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http://dx.doi.org/10.7464/ksct.2013.19.3.300

Effect of Reduced Graphite Oxide as Substrate for Zinc Oxide to Hydrogen Sulfide Adsorption  

Jeon, Nu Ri (Graduate School of Green Energy Technology, Chungnam National University)
Song, Hoon Sub (Department of Chemical Engineering, University of Waterloo)
Park, Moon Gyu (Department of Chemical Engineering Education, Chungnam National University)
Kwon, Soon Jin (Graduate School of Green Energy Technology, Chungnam National University)
Ryu, Ho Jeong (Korea Institute of Energy Research)
Yi, Kwang Bok (Department of Chemical Engineering Education, Chungnam National University)
Publication Information
Clean Technology / v.19, no.3, 2013 , pp. 300-305 More about this Journal
Abstract
Zinc oxide (ZnO) and reduced graphite oxide (rGO) composites were synthesized and tested as adsorbents for the hydrogen sulfide ($H_2S$) adsorption at mid-to-high (300 to $500^{\circ}C$) temperatures. In order to investigate the critical roles of oxygen containing functional groups, such as hydroxyl, epoxy and carboxyl groups, attached on rGO surface for the $H_2S$ adsorption, various characterization methods (TGA, XRD, FT-IR, SEM and XPS) were conducted. For the reduction process for graphite oxide (GO) to rGO, a microwave irradiation method was used, and it provided a mild reduction environment which can remain substantial amount of oxygen functional groups on rGO surface. Those functional groups were anchoring and holding nano-sized ZnO onto the 2D rGO surface; and it prevented the aggregation effect on the ZnO particles even at high temperature ranges. Therefore, the $H_2S$ adsorption capacity had been increased about 3.5 times than the pure ZnO.
Keywords
ZnO/rGO composite; $H_2S$ adsorption; Reduced graphite oxide; Zinc oxide;
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