Rational designed ZIF-8@PDA@PDMS composite sponge for efficient and sustainable particulate matter filtering under harsh environment (Open Access)--颗粒学报PARTICUOLOGY

Gou, Y., Hao, Y., Cai, W., Huang, J., & Lai, Y. (2023). Rational designed ZIF-8@PDA@PDMS composite sponge for efficient and sustainable particulate matter filtering under harsh environment. Particuology, 76, 141-150. https://doi.org/10.1016/j.partic.2022.09.001

Rational designed ZIF-8@PDA@PDMS composite sponge for efficient and sustainable particulate matter filtering under harsh environment (Open Access)

Yukui Gou ^a, Yuanye Hao ^a, Weilong Cai ^{a b *}, Jianying Huang ^{a b *}, Yuekun Lai ^{a b *}

a College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
b Qingyuan Innovation Laboratory, Quanzhou, 362801, China

10.1016/j.partic.2022.09.001

Volume 76, May 2023, Pages 141-150

Received 30 June 2022, Revised 30 July 2022, Accepted 1 September 2022, Available online 3 October 2022, Version of Record 1 November 2022.

E-mail: wl.cai@fzu.edu.cn; jyhuang@fzu.edu.cn; yklai@fzu.edu.cn

Highlights

• ZIF-8@PDA@PDMS composite sponge is prepared by sacrificial template method and in situ growth method.

• Filter displays excellent PM filtration performance under both high temperature and high humidity conditions.

• Easily adjustable pore structure and customizable shapes are realized for promising filter applications.

Abstract

Particulate matter (PM) is a significant danger to both environment and human health. Despite the development of a series of air filters, they do not work well in harsh environment such as high temperature, high humidity or long-time filtration. To make a three-dimensional (3D) particle capture device, a sacrificial template approach was used to manufacture polydimethylsiloxane (PDMS) sponge, and then zeolite imidazole framework-8 (ZIF-8) was grown in situ on the 3D network of PDMS sponge. The removal efficiency of PM_2.5 or PM₁₀ is greater than 99.8% because of the high specific surface area and porous network structure of PDMS sponge, as well as the large number of metal sites of ZIF-8. In addition, the sponge filter has long-term filtration stability and still achieves excellent performance after 65 h of filtration. The composite sponge can adapt to harsh environments such as high temperature (250 °C) and high humidity (90% RH). Composite sponge filter has a regular shape, and it may be customized to any shape as required. This study provides a new idea for designing 3D high-efficiency air filters that can adapt to harsh environments.

Graphical abstract

Keywords

PDMS sponge; ZIF-8; Particle capture; High temperature; Stability

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