Inorganic Chemicals Industry >
Study on preparation of bagasse cellulose based carbon aerogels and their adsorption properties
Received date: 2021-11-18
Online published: 2022-09-22
Cellulose was extracted from bagasse by alkali/acid treatment of bagasse，dissolved by sodium hydroxide/urea solution，regenerated，freeze?dried and carbonized at different temperature to prepare bagasse cellulose based carbon aerogel with excellent hydrophobic and oil?absorbing properties.Scanning electron microscopy（SEM），infrared spectroscopy（FT-IR），X-ray diffraction（XRD），BET specific surface area，water contact angle（WCA） and other test methods were used to analyze and characterize the prepared bagasse cellulose based carbon aerogel，and the adsorption and desorption experiments of different oils and organic solvents were carried out.The results showed that the bagasse cellulose carbon aerogel had irregular split?pore network structure and had the characteristics of light weight，high hydrophobic and high specific surface area.High temperature carbonization could not only improve the light compressive properties，specific surface area and pore diameter of carbon aerogel，but also enhance its hydrophobicity and adsorption properties.When the carbonization temperature was 800 ℃，the prepared product CA-2-800 showed good lightness（density:33.4 mg/cm3），high hydrophobicity（water contact angle:136°） and high specific surface area（468.24 m2/g）.CA-2-800 had a good adsorption capacity（20.2~66.3 g/g） for diesel，gasoline，pump oil，n-hexane，toluene and chloroform.Adsorption kinetics showed that CA-2-800 could reach adsorption equilibrium for gasoline and diesel within 30 s，and after 10 cycles of adsorption and desorption for chloroform，CA-2-800 still retained 97% of the adsorption capacity.
Key words： bagasse; carbon aerogels; absorption; low cost; recyclability
Xilin RONG , Bao CUI , Qiumei HUANG , Meijia CUI , Hao CHENG , Jun FENG , Wenyi HUANG . Study on preparation of bagasse cellulose based carbon aerogels and their adsorption properties[J]. Inorganic Chemicals Industry, 2022 , 54(9) : 126 -135 . DOI: 10.19964/j.issn.1006-4990.2021-0698
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