High Water Adsorption MOFs with Optimized Pore‐Nanospaces for Autonomous Indoor Humidity Control and Pollutants Removal

The indoor air quality is of prime importance for human daily life and health, for which the adsorbents like zeolites and silica‐gels are widely used for air dehumidification and harmful gases capture. Herein, we develop a pore‐nanospace post‐engineering strategy to optimize the hydrophilicity, wate...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2022-01, Vol.61 (4), p.e202112097-n/a
Main Authors: Zhu, Neng‐Xiu, Wei, Zhang‐Wen, Chen, Cheng‐Xia, Xiong, Xiao‐Hong, Xiong, Yang‐Yang, Zeng, Zheng, Wang, Wei, Jiang, Ji‐Jun, Fan, Ya‐Nan, Su, Cheng‐Yong
Format: Article
Language:English
Subjects:
Adsorbed water
Adsorption
Air Pollution, Indoor
Air quality
Air quality control
Contaminants
Control stability
Dehumidification
Gels
Health risks
high water-stable MOFs
Humidity
Hydrophilicity
Hydrophobicity
Indoor air pollution
indoor air purification
Indoor air quality
Indoor environments
indoor humidity control
Metal-organic frameworks
Metal-Organic Frameworks - chemistry
MOF pore-nanospace engineering
Moisture control
Molecular Structure
Nanoparticles - chemistry
Optimization
Particle Size
Pollutant removal
Pollutants
Pollution control
Recyclability
Regeneration
Relative humidity
Silica
Silicon dioxide
Surface Properties
Water - chemistry
Water Pollutants, Chemical - chemistry
Water Pollutants, Chemical - isolation & purification
Water purification
water-adsorption based applications
Work capacity
Zeolites
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Summary:The indoor air quality is of prime importance for human daily life and health, for which the adsorbents like zeolites and silica‐gels are widely used for air dehumidification and harmful gases capture. Herein, we develop a pore‐nanospace post‐engineering strategy to optimize the hydrophilicity, water‐uptake capacity and air‐purifying ability of metal‐organic frameworks (MOFs) with long‐term stability, offering an ideal candidate with autonomous multi‐functionality of moisture control and pollutants sequestration. Through variant tuning of organic‐linkers carrying hydrophobic and hydrophilic groups in the pore‐nanospaces of prototypical UiO‐67, a moderately hydrophilic MOF (UiO‐67‐4Me‐NH2‐38 %) with high thermal, hydrolytic and acid‐base stability is screened out, featuring S‐shaped water sorption isotherms exactly located in the recommended comfortable and healthy ranges of relative humidity for indoor ventilation (45 %–65 % RH) and adverse health effects minimization (40–60 % RH). Its exceptional attributes of water‐uptake working capacity/efficiency, contaminants removal, recyclability and regeneration promise a great potential in confined indoor environment application. A moderately hydrophilic MOF of UiO‐67‐4Me‐NH2‐38 % with high thermal, hydrolytic and acid‐base stability has been obtained by a pore‐nanospace post‐engineering strategy, which shows ideal S‐shaped water‐sorption isotherm, high water‐uptake working capacity and efficiency in the ASHRAE recommended humidity range, and prior capture ability of harmful organic and inorganic vapors, providing a promising candidate for autonomous indoor humidity control and air purification.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202112097