Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (8): 20260004.doi: 10.7503/cjcu20260004

• Physical Chemistry • Previous Articles     Next Articles

Pseudo Lotus Leaf Layered Design to Enhance the Surface Hydrophobicity and CO2 Adsorption Capability of 13X Molecular Sieve

LI Shiqing1, WANG Zhuo2, ZHANG Bin1, ZENG Bingfang3, RUAN Xianghui1(), LYU Menglan1()   

  1. 1.Engineering Research Center for Energy Conversion and Storage Technology of Guizhou,School of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,China
    2.School of Resources and Environmental Engineering,Guizhou Institute of Technology,Guiyang 550003,China
    3.College of Chemical Engineering,Guizhou University of Engineering Science,Bijie 551700,China
  • Received:2026-01-01 Online:2026-08-10 Published:2026-05-14
  • Contact: RUAN Xianghui, LYU Menglan E-mail:xhruan@gzu.edu.cn;mllv@gzu.edu.cn
  • Supported by:
    the Open Fund of Guizhou Provincial Laboratory of Intelligent Development and Efficient Utilization of Energy, China(GEL-KY-2025-012);the National Natural Science Foundation of China(52373175);the High-level Innovative Talents Foundation of Guizhou Province, China(No.QKHPTRC-GCC[2023]-024), the Natural Science Foundation of Guizhou Province, China(No.QKHPTRC-CXTD[2023]005), the Guizhou University Introduces Talent Scientific Research Project, China([2023]33);the Basic Research Program of Guizhou University, China([2023]18)

Abstract:

A polystyrene-poly(methyl methacrylate)(PS-PMMA) hydrophobic layer was constructed on the surface of 13X molecular sieve and PS-PMMA/13X molecular sieve was prepared via a biomimetic lotus-leaf-like structural design. By integrating an organic nanoscale surface architecture, the fabrication of PS-PMMA/13X molecular sieve was achieved under mild conditions without disrupting the crystalline framework of the 13X molecular sieve, while maintaining thermal stability up to 370 ℃. The water contact angle increased to 127.6°, indicating significantly enhanced hydrophobicity. The modified 13X molecular sieve exhibited excellent water resistance while preserving its intrinsic adsorption properties. Static adsorption results revealed that CO2 adsorption on PS-PMMA0.05/13X follows the Langmuir model and is dominated by physisorption. After 6 h of water immersion followed by drying, the material retained over 92% of its adsorption capacity after ten cycles. Furthermore, under simulated humid flue gas conditions[15% relative humity(RH) and 15%(volume fraction) CO2], the CO2 adsorption capacity reached 0.045 g/g, representing a 73% increase compared to pristine 13X molecular sieve, effectively suppressing competitive adsorption from water vapor. The PS-PMMA0.05/13X molecular sieve demonstrates excellent CO2 adsorption performance under high temperature, low concentration, and humid conditions. With a simple preparation method and robust performance, it shows strong potential for practical carbon capture applications.

Key words: 13X molecular sieve, Surface modification, Carbon dioxide capture

CLC Number: 

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