Highly concentrated amino-modified biochars using a plasma: Evolution of surface composition and porosity for heavy metal capture

doi:10.1016/j.carbon.2020.07.012

HFCAS OpenIR

	Highly concentrated amino-modified biochars using a plasma: Evolution of surface composition and porosity for heavy metal capture
	Hu, Rui 1,2; Xiao, Jiang 3; Wang, Tianhui 1,4; Gong, Yi 1,2; Chen, Guangcai 3; Chen, Lin 1,2; Tian, Xingyou1,2
	2020-10-30
发表期刊	CARBON
ISSN	0008-6223
通讯作者	Hu, Rui(ruihu@rntek.cas.cn) ; Tian, Xingyou(xytian@issp.ac.cn)
摘要	Highly concentrated amino group-modified biochars derived from twelve biomass residuals are achieved using a two-step radio-frequency Ar/NH3 plasma. The dependence of amino number, N bonding states, surface defects on the pretreatment time of Ar plasma, post-treatment power, duration and gas ratio are well established. For bamboo-biochar, the amino number and N content reach the maximum (8.04 x 10(16)/mg of biochar, 8.84 at.%) at 8.0% NH3 in NH3/Ar, presenting a highly consistent variation tendency with the emission intensity of NH radical. Notably, micropores can be created in matrix by the processing of plasma in moderate conditions, i.e., a given pretreatment time (e.g., 12.5 min), specific gas ratios of post-treatment (>= 50% of NH3) at high RF power (e.g., 240 W) and proper duration (<= 15.0 min). The uptake capacities of Pb(II) (123.1 mg g(-1)), Cu(II) (98.5 mg g(-1)) and Cd(II) (61.2 mg g(-1)) on aminated biochars are 5.42, 5.38 and 7.56 times higher than those on raw biochars. This study shows attractive prospects for the fundamental research in powder modification as well as potentials in environmental management. (C) 2020 Elsevier Ltd. All rights reserved.
关键词	Surface modification Plasma treatment Micropore generation Compositional evolution Enhanced heavy metal uptake
DOI	10.1016/j.carbon.2020.07.012
关键词[WOS]	OXYGEN PLASMA ; ACTIVATED CARBON ; REMOVAL ; COPPER ; ADSORPTION ; REDUCTION ; EFFICIENT ; SORPTION ; WATER ; IONS
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[21875257] ; CAS Pioneer Hundred Talents Program ; CASHIPS Director's Fund, China[YZJJ2018QN20] ; China Postdoctoral Science Foundation[2018M640200] ; China Postdoctoral Science Foundation[2019T120154]
项目资助者	National Natural Science Foundation of China ; CAS Pioneer Hundred Talents Program ; CASHIPS Director's Fund, China ; China Postdoctoral Science Foundation
WOS研究方向	Chemistry ; Materials Science
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary
WOS记录号	WOS:000565904500009
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：40[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/70401
专题	中国科学院合肥物质科学研究院
通讯作者	Hu, Rui; Tian, Xingyou
作者单位	1.Chinese Acad Sci, Inst Solid State Phys, Hefei 230031, Peoples R China 2.Chinese Acad Sci, Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China 3.Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China 4.Univ Sci & Technol China, Hefei 230036, Peoples R China
推荐引用方式 GB/T 7714	Hu, Rui,Xiao, Jiang,Wang, Tianhui,et al. Highly concentrated amino-modified biochars using a plasma: Evolution of surface composition and porosity for heavy metal capture[J]. CARBON,2020,168.
APA	Hu, Rui.,Xiao, Jiang.,Wang, Tianhui.,Gong, Yi.,Chen, Guangcai.,...&Tian, Xingyou.(2020).Highly concentrated amino-modified biochars using a plasma: Evolution of surface composition and porosity for heavy metal capture.CARBON,168.
MLA	Hu, Rui,et al."Highly concentrated amino-modified biochars using a plasma: Evolution of surface composition and porosity for heavy metal capture".CARBON 168(2020).