Graphene oxide(GO) modified biochar adsorben was prepared by impregnation method.The adsorption performance of different content of the sorbent on CO2 was studied in 101.325kPa,30℃.The sorbent was characterized by BET,SEM XRD,FT-IR and XPS.The results shown that the raw biochar obtained by pyrolysis at 900℃ shown the highest capture capacity of CO2 in unmodified biochar sorbents(57.4mg/g).As the load capacity of GO was 9wt%,the composite sorbent shown the optimal capture capacity of CO2 (77.5mg/g)which was increased by 35% compared with that of unmodified biochar.The adsorption capacity of the sorbent for CO2 was affected by surface oxygen functional groups,aromatization degree of biochar and the approaching angle between CO2 and adsorbent surface.
Wang Lichun, Ma Liping, Peng Yuhui, Ao Ran, Guo Zhiying
. Research on GO modified bagasse biochar for CO2 adsorption[J]. New Chemical Materials, 2020
, 48(7)
: 108
-113
.
DOI: 10.19817/j.cnki.issn 1006-3536.2020.07.026
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