MICROCHEMICAL JOURNAL
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2022
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IF 5.304
Xin Zhang,Li Tian,Kexin Wu,Zhuo Sun,Qian Wu,Xiangyu Shan,Yingjie Zhao,Ruizhan Chen,Juan Lu
An electrochemical luminescence (ECL) sensor for the detection of glucose was constructed by covering CdTe nanomaterials, ZIF-7 and glucose oxidase (GOD) on the electrode surface, respectively. CdTe and ZIF-7, as co-reaction promoters, could amplify ECL signals through synergy effect. The results demonstrated that ECL intensity increased when the concentration of glucose increased. Based on the change of ECL intensity, a method for the determination of glucose was established. Possible response mechanisms were also studied. The parameters of measurement conditions were optimized. The linear range of glucose was 2.0 × 10 −10 ∼ 2.0 × 10 −5 mol L −1 and the detection limit was 6.7 × 10 −11 mol L −1 under the optimal conditions. The constructed sensor had high sensitivity and selectivity. The results were satisfactory for the determination of glucose in real human serum samples.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Zhi Wang,Zhaokun Wang,Jiashuai Wang,Haofeng Shi,Chengdeng Wang,Yila Fan,Zhiming Bai,Chuang Zhu,Xiaoqin Yan
Water electrolysis has been acknowledged as a renewable, scalable, and effective way of producing hydrogen . However, for water splitting, efficient and noble metal-free electrocatalysts were lacking. Here, a Co–Ni–Zn porous three-dimension N-doped carbonization structure on the carbon nanotube film (CNTF) was synthesized through a metal organic frameworks (MOFs) annealing procedure. The porous morphology, caused by the evaporation of zinc at high temperatures, enhances the interaction between the catalysts and electrolyte, and the self-supporting structure minimizes the contact resistance between the catalysts and the substrate, which reduces obstructions during current flow. More active sites, multiple mesopores, and high conductivity are all features of this composite structure. It can achieve a small overpotential of 112 mV and 270 mV at a current density of 10 mA cm −2 , respectively, for hydrogen and oxygen evolution reactions (HER and OER). At a current density of 10 mA cm −2 , the Co–Ni–Zn/NCNTF has an external voltage of 1.58 V and is very durable for overall water splitting.
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Journal of Materials Chemistry C
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2023
·Vol. 11
·期 35
·12057-12067
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IF 6.4
Zhenping Ma,Lei Zhang,Xianzhen Wang,Guang Xiao,Yongbao Feng,Wei Wang,Konghu Tian,Dewei Liang,Yagang Yao,Qiulong Li
With the rapid advancements of portable and wearable devices, high-efficiency electromagnetic interference (EMI) shielding materials are highly required to eliminate radiated electromagnetic pollution. Ti3C2Tx MXene has shown great application potential as an EMI SE material due to its good conductivity. However, a single-loss mechanism has many limitations. Herein, to enrich the electromagnetic-wave-loss ways, MXene@ZIF-67/multiwalled carbon nanotubes (MWCNTs) composite films were successfully prepared by vacuum-assisted filtration, combined with the introduction of magnetic ZIF-67 anchored on MXene by an electrostatic self-assembly method. The MXene@ZIF-67/MWCNTs composite film (MZ2M8) achieved the best EMI shielding performance of 63.6 dB at 32 μm thickness, and the contribution ratio of the scattering parameters for absorption to reflection, i.e., SEA to SET, was 66.94%, thus achieving high absorption loss. Due to the high aspect ratio of the MWCNTs and the densely stacked “brick–mortar” layered structure, the composite film also exhibited excellent flexibility and mechanical performance, in which MZ8M2 could deliver a high tensile strength of 115.2 MPa, ensuring practical applications in different environments. Moreover, the thermal conductivity of MZ2M8 reached 3.367 W m−1 K−1, realizing the synergistic effect of high shielding efficiency and heat-dissipation performance, and avoiding the phenomenon of heat accumulation caused by the conversion of electromagnetic waves into heat energy.
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Journal of Chemistry
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2023
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IF 3
Hao Fu,Aotian Gu,Peng Wang,Chunhui Gong,Zhiying Li,Kai Chen,Yi Yang
The exploration of transforming various metals as metal sources into metal organic frameworks (MOFs) has attracted considerable attention in recent years. This study used triethylamine and 5,6-dimethylbenzimidazole (DMBIM) to modify the iron-doped cobalt zeolite imidazole framework on carbon fiber structure. The results showed that the ZIF(Fe/Co)1.25@CNF exhibited high CEF removal efficiency that over 97% of ceftiofur sodium (CEF) was removed within 10 min, which was significantly higher than that of the common ZIF-67 materials. Compared with other ZIF-67 composites, ZIF(Fe/Co)x@CNF has a larger specific surface area, resulting in a larger contact area and more active sites during the reaction. After the introduction of DMBIM, the ZIF(Fe/Co)1.25@CNF not only easily separated from the solution but also enhanced the hydrophobicity, which provided higher catalytic stability and catalytic performance. In addition, the effects of different catalyst ratios, pollutant concentrations, solution pH, and different radicals (•OH, SO4•−, 1O2) on the activation of peroxymonosulfate (PMS) were investigated. The mechanism of degradation was elucidated by electron paramagnetic resonance experiments. This study provides a new perspective for the preparation of high-performance MOF catalysts with excellent catalytic performance and may facilitate the application of MOF materials in more practical situations.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2023
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IF 4
Heng Wang,Xianjin Qi,Guizhi Yan,Jiahao Shi
Arsenic pollution is an international problem that must be urgently controlled. Therefore, this study is based on a one-pot precipitation method, in which copper ions were added to a zinc organic metal framework (ZIF-8) to partially replace the zinc ions and the obtained adsorbent (Cu-ZIF-8) used to effectively remove As(V) ions from water. The successful synthesis of the Cu-ZIF-8 adsorbent and its adsorption mechanisms were confirmed using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), and X-ray photoelectron spectroscopy (XPS). In addition, the effects of pH (3–11), initial arsenic concentration (10–350 mg/L), and reaction time on the adsorption performance were also characterized. Our findings demonstrate that Cu-ZIF-8 had a high As(V) adsorption capacity of 238.11 mg/g, which was significantly higher than that of most adsorbents previously reported in the literature. Moreover, this material maintained >75% of its initial adsorption capacity after four adsorption-desorption cycles. The adsorption kinetics of Cu-ZIF-8 were accurately described using the pseudo-second-order kinetic model, whereas the adsorption isotherm was fitted using the Langmuir model. Collectively, our findings have demonstrated that doping organic metal frameworks with metal ions can substantially improve their adsorption performance without changing their structural properties. Therefore, Cu-ZIF-8 is a promising adsorption material for the treatment of As(V)-contaminated water.
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Molecular Catalysis
·
2022
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IF 5.089
Jianfeng Li,Jinfang Kou,Yongsheng Xiang,Minglin Chen,Junyi Zhang,Xuecheng Zhan,Huan Zhang,Fushan Wang,Zhengping Dong
Catalytic semi-hydrogenation of alkynes to alkenes plays an important role in the polymer, fragrance, medicine, and other chemical industrial fields. However, increasing the selectivity of alkenes during the semi-hydrogenation process is a huge challenge. Herein, N-doped porous carbon support (NC) was fabricated from zinc-based zeolite imidazole frameworks (ZIF-8). Ultrafine PdNi bimetallic nanoparticles (NPs) were uniformly dispersed, stably anchored on the NC support, and used as an efficient alkynes semi-hydrogenation catalyst. The synthesized Pd 2 Ni 2 /NC catalyst had a selectivity of 95.1% toward styrene and high catalytic activity (TOF=977.7 h −1 ) for the semi-hydrogenation of phenylacetylene under mild reaction conditions. The catalyst was mainly through metal-support interaction and electron transfer between Pd and Ni metal, modulating the electronic structure of the active sites, thus improving the selectivity of styrene. Selective hydrogenation of various substituted alkynes on Pd 2 Ni 2 /NC catalyst has also proved excellent applicability, and the obtained catalyst can be reused with favorable stability. This study adjusted the catalytic performance by adding a secondary metal, which provided a useful strategy for designing highly efficient catalysts for the semi-hydrogenation of alkynes.
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ACS Applied Nano Materials
·
2023
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IF 5.9
Nahar Jannatun,Yuqian Zhang,Ben Wu,Qingle Song,Guoli Cao,Wenhe Luo,Feng Yuan,Qi Li,Yanqiao Zeng,Guofang Zhang,Guocheng Wang,Yang Li
Epigallocatechin-3-gallate (EGCG), the most abundant tea polyphenol, possesses excellent anti-inflammation properties. Emerging studies proved its potent potential as an immune checkpoint (ICP) inhibitor for anticancer therapy. However, the low bioavailability of EGCG reduces its treatment efficiency. In this work EGCG-based nanomedicine EGCG–ZIF-8@PDA–PEG (EZP) was developed via the coordination between ZIF-8 MOF and EGCG, followed by polydopamine and PEG functionalization for efficient tumor-targeting EGCG delivery. Results demonstrated that the EGCG loading rate in EZP reached up to 85%. Both in vitro and in vivo studies proved that the EZP nanoparticles were capable of inhibiting the expression of ICP molecules and modulating the inflammatory tumor microenvironment, evidenced by the suppression of PD-L1 expression, the reduction of inflammatory cytokines, and the resultant decline in the number of immunosuppressive cells, for instance, myeloid-derived suppressor cells, tumor-associated macrophages, and regulatory T cells. These synergistic effects significantly improved the infiltration of dendritic cells and T cells in tumors, realizing an inspiring antitumor effect.
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CERAMICS INTERNATIONAL
·
2023
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IF 5.2
Chengjuan Wang,Haotian Jiang,Bowen Cui,Xiaodan Xu,Yanxiang Wang,Chengguo Wang
Rational design of multifunctional and high-performance electromagnetic wave (EMW) absorbers is highly desirable but still remains a challenge. Herein, the 3D heterostructural Co@carbon nanotubes/carbon fiber (Co@CNTs/CF) hybrids derived from ZIF-67/CF were successfully fabricated via the in-situ synthesis of ZIF-67 on CF and subsequent catalytic chemical vapour deposition. Intriguingly, the as-obtained composites acquire adjustable EMW absorption and favorable mechanical properties simultaneously. Specifically, taking advantage of adequate conductive paths, plentiful heterogeneous interfaces, suitable defect vacancies, appropriate magnetic loss, as well as optimized impedance matching, Co@CNTs/CF delivers a brilliant EMW absorption intensity of −45.11 dB at only 1.15 mm together with a broad effective absorption bandwidth (EAB) of 4.0 GHz (1.23 mm), and an unexpected minimal reflection loss up to −65.63 dB (3.84 GHz) coupled with an EAB of 3.6 GHz at merely 1.09 mm, respectively. In addition, the tunable EAB can be achieved in 2.6–18 GHz, covering 96 % of the test frequency by changing the absorber thickness from 0.93 to 5.0 mm (29 wt%). Moreover, the maximum radar cross section reduction can reach 48.8 dBm 2 . The uniform layer of CNTs with moderate crystallinity also enables Co@CNTs/CF to improve the tensile strength and Weibull modulus compared to unsized CF. This study paves a novel avenue for developing multifunctional materials based on CF through an efficient, controllable and low-cost approach.
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JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
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2023
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IF 3.4
Xueqiang Sun,Fuxin Li,Lingyan Yuan,Zhitong Bing,Xun Li,Kehu Yang
Resveratrol (Res) is known for its potential in treating various types of cancers, with a particular advantage of causing minimal toxic side effects. However, its clinical application is constrained by challenges such as poor bioavailability, low water solubility, and chemical instability in neutral and alkaline environments. In light of these limitations, we have developed a pH-responsive drug delivery nanoplatform, Res@ZIF-8/TA NPs, which exhibits good biocompatibility and shows promise for in vitro cancer therapy. Benefiting from the mild reaction conditions provided by zeolitic imidazolate frameworks (ZIFs), a “one-pot method” was used for drug synthesis and loading, resulting in a satisfactory loading capacity. Notably, Res@ZIF-8/TA NPs respond to acidic environments, leading to an improved drug release profile with a controlled release effect. Our cell-based experiments indicated that tannic acid (TA) modification enhances the biocompatibility of ZIFs. 3-(4,5)-dimethylthiahiazo (-z-y1)-3,5-di- phenytetrazoliumromide (MTT assay), Hoechst 33342/PI staining, cell scratch assay, Transwell and Reverse Transcription quantitative PCR (RT-qPCR) assays further demonstrated that Res@ZIF-8/TA NPs inhibited colon cancer cell migration and invasion, and promoted apoptosis of colon cancer cells, suggesting a therapeutic potential and demonstrating anti-cancer properties. In conclusion, the Res@ZIF-8/TA NPs pH-responsive drug delivery systems we developed may offer a promising avenue for cancer therapy. By addressing some of the challenges associated with Res-based treatments, this system could contribute to advancements in cancer therapeutics.
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PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 107
·期 2
·719-735
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IF 3.9
Mojtaba Rostami,Milad Jourshabani,Fatemeh Davar,Ghodsi Mohammadi Ziarani,Alireza Badiei
In this research, the ultrasound (US) technique was applied as a facile synthesis method for preparing the black TiO 2 -g-C 3 N 4 type II heterojunction, coupled with a Schottky junction MOF (ZIF-67)-derived x wt% Co 3 S 4 /nitrogen-doped carbon (NC) ( x = 3, 10, and 15) with hollow nanobox (HNB) morphology, as a smart nanoheteroarchitecture (NHA) photocatalyst to enhance visible-light photocatalytic activity. Additionally, the solvothermal synthesis route was employed to fabricate the MOF (ZIF-67)-derived Co 3 S 4 /NC cubic hollow nanoboxes (CHNBs) before the pyrolysis process. The black TiO 2 -g-C 3 N 4 wt% Co 3 S 4 /NC (TiCN-15% CoS/NC) NHAs exhibited high photocatalytic activity in degrading methylene blue. The synergetic effect of all components in black TiCN- x wt% CoS/NC NHAs resulted in efficient electron-hole pair separation and charge mobility on Co 3 S 4 /NC HNB and g-C 3 N 4 surfaces, which led to a highly effective recombination rate of charge carriers and an excellent improvement in photocatalytic performance.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Tao Zhang,Xiaoying Jin,Gary Owens,Zuliang Chen
Dye-contaminated wastewater resulting from rapid industrialization and urbanization is a global problem. In this study, a ZIF-8@Fe/Ni sample was synthesized for the removal of malachite green (MG), removing more than 99% of an initial MG concentration of 50 mg L −1 within 120 min with a 318 K adsorption capacity of 151.520 mg g −1 . To understand the dye removal mechanism based on adsorption and reduction, ZIF-8@Fe/Ni was characterized by various techniques. XRD showed that the ZIF-8@Fe/Ni composite had a characteristic peak attributable to Fe/Ni around 44.8°, where the presence of Fe/Ni did not affect the structure of ZIF-8. SEM confirmed that ZIF-8@Fe/Ni was successfully prepared, while XRD and FTIR revealed that the structure of ZIF-8@Fe/Ni remained stable following the introduction of Fe/Ni. XPS showed that while Fe/Ni nanoparticles existed in ZIF-8-Fe/Ni, partial oxidation also occurred. GC–MS demonstrated the creation of two major MG degradation products, (4-aminophenyl) (phenyl) methanone and 4-aminophenol. While the overall adsorption process of MG to ZIF-8@Fe/Ni conformed to pseudo-second-order kinetics, degradation followed pseudo-first-order reduction kinetics. When applied to the remediation of wastewater, ZIF-8@Fe/Ni removed 92% of MG. Overall, this study demonstrated that ZIF-8@Fe/Ni could be a promising material for the treatment of wastewater.
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JOURNAL OF MEMBRANE SCIENCE
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2021
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IF 8.742
Kui Ma,Naixin Wang,Chengcheng Wang,Quan-Fu An
In recent years, metal-organic framework (MOF) membranes have attracted much attention in many fields. However, the fabrication of MOF membrane with defect-free ultrathin separation layer on the surface of a substrate is very difficult. In this study, freezing assisted in situ growth strategy was used to prepare a nano-confined ZIF-8 composite membrane on a porous ceramic substrate . The frozen alumina substrate with the metal ion ice crystal inside the pores was immersed in ligand solution for the growth of ZIF-8 crystals. Then, ZIF-8 nanoparticles were grown inside the pores rather than on the surface of the substrate. The morphology and structure of the ZIF-8 particles and nano-confined composite membranes were characterized by XRD , SEM, FTIR , EDS, and nanoindentation . The obtained nano-confined ZIF-8 composite membrane exhibited excellent separation performance and stability for removing dyes from water. The influence of preparation conditions on membrane structure and property was also investigated. The freezing assisted method may provide an avenue for preparing MOF membranes in other fields.
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