期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 181, 期 -, 页码 779-787出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2015.08.047
关键词
CeO2 nanosheets; Surface defect; Formaldehyde; Thermal catalytic oxidation; Photocatalytic oxidation
资金
- Natural Science Foundation of China [21425627, 21476271]
- Science and Technology Plan Project [2013B090600036]
- Natural Science Foundation of Guangdong Province, China [2014A030308012, 2014KTSCX004]
Eu-doped CeO2 nanosheets were obtained on Ti substrate by facile anodic electrodeposition and annealing in N-2 atmosphere. The composition of the Eu cations doped into the CeO2 nanosheets can be easily tuned by adjusting the ratio of Eu to Ce, which promoted the formation of surface defects. Compared to pristine CeO2 nanosheets, the as-prepared 4% Eu/CeO2 nanosheets exhibited a much lower complete temperature (120 degrees C) of thermal oxidation for HCHO and a much longer stability as long as 100 h. Significantly, the Eu-doped CeO2 nanosheets also show a much improved photocatalytic performance for removing HCHO under the visible light irradiation. The excellent performance of 4% Eu/CeO2 nanosheets could be attributed to the abundance of surface defects, high specific surface area and large pore volume, high redox ability, narrowed band gap and enhanced optical absorption, and excellent response in the visible region of solar spectrum. Therefore, this work provides a facile and cost-effective strategy for the design and fabrication of multifunctional catalyst toward HCHO removal. (C) 2015 Elsevier B.V. All rights reserved.
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