Natural organic matter inhibits aggregation of few-layered black phosphorus in mono- and divalent electrolyte solutions

doi:10.1039/c8en01178h

	Natural organic matter inhibits aggregation of few-layered black phosphorus in mono- and divalent electrolyte solutions
	Tan, Zhiqiang 5; Yin, Yongguang 5; Guo, Xiaoru 1; Wang, Bowen 3,5; Shang, Heping 4; Xu, Jingwen 3,5; Zhao, Qing 2; Liu, Jingfu 1,5; Xing, Baoshan 4
刊名	ENVIRONMENTAL SCIENCE-NANO
	2019-02-01
卷号	6 期号:2 页码:599-609
ISSN号	2051-8153
DOI	10.1039/c8en01178h
英文摘要	Extensive synthesis and applications of few-layered black phosphorus (BPs) are accompanied by increasing concern over its stability and potential risk. However, the colloidal stability of BPs under environmentally relevant conditions remains unclear. Hence, we investigated the influences of two representative electrolytes (i.e., NaCl and CaCl2) and natural organic matter (NOM) on the aggregation behavior of BPs. Ca2+ ions exhibited a stronger destabilization effect on BPs than Na+ due to their stronger surface charge screening as well as intersheet bridging by the complexes of Ca2+ ions and oxidized phosphorus (POx) species on the BPs surface. Apart from the Ca2+-induced enhanced aggregation in the presence of high concentration of Ca2+, the aggregation behavior of BPs in the two electrolytes at different concentrations and their ratios of critical coagulation concentrations (CCCs) generally followed classical colloidal theory such as the Schulze-Hardy rule. Moreover, in the presence of 10 mg C/L NOM the CCC values of BPs in NaCl and CaCl2 solutions were both three times higher than that obtained without NOM, and the aggregation kinetics of BPs in these electrolytes containing NOM were qualitatively consistent with extended DLVO theory. Specifically, NOM significantly improved the stabilization of BPs in CaCl2 solutions via steric repulsion and isolation of Ca2+ ions from interaction with POx species on the surface of BPs. This stabilization mechanism derived from "NOM corona" structures was elucidated by a wide spectrum of characterization and quantification techniques. These findings provide new insights into evaluating the stability and fate of this nanomaterial in natural aquatic environments.
资助项目	National Key R&D Program of China[2016YFA0203102] ; National Basic Research Program of China[2015CB932003] ; National Natural Science Foundation of China[21777173] ; National Natural Science Foundation of China[21522705] ; Youth Innovation Promotion Association CAS[2017065] ; China Scholarship Council
WOS研究方向	Chemistry ; Environmental Sciences & Ecology ; Science & Technology - Other Topics
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000459903600017
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/123945]
专题	中国科学院沈阳应用生态研究所
通讯作者	Liu, Jingfu; Xing, Baoshan
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Key Lab Pollut Ecol & Environm Engn, Inst Appl Ecol, Shenyang 110016, Liaoning, Peoples R China 3.Liaoning Univ, Sch Environm Sci, Shenyang 110036, Liaoning, Peoples R China 4.Univ Massachusetts, Stockbridge Sch Agr, Amherst, MA 01003 USA 5.Chinese Acad Sci, State Key Lab Environm Chem & Ecotoxicol, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Tan, Zhiqiang,Yin, Yongguang,Guo, Xiaoru,et al. Natural organic matter inhibits aggregation of few-layered black phosphorus in mono- and divalent electrolyte solutions[J]. ENVIRONMENTAL SCIENCE-NANO,2019,6(2):599-609.
APA	Tan, Zhiqiang.,Yin, Yongguang.,Guo, Xiaoru.,Wang, Bowen.,Shang, Heping.,...&Xing, Baoshan.(2019).Natural organic matter inhibits aggregation of few-layered black phosphorus in mono- and divalent electrolyte solutions.ENVIRONMENTAL SCIENCE-NANO,6(2),599-609.
MLA	Tan, Zhiqiang,et al."Natural organic matter inhibits aggregation of few-layered black phosphorus in mono- and divalent electrolyte solutions".ENVIRONMENTAL SCIENCE-NANO 6.2(2019):599-609.