Applied Materials Today
·
2024
·
IF 7.2
Chao Su,Zexuan Wu,Jing Zhang,Kaiyang Li,Yanqiang Kong,Naiqiang Zhang,Yongping Yang
Efficient freshwater production techniques are urgently required to address the global water-scarcity problem. The solar-driven atmospheric water harvesting (AWH) technology, which can capture water vapour from ambient air and release it under sunlight, is a sustainable and feasible strategy for obtaining fresh water. The key to achieving high water harvesting lays in the dynamic adsorption properties of the material and the heat and mass transfer characteristics of the device structure. Therefore, this paper reports a core-shell structured material, UiO-66@MIL-101(Cr) (U@M), where the outer layer exhibits excellent water-adsorption characteristics under arid conditions, and the inner layer exhibits high water-adsorption characteristics under high humidity conditions. These inner and outer layer materials are assembled into a core-shell structure while considering the water-harvesting features of both sides, achieving synergistic enhancement of the AWH performance at low relative humidity (RH). Experimental results demonstrate that at 25°C and 30 % RH, the novel core-shell structured material achieves a high water-harvesting capacity of 0.408 g g −1 and excellent stability in 50 operating cycle tests. At the system level, we have developed a solar-driven AWH device based on the synthesised core-shell material. Daytime and night-time experimental tests were conducted in outdoor environments, resulting in a water production rate exceeding 1.336 kg m − ² day − ¹, with the collected water meeting the standards for laboratory-grade pure water. The research findings can be applied to alleviate water issues in arid regions, such as residential water supply, industrial electrolysis for hydrogen production and other fields, showing broad application prospects.
研究领域:
材料科学
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环境科学
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水资源工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Qian Liu,Changdi Wang,Hao Wang,Lu Li,Xingrong Zhang,Ruiyang Zhao,Jishu Han,Lei Wang
Hydrogen energy produced through photocatalytic water splitting is widely recognized as a viable solution to the depletion of non-renewable energy resources and ecological contamination concerns. This work designed and synthesized the MOF-derived hollow octahedral Co x P/MOF-801 p-n heterojunction photocatalyst . According to the result of hydrogen production test, the hydrogen production amount of Co x P/MOF-801-2 could reach 25.31 mmol g −1 under light irradiation for 5 h. The hollow octahedral structure and p-n heterojunction of the photocatalyst helped to enhance the light trapping ability and promote carrier transfer, resulting in improved performance of photocatalytic hydrogen production. To sum up, the design of hollow octahedral Co x P/MOF-801 photocatalyst effectively improved the photocatalytic hydrogen production performance.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
Nanoscale
·
2025
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IF 5.1
Zhiguang Guo,Guangyi Tian,Changhui Fu
Water scarcity has become one of the largest crises in the world, especially for people living in arid areas. Among all water sources, atmospheric water has the advantages of less geographical limitation and less environmental impact of the water production process. The use of solar-powered atmospheric water harvesting (AWH) has become a viable solution to the problem of water scarcity in arid regions. MOF-303 is a robust and water-stable MOF that collects water at low relative humidity (RH ≤ 30%) and releases it under mild heating. However, its actual demonstrated water absorption remains unsatisfactory, which limits its application in the field of water harvesting. Here, we propose a high-performance composite adsorbent of hygroscopic salt-modified MOF, and obtain the composite adsorbent MOF-303@LiCl by confining LiCl in the pores of MOF-303. The composite adsorbent exhibited excellent water absorption of 0.61 g g-1 at low relative humidity (25℃, 30% RH) and high adsorption kinetics (adsorption saturated at 80 min). By adding a certain proportion of the photothermal material CB, MOF-303@LiCl could be heated up to 66.1℃ under one solar irradiation and achieved desorption within 60 min. The adsorption-desorption cycle of this composite adsorbent can be fed by natural sunlight without the need for optical focusing and additional energy input. The fast adsorption-desorption kinetics allow for multiple cycles of AWH in a single day, which has great potential in water harvesting.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
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IF 9.965
Tingting Wei,Liyang Wang,Kaihui Mao,Jian Chen,Jun Dai,Zhiyong Zhang,Lizhe Liu,Xinglong Wu
Rapid recombination of photogenerated carriers severely impairs the performance of photocatalysts , while polarization is an effective driving force for increasing the charge separation and hence improving the photocatalytic activity . In this work, a series of magnetoelectric-coupled layered metal–organic framework (MOF) catalysts with different Co-doped contents (denoted as Ni-MOF and Co x Ni 1-x -MOF) are fabricated with different polarities and employed as novel photocatalysts for CO 2 photocatalytic reduction reaction. Our experiments show that the highest charge separation efficiency occurs in the Co 0.1 Ni 0.9 -MOF sample which has a maximal polarization. This Co 0.1 Ni 0.9 -MOF material has a best CO 2 reduction performance of 38.74 μmol g −1 h −1 which is at a high level in the currently reported layered materials. Meanwhile, it is found that a series of Co x Ni 1-x -MOF samples all display selectivity close to 100% for CO 2 reduction to CO, which is desirable for industrial applications. Theoretical analysis shows that Co doping alters the degree of distortion of the asymmetrical Ni-centered octahedron {NiN 2 O 4 } in Ni-MOF by replacing Ni due to the magnetoelectric coupling effect and Jahn-Teller effect, which results in adjustable polarity of Co x Ni 1-x -MOF. This work provides new insights on how to improve photogenerated charge separation in MOF by enhancing polarization.
研究领域:
材料科学
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催化
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化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2021
·Vol. 29
·期 1
·97-102
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IF 2.496
Shen Tieyin,Zhong Mingjun,Feng Lijuan,Sui Zhuyin,Chen Qi
Metal nanoparticles (MNPs)/metal–organic frameworks (MOFs) composites have become a research hotspot because the cooperation between MNPs and MOF can effectively improve the catalytic performance. However, development of a simple method to disperse the tiny MNPs on MOF is still a great challenge. In this work, a AuPdPt/Cu-MOF composite was prepared successfully by a one-step reduction process. First, Cu-MOF with one-dimensional nanorod structure was prepared by using surfactant PVP to control morphological growth. Second, the AuPdPt/Cu-MOF composite was synthesized by reducing the metal precursor to AuPdPt nanoparticles (NPs) supported on the surface of Cu-MOF. Encouragingly, synergistic effect between Au, Pd, and Pt, along with high dispersion of AuPdPt NPs on Cu-MOF nanorods, leading to excellent catalytic activities toward the benzyl alcohol with a conversion rate of 66%. Thus, this simple strategy to design promising MNPs/MOF composite can provide various opportunities in the field of catalysis.
研究领域:
材料科学
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催化
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纳米技术
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
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IF 6.393
Lan Guo,Yuan Liu,Rongmei Kong,Guang Chen,Hao Wang,Xiuli Wang,Lian Xia,Fengli Qu
β-Glucuronidase (β-GCU) is closely related to the occurrence of multiple diseases, and it has been applied as a biomarker and therapeutic target in clinical diagnosis. However, reliable methods with high selectivity and sensitivity for monitoring β-GCU are still lacked. Herein, we designed a novel fluorescent nanoprobe, rhodamine B encapsulated MOF-5 (RhB@MOF-5) for the first time, to detect β-GCU through the synergistic effect of inner filter effect (IFE) and static quenching effect (SQE) by employing 4-nitrophenyl-β-D-glucuronide (PNPG) as the substrate. After encapsulating into MOF-5, the fluorescence emission of RhB at 550 nm excited by 320 nm was greatly enhanced. The major overlap between the fluorescence excitation spectrum of RhB@MOF-5 (about 320 nm) and the ultraviolet absorption spectrum of PNPG (about 310 nm) lead to PNPG being a good IFE absorber in this sensing system. Under the optimized conditions, the excitation spectrum of the RhB@MOF-5 could be absorbed by PNPG, resulting in the dramatically decrease of fluorescence emission. After adding β-GCU into the system, the substrate of PNPG would be enzymatic hydrolyzed to p -nitrophenol (PNP) and glucose, then the IFE disappearance and the fluorescence recovered. The current sensing platform was interference-free and exhibited a broad linearity relationship for β-GCU range of 0.1–10 U L −1 (R 2 = 0.9957) with a limit of detection as low as 0.03 U L −1 , which was reduced by more than one orders compared with the reported methods. Moreover, the encapsulation of dyes using porous nanoparticles to achieve some tailor-made characteristics will enrich experimental design inspiration.
研究领域:
生物化学
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医学诊断
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材料科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2024
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IF 2.7
Jiahui Li,Yufen Wang,Qinyuan Yu,Xuedong Wei
A kind of MoS2@CoFe-MOF electrocatalyst was prepared on carbon cloth by a one-pot hydrothermal method. Excellent electrocatalytic activity of MoS2@CoFe-MOF is demonstrated, and the catalyst has overpotentials of 220 mV and 405 mV at 10 mA cm−2 and 50 mA cm−2, respectively. It is found that the MoS2@CoFe-MOF electrode exhibits excellent stability at the end of operation for 48 000 s, and it has the highest electrochemically active specific surface area and the lowest charge transfer resistance. This work proposes a promising approach in energy chemistry for hydrogen production by electrolysis of water using electrocatalysts composed of non precious transition metal sulfides and bimetallic MOFs.
研究领域:
材料科学
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电化学
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能源化学
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2020
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IF 5.977
Muxin Lu,Yajuan Deng,Yuanchang Li,Tianbao Li,Juan Xu,Shu-Wei Chen,Jinyi Wang
The detection of blood glucose level receives much attention, because diabetes has become one of the significant threats to human health worldwide. In this paper, we described a novel core-shell MOF@MOF composite-based electrochemical sensor for nonenzymatic glucose sensing in alkaline media. The core-shell UiO-67@Ni-MOF composites were synthesized by internal extended growth of shell Ni-MOF on the core UiO-67 under polyvinylpyrrolidone (PVP) regulation. In the sensor system, UiO-67 with large specific surface area and good conductivity was used to accelerate the rate of electron transfer of UiO-67@Ni-MOF. Ni-MOF served as an electrocatalytic material due to excellent electrochemical activity toward glucose oxidation . The morphology, structure, and electrochemical performance of UiO-67@Ni-MOF composites were characterized. To demonstrate the detection performance of the UiO-67@Ni-MOF composite-based sensor, it was successfully used for nonenzymatic glucose sensing. The results indicated that UiO-67@Ni-MOF composites exhibited high electrocatalytic activity toward glucose oxidation compared with individual UiO-67 and Ni-MOF. Moreover, the sensor possessed high sensitivity and selectivity for real-time amperometric detection of glucose. It performed glucose level detection in human serum samples with acceptable reliability and accuracy. The present work suggested that the as-fabricated sensor is promising for nonenzymatic glucose sensing in real samples and holds great potential as an alternative tool for the rapid diagnosis of diabetes and for monitoring blood glucose levels daily.
研究领域:
生物医学工程
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材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Xiaoyu Wang,Hanlin Shao,Zhihao Chen,Xiaoshuang Yin,Yun Chen,Ying Liu,Wenzhong Yang
Herein, we presented a facile method for enhanced boron removal based on PEI-grafted defective MOF-808 (D-MOF-808/PEI). The rich Zr OH bonds, amino-functionalized surface, and exposed metal defects of D-MOF-808/PEI endow it with the high adsorption capacity of boron. Due to the ligand exchange at metal defects and boron-imine/amine groups complexation, D-MOF-808/PEI exhibits exceptional selectivity for boron with the saturation adsorption of 95.30 mmol·g −1 at 45 °C. Additionally, negligible interference from other coexistent ions and excellent reusability promote the application of D-MOF-808/PEI practically for the rapid and high selectivity removal of boron from complex environmental samples. This work furnishes a promising strategy for boron contamination and expands the application potential of defective MOF-based adsorbents for environmental remediation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Yupeng Pan,Xuewei Li,Zile Zhuang,Yihan Li,Zhiyi Wang,Qizhi Luo,Xuncai Chen
The utilization of MOF-on-MOF heterojunction materials has demonstrated exceptional functional scalability; however, their application in the realm of photocatalytic degradation remains relatively limited. This study focuses on the synthesis of a MOF-on-MOF heterojunction involving the growth of Prussian blue (PB) onto the surface of ZIF-8, with ZIF-8 serving as a seed. The optimized MOF-on-MOF heterostructure catalyst, denoted as PB@ZIF-8, exhibited a degradation efficiency exceeding 98 % across the pH range of 4.0–10 in the Fenton system under sunlight irradiation. Notably, the reaction rate constant in the PB@ZIF-8/H 2 O 2 /Sun system was 0.029 min −1 , which is 2.43 and 2.36 times higher than that of pure PB and ZIF-8. The superior performance of PB@ZIF-8 was attributed to the synergistic effect of PB and ZIF-8 in the MOF-on-MOF composite, which played a pivotal role in the tetracycline degradation process by enhancing light absorption and facilitating the separation of carriers. Furthermore, the PB@ZIF-8 catalyst exhibited exceptional stability, allowing for 5 cycles of recycling while consistently maintaining a degradation efficiency exceeding 97 %. This research not only expands the possibilities for architecting MOF-on-MOF structures but also contributes to the development of heterojunction materials for the removal of emerging pollutants from wastewater.
研究领域:
环境科学
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材料科学
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光催化
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水处理
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产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2024
·Vol. 27
·期 14
·e202300655
·
IF 2.2
Lingmei Zhang,Qian Zhao,Chao Feng,Guoning Zhang,Yucheng Wang,Yan Li,Wenjuan Sun,Hong Zhao
Graphical A cobalt-based layered MOF ([Co 2 (μ-SO 4 )(Hppza) 2 (H 2 O) 3 ] n (SEU-1) has been successfully constructed and comprehensively characterized. The maximum specific capacitance of SEU-1 is 145.5 F g −1 at 1 A g −1 , along with the specific capacitance retention of 92.7 % at the current density of 5 A g −1 after 6000 cycles in 3 M KOH solution, suggesting SEU-1 can be applied to high performance SC. Two-dimensional (2D) metal–organic frameworks (MOFs) have been a worldwide research interest due to their potential application in supercapacitors. Herein, a cobalt-based layered MOF ([Co 2 (μ-SO 4 )(Hppza) 2 (H 2 O) 3 ] n , namely, SEU-1 ; H 2 ppza=3-(pyridin-4-yl)-1 H -pyrazole-5-carboxylic acid) has been synthesized via a one-step solvothermal method. Single X-ray diffraction analysis shows that the SEU-1 exhibits a (3,3,4)-connected 2D structure with a Schläfli symbol of (6 2 ⋅ 8)(6 3 )(6 4 ⋅ 8 ⋅ 10). Variable-temperature magnetic susceptibility data display that antiferromagnetic interactions between two Co II ions exist in SEU-1 . The supercapacitive performance has been evaluated in the three-electrode system. Its maximum specific capacitance is 145.5 F g −1 at 1 A g −1 , along with the specific capacitance retention of 92.7 % at the current density of 5 A g −1 after 6000 cycles in 3 M KOH solution. These results demonstrate that SEU-1 is a good candidate for electrode material for electrochemical energy storage.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Hong Yao,Guozhe Sui,Jinlong Li,Dongxuan Guo,Jiaqi Wang,Yuanzhi Yue,Bing Jia,Xuan Xuan,Jing Tang
The construction of efficient Z-scheme heterojunctions is considered as a promising approach to improve the transfer and separation of photogenerated carries in the field of photocatalytic hydrogen evolution from water splitting. Herein, a novel ZnIn 2 S 4 /P-Ni-MOF-74 with Z-scheme heterostructure is successfully fabricated from rhombic P-Ni-MOF-74 derived from Ni-MOF-74 through phosphorization treatment and ZnIn 2 S 4 flakes via a hydrothermal method . The Z-scheme ZnIn 2 S 4 /P-Ni-MOF-74 heterojunctions can provide abundant active centers, broaden the response range to visible light region, accelerate the transfer of interfacial charges, and suppress the recombination rate of photogenerated electron-hole pairs. As a result, ZnIn 2 S 4 /P-Ni-MOF-74 (20 wt% P-Ni-MOF-74) acquires a hydrogen production rate of 7865.31 μmol g −1 h −1 , which is 4.46 times higher than that of ZnIn 2 S 4 . An apparent quantum yield is 7.84% at 420 nm wavelength. Overall, this work may provide a new pathway for the rational design of efficient Z-scheme heterojunctions with photocatalytic hydrogen evolution.
研究领域:
材料科学
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能源科学
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化学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）