Citation: Sang Wook Han, Myung-Geun Jeong, Il Hee Kim, Hyun Ook Seo, Young Dok Kim. Use of NiO/SiO₂ catalysts for toluene total oxidation: Catalytic reaction at lower temperatures and repeated regeneration[J]. Chinese Journal of Catalysis, ;2016, 37(11): 1931-1940. doi: 10.1016/S1872-2067(16)62514-7 shu

Use of NiO/SiO₂ catalysts for toluene total oxidation: Catalytic reaction at lower temperatures and repeated regeneration

a Department of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea;
b Research Center for Nanocatalysts, Korea Research Institute of Chemical Technology (KRICT), Daejeon 305-600, Korea

Received Date: 24 May 2016
Revised Date: 7 July 2016

Fund Project: This work was supported by the National Research Council of Science and Technology (NST) through Degree and Research Center (DRC) Pro-gram (2015).

We deposited NiO via atomic layer deposition on mesoporous SiO₂ particles with diameters of sev-eral hundred micrometers and a mean mesopore size of ~14 nm. NiO was deposited within the shell region of mesoporous SiO₂ particles with a shell thickness of ~11 mm. We annealed the as-prepared NiO/SiO₂ at 450 and 600℃, respectively. These two samples were used as catalysts for the uptake of toluene molecules and their oxidative conversion to CO₂. The sample annealed at 450℃ was generally more reactive in toluene uptake and its subsequent conversion to CO₂. When the NiO/SiO₂ annealed at 450℃ was exposed to toluene vapor at 160℃ and then heated to 450℃, CO₂ was emitted with almost no toluene desorption. We suggest that our catalysts can be used as building blocks for odor removal devices that operate below 200℃. These catalysts can be regularly regenerated at ~450℃.
- Heterogeneous catalysis,
- Chemisorption,
- Thermal desorption,
- Mesoporous material,
- Toluene oxidation
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Use of NiO/SiO₂ catalysts for toluene total oxidation: Catalytic reaction at lower temperatures and repeated regeneration