RARE METALS
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2025
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IF 11
Zhao Zhi-Hua,Ma Shi-Xin,Pan Ya-Fang,Rahmatullah Abu-Bakker-Md,Shen Xiao-Qing,Shao Zhi-Gang,Wu Lan
To facilitate real-time monitoring and recording of humidity in the environment and to satisfy the requirement for strain performance in certain applications (such as wearable devices), this paper proposes an in-situ method for synthesising Au nanoparticles on ZIF-67. In this study, an Au@ZIF-67 composite humidity-sensitive material was combined with flexible polyethylene terephthalate interdigitated electrodes to create an Au@ZIF-67 flexible humidity sensor. The prepared samples were characterised using X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy. The humidity-sensitive properties of the sensor were investigated, and its monitoring capabilities in applications involving respiration, gestures, skin, and baby diapers were tested. The experimental results indicate that compared with a pure ZIF-67 humidity sensor, the Au@ZIF-67 (0.1Au@Z) flexible humidity sensor exhibits a 158.07% decrease in baseline resistance and a 51.66% increase in sensitivity to 95% relative humidity, and the hysteresis, response time, and recovery time are significantly reduced. Furthermore, the sensor exhibits excellent characteristics such as high resolution, repeatability, and stability. The obtained results regarding the material properties, humidity sensitivity, and practical application of non-contact humidity monitoring demonstrate that the prepared sensors exhibit excellent and comprehensive performance, indicating their broad prospects in wearable medical devices, wireless Internet of Things, humidity detection in complex environments, and intelligent integrated systems. Graphical abstract
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高影响因子
OPTICAL MATERIALS
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2024
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IF 3.8
Shuoqi Zhang,Mingxing Zhao,Lei Shi,Chunsheng Lei
In this paper, a novel Z-scheme BiOI/ZIF-67 photocatalyst (BOI/ZIF) was successfully prepared using an in-situ growth method, and its effectiveness in degrading tetracycline (TC) under visible light was assessed. Using a range of characterization techniques, the crystal structure, elemental composition, microstructure and optical characteristics of the composite catalyst were examined. Simultaneously, a 30 % mass ratio catalyst (BOI/ZIF-30) could remove 91 % of TC under visible light, which was 41 % and 28 % greater than the degradation rates of BiOI and ZIF-67, respectively. These results demonstrated that BOI/ZIF exhibited strong photocatalytic activity and excellent stability. The results of the radical quenching experiment and electron spin resonance revealed that h + and •O 2 − were the principal chemical substances responsible for TC degradation, corresponding with the suggested charge transfer mechanism of Z-scheme heterojunction. The Z-scheme heterojunction created between BiOI and ZIF-67 improved the effective separation of photogenerated carriers and boosted the efficiency of TC degradation. This study offers a promising method for designing photocatalytic systems to break down antimicrobial contaminants.
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Journal of Energy Storage
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2024
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IF 8.9
Kanjun Sun,Xiaofei Lei,Xuan Xie,Wenjuan Li,Wenbo Hou,Hui Peng,Guofu Ma
Rational design of inexpensive and durable bifunctional oxygen catalysts is essential to facilitate the commercialization of Zn-air batteries. Hence, we report an electrocatalyst with bifunctional catalytic activity, namely Fe species doped into N, S co-doped carbon encapsulated Co catalysts (e-Fe/Co@NSC). Benefiting from the hierarchical porous structure and multiple adsorption sites, the optimized e-Fe/Co@NSC-20 exhibits excellent oxygen evolution reaction (OER) performance, requiring only overpotential of 282 mV to drive a current density of 10 mA cm −2 . More importantly, the e-Fe/Co@NSC-20 also exhibited excellent oxygen reduction reaction (ORR) performance with a half-wave potential of 0.816 V, successfully revealing that it has excellent bifunctional properties. Moreover, Zn-air battery assembled with e-Fe/Co@NSC-20 catalyst as air electrodes have high open-circuit voltage (1.472 V), power density (136 mW cm −2 ) and specific capacity (639 mAh g −1 Zn ), outperforming Pt/C + RuO 2 -based Zn-air battery. This study provides constructive assistance in the design of electrocatalysts with bifunctional properties for Zn-air battery.
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高影响因子
ENERGY & FUELS
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2025
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IF 5.3
Zhuo Chen,Ze Zhang,Rongxin Xia,Junhu Zhou,Jun Cheng
To improve the conversion rate of carbon dioxide (CO2) to methane (CH4) in a microbial electrochemical system (MES), the zeolitic imidazolate framework ZIF-67(Co) with electron storage properties was first grown in situ on MIL-100(Fe) with excellent CO2 adsorption properties by a hydrothermal method. The obtained binary core–shell MIL@ZIF material was then adsorbed by carbon felt on a cathode to grow biofilms composed of electroactive microorganisms for characterization and testing in an MES. This system exhibited a CH4 production rate of 0.42 mmol LR–1 d–1, along with an impressive faradaic efficiency of 96.4%. Three-dimensional excitation–emission matrix spectra of extracellular polymeric substances indicated that those containing higher contents of humic acid shifted electron pairs and converted redox states to facilitate electron transfer. MIL@ZIF enriched hydrogenotrophic methanogens and electrogenic bacteria in microbial communities with enhanced gene expression of electrically conductive pili and cytochrome C to strengthen interspecies electron transfer. MIL@ZIF enhanced CO2 adsorption and electron storage, reinforcing electron transfer chains and boosting CH4 yield by a factor of 10.7.
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高影响因子
Biosensors-Basel
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2024
·Vol. 14
·期 1
·38
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IF 4.9
Qiaolin Fan,Xiao Li,Hui Dong,Zhonghua Ni,Tao Hu
Graphene and graphene-like two-dimensional layered nanomaterials-based photoelectrochemical (PEC) biosensors have recently grown rapidly in popularity thanks to their advantages of high sensitivity and low background signal, which have attracted tremendous attention in ultrahigh sensitive small molecule detection. This work proposes a non-enzymatic and visible-light-sensitive PEC biosensing platform based on ZIF-67@MoS2/rGO composite which is synthesized through a facile and one-step microwave-assisted hydrothermal method. The combination of MoS2and rGO could construct van der Waals heterostructures, which not only act as visible-light-active nanomaterials, but facilitate charge carriers transfer between the photoelectrode and glassy carbon electrode (GCE). ZIF-67 anchored on MoS2/rGO heterostructures provides large specific surface areas and a high proportion of catalytic sites, which cooperate with MoS2nanosheets, realizing rapid and efficient enzyme-free electrocatalytic oxidation of glucose. The ZIF-67@MoS2/rGO-modified GCE can realize the rapid and sensitive detection of glucose at low detection voltage, which exhibits a high sensitivity of 12.62 μAmM−1cm−2. Finally, the ZIF-67@MoS2/rGO PEC biosensor is developed by integrating the ZIF-67@MoS2/rGO with a screen-printed electrode (SPE), which exhibits a high sensitivity of 3.479 μAmM−1cm−2and a low detection limit of 1.39 μM. The biosensor’s selectivity, stability, and repeatability are systematically investigated, and its practicability is evaluated by detecting clinical serum samples.Keywords:ZIF-67;2D material;non-enzymatic;heterostructure;visible-light sensitive;photoelectrochemical biosensing
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Sihan Ai,Yong Xiang,Xue Chen,Yanlin Zhang,Yufei Zhang,Kangning Lv,Xin Chen,Daoyong Yu,Baosheng Ge,Fang Huang
Carbon dioxide capture, utilization and storage (CCUS) technology is considered an effective solution to achieve carbon neutrality. In CCUS, chemical absorption stands out as an efficient CO 2 capture method suitable for environments with low CO 2 partial pressures. This study aims to enhance the CO 2 capture performance of monoethanolamine (MEA) solution by employing zeolitic imidazolate frameworks ZIF-8 and ZIF-67 as catalysts. The impacts of catalyst concentration and experimental temperature on the quantity, rate of absorption, rate of desorption, and reusability of MEA for CO 2 absorption were investigated. Changes in the volume concentration of CO 2 in the mixed gas were monitored to assess these parameters. The results demonstrated that at a catalyst concentration of 150 mg/mL for ZIF-8 and 125 mg/mL for ZIF-67, MEA achieved CO 2 absorption quantity of 22.22 % and 18.89 %, respectively. This corresponded to substantial increases of 63.39 % and 125.9 % in the CO 2 maximum absorption rate of MEA solution. While the maximum desorption rate of MEA was enhanced by 49.71 % and 83.28 %. In conclusion, the introduction of ZIF-8 and ZIF-67 catalysts effectively catalyzed the CO 2 capture process, significantly enhancing the CO 2 capture quantity of MEA and ensuring energy-efficient regeneration of MEA. This study provides a novel approach for improving the performance of MEA in terms of capturing CO 2 .
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MOLECULES
·
2024
·Vol. 29
·期 8
·1833
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IF 4.2
Chen Cheng,Hanyan Wu,Xinyang Chen,Shuiping Cai,Yingkang Tian,Xiaofei Yang,Xuejie Gao
Lithium–sulfur (Li-S) batteries have received much attention due to their high energy density and low price. In recent years, alleviating the volume expansion and suppressing the shuttle effect during the charge and discharge processes of Li-S batteries have been widely addressed. However, the slow conversion kinetics from polysulfide (LiPSs) to Li2S2/Li2S still limits the application of Li-S batteries. Therefore, we designed a ZIF-67 grown on cellulose (named ZIF-67@CL) as an electrocatalyst to improve the interconversion kinetics from LiPSs to Li2S2/Li2S for Li-S batteries. Based on the results of adsorption experiments of LiPSs, ZIF-67@CL and CL hosts were immersed in Li2S4solution to adsorb LiPSs, and the UV-Vis test was conducted on the supernatant after adsorption. The results showed that the ZIF-67@CL had a stronger adsorption for LiPSs compared with the cellulose (CL). Furthermore, in the Li2S nucleation tests, the fabricated cells were galvanostatically discharged to 2.06 V at 0.112 mA and then potentiostatically discharged at 2.05 V. Based on the results of Li2S nucleation tests, the catalytic effect of ZIF-67 was further verified. As a result, the sulfur cathode used a ZIF-67 catalyst (named S/ZIF-67@CL) and delivered an initial capacity of 1346 mAh g−1at a current density of 0.2 C. Even at a high current density of 2 C, it exhibited a high-capacity performance of 1087 mAh g−1on the first cycle and maintained a capacity output of 462 mAh g−1after 150 cycles, with a Coulombic efficiency of over 99.82%.
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PubMed
高影响因子
ELECTROCHIMICA ACTA
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2024
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IF 5.5
Lidong Jiao,Mingshu Zhao,Zhou Su,Mangmang Shi,Min Li,Feng Li
Supercapacitors have received widespread attention from scientific researchers due to the advantages of high power density, fast charging/discharging rate and long cycle life. Among them, the development of high performance and high safety electrode materials are important research topics in the field of supercapacitors. Herein, zeolitic imidazolate framework (ZIF) derivatives is a good candidate material for supercapacitors electrode because of its controllable pore rate, constant cavity and larger specific area. However, the reunion phenomenon and the damaged structure during the reaction seriously affected its electrochemical properties, especially its stability. To solve this problem, the few-layer MXene was added into ZIF-67 to inhibit the reunion of single materials and the carbonization process was operated to improve its conductivity and structure stability. In addition, the CoNi 2 S 4 /carbon/MXene (CNS/C/MXene) obtained by the solvent thermal method successfully inherited the hollow cages structure and rough surface from the precursor, expressing a better electrochemical performance. In three-electrode system, the CNS/C/MXene electrode can exhibit the specific capacitance of 1221.6 F g −1 (169.7 mAh g −1 ) at 1 A g −1 and still maintain a high capacitance of 966.4 F g −1 (134.2 mAh g −1 ) at 20 A g −1 (79.1 % of the former). After assembling it with activated carbon into asymmetric supercapacitor, the device can provide a high energy density of 19.82 Wh kg −1 at a power density of 469.31 W kg −1 and maintain about 71.17 % of the initial capacitance after 30,000 cycles under a current density of 20 A g −1 , representing excellent cycle stability and rate capability.
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Materials Today Nano
·
2025
·
IF 8.2
Haotian Jiang,Yanxiang Wang,Chengjuan Wang,Shichao Dai,Bohan Ding,Jinghe Guo,Yue Sun,Dongming Liu,Hui Li
Exploring the synergistic effects of components and structures has emerged as a pivotal strategy for advancing high-performance electromagnetic wave (EMW) absorbing materials. In this work, we present an approach that integrates magnetic-dielectric components and porous structures by incorporating unidirectionally frozen-drying aramid nanofiber aerogels with ZIF-67 and subsequently preparing Co/Co 3 O 4 @carbon nanotubes/carbon nanofibers aerogels through heat treatment and catalyst chemical vapor deposition. By combining different functional components, a multiple heterostructure with excellent absorption capacity, wide effective absorption bandwidth (EAB), and thin thickness can be achieved. The inclusion of the magnetic-dielectric component significantly enhances the impedance matching, generating multiple loss mechanisms. Additionally, the three-dimensional porous structure of the aerogel facilitates multiple reflections and scattering of the incident EMWs, thereby enhancing the microwave absorption. Specifically, the obtained samples exhibit outstanding EMW performance, with a minimum reflection loss of −73.50 dB at a thickness of merely 2.08 mm and an EAB of 5.90 GHz. Furthermore, simulations evaluating radar cross-section values, electric field strengths, and energy loss density are conducted to assess the stealth capabilities under radar detection. This study culminates in the preparation of an aerogel characterized by excellent wave-absorbing properties and effective thermal insulation, offering vast potential for practical applications.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Junya Wang,Chenxi Ma,Shikun Wen,Ping Ning,Yu Zhang,Yi Liu
This study synthesized a composite material of ZIF-67 and black titanium (BT) with high CO 2 reduction capability via a mechanochemical method. Through in-depth analysis of the morphology, structure, optical properties, and electrochemical behavior of the ZIF-67-BT composite photocatalyst, it was confirmed that the composite successfully formed an S-scheme heterojunction structure. This configuration can effectively separate photogenerated charge carriers, resulting in superior CO 2 reduction performance. The findings indicate that the composite material has optimal catalytic performance when the ZIF-67 doping content reaches 30 wt% (30 %ZIF-BT). Within 5 h, 30 %ZIF-BT exhibited excellent photocatalytic activity, with CO and H 2 yields reaching 2486.4 μmol·g −1 and 3495.0 μmol·g −1 , which were 44.0 and 29.4 times greater than the yields of BT, and 2.4 and 1.4 times than ZIF-67. The syngas (comprising CO and H 2 ) generated by ZIF-BT, with an adjustable CO to H 2 ratio ranging from 1:1.40 to 1:2.47, is regarded as a significantly beneficial and crucial intermediate for further conversion into valuable hydrocarbon fuels via Fischer-Tropsch synthesis. This research offers a feasible method to construct S-scheme heterojunction in ZIF-BT composite materials.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Han Zhang,Mianyu Bao,Chun Xu,Meng Xu,Yan Yuan,Yanmao Dong,Jie Liu,Xiangkang Meng,Li Jiang
Sustainable corrosion protective coatings are essential for industrial applications. Herein, graphene oxide (GO) was successfully decorated with ZIF-67 nanoparticles to form ZIF-67/GO (ZG) hybrids, which were employed as nanofillers for the dispersed carbon nanotube enhanced waterborne acrylic epoxy coating (DCE). The electrodeposited polypyrrole (PPY) film was then electrodeposited on the coating layer, resulting in a new anticorrosive coating (ZG/DCE/P) with self-healing functionality. The properties of ZG/DCE/P coating and PPY-free ZG/DCE coating were characterized in terms of morphology and microstructural properties, as well as the anticorrosion behavior. Compared to ZG/DCE coating, the composite ZG/DCE/P coating presented a substantial enhancement in the corrosion resistance, and the corrosion protection ability of this coating system were found to remain stable up to 30 days. The durable anticorrosion performance of the ZG/DCE/P coating stems from the synergistic effect of passive/active corrosion resistance mechanisms inherent in each coating component. The incorporation of ZG fillers increased the cross-linking density of the epoxy resin and prolonged the inward diffusion path of corrosive species; while the dense PPY layer not only acted as a barrier but also slowed the premature loss of corrosion inhibitors. The study provides new insights into the development of multifunctional anticorrosive coatings for engineering applications.
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高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Jing Lin,Lianshan Sun,Zhanyi Cao,Dongming Yin,Fei Liang,Yaoming Wu,Limin Wang
We describe our recent progress on a novel method to prepare Ti 1.4 V 0.6 Ni hydrogen storage alloy covered with nanostructured Co 3 O 4 by utilizing zelolitic imidazolate framework 67 (ZIF-67) as the template. Ti 1.4 V 0.6 Ni@C@Co 3 O 4 composite is prepared through a dopamine self-polymerization and a facile precipitation reaction with the subsequent thermal treatment. This specific composite structure combines the high conductivity of carbon together with the promising catalytic property of nanostructured Co 3 O 4 , therefore the enhanced electrochemical activity and stability are realized. As a result, Ti 1.4 V 0.6 Ni@C@Co 3 O 4 composite electrode possesses a capacity conservation rate of 56.1% after 300 charging/discharging cycles, remarkably larger than that of Ti 1.4 V 0.6 Ni (25.3%). Moreover, a study of the kinetics demonstrates that nanostructured Co 3 O 4 coating accelerates the charge-transfer reaction of the electrode. These results prove that coating with carbon and nanostructured Co 3 O 4 is a potential method for enhancing electrochemical hydrogen storage properties of hydrogen storage alloys.
研究领域:
材料科学
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电化学
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能源存储
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金属氢化物电池
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纳米材料
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高影响因子
危险品化学品经营许可证（带存储）