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Acid-Modified Sepiolite-Supported Pt (Noble Metal) Catalysts for HCHO Oxidation at Ambient Temperature

Authors :
Yidi Zhou
Xin Min
Lijuan Wang
Yajing Zhao
Bozhi Yang
Xiaoxian Wu
Dan Zhang
Xifeng Hou
Yan’gai Liu
Minghao Fang
Zhaohui Huang
Source :
Catalysts; Volume 12; Issue 11; Pages: 1299
Publication Year :
2022
Publisher :
Multidisciplinary Digital Publishing Institute, 2022.

Abstract

The critical need to enhance the quality of indoor air leads to the improvement of catalyst activity for the removal of formaldehyde. Sepiolite can be utilized in catalytic reactions for its unique structure, composition and high surface area. The adhesion between sepiolite fibers and the blocked microporous channel (by impurities) demands the activation of natural sepiolite through acid treatment. This treatment successfully produces acid-modified sepiolite Pt-supported samples. The impacts of different acid concentrations, Pt loading content and calcination temperature on catalytic activity for formaldehyde (HCHO) oxidation are studied. The catalytic activity of HCHO is characterized and evaluated by techniques including specific surface area, X-ray diffraction, Fourier transform infrared spectrum, X-ray photoelectron spectroscopy and transmission electron microscopy. The results show the maximum specific area of sepiolite at the optimized 0.06 M acid concentration. Among all the prepared samples, the 0.02Pt/Sep catalyst calcined at 500 °C exhibits the highest catalytic activity for the oxidation of HCHO.

Details

Language :
English
ISSN :
20734344
Database :
OpenAIRE
Journal :
Catalysts; Volume 12; Issue 11; Pages: 1299
Accession number :
edsair.doi.dedup.....1f3176e0467b0b1202eba4673bc8a285
Full Text :
https://doi.org/10.3390/catal12111299