Abstract
The influence of physical and chemical surface properties on the adsorption of nitrobenzene, a major organic contaminant in wastewater, was investigated using a wide range of graphene-based materials. These included carbon blacks and activated carbons as well as nanostructured materials such as graphitic nanoribbons (GNRs) and graphene-like structures derived from rice husk (RHC). The surface of GNRs was also modified by oxidation with hydrogen peroxide under UV irradiation (yielding Ox-GNRs). For the understanding of the importance of electrostatic and dispersive interactions, the uptake of nitrobenzene was measured in solutions at controlled pH conditions. The Langmuir and Freundlich parameters were found to be dependent on both surface physics and chemistry. To elucidate this influence, the adsorption of H2O/D2O was performed on selected samples. The edge surfaces of nanoporous carbons appear to exert dominant interactions with polar molecules such as nitrobenzene. At the same time, while the presence of micropores is the most important factor for adsorption at low concentration, the meso- and macropores become more important at higher nitrobenzene concentrations. The novelty of this study resides in the use of complementary techniques to understand the adsorption on traditional carbon materials as a guide for the optimization of novel, graphene-like nanostructured adsorbents.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 833-844 |
| Number of pages | 12 |
| Journal | Carbon |
| Volume | 139 |
| DOIs | |
| State | Published - Nov 2018 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Materials Science(all)
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Nanostructured carbon materials for enhanced nitrobenzene adsorption : Physical vs. chemical surface properties. / Dasgupta, Archi; Matos, Juan; Muramatsu, Hiroyuki; Ono, Yuji; Gonzalez, Viviana; Liu, He; Rotella, Christopher; Fujisawa, Kazunori; Cruz-Silva, Rodolfo; Hashimoto, Yoshio; Endo, Morinobu; Kaneko, Katsumi; Radovic, Ljubisa R.; Terrones, Mauricio.
In: Carbon, Vol. 139, 11.2018, p. 833-844.Research output: Contribution to journal › Article
TY - JOUR
T1 - Nanostructured carbon materials for enhanced nitrobenzene adsorption
T2 - Physical vs. chemical surface properties
AU - Dasgupta, Archi
AU - Matos, Juan
AU - Muramatsu, Hiroyuki
AU - Ono, Yuji
AU - Gonzalez, Viviana
AU - Liu, He
AU - Rotella, Christopher
AU - Fujisawa, Kazunori
AU - Cruz-Silva, Rodolfo
AU - Hashimoto, Yoshio
AU - Endo, Morinobu
AU - Kaneko, Katsumi
AU - Radovic, Ljubisa R.
AU - Terrones, Mauricio
PY - 2018/11
Y1 - 2018/11
N2 - The influence of physical and chemical surface properties on the adsorption of nitrobenzene, a major organic contaminant in wastewater, was investigated using a wide range of graphene-based materials. These included carbon blacks and activated carbons as well as nanostructured materials such as graphitic nanoribbons (GNRs) and graphene-like structures derived from rice husk (RHC). The surface of GNRs was also modified by oxidation with hydrogen peroxide under UV irradiation (yielding Ox-GNRs). For the understanding of the importance of electrostatic and dispersive interactions, the uptake of nitrobenzene was measured in solutions at controlled pH conditions. The Langmuir and Freundlich parameters were found to be dependent on both surface physics and chemistry. To elucidate this influence, the adsorption of H2O/D2O was performed on selected samples. The edge surfaces of nanoporous carbons appear to exert dominant interactions with polar molecules such as nitrobenzene. At the same time, while the presence of micropores is the most important factor for adsorption at low concentration, the meso- and macropores become more important at higher nitrobenzene concentrations. The novelty of this study resides in the use of complementary techniques to understand the adsorption on traditional carbon materials as a guide for the optimization of novel, graphene-like nanostructured adsorbents.
AB - The influence of physical and chemical surface properties on the adsorption of nitrobenzene, a major organic contaminant in wastewater, was investigated using a wide range of graphene-based materials. These included carbon blacks and activated carbons as well as nanostructured materials such as graphitic nanoribbons (GNRs) and graphene-like structures derived from rice husk (RHC). The surface of GNRs was also modified by oxidation with hydrogen peroxide under UV irradiation (yielding Ox-GNRs). For the understanding of the importance of electrostatic and dispersive interactions, the uptake of nitrobenzene was measured in solutions at controlled pH conditions. The Langmuir and Freundlich parameters were found to be dependent on both surface physics and chemistry. To elucidate this influence, the adsorption of H2O/D2O was performed on selected samples. The edge surfaces of nanoporous carbons appear to exert dominant interactions with polar molecules such as nitrobenzene. At the same time, while the presence of micropores is the most important factor for adsorption at low concentration, the meso- and macropores become more important at higher nitrobenzene concentrations. The novelty of this study resides in the use of complementary techniques to understand the adsorption on traditional carbon materials as a guide for the optimization of novel, graphene-like nanostructured adsorbents.
UR - http://www.scopus.com/inward/record.url?scp=85053155608&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85053155608&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2018.07.045
DO - 10.1016/j.carbon.2018.07.045
M3 - Article
AN - SCOPUS:85053155608
VL - 139
SP - 833
EP - 844
JO - Carbon
JF - Carbon
SN - 0008-6223
ER -