra-particle diffusion, isotherms and thermodynamic models, which affirmed to exist the synergistic effect of physical adsorption, and chemical adsorption including π-complexation interaction and S-M interaction adsorption. Finally, this work provided a novel prospective adsorption desulfurization based on the membrane separation.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Meilin Yin,Zhen Li,LiPeng Wang,Shaokun Tang
The fabrication of structural stable metal organic frameworks (MOFs) with large pore size by facile, rapid and environmentally friendly synthetic method remains a serious challenge. Herein, it is the first time to develop a novel synthetic strategy that rapidly enlarges the pore size of microporous ZIF-8 by employing polyvinyl pyrrolidone (PVP) as a modulator to induce defect formation in environmentally friendly supercritical CO 2 (scCO 2 ). Notably, the high solubility and low mass transfer resistance of reactants in scCO 2 and low surface tension nature of scCO 2 are the key factors for the rapid preparation of structural stable PVP/ZIF-8 with hierarchically pores. And the PVP modulator as a weak ligand not only facilitates pore size but also perturbs coordination to form coordination defects, exposing more coordination metal sites. These characteristics are beneficial to fast diffusion and adsorption of CO 2 molecules. In addition, the influences of reaction conditions on the morphology, pore parameter and CO 2 adsorption performance of PVP/ZIF-8 are investigated. The result indicates that the PVP/ZIF-8 prepared with 1:1 of Zn/PVP mass ratio at 90 °C and 30 MPa in supercritical environment have the highest CO 2 adsorption equilibrium capacity (2.02 mmol CO 2 /g sorbent) and great cycle stability, which should be attributed to hierarchically porous structure with interconnected macropores and micropores.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Nuan Xu,Zhenhua Tang,Yan-Ping Jiang,Junlin Fang,Li Zhang,Xiaofang Lai,Qi-Jun Sun,Jing-Min Fan,Xin-Gui Tang,Qiu-Xiang Liu,Ji-Kang Jian
The widely used pesticide thiram is found in various environments and foodstuffs, posing a risk to human health and contaminating the environment. In this work, the novel SERS flexible sensor (FP/AgNWs@ZIF-8) consisting of silver nanowires and zeolite imidazole frameworks combined with filter paper was prepared for the sensitive and rapid detection of thiram on fruit peel surfaces. The effect that different coating cycles of ZIF-8 films exert on the Raman signal enhancement of the sensor was investigated. The results show that optimal Raman response to 4-Aminothiophenol (4-ATP) was demonstrated in the FP/AgNWs@ZIF-8(5) sensor, with a low LOD of 1.6 × 10 −15 M due to a coating period of 5. Furthermore, a novel SERS FP/AgNWs@ZIF-8 sensor with a porous and flexible structure on low-cost and eco-friendly paper was obtained, as to be immersed in a solution of thiram or wiped on a nectarine skin surface, and the highly sensitive LODs of 1.4 × 10 −12 M and 7.4 fg/cm 2 were achieved, respectively. Therefore, this facile, rapid, and sensitive flexible sensor at low-cost has excellent potential for pesticide residue detection and environmental toxicity analysis.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Haonan Wang,Kaifeng Yu,Pengtao Wang,Pengcheng Jia,Yongzhi Yuan,Ce Liang
Metal-organic frameworks (MOFs) have the advantages of controllable chemical properties, rich pore structures and reaction sites and are expected to be high-performance anode materials for the next generation of potassium-ion batteries (PIBs). However, due to the large radius of potassium ions, the pure MOF crystal structure is prone to collapse during ion insertion and processing, so its electrochemical performance is quite limited. In this work, a hollow carbon sphere-supported MOF-derived Co/CoSe heterojunction anode material for potassium-ion batteries was developed by a hydrothermal method . The anode has high potassium storage capacity (461.9 mA h/g after 200 cycles at 1 A/g), excellent cycling stability and superior rate performance. It is worth noting that the potassium ion storage capacity of the anode material shows a gradual upward trend with the charge–discharge cycle, which is 145.9 mA h/g after 3000 cycles at a current density of 10 A/g. This work demonstrates that MOF-derived CoSe anodes with high capacity and low cost may be promising candidates for the introduction of potassium ion storage.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2023
·
IF 4.1
Jie Liang,Weiwei Zhang,Jun Wang,Wanzhen Li,Fei Ge,Weihao Jin,Yugui Tao
Recently, the combination of chemotherapy and chemodynamic therapy (CDT) has become a desirable strategy in the treatment of cancer. However, a satisfactory therapeutic outcome is often difficult to achieve due to the deficiency of endogenous H2O2 and O2 in the tumor microenvironment. In this study, a CaO2@DOX@Cu/ZIF-8 nanocomposite was prepared as a novel nanocatalytic platform to enable the combination of chemotherapy and CDT in cancer cells. The anticancer drug doxorubicin hydrochloride (DOX) was loaded onto calcium peroxide (CaO2) nanoparticles (NPs) to form CaO2@DOX, which was then encapsulated in a copper zeolitic imidazole ester MOF (Cu/ZIF-8) to form CaO2@DOX@Cu/ZIF-8 NPs. In the mildly acidic tumor microenvironment, CaO2@DOX@Cu/ZIF-8 NPs rapidly disintegrated, releasing CaO2, which reacted with water to generate H2O2 and O2 in the tumor microenvironment. The ability of CaO2@DOX@Cu/ZIF-8 NPs to combine chemotherapy and CDT was assessed by conducting cytotoxicity, living dead staining, cellular uptakes, H&E staining, and TUNEL assays in vitro and in vivo. The combination of chemotherapy and CDT of CaO2@DOX@Cu/ZIF-8 NPs had a more favorable tumor suppression effect than the nanomaterial precursors, which were not capable of the combined chemotherapy/CDT.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 34
·期 30
·305402
·
IF 3.5
Wenbo Wang,Shuai Han,Nian Li,Yanping Song,Liqing Chen,Cui Liu,Shudong Zhang,Zhenyang Wang
This work demonstrates a facile and efficient methodology to synthesize a composite material of zeolitic imidazolate frameworks (ZIFs) and laser-induced graphene (LIG). This ZIF-67 loaded LIG composite (ZIF-67/LIG) has been adequately characterized for its morphology and structure, and its electrochemical performance has been specifically examined. As supercapacitors (SCs) electrode material, the ZIF-67/LIG composite exhibits superb electrochemical performance, owing to the inherent high porosity, abundant active sites, large specific surface area of ZIF-67, and the excellent conductive three-dimensional hierarchical porous network structure provided by LIG. In three-electrode system, ZIF-67/LIG composite electrode displays outstanding areal specific capacitance (CA) of 135.6 mF cm−2 at a current density of 1 mA cm−2 with 1 M Na2SO4 aqueous electrolyte, which is far greater than that of pristine LIG (7.7 mF cm−2). Furthermore, the ZIF-67/LIG composite has been fabricated into an all-solid-state planar micro-supercapacitor (MSC). This ZIF-67/LIG MSC exhibits an impressive CA of 38.1 mF cm−2 at a current density of 0.20 mA cm−2, a good cycling stability of 80.3% capacitance retention after 3000 cycles, and a high energy density of 5.29 μWh cm−2 at a power density of 0.1 mW cm−2. All electrochemical results clearly manifest that as-prepared ZIF-67/LIG composite can be a candidate in energy storage field with exciting possibilities.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 34
·期 8
·085401
·
IF 3.953
Hongna Jia,Yao Wang,Shuya Zhao,Haipeng Wang,Na Ju,Xinyue Zhang,Hong Li,Zejun Sun,Hong-bin Sun
Carbon materials derived from metal-organic frameworks have attracted increasing attention as anodes for energy storage. In this study, Fe, Ni-doped ZIF-8 is carbonized at high temperature to obtain bimetallic Fe and Ni modified tension -relaxed carbon (FeNi@trC). Fe and Ni have opposite structural modification effects when the metal ions are doped into the ZIF-8 dodecahedron. The obtained carbon material maintains the regular dodecahedron morphology, which means the relaxation of tension and strong thermal stability during annealing. Moreover, the presence of nickel enhances the carbonization degree and electrochemical stability of FeNi@trC, while the calcination of the tensive ZIF-8 precursor offers more defect sites. The discharge capacities of FeNi@trC materials are stable at 182.9 mAh·g−1 and 567.9 mAh·g−1 for sodium-ion batterie (SIB) and lithium-ion batterie (LIB) at 0.05 A·g−1. Compared with the current density of 0.05 A·g−1, the discharge capacity of SIB and LIB attenuates by 29.4% and 55.9% at 1 A·g−1, respectively, and the FeNi@trC shows good performance stability in the following cycles.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Jingmei Xu,Xuan Chen,Mengchi Ju,Jiahui Ren,Pengyun Zhao,Lingxin Meng,Jinxuan Lei,Qingyuan Shi,Zhe Wang
In this study, a sulfonated poly (ether ketone sulfone) with multiple sulfonic acid groups was prepared and named as MSP, where the multiple sulfonic acid groups in the polymer were located on its side chains of uneven length. And a series of hybrid membranes were prepared by introducing organic–inorganic fillers (ZIF-67/GO) into this side chain type polymer matrix. Among them, ZIF-67 was chemically grafted onto the GO sheet through coordination between Co + and the carboxyl group of GO, bound to GO and grown uniformly. The ZIF-67/GO and hybrid membranes were characterized by FT-IR, XRD, SEM, AFM and 1 H NMR. The hybrid membranes exhibited increasingly high proton conductivity from MSP (0.0876 S cm −1 ) to MSP-1 % ZIF-67/GO (0.1426 S cm −1 ) at 100 °C and 100 % relative humidity. Moreover, the hybrid membranes have excellent chemical stability. The results indicated that ZIF-67/GO was important for constructing of proton transport channels, and the prepared hybrid membranes showed great potential for application in PEM.
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2023
·
IF 8.9
Zhuanzhuan Shi,Fang Shi,Yunpeng Li,Xiaoshuai Wu,Zhengyang Liu,Liang Liu,Qianqian Fu,Chang Ming Li,Chunxian Guo
Cell’s activities are highly dependent on signal molecules, of which reactive oxygen species of the superoxide anion (O2•–) and hydrogen peroxide (H2O2) are important ones that always work together to regulate biological processes such as apoptosis and oxidative stress. It is of significance to realize simultaneous qualification of O2•– and H2O2 but it still faces challenges particularly in live-cell assay with a complex environment. We report the design of a bifunctional sensing material by interfacially regulating ZIF-67 on bacteria Shewanella putrefaciens to generate cobalt nanoparticles/nitrogen-doped porous carbon nanorods (Co/N-doped CNRs) and its sensing chip for qualifying cell-released O2•– and H2O2. Co/N-doped CNRs exhibit unique properties including porous structure for significantly increased reaction surface area and coordinating Co nanoparticles for rich active sites. The bifunctional Co/N-doped CNRs is used to fabricate the electrochemical sensing chip, which achieves a fast response time (0.5 s for O2•–, 1.9 s for H2O2), a low detection limit (0.69 nM for O2•–, 2.25 μM for H2O2), and a remarkably high sensitivity (792.30 μA·μM–1·cm–2 for O2•–, 153.91 μA·mM–1·cm–2 for H2O2), among the best of reported bifunctional nanozymes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Qian Wang,Chengyi Xiong,Jingwen Li,Qianchun Deng,Xiuhua Zhang,Shengfu Wang,Miao-Miao Chen
Aflatoxin B1 (AFB1) that is prone to contaminate corns brings a serious threat to human health. Therefore, it is of great significance to construct novel detection methods for AFB1 tracing. Here, methylamine perovskite quantum dots (MP QDs) encapsulated by ZIF-8 metal–organic frameworks (MP QDs@ZIF-8) were prepared and then ultra-stable electrochemiluminescence (ECL) sensors were developed. By the confinement of cavities structure, multiple MP QDs were crystallized and embedded inside ZIF-8 to form MP QDs@ZIF-8, achieving stable and robust ECL responds in aqueous environment. Further combined with AFB1-imprinted polymer, the constructed ECL sensor showed good selectivity and ultra-sensitivity (the detection limit was 3.5 fg/mL, S/N = 3) with a wide linear range from 11.55 fg/mL to 20 ng/mL for AFB1 quantification. Satisfactory recoveries in corn samples indicated the reliable practicability of the proposed sensor for AFB1 assay. This work provided a novel pathway in designing high-performance ECL sensing platform for food safety.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Keke Yang,Guilin Song,Yuanyuan Li,Qingda An,Shangru Zhai,Zuoyi Xiao
Nowadays there is much room for improvement in the designed synthesis of high-performance electromagnetic wave absorbers by combining metal-organic frameworks (MOFs) and biomass components. Herein, 3D N-doped porous carbon cobalt/cobalt oxide (NPC/Co/CoO) composites were successfully prepared by transforming in-situ grown ZIF-67 clusters on a chitosan matrix. Analysis results showed that the N-doped carbonaceous composites obtained had unique porosity, high specific surface area, and defect-enriched structure, which provided numerous paths for electron transfer , leading to big benefits to interfacial polarization and dipole polarization. Most importantly, the ferromagnetic resonance and magnetic coupling were enhanced by ZIF-67-derived Co/CoO nanoparticles . By adjusting the content of metallic cobalt salt, pyrolysis temperature, and sample filling content, the optimal impedance matching properties of the composites could be optimized. When the matching thickness is 2 mm, the RL min of NPC/Co/CoO-10/700–30 wt% achieved − 48.97 dB at 13.52 GHz, and the effective absorption bandwidth exceeds 5.36 GHz. The composites with excellent performance prepared by a controllable process using chitosan and ZIF-67 might be a promising alternative for the large-scale preparation of high-frequency electromagnetic wave absorbers.
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 3
·1173
·
IF 4.6
Yixuan Li,Yanqi Xu,Cunjun Li,Wenfeng Zhu,Wei Chen,Yufei Zhao,Ruping Liu,Linjiang Wang
The rational design of efficient Earth-abundant electrocatalysts for the ethanol oxidation reaction (EOR) is the key to developing direct ethanol fuel cells (DEFCs). Among these, the smart structure is highly demanded for highly efficient and stable non-precious electrocatalysts based on transition metals (such as Ni, Co, and Fe). In this work, high-performance NiCo-layered double hydroxide@carbon nanotube (NiCo-LDH@CNT) architectures with hollow nanocage structures as electrocatalysts for EOR were prepared via sacrificial ZIF-67 templates on CNTs. Comprehensive structural characterizations revealed that the as-synthesized NiCo-LDH@CNTs architecture displayed 3D hollow nanocages of NiCo-LDH and abundant interfacial structure between NiCo-LDH and CNTs, which could not only completely expose active sites by increasing the surface area but also facilitate the electron transfer during the electrocatalytic process, thus, improving EOR activity. Benefiting from the 3D hollow nanocages and interfacial structure fabricated by the sacrificial ZIF-67-templated method, the[email protected]% architecture exhibited enhanced electrocatalytic activity for ethanol oxidation compared to single-component NiCo-LDH, where the peak current density was 11.5 mA·cm−2, and the jf/jbvalue representing the resistance to catalyst poisoning was 1.72 in an alkaline environment. These results provide a new perspective on the fabrication of non-precious metal electrocatalysts for EOR in DEFCs.
✓ 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）