Open AccessSynthesis and application of reducing graphene oxide based nanocomposite materials to improve the solar thermal absorption efficiency for distilling saline water into fresh water
Author(s) -
Thuy Bui Thi Le
Publication year - 2020
Publication title -
xúc tác và hấp phụ
Language(s) - English
Resource type - Journals
ISSN - 0866-7411
DOI - 10.51316/jca.2020.007
Subject(s) - nanocomposite , materials science , graphene , sorption , oxide , chemical engineering , absorption of water , absorption (acoustics) , composite material , chemistry , nanotechnology , adsorption , organic chemistry , metallurgy , engineering
This work presents the preparation and characterization of some nanocomposite materials based on reduced graphene oxide (rGO) (Al2O3/rGO, Fe3O4/rGO, Fe3O4–Al2O3/rGO). Thermal sorption ability of prepared nanocomposite materials in salty water were measured. Results showed that all investigated materials that were dispersed in salty water raised the thermal absorption ability of solutions. Fe3O4-Al2O3/rGO gived the highest thermal absorption efficiency (the temperature difference between the blank sample and the sample containing Fe3O4-Al2O3/rGO with content of 0.5 mg/mL is 8°C). The thermal sorption increased with increasing the concentration of materials in solution and the suitable concentration of 5 mg/mL was found. The addition of Fe3O4 increased the thermal sorption and created magnetic property of material. Fe3O4-Al2O3/rGO was recovered by magnet with high yield up to 98%; Olny a minor decrease in thermal sorption ability of recovered material was abserved. The distillation rate of salty water dispersed Fe3O4-Al2O3/rGO using solar energy was four times higher than without dispersing it. The results showed that these nanocomposite materials can be used to increase the efficiency of thermal absorption in the process of distilling salty water into fresh water.