Transforming Porous Silica Nanoparticles into Porous Liquids with Different Canopy Structures for CO2 Capture

Lisha Sheng; Zhenqian Chen; Xin Wang; Abdul Samad Farooq

doi:10.1021/acsomega.1c05091

Transforming Porous Silica Nanoparticles into Porous Liquids with Different Canopy Structures for CO₂ Capture

ACS Omega. 2022 Feb 8;7(7):5687-5697. doi: 10.1021/acsomega.1c05091. eCollection 2022 Feb 22.

Authors

Lisha Sheng^{1

2}, Zhenqian Chen^{1

2

3}, Xin Wang^{1

2}, Abdul Samad Farooq⁴

Affiliations

¹ School of Energy and Environment, Southeast University, Nanjing 210096, P. R. China.
² Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Nanjing 210096, P. R. China.
³ Jiangsu Province Key Laboratory of Solar Energy Science and Technology, Nanjing 210096, P. R. China.
⁴ Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.

Abstract

Porous liquids (PLs) have both liquid fluidity and solid porosity, thereby offering a variety of applications, such as gas sorption and separation, homogeneous catalysis, energy storage, and so forth. In this research, canopies with varying structures were utilized to modify porous silica nanoparticles to develop Type I PLs. According to experimental results, the molecular weight of canopies should be high enough to maintain the porous materials in the liquid state at room temperature. Characterization results revealed that PL_1_M2070 and PL_1_AC1815 displayed low viscosity and good fluidity. Both low temperature and high pressure positively influenced CO₂ capacity. The cavity occupancy resulted in poorer sorption capacity of PLs with branched canopies in comparison with that with linear canopies. Furthermore, the sorption capacity of PL_1_M2070 was 90.5% of the original CO₂ sorption capacity after 10 sorption/desorption cycles, indicating excellent recyclability.