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 tem-perature,high humidity ...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 tem-perature,high humidity or long-time filtration.To make a three-dimensional(3D)particle capture de-vice,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℃)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.展开更多
基金supported by the National Natural Science Foundation of China(grant Nos.22075046,51972063)Natural Science Funds for Distinguished Young Scholar of Fujian Province(grant No.2020j06038)+1 种基金Natural Science Foundation of Fujian Province(grant No.2019j01256)111 Project(grant No.D17005).
文摘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 tem-perature,high humidity or long-time filtration.To make a three-dimensional(3D)particle capture de-vice,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℃)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.
