MATERIALS CHEMISTRY AND PHYSICS
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2024
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IF 4.3
Yiwen Li,Cuicui Hu,Shikuan Xu,Qi Guo,Pengfei Qi,Rong Li,Yanjun Xing
The removal of organic dyes from wastewater is crucial for environmental protection and water treatment. In this study, a ZIF-8/poly(vinyl alcohol) (PVA) composite was prepared for highly efficient dye adsorption using the contra-diffusion method. We investigated the conditions for ZIF-8-PVA to adsorb congo red (CR), including the influences of contact times, initial CR concentrations, pH values, and cyclic use. The results demonstrated that ZIF-8-PVA had a high Brunauer-Emmett-Teller (BET) surface area of 1704.03 m 2 /g. It exhibited a high removal efficiency of 98.43 % for CR, and its maximum adsorption capacity was 829.39 mg/g. After six cycles of adsorption, the removal efficiency of CR remained over 94.36 %. The removal efficiency of CR under a range of pH from 3 to 10 was consistently over 96.30 %. Moreover, ZIF-8-PVA also displayed adsorption capacity for various cationic and anionic dyes. The adsorption process aligned well with both the Langmuir model and the pseudo-second-order kinetic model. Based on FTIR, XPS, and swelling degree analyses, the adsorption mechanism was elucidated. Due to its universality and reusability, ZIF-8-PVA is suitable for practical application.
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IEEE SENSORS JOURNAL
·
2024
·Vol. 24
·期 5
·6078-6084
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IF 4.3
Zhitao Duan,Fangrong Hu,Shangjun Lin,Jie Chen,Longhui Zhang,Mingzhu Jiang
Acetone gas can give rise to serious harm to the ecological environment and human health. In addition, acetone gas in the human exhaled breath can be used as an important biomarker for diabetes, lung cancer, lipid peroxidation, and other diseases. Therefore, detection of trace acetone gas is important for environment monitoring and disease diagnosis. Here, a four-split-ring-resonator terahertz (THz) metasurface sensor is proposed to detect trace acetone gas with high sensitivity, and the sample is fabricated using micromachining process. A new metal–organic framework (MOF) material zeolitic imidazolate framework-90 (ZIF-90) is modified on the surface of the sensor to improve its specificity for acetone gas. When the concentration increases from 10 to 100 ppm, the frequency shift of the sensor shows good linearity with the concentration. The minimum measurable concentration is 10 ppm, and the sensitivity is 0.1 GHz/ppm (or 10 ppm/GHz). This work paves a way for developing novel biosensors with high sensitivity and specificity, and it has potential applications in the fields of trace gas detection and disease diagnosis at early stage.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 25
·期 19
·10346
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IF 4.9
Jiadong Hu,Jiaxin Li,Qunqun Guo,Guicai Du,Changming Li,Ronggui Li,Rong Zhou,Hongwei He
Dopamine (DA) is a widely present, calcium cholinergic neurotransmitter in the body, playing important roles in the central nervous system and cardiovascular system. Developing fast and sensitive DA detection methods is of great significance. Fluorescence-based methods have attracted much attention due to their advantages of easy operation, a fast response speed, and high sensitivity. This study prepared hydrophilic and high-performance CdS/ZnS quantum dots (QDs) for DA detection. The waterborne CdS/ZnS QDs were synthesized in one step using the amphiphilic polymer PEI-g-C14, obtained by grafting tetradecane (C14) to polyethyleneimine (PEI), as a template. The polyacrylonitrile nanofiber membrane (PAN-NFM) was prepared by electrospinning (e-spinning), and a metal organic frame (ZIF-8) was deposited in situ on the surface of the PAN-NFM. The CdS/ZnS QDs were loaded onto this substrate (ZIF-8@PAN-NFM). The results showed that after the deposition of ZIF-8, the water contact angle of the hydrophobic PAN-NFM decreased to within 40°. The nanofiber membrane loaded with QDs also exhibited significant changes in fluorescence in the presence of DA at different concentrations, which could be applied as a fast detection method of DA with high sensitivity. Meanwhile, the fluorescence on this PAN-NFM could be visually observed as it transitioned from a blue-green color to colorless, making it suitable for the real-time detection of DA.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
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IF 8.3
Luoming Kang,Bin Jiang,Xiaoming Xiao,Longfei Zhang,Xiaodong Yang,Na Yang,Yongli Sun,Luhong Zhang
Liquid organic hydrogen carrier (LOHC) systems require efficient, low-cost catalysts for scalable hydrogen storage. Here, a reusable CoNi bimetallic catalyst was developed through one-step reductive pyrolysis of ZIF-67-L, forming CoNi alloy nanoparticles embedded in a 3D carbon nanosheet/nanotube (CNS/CNT) heterostructure. Using N-ethylcarbazole (NEC) as a model compound, the optimized catalyst enables rapid hydrogenation (5.72 wt% H 2 uptake at 150 °C, 8 MPa in 80 min) and dehydrogenation (5.64 wt% H 2 release at 220 °C, 0.1 MPa), with high recyclability over seven cycles. The CNS/CNT facilitates electron transport, enhances active site exposure, and provides a high surface area. Combined XPS and DFT results reveal that the synergy between the CNS/CNT architecture and CoNi alloying modulates the electronic environment of Co 0 sites, reduces the energy barrier for H 2 dissociation, and improves catalytic performance. This study provides new insights into the design of highly active and stable non-noble metal catalysts for LOHC systems to achieve reversible hydrogen storage.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Sheng Dafei,Li Xinlin,Huang Xin,Ma Dou,Sun Chao,Zhu Yuhao,Wang Xiaoqi,Wang Zhipeng,Feng Xiao,Zhao Shuang,Wang Bo
Seawater desalination and wastewater purification from brackish water, shale gas extraction, and industrial processes remain vital but challenging. Membrane distillation offers a promising solution yet struggles with low flux, membrane fouling, and the permeation of volatile organic compounds alongside water vapor. Here, we introduce an omniphobic ZIF-8 composite membrane that traps volatile organic compounds under vacuum through crystal phase transitions and enhances water evaporation via linkage swing within hydrophobic micropores. This membrane, with a 92% ZIF-8 loading, fabricated through thermally induced phase separation, hot-pressing, and surface coating, can process over 38,000 L of water with 10 ppm contaminants per square meter without needing reactivation. Achieving a normalized flux of 71.8 L m –2 h –1 bar –1 , it outperforms conventional membranes by fivefold in treating 10.5 wt% saline water, while maintaining excellent cyclic stability over 900 h and high anti-fouling properties. This work presents an effective approach for sustainable water purification.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Mao Ye,Hexiang Huang,Lei Tian,Xiujing Zhang,Ziyao Wang,Chenxu Zhang,Zhihua Qiao
Separation of CH 4 and N 2 from natural gas is essential to increase energy efficiency and reduce environmental impact. In this work, we prepared novel mixed matrix membranes (MMMs) for CH 4 /N 2 separation using ion-exchange-modified molecular sieves as fillers and metal–organic framework (MOF) glass as substrates. The modification of molecular sieves enhanced the gas separation capability of the MMMs. And the MOF glass as a matrix has good compatibility with the filler. The membrane achieved a CH 4 permeance of up to 271.4 GPU and a CH 4 /N 2 selectivity of 7.35. The membrane was able to maintain stable separation performance under certain pressures and over a long testing period. The design of this study provides an innovative approach to advancing natural gas applications.
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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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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Rashida Shahbaz,Tianyou Li,Yongchao Sun,Samrina Sharif,Gaohong He,Canghai Ma
Mixed matrix membranes (MMMs) have emerged as promising materials for hydrogen separation, combining the processability of polymers with enhanced permeability and selectivity offered by inorganic fillers. However, challenges such as filler aggregation and poor polymer-filler interfacial compatibility limit their performance. In this study, amino-modified bimetallic ZIF (Zn/Co-ZIF-NH 2 ) was synthesized and employed as a novel nanofiller to fabricate 6FDA-DAM-based MMMs, aiming to improve interfacial compatibility between the filler and the polymer matrix. The incorporation of Co 2+ ions into ZIF-8-NH 2 introduced a synergistic effect, optimizing the balance between the rigidity and flexibility of metal-to-ligand bond linkage, while amino groups promoted robust interfacial interactions with the polymer matrix. Compared to the pure polymeric membrane, the MMMs incorporating 40 wt% MOF exhibited a significant enhancement in gas permeability, with H 2 permeability rising from 750 to 3273 Barrer and CO 2 permeability increasing from 840 to 2733 Barrer, corresponding to improvements of 336.4 % and 225 %, respectively. Simultaneously, H 2 /CH 4 and CO 2 /CH 4 selectivities increased to 33.7 and 28.1, representing improvements of 88.3 % and 41 % over the pristine polymer. These performance metrics exceed the 2008 Robeson upper bounds, demonstrating the effectiveness of Zn/Co-ZIF-NH 2 nanofillers in overcoming the permeability–selectivity trade-off. This study underscores the effectiveness of amino-modified bimetallic MOFs as advanced fillers for high-performance MMMs, particularly suited for hydrogen purification and CO 2 separation applications.
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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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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Yu Zhang,Runjie Miao,Wenyan Ma,Haifeng Sha,Hangrong Chen
Aggregation-induced emission (AIE) provides a new direction for fluorescence, but dyes with AIE properties are mostly organic molecules with poor water solubility. Herein, a novel dual fluorescence emitting nanoprobe (named as CCZ) was developed by co-loading blue emitting copper nanoclusters (CuNCs) and yellow emitting curcumin (CUR) into ZIF framework for visual detection of ATP. The prepared CuNCs are featured with good water solubility, bright blue fluorescence, and AIE property. After encapsulation within ZIF-8, CuNCs@ZIF can obviously increase the fluorescence quantum yield (10.15%), fluorescence intensity (4.29 times that of pure CuNCs), and fluorescence stability (only 10% fluorescence decay after seven days sunlight). Based on the stronger coordination between ATP and Zn 2+ , a novel dual fluorescence responsive probe CCZ was constructed by loading curcumin to perform ratio fluorescence combined with colorimetric dual-mode detection of ATP, with the limit of detection (LOD) of 7.5 μM and 0.2 μM, respectively, presenting high specificity for ATP. More interestingly, it could achieve naked eye semi-quantitative sensing of ATP based on the color change, showing great potentials for application in the detection of real samples.
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POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Jing Wang,Wei Liu,Xinyi He,Yingjie Li,Fukai Chu,Yanbei Hou,Weizhao Hu,Lei Song,Yuan Hu
Conventional intumescent flame retardants typically generate localized hypoxic environments within the char layer, leading to incomplete carbonization and substantial CO emission, particularly in intrinsically flammable polyolefins. Metal oxides, owing to their high catalytic activity and tunable redox states, have emerged as promising additives for smoke suppression and toxicity mitigation in polyolefin systems. However, excessive catalytic activity can concurrently accelerate oxidative decomposition of the protective char. Inspired by the protective architecture and stimuli-responsive release of natural seeds, we report a bioinspired interfacial chemical engineering strategy to construct a core–shell Co 3 O 4 @ZIF-8 catalyst. This confinement architecture enables spatiotemporal decoupling of char formation and CO oxidation. During early combustion, the catalyst facilitates the rapid formation of a compact char barrier serving as an efficient thermal shield. Upon reaching elevated temperatures, Co 3 O 4 becomes exposed via the ZIF-8 carrier, efficiently catalyzing CO oxidation and markedly reducing toxic emissions. This strategy achieves a 91.7% reduction in the peak heat release rate (PHRR), 83.9% decrease in total heat release (THR), and 54.1% reduction in CO emission, while delivering outstanding flame-retardant performance (LOI=32%, UL-94 V-0 rating). Collectively, this work establishes a bioinspired core–shell confined catalyst for simultaneous fire safety and toxicity suppression in flame-retardant polypropylene.
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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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