干旱区生态环境知识资源中心(Arid): Impact of secondary salts, temperature, and pH on the colloidal stability of graphene oxide in water

Arid

DOI	10.1039/d2na00070a
	Impact of secondary salts, temperature, and pH on the colloidal stability of graphene oxide in water
	Mancillas-Salas, Sergio; Reynosa-Martinez, Ana C.; Barroso-Flores, J.; Lopez-Honorato, Eddie
通讯作者	Lopez-Honorato, E
来源期刊	NANOSCALE ADVANCES
ISSN	2516-0230
出版年	2022
卷号	4 期号:11 页码:2435-2443
英文摘要	The stability of graphene oxide (GO) in water is extremely relevant because of its application as an adsorbent material, as well as for its fate and behavior in the environment. Zeta potential was used to study the effect of secondary salts (carbonate, sulfate, and phosphate), temperature (20 to 60 degrees C), and pH (5 to 9) on the stability of six different GOs produced from natural, synthetic, and amorphous graphite-with and without the use of attrition milling. Generally, GOs produced with attrition-milled graphites had lower zeta-potentials than their unmilled counterparts because of their smaller particle sizes and higher concentration of oxygen-containing functional groups. It was observed that GO produced from graphite and synthetic graphite had zeta-potential values lower than -30 mV, even at 30 degrees C. However, it was observed that all the GOs studied were unstable in the presence of carbonate and sulfate salts at concentrations between 170 and 1695 mg L-1, as they reached a zeta-potential of -4.1 mV. Density-functional theory electronic structure calculations suggested that the instability of GO in the presence of carbonate and sulfate was caused by the abstraction of a proton resulting in interaction energies E-int of 28.3 and 168.9 kJ mol(-1), respectively. Our results suggest that temperatures above 30 degrees C, as well as carbonate and sulfate salts at concentrations relevant to arid and semi-arid regions, could promote the formation of agglomerates of GO, thus limiting its use and mobility in water.
类型	Article
语种	英语
开放获取类型	Green Submitted, Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000784916300001
WOS关键词	DRINKING-WATER ; MOLECULAR-DYNAMICS ; FUNCTIONAL-GROUPS ; ARSENIC REMOVAL ; AGGREGATION ; GRAPHITE ; SURFACE ; CARBONATE ; TRANSFORMATION ; ADSORPTION
WOS类目	Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393835
推荐引用方式 GB/T 7714	Mancillas-Salas, Sergio,Reynosa-Martinez, Ana C.,Barroso-Flores, J.,et al. Impact of secondary salts, temperature, and pH on the colloidal stability of graphene oxide in water[J],2022,4(11):2435-2443.
APA	Mancillas-Salas, Sergio,Reynosa-Martinez, Ana C.,Barroso-Flores, J.,&Lopez-Honorato, Eddie.(2022).Impact of secondary salts, temperature, and pH on the colloidal stability of graphene oxide in water.NANOSCALE ADVANCES,4(11),2435-2443.
MLA	Mancillas-Salas, Sergio,et al."Impact of secondary salts, temperature, and pH on the colloidal stability of graphene oxide in water".NANOSCALE ADVANCES 4.11(2022):2435-2443.