Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 12
·7903-7912
·
IF 12.732
Zhiming Zhang,Hong Wu,Ying Li,Yue Liu,Chenliang Cao,Hongjian Wang,Meidi Wang,Fusheng Pan,Zhongyi Jiang
Graphene oxide (GO) laminar membranes with fast water-transport nanochannels hold great promise for water-selective molecular separations, but the water-capture ability of membrane surfaces limits the separation performance. Herein, we engineered water-capture coatings on GO laminar membranes using structurally tunable tannic acid (TA) nanoaggregates as building blocks via a bottom-up method, acquiring heterostructured GO membranes for alcohol dehydration. The abundant oxygenated functional groups of TA coatings captured water from alcohol aqueous solutions and enhanced the surface water-capture capacity by up to 309%. We manipulated the surface water-capture ability by regulating the aggregation structure and the subsequent assembly process of the TA nanoaggregates. By virtue of the synergistic effect of the enhanced surface water-capture ability and fast water-transport GO nanochannels, the optimized heterostructured GO membrane exhibited high permeation flux of 9988 g m−2 h−1 and a superior separation factor of 4424 for n-butanol dehydration. This study provides a novel avenue to high-performance GO membranes with rationally designed heterostructures.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
·
2024
·
IF 6.4
Qianwen Liu,Caiyan Qin,Qunzhi Zhu,Wenjing Wu,Xiaomeng Wang
Solar-driven sorption-based atmospheric water harvesting (SSAWH) technology stands as a promising avenue for sourcing freshwater in arid and remote regions. For real-world large-scale applications, the effective water absorption capacity , broad humidity absorption range, and rapid desorption properties of adsorbent materials have been the main goals of the research area. In this context, we have developed a binary salt composite adsorbent material (PAMg-Li) for solar-driven water harvesting by integrating binary hygroscopic salts MgSO 4 particles and LiCl particles, activated carbon fiber (ACF), and polyvinyl alcohol (PVA). The inherent porous structure and interconnected channels at micro and nano scales of PAMg-Li facilitate water absorption, and obtained satisfactory water absorption rate even at 30% relative humidity (RH). It has been shown to be able to achieve a high water storage capacity and realize water desorption under natural light. A home-made device based on PAMg-Li obtained a water evaporation rate of 0.084 kg/(m 2 ·h) under solar radiation intensities ranging from 200 to 850 W/m 2 . The PAMg-Li material developed in this work can be a candidate for a more practical and effective choice for SSAWH.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Pu Zhou,Han Dong,Wanglin Zhang,Jiachen Liu,Yefei Tian,Yi Li,Jiabei Luo,Song Xiao,Kerui Li,Hongye Yuan
Developing metal–organic framework (MOF)-based sorbents with high water-uptake capacity and mild regeneration conditions remains challenging, but is highly sought after for addressing water shortages. Herein, we report a strategy for fabricating thermal-responsive Poly (N-isopropylacrylamide) (PNIPAM)/UiO-66 composite aerogels with variable PNIPAM loading by leveraging the ordered nanopores of UiO-66 colloids, enabling the confined polymerization of NIPAM monomers within the pores, which allows for controllable water capture and release at above 32 ℃. The thermal-responsive PNIPAM/UiO-66 composite aerogels, with varying PNIPAM loadings, demonstrated an outstanding maxima water capture of over 2100 wt% at room temperature and reversible release at above 32 ℃. This performance sets a new benchmark for the leading water-capture adsorbents reported in the literature, thanks to the extensive specific surface area of the aerogels and the unique hydrophilicity-hydrophobicity transition exhibited by the PNIPAM component. More intriguingly, the aforementioned phase transition can be directly visualized by incorporating 4-(1,2,2-triphenylvinyl) benzoic acid (TPE-COOH) molecules with the well-known aggregation-induced emission (AIE) effect into the aerogels. The remarkable water-uptake ability and mild release conditions showcased in this study open new possibilities for practical water harvesting.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW CARBON MATERIALS
·
2022
·
IF 3.7
Song-Yuan Tang,Yong-Sheng Wang,Ya-Fei Yuan,Ya-Qi Ba,Li-Qiu Wang,Guang-Ping Hao,An-Hui Lu
Atmospheric water harvesting (AWH) is considered a promising technique to address the problem of global water shortage. Adsorption-based AWH technology, has the advantages of a simple device structure, high energy efficiency, wide application range, etc., and has attracted much attention. For the adsorption, one of the key issues is to find high-performance porous adsorbents. Porous carbons have exceptional stability, high porosity and low cost, but are usually highly hydrophobic with a low affinity for polar water molecules. A class of monolithic porous carbons with good hydrophilicity was prepared by the pyrolysis of composites consisting of a metal-organic framework in a resorcinol-formaldehyde resin matrix, in which the metal-organic parts developed polar sites in the final products. AWH tests showed that in a relative humidity of 40%-80%, the water capture capacity of the adsorbents reached 20 wt.%.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Ziting Zhu,Hongjian Wang,Chenliang Cao,Jiyu Zou,Meidi Wang,Zhiming Zhang,Yuhan Wang,Yu Cao,Fusheng Pan,Yu Chen,Zhongyi Jiang
Hydrogen peroxide (H 2 O 2 ) enrichment is a significant separation process that catches tremendous attention in energy and environment fields. Membrane technology is envisioned as a promising candidate for H 2 O 2 enrichment owing to its cost-effective and environmental-friendly features. However, it is challenging to develop membrane materials tolerant to rigorous operations of H 2 O 2 enrichment. Here, we explored covalent organic frameworks (COFs) as membrane materials for H 2 O 2 enrichment. The all-organic and periodical assembled nature endowed COFs with excellent chemical robustness, which exhibited excellent performance for H 2 O 2 enrichment. A novel mixed linker modulated assembly method was developed to modulate the interfacial polymerization for COF membrane. Hydrazine hydrate (Hz) and p -phenylenediamine (Pa) were chosen as mixed diamine linkers to synthesize the COF layer composed of TpPa and TpHz clusters. By varying the relative proportion of the mixed linkers, the pore size of COF membranes was tuned from 1.70 nm to 0.50 nm, which exhibited more pronounced size-selective ability for the separation of water and H 2 O 2 . Moreover, the water capture ability of membranes was also fortified by introducing hydrophilic linkers during interfacial polymerization process. As a result, the COF membranes showed a total flux of 38.35 kg m −2 h −1 , H 2 O/H 2 O 2 separation factor of 23 and superior long-term operation performance up to 7 days, manifesting the great potential in H 2 O 2 enrichment. Our study may open a novel route for engineering membranes toward molecular separations involving strong oxidative components.
研究领域:
材料科学
·
化学工程
·
环境科学
·
分离技术
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 33
·2301391
·
IF 13.3
Wenjing Zhang,Jian Zheng,Ruoyu Wang,Li Huang,Junkai Wang,Tianran Zhang,Xiangfeng Liu
Lithium–oxygen (Li–O 2 ) batteries have received extensive attention owing to ultrahigh theoretical energy density. Compared to typical discharge product Li 2 O 2 , LiOH has attracted much attention for its better chemical and electrochemical stability. Large-scale applications of Li–O 2 batteries with LiOH chemistry are hampered by the serious internal shuttling of the water additives with the desired 4e − electrochemical reactions. Here, a metal organic framework-derived “water-trapping” single-atom-Co-N 4 /graphene catalyst (Co-SA-rGO) is provided that successfully mitigates the water shuttling and enables the direct 4e − catalytic reaction of LiOH in the aprotic Li–O 2 battery. The Co-N 4 center is more active toward proton-coupled electron transfer, benefiting - direction 4e − formation of LiOH. 3D interlinked networks also provide large surface area and mesoporous structures to trap ≈12 wt% H 2 O molecules and offer rapid tunnels for O 2 diffusion and Li + transportation. With these unique features, the Co-SA-rGO based Li–O 2 battery delivers a high discharge platform of 2.83 V and a large discharge capacity of 12 760.8 mAh g −1 . Also, the battery can withstand corrosion in the air and maintain a stable discharge platform for 220 cycles. This work points out the direction of enhanced electron/proton transfer for the single-atom catalyst design in Li–O 2 batteries.
研究领域:
材料科学
·
电化学
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能源存储
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）