Catalysis Science & Technology
·
2025
·
IF 4.2
Bin Guan,Junyan Chen,Lei Zhu,Zhongqi Zhuang,Xuehan Hu,Chenyu Zhu,Sikai Zhao,Kaiyou Shu,Hongtao Dang,Junjie Gao,Luyang Zhang,Tiankui Zhu,Wenbo Zeng,Minfan Qian,Zhangtong Li,Yang Lu,Shuai Chen,Zhen Huang
Herein, a detailed study of ZIF-8 CO2 photo-reduction catalysts was carried out, focusing on the characterization of the physicochemical properties of the materials, the photo-catalytic performance and the reaction mechanism. Through the systematic characterization of the ZIF-8 catalyst samples, the differences in the crystal structure, morphological features, specific surface area and optical properties of the materials were investigated. In addition, the catalytic mechanism of the catalysts was investigated in detail by in situ DRIFTS and DFT calculations, and the following conclusions were obtained: among the ZIF-8 catalysts prepared with different ratios of metal centers and ligand precursors, ZIF-8 (8-1) has a more obvious crystalline structure, stronger photoelectron transfer ability (τavg = 2.47 ns), and larger specific surface area (1180.33 m2 g−1), thus possessing the optimal catalytic activity, with a CO generation rate of 1.14 μmol g−1 h−1 and a CH4 generation rate of 0.62 μmol g−1 h−1, and the selectivity of CH4 was 35.28%. The band gap width of the material can be controlled by modulating the content of Zn metal ion centers to promote the photogenerated charge transfer during CO2 adsorption reduction, which corresponds to the enhancement of catalyst activity. The deep-rooted mechanism of CO2 catalytic reduction was revealed, and *COOH and *CHO as the key rapid-control steps of the CO2 catalytic reduction reaction; the energy barrier magnitude of the former (1.56 eV) controlled the reaction product yields, while the energy barrier magnitude of the latter (1.06 eV) was the key to regulate the product selectivity.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
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.
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APPLIED SURFACE SCIENCE
·
2024
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IF 6.3
Menglu Wang,Bolong Liang,Shumin Lin,Zhe Zhao,Hongbin He,Xiliang Li,Shu-xuan Liang
The magnetic Fe 3 O 4 @ZIF-8 with high adsorption properties and easy separation were embedded in BiOX (X = Cl, Br, I) to synthesize Fe 3 O 4 @ZIF-8@BiOX using a simple one-pot solvothermal strategy. The crystal structure, surface morphology, photoelectric properties, thermal stability and magnetic response of the three materials were compared and analyzed, and the effect on the removal of OTC and Cr(VI) from single and coexisting systems by adsorption-photocatalysis is discussed. The results show Fe 3 O 4 @ZIF-8@BiOI has the highest separation efficiency of photogenerated carriers upon photoexcitation and stronger light absorption capacity, and exhibits better adsorption-photocatalytic activity than the other two materials in the photocatalytic reduction of Cr(VI) (68 % and 65 % removal for single and coexisting systems) and degradation of OTC (86 % and 59 % removal for single and coexisting systems). It is noteworthy that in the coexistence of Cr(VI) and OTC, a slight decrease of removal occurred, which could be due to a competitive effect between two pollutants being greater than the synergistic effect. ∙O 2 - is the main active substances in the adsorption-photocatalysis process. Finally, this work demonstrates the excellent adsorption and photocatalytic ability of Fe 3 O 4 @ZIF-8@BiOI for the simultaneous removal of Cr(VI) and OTC, which has great potential for practical wastewater treatment.
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Nano Research
·
2020
·Vol. 13
·期 8
·2259-2267
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IF 8.183
Lei Zhiwen,Shen Jinlai,Zhang Weide,Wang Qingrong,Wang Jun,Deng Yonghong,Wang Chaoyang
The incorporation of inorganic fillers into poly(ethyleneoxide)(PEO)-based solid polymer electrolytes (SPEs) is well known as a low-cost and effective method to improve their mechanical and electrochemical properties. Porous zeolitic imidazolate framework-8 (ZIF-8) is firstly used as the filler for PEO-based SPEs in this work. Due to the introduction of ZIF-8, an ionic conductivity of 2.2 × 10 −5 S/cm (30 °C) is achieved for the composite SPE, which is one order of magnitude higher than that of the pure PEO. ZIF-8 also accounts for the broader electrochemical stability window and lithium ion transference number (0.36 at 60 °C) of the composite SPE. Moreover, the improved mechanism of ZIF-8 to the composite SPE is investigated by zeta potential and Fourier transform infrared spectrograph characterizations. The stability at the composite SPE/lithium interface is greatly enhanced. The LiFePO 4 ||Li cells using the composite SPE exhibit high capacity and excellent cycling performance at 60 °C, i.e., 85% capacity retention with 111 mA·h/g capacity retained after 350 cycles at 0.5 C. In comparison, the cells using the pure PEO show fast capacity decay to 74 mA·h/g maintaining only 68 capacity. These results indicate that the PEO-based SPEs with ZIF-8 are of great promise for the application in solid-state lithium metal batteries.
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高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 42
·21029-21038
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IF 9.931
Liang Zhang,Jing Wang,Xinyi Ren,Wentao Zhang,Tianshu Zhang,Xinnan Liu,Ting Du,Tao Li,Jianlong Wang
The excessive accumulation of toxic copper species makes it imperative to develop smart dual-functional materials for the simultaneous removal and detection of Cu(II) in drinking water. In this work, novel core–shell NH2-MIL-101(Al)@ZIF-8 nanoflowers were successfully fabricated via an internal extended growth mode under the regulation of polyvinylpyrrolidone (PVP) to achieve this goal. Benefiting from the specific affinity of imidazole nitrogen in ZIF-8 toward Cu(II), the resultant NH2-MIL-101(Al)@ZIF-8 shows high adsorption capacity (526.74 mg g−1). Moreover, the fluorescence of NH2-MIL-101(Al) shows a Cu(II)-dependent change, causing this composite to possess superior selective/sensitive detection with a broad linear range (1.5–625 μM) and a low detection limit (0.17 μM) for Cu(II). Specifically, the hybrid MOF@MOF structure provides greater sensitivity as compared to the individual constituent (pristine NH2-MIL-101(Al)) and the mixed state, which is ascribed to the rational optimization of the smart adsorbent based on the following two aspects. (i) The synergistic effect of the core–shell nanostructure improves the preconcentration ability at the interface between single MOFs. (ii) The existence of the three-dimensional hierarchical nanoflower architecture (structure optimization) accelerates the mass transport and sculpts the final composite with enhanced adsorption and detection ability. These indicate that the smart NH2-MIL-101(Al)@ZIF-8 nanoflower could be an excellent candidate for the synchronous remediation and selective detection of Cu(II) in aqueous systems, which could be potentially useful in wastewater treatment and water quality monitoring.
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ACS Applied Electronic Materials
·
2023
·
IF 4.7
Yueming Xin,Haiyan Xu,Yang He,Dandan Chen,Dongcai Li,Aiguo Wang,Daosheng Sun
The regular channels and pores of metal–organic frameworks facilitate Li diffusion and insertion, reduction of polarization, and stabilization of electrolyte–electrode interfaces in lithium-ion batteries. In this paper, a thin layer of zeolitic imidazolate framework-8 (ZIF-8) with a thickness of about 2–4 nm was decorated on the surface of V2O5 by a one-step wet chemical method at room temperature. Various techniques were used to characterize the sample, including X-ray diffraction, transmission electron microscopy, field emission scanning electron microscopy coupled with energy-dispersive X-ray analysis, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller analysis, and Fourier-transform infrared spectroscopy. Cyclic voltammetry, electrochemical impedance spectroscopy, and hybrid pulse power characteristic and galvanostatic intermittent titration techniques were also used to test the electrochemical performance. The electrochemical test results showed that the capacity of V2O5@ZIF-8 was 14 and 58% higher than that of V2O5 at 0.3 and 3 C, respectively, and the capacity retention of V2O5@ZIF-8 still reached 81% after 100 cycles at 0.3 C, which means better structural stability and excellent rate performance of V2O5@ZIF-8. High-speed ion channels of V2O5@ZIF-8 led to smaller polarization. The overpotential of oxidation–reduction from V2O5@ZIF-8 reduced the maximum by more than 90%. The intervention of the porous coating prevented the erosion of V2O5 by the electrolyte and maintained the structure stability. This work aimed to improve the overall electrochemical performance of lithium-ion batteries and provided guidance for future research.
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高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Parviz Sukhrobov,Sodik Numonov,Xamxikamar Mamat,Yongtao Li,Thomas Wågberg,Guangzhi Hu
The present study demonstrated a highly sensitive non-enzymatic glucose biosensor in real blood samples based on simple evaluated nickel deposited on N-doped porous carbon modified glassy carbon electrode (Ni/NPC/GCE) by applying electrochemical deposition method. The prepared material initially were characterized by cyclic voltammetry, the morphology structure of the as-prepared samples was observed by SEM, and composition, crystals structure of Ni/NPC were identified by SEM mapping and EDS tests. The Ni/NPC/GCE compared with NPC/GCE and NiNPs/GCE performed the best electrocatalytic behavior towards oxidation of glucose in 0.1 M KOH medium. By applied potential of +0.6 V Ni/NPC/GCE showed very high sensitivity of 3753.78 μAmM -1 cm -2 in linear range of 1-7940 μM with the correlation coefficient of R 2 =0.995. The linear ranges get views above the concentration up to 7940 μM with the detection limit of 0.3 μM (S/N=3). Amperometric time responses of prepared electrode towards different glucose concentrations are 0.8-1.3s. Finally, several positive characteristics such as very high sensitivity, weak working potential, nice anti-interference properties, long stability, good selectivity, and comparison with some other non-enzymatic sensors Ni/NPC/GCE executed high sensitivity, low detection limit and wide linear range to glucose sensing, thus the selected electrode is supplying for future glucose level determination design.
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高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Huijie Lv,Haohan Yu,Huayin Zhang,Feng Zhu,Ziyi Wang,Qian Xu,Wenliang Ji
ZIF-8 and polydopamine (PDA) double -modified melamine foam (MF), namely ZIF-8@PDA MF was fabricated using a new in-situ growth method for the co-removal of multiple organophosphorus flame retardants (OPFRs) from environmental water. The resulting ZIF-8@PDA MF exhibited a porous, three-dimensional (3D) cross-linked network in which ZIF-8 evenly distributed on MF via the PDA’s adhesive properties, leading to a 17-fold increase in surface area (from 1.357 to 22.964 m 2 /g) to facilitate mass transfer and target binding. Through experimental confirmation, the mechanisms of hydrogen bonding, π-π, electrostatic and hydrophobic adsorption enable the effective removal of 11 types of OPFRs including aryl-, alkyl- and Cl-OPFRs. Compared to the adsorbents reported previously, ZIF-8@PDA MF achieved higher removal efficiencies (53.8%–99.7%), particularly a 30% improvement for highly polar TEP and TCEP. The adsorption behavior of OPFRs by ZIF-8@PDA MF followed a spontaneous, endothermic process, conforming to the pseudo-second-order model and Langmuir model. The adsorption equilibrium could be reached within one hour, 2-48 times faster than most reported studies (2-48 h). In addition, ZIF-8@PDA MF was demonstrated to efficiently remove multiple OPFRs from raw environmental water and the reusability reached up to four cycles without requiring secondary separation, highlighting its practical applicability.
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DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Cheng Zhou,Lina Wang,Junting Sun,Hongbo Wu,Jian Zhang,Zhong Li
Enhancing oxygen reduction reaction (ORR) efficiency relies heavily on designing non-noble metal single-atom catalysts (SACs) with high-density and high-activity sites. For efficient ORR, Fe single atoms are precisely regulated and embedded into porous concave carbon derived from ZIF-8 in this work. ORR performance is significantly improved by the catalyst's concave design and microporous features, which optimize mass transfer and expose more active sites. Furthermore, the high-density, high-activity, and high-spin Fe (III) sites inside the material help to explain the increased intrinsic activity of the catalyst. Due to its unique carrier structure and iron site coordination, this catalyst exhibits outstanding ORR activity in a 0.1 M KOH solution. Additionally, zinc-air batteries constructed with this catalyst display a maximum peak power density of 151 mW cm −2 and a high specific capacity of 818 mAh g Zn −1 , outperforming Pt/C-based systems. This study presents a method for precursor treatment to efficiently and conveniently synthesize microporous carbon-based ORR SACs, aiming to advance ORR catalyst design.
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高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Jing Yu,Jialong He,Yanghong Liu,Jiaheng Li,Chenhao Zhang,Yaling Liu,Rongji Liu,Chen Xu,Kai Dong,Yingping Wang
In this study, we successfully fabricated an eco-friendly nanopesticide with synergistic antifungal efficacy by loading the botanical fungicide osthole (OS) into ZIF-8-derived nanozymes (ZnSA) for microenvironment-enhanced control of ginseng seedling blight. The nanopesticide (OS@ZnSA) exhibited significant photostability and storage stability. Compared with OS technique concentrate, the inhibitory effect on Rhizoctonia solani was increased by 28%. Plant experiments revealed that OS@ZnSA not only promoted the growth of ginseng seedlings but also markedly enhanced the expression of its defense enzymes. Safety evaluation showed that OS@ZnSA had no significant effect on soil microbial community, seed germination, and human immortalized epidermal cells (HaCaT), demonstrating its favorable biosafety profile. Overall, the eco-friendly and microenvironment-enhanced nanopesticides would provide a new perspective for synergistic control of plant disease.
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DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Kunpeng Song,Wen Dong,Cheng Tang,Zhijuan Zou,Yundang Wu
In this study, a novel and highly efficient ORR catalyst is designed via the pyrolysis of zeolitic imidazole framework-8 (ZIF-8) under the protection of hypercrosslinked iron porphyrins . Fe 3 O 4 nanoparticles with oxygen vacancies are formed in situ and promoting catalytic efficiency. Benefiting from the synergistic effect among the Fe 3 O 4 and ZIF-8 skeleton, the hybrid catalyst exhibits excellent ORR activity even surpassing commercial Pt/C. The pyrolyzation temperature is studied in detail and determined to be a crucial parameter for ORR performance. Nano-Fe 3 O 4 , which has high catalytic efficiency, is formed in situ at 800 ℃. Amorphous iron is formed at 600 ℃ and 700 ℃, and zero-valent iron is formed at 900 ℃. The content of oxygen vacancies, Fe–N, and graphite–N, which are beneficial to the ORR reaction, are all reached to a maximum at 800 ℃. This study provides a new approach to design highly active Fe 3 O 4 -based electrocatalytic materials.
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高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Weibin Bai,Xu Zhang,Zhencheng He,Yao Qian,Rongkun Jian,Yucai Lin,Yanlian Xu
The incalculable metal corrosion loss makes the research of long-term corrosion resistant coatings attract much attention. Herein, we demonstrated a new strategy for constructing a pH-responsive nanocontainer as a gatekeeper, which consisted of a laminated double hydroxide (LDH) surface in situ grown ZIF-8 containing the corrosion inhibitor of 2-mercaptobenzimidazole (MBM). The shell-core structures of the composite fillers displayed the excellent barrier performance and pH-responsive controlled release properties in epoxy (EP) coatings. Electrochemical impedance spectroscopy and salt spray tests were conducted to investigate the multifunctional role in providing an intelligent anti-corrosion MBM@ZIF-8@LDH/EP composite coating . After immersing in salt solution (3.5 wt%) for 30 days, the impedance value of the MBM@ZIF-8@LDH/EP coating at 0.01 Hz (|Z| 0.01 Hz ) was 2.82 × 10 8 Ω∙cm 2 , which was about four orders of magnitude higher than that of the epoxy coating (1.54 × 10 4 Ω∙cm 2 ). The outstanding corrosion protection of MBM@ZIF-8@LDH was attributed to not only the compactness improvement of the composite coating, but also the anion exchange capability to act as a storage station for chloride ions. Meanwhile, the active filler could be used as a pH-responsive nanocontainer to release the loaded corrosion inhibitor of MBM and prevented further damage to the steel substrate, displaying a self-healing behavior. This strategy provides a new idea to combine perfect barrier effect and active anti-corrosion performance to prepare high-performance anti-corrosion and self-healing coatings. The multi-protective smart anti-corrosive coating would be a candidate with excellent performance for use in a variety of fields.
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高影响因子
危险品化学品经营许可证（带存储）