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Preparation and formation mechanism of mesoporous CuO-CeO2 mixed oxides with excellent catalytic performance for removal of VOCs

Preparation and formation mechanism of mesoporous CuO-CeO2 mixed oxides with excellent catalytic performance for removal of VOCs
Preparation and formation mechanism of mesoporous CuO-CeO2 mixed oxides with excellent catalytic performance for removal of VOCs
A simple route has been developed to synthesize mesoporous CuO–CeO2 mixed oxides. X-ray diffraction, N2 adsorption and desorption isotherms, and high-resolution transmission electron microscopy have been used to characterize the obtained mesoporous CuO–CeO2 mixed oxides. The results revealed that the as-prepared CuO–CeO2 mixed oxides possessed a high BET surface area and pores in the range of 1–10 nm after calcination at 600 °C for 4 h. In order to understand the formation mechanism of the mesoporous structure, the precursor before calcination was characterized by FTIR and TG-DSC. The results showed that the formation of the mesoporous structure with the high BET surface area was ascribed to the decomposition of ammonia nitrate. Further experimental investigations revealed that the amount of ammonia nitrate in the precursor greatly influenced the BET surface area and the pore size of the final product. Furthermore, the method could be extended to the synthesis of other mixed oxides with the mesoporous structures, such as ZrO2–CeO2 and ZrO2–Y2O3. The as-prepared mesoporous CuO–CeO2 sample with the high surface area exhibited highly reducible features as compared to the sample with a low surface area. The mesoporous CuO–CeO2 powder showed excellent catalytic activity for the complete oxidation of benzene.
CuO–CeO2, mesoporous structure, catalysis, VOCs oxidation, benzene
427-434
Hu, C.Q.
091e749d-3892-4be7-9b9f-26b223f27a98
Zhu, Q.S.
aa90bc46-f7d5-40d6-9505-21028680800f
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Zhang, Y.Y.
671b8772-1605-4122-ba3e-54861e85bace
Wang, Y.
23c775f0-3cac-44d5-9e16-2098959c493b
Hu, C.Q.
091e749d-3892-4be7-9b9f-26b223f27a98
Zhu, Q.S.
aa90bc46-f7d5-40d6-9505-21028680800f
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Zhang, Y.Y.
671b8772-1605-4122-ba3e-54861e85bace
Wang, Y.
23c775f0-3cac-44d5-9e16-2098959c493b

Hu, C.Q., Zhu, Q.S., Jiang, Zheng, Zhang, Y.Y. and Wang, Y. (2008) Preparation and formation mechanism of mesoporous CuO-CeO2 mixed oxides with excellent catalytic performance for removal of VOCs. Microporous and Mesoporous Materials, 113 (1-3), 427-434. (doi:10.1016/j.micromeso.2007.11.043).

Record type: Article

Abstract

A simple route has been developed to synthesize mesoporous CuO–CeO2 mixed oxides. X-ray diffraction, N2 adsorption and desorption isotherms, and high-resolution transmission electron microscopy have been used to characterize the obtained mesoporous CuO–CeO2 mixed oxides. The results revealed that the as-prepared CuO–CeO2 mixed oxides possessed a high BET surface area and pores in the range of 1–10 nm after calcination at 600 °C for 4 h. In order to understand the formation mechanism of the mesoporous structure, the precursor before calcination was characterized by FTIR and TG-DSC. The results showed that the formation of the mesoporous structure with the high BET surface area was ascribed to the decomposition of ammonia nitrate. Further experimental investigations revealed that the amount of ammonia nitrate in the precursor greatly influenced the BET surface area and the pore size of the final product. Furthermore, the method could be extended to the synthesis of other mixed oxides with the mesoporous structures, such as ZrO2–CeO2 and ZrO2–Y2O3. The as-prepared mesoporous CuO–CeO2 sample with the high surface area exhibited highly reducible features as compared to the sample with a low surface area. The mesoporous CuO–CeO2 powder showed excellent catalytic activity for the complete oxidation of benzene.

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Published date: 2008
Keywords: CuO–CeO2, mesoporous structure, catalysis, VOCs oxidation, benzene
Organisations: Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 352775
URI: http://eprints.soton.ac.uk/id/eprint/352775
PURE UUID: ee696238-40e2-4905-bdf3-296058ce8df0
ORCID for Zheng Jiang: ORCID iD orcid.org/0000-0002-7972-6175

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Date deposited: 20 May 2013 15:57
Last modified: 17 Dec 2019 01:36

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Contributors

Author: C.Q. Hu
Author: Q.S. Zhu
Author: Zheng Jiang ORCID iD
Author: Y.Y. Zhang
Author: Y. Wang

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