Abstract
The influence of functional groups on the degradation of graphene oxide nanomaterials under direct sunlight was investigated by systematically varying the surface chemistry. Using a solvothermal reduction process, graphene nanomaterials with varying oxidation levels, including graphene oxide, partially reduced graphene oxide and fully reduced graphene oxide, were prepared. The physical and chemical properties of the nanomaterials were extensively characterized before and after exposure to simulated sunlight. The degradation of the nanomaterials was determined to be directly related to the functional groups present on the basal plane of the graphene nanomaterials. Specifically, the hydroxyl and epoxy functional groups are the most susceptible to photodegradation. Upon sunlight exposure, the amount of oxygen-containing functional groups on all graphene nanomaterials decreases over time, with fully reduced graphene oxide showing the lowest degradation rate due to the presence of fewer reactive functional groups on the surface. Overall, these results suggest that the oxygen-containing functional groups on the basal plane are the major initiators of the photodegradation of graphene nanomaterials.
| Original language | English |
|---|---|
| Pages (from-to) | 2203-2214 |
| Number of pages | 12 |
| Journal | Environmental Science: Nano |
| Volume | 6 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Jan 1 2019 |
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ASJC Scopus subject areas
- Materials Science (miscellaneous)
- Environmental Science(all)
Cite this
Influence of functional groups on the degradation of graphene oxide nanomaterials. / Shams, Mehnaz; Guiney, Linda M.; Huang, Lijuan; Ramesh, Mani; Yang, Xiaoning; Hersam, Mark C; Chowdhury, Indranil.
In: Environmental Science: Nano, Vol. 6, No. 7, 01.01.2019, p. 2203-2214.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Influence of functional groups on the degradation of graphene oxide nanomaterials
AU - Shams, Mehnaz
AU - Guiney, Linda M.
AU - Huang, Lijuan
AU - Ramesh, Mani
AU - Yang, Xiaoning
AU - Hersam, Mark C
AU - Chowdhury, Indranil
PY - 2019/1/1
Y1 - 2019/1/1
N2 - The influence of functional groups on the degradation of graphene oxide nanomaterials under direct sunlight was investigated by systematically varying the surface chemistry. Using a solvothermal reduction process, graphene nanomaterials with varying oxidation levels, including graphene oxide, partially reduced graphene oxide and fully reduced graphene oxide, were prepared. The physical and chemical properties of the nanomaterials were extensively characterized before and after exposure to simulated sunlight. The degradation of the nanomaterials was determined to be directly related to the functional groups present on the basal plane of the graphene nanomaterials. Specifically, the hydroxyl and epoxy functional groups are the most susceptible to photodegradation. Upon sunlight exposure, the amount of oxygen-containing functional groups on all graphene nanomaterials decreases over time, with fully reduced graphene oxide showing the lowest degradation rate due to the presence of fewer reactive functional groups on the surface. Overall, these results suggest that the oxygen-containing functional groups on the basal plane are the major initiators of the photodegradation of graphene nanomaterials.
AB - The influence of functional groups on the degradation of graphene oxide nanomaterials under direct sunlight was investigated by systematically varying the surface chemistry. Using a solvothermal reduction process, graphene nanomaterials with varying oxidation levels, including graphene oxide, partially reduced graphene oxide and fully reduced graphene oxide, were prepared. The physical and chemical properties of the nanomaterials were extensively characterized before and after exposure to simulated sunlight. The degradation of the nanomaterials was determined to be directly related to the functional groups present on the basal plane of the graphene nanomaterials. Specifically, the hydroxyl and epoxy functional groups are the most susceptible to photodegradation. Upon sunlight exposure, the amount of oxygen-containing functional groups on all graphene nanomaterials decreases over time, with fully reduced graphene oxide showing the lowest degradation rate due to the presence of fewer reactive functional groups on the surface. Overall, these results suggest that the oxygen-containing functional groups on the basal plane are the major initiators of the photodegradation of graphene nanomaterials.
UR - http://www.scopus.com/inward/record.url?scp=85069036863&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85069036863&partnerID=8YFLogxK
U2 - 10.1039/c9en00355j
DO - 10.1039/c9en00355j
M3 - Article
AN - SCOPUS:85069036863
VL - 6
SP - 2203
EP - 2214
JO - Environmental Science: Nano
JF - Environmental Science: Nano
SN - 2051-8153
IS - 7
ER -