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Ni-Ce-OMS-2 material: preparation and preliminary catalytic-study on removing ethanol in the gas phase

Paper Topic: 
Emerging pollutants

Pages :
68 - 72

Corresponing Author: 
Tuyet-Mai Tran-Thuy
Gia-Han Nguyen, Quoc-Long Dang-Hung, Trong-Phu Tran, Dung V. Nguyen, Long Q. Nguyen and Tuyet-Mai Tran-Thuy
Paper ID: 
Paper Status: 
Date Paper Accepted: 
Paper online: 
Visual abstract: 

Cryptomelane type manganese oxide K-OMS-2 and Ni-Ce-OMS-2 co-doping materials were synthesized by one-step preparation with refluxing system. The crystalline structure, and morphology were characterized by X-ray diffraction analysis and SEM images. Ni (II) and Ce (III) were incorporated into cryptomelane, substituted for Mn (III) and Mn (IV) resulting an increase of Mn-average-oxidation-state from 3.6 to 3.8 for un-doped and co-doped samples, respectively. With different amount of precursor-cerium concentration, NiCe1.0 improved the ethanol conversion by a factor of 8 compared to unmodified K-OMS-2. Additionally, NiCe1.0 showed a significant increase of ethanol conversion with reaction temperature. Over above 90% of ethanol was total oxidized at 150 C suggesting a potential Ni-Ce-OMS-2 catalyst for removing volatile organic compounds at low temperature.

Ni-Ce-OMS-2; Ni-Ce-cryptomelane; removing ethanol vapor; manganese AOS; deep oxidation of ethanol