SCG-Based CNF Aerogels with Oriented and Aligned Porous Structure for Solar Interfacial Desalination
Xinjie Luo, Zhou Li, Ruizhi Zheng, Hongfei Zhang, Baoling Wang, Yi Mei, Renjie Chen
Abstract
Spent coffee grounds are recognized as a green and sustainable resource of cellulose nanofiber (CNF), which can further form aerogels with rGO for solar-driven interfacial desalination via directional freezing technology. The vertically arranged channels provide better photothermal conversion performance and salt tolerance of rGO/CNF aerogels. Their max evaporation rate can reach to 2.729 kg·m –2 ·h –1 under natural sunlight. In terms of long-term application (10 days), the aerogels exhibit a stable evaporation property in outdoor environments. The optimum daily average water yield is 15.00 L·m –2, which can fulfill the daily water requirement of six people.
Topics & Concepts
Materials scienceDesalinationEvaporationSolar desalinationChemical engineeringPorosityCelluloseNanofiberAerogelComposite materialNanotechnologyMeteorologyBiologyGeneticsEngineeringPhysicsMembraneSolar-Powered Water Purification MethodsSurface Modification and SuperhydrophobicityAerogels and thermal insulation