Journal of Materials Chemistry C
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2024
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IF 5.7
Shizhen Song,Tengfei Zheng,Bo Li,Hangcheng Yang,Qin-Xiang Jia,Zhuting Hao,Wen Zhang,Ying Zhang
Solvent vapor-driven soft actuators have been seen as promising devices for human-environment interaction and gained considerable attention in recent years. Considering the limited types of response solvent and the lack of quantification, MOF/polymer intelligent soft actuators may be a potential candidate of the fabrication of the bio solvent-driven actuators. Thus, this paper present a multiple solvent-driven soft actuator based on MIL-88B/PVDF asymmetric film, and also the comparison to the analogs based on other MIL-88(Fe) series flexible MOFs (including MIL-88A, 88C and 88D) was made for the deformation-structure relationship and the solvent-driven mechanism investigation. The deformation behavior to various organic solvent (including methanol, toluene and chloroform) of the MIL-88(Fe)/PVDF composite films have been investigated, and the structure and composition of the MIL88(Fe) fillers and the composite films were also characterized by SEM, FT-IR, and XRD. Based on the above results, the MIL-88B/PVDF composite which shows the diversity of response objects and the fast deformation response to most of the organic solvents through the solvent swelling/adsorption of the MOF skeleton, was used to fabricate a monolayer soft film composed by MIL-88B, carbon black (CB) and PVDF, namely MIL-88B/CB/PVDF. The MIL-88B/CB/PVDF film not only realizes the excellent deformation-discolor dual-responsive to methanol atmosphere with the visible deformation which could being quickly achieved within 1s under 10 vol % methanol atmosphere and the maximum crimp angle being up to 558o within about 50 s, and also a wide color change range including six view angle-dependent high saturation color (red, orange, yellow, green, blue and purple), but also shows an approximate linear relationship to three of the organic solvents (methanol, toluene and chloroform) between the maximum curl angle and the solvent concentration. Furthermore, several smart devices have also been fabricated, including the methanol-driven bionic petals, worm robot, alertor and LIG sensor. Therefore, such soft composites of flexible MOF and polymer have great potential in bio-robot and this work may provide new design strategy for the MOFs/polymer smart materials.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Journal of Materials Chemistry A
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2021
·Vol. 9
·期 14
·9048-9055
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IF 12.732
Xu Ma,Zhuoyi Li,Zheng Deng,Danke Chen,Xiaobin Wang,Xinyi Wan,Zhou Fang,Xinsheng Peng
Although solar vapor desalination via interface water evaporation (SDWIE) from seawater and evaporation-induced electricity generation from pure water or low concentration salt water, respectively, have been realized separately in different systems, cogenerating drinkable water and electricity from seawater via one device simultaneously is more desirable but still challenging. In this work, a flexible Cu-CAT-1 MOF nanorod array membrane with controllable 2D/3D structures is rationally designed via a facile solid conversion process at room temperature. The Cu-CAT-1 nanorod arrays anchor on filter paper via a thin gelatin layer. Due to unique hierarchical architectures, superior solar absorption, good photothermal conversion, high zeta potentials and outstanding hydrophilicity, the resulting membrane constructed 3D SDIWE device simultaneously displays extraordinary solar desalination performance (2.07 kg m−2 h−1 based on the projected area) and nice all-weather electricity output (18.2 mW m−2) using simulated seawater. It can power up small electronic devices such as calculators, timers and light-emitting diodes (LEDs). This provides a novel avenue for the design of drinkable water and electricity cogeneration devices.
研究领域:
材料科学
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能源工程
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环境科学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
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IF 3.375
Xiao-Wei Liu,Yi-Ming Gu,Tian-Jun Sun,Ya Guo,Xiao-Li Wei,Sheng-Sheng Zhao,Shu-Dong Wang
The highly efficient separation of CH4/N2 remains a great challenge, but it is vital to make the most of diverse natural gas resources and contributes to mitigating global warming. In this work, two isostructural metal–organic frameworks (MOFs), M-MA-BPY where M is Co and Ni, were elaborately selected and synthesized to serve the purpose. These MOFs were thoroughly characterized and found to have favorable framework flexibility, endowing them with narrow and uniform pore networks suitable for the adsorptive separation of CH4/N2. Further studies revealed the M-MA-BPY MOFs’ excellent stability toward water and moist air. Pure gas adsorption experiments suggested they have decent CH4 capacities (0.92 and 1.01 mmol·g–1 for Co- and Ni-MA-BPY), prominent CH4/N2 selectivities (7.2 and 7.4 for Co- and Ni-MA-BPY, IAST selectivity with equimolar CH4/N2 gas mixture) at 298 K and 1 bar, and desirable heats of adsorption for CH4 (22.8 and 23.5 kJ·mol–1 for Co- and Ni-MA-BPY). Dynamic breakthrough experiments and multiple adsorption–desorption cycling tests for CH4/N2 binary mixtures with different gas ratios of 5:95, 15:85, 30:70, and 50:50 (v/v) confirmed the high separation performance of M-MA-BPY MOFs. Together with their relatively simple synthesis and cheap raw reagents, this work demonstrates M-MA-BPY MOFs are very promising adsorbents for the capture of methane from low-quality natural gas resources in ambient conditions.
研究领域:
化学工程
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材料科学
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环境科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Lei Shi,Fan Xiang,Kexin Liu,Wulong Li,Zhanxiong Li
Metal-organic frameworks (MOFs) show great potential applications in dealing with heavy metal pollution due to their unique large specific surface area, tunable pore size, and diverse active groups. However, the powder form of MOFs has suffered from the disadvantages of difficult recycling and secondary contamination after adsorption of heavy metals, which seriously limits their practical application. Therefore, in this work, we prepared a series of bifunctional zirconium-based MOFs cotton fabric composites (MCFC) via in situ growth of MOFs on carboxylated cotton fabric, exhibiting large specific surface area, adjustable pore size, and effective adsorption ability. The prepared CF-UiO-66-(OH) 2 -FA shows an excellent adsorption efficiency of Au(III) more than 99.990 %, and the saturated adsorption amount is up to 190.98 mg·g −1 at 25 °C. Meanwhile, the kinetic experiment analysis demonstrated that the Au(III) adsorption behavior of MCFC follows pseudo-second-order (PSO) kinetic model. More importantly, it also exhibits great selectivity in adsorbing Au(III) from the mixture of multiple metal ions coexisted solution. The results of adsorption thermodynamics and adsorption isotherms indicate that adsorption is monolayer and a spontaneous, exothermic process. And the ideal adsorption and separation process could be finished by quickly filtrating with a single or multi-layer MCFC. Excellent adsorption performance even after four cycles of adsorption. Therefore, the fabricated MCFC shows great processability, flexibility, collectability and reusability in adsorbing and recycling precious metal ion from wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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废水处理
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产品关联
DOI
高影响因子
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