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Efficient low-temperature catalytic combustion of trichloroethylene over flower-like mesoporous Mn-doped CeO2 microspheres

Paper ID Volume ID Publish Year Pages File Format Full-Text
47113 46459 2011 9 PDF Available
Title
Efficient low-temperature catalytic combustion of trichloroethylene over flower-like mesoporous Mn-doped CeO2 microspheres
Abstract

Flower-like mesoporous Mn-doped CeO2 microspheres with three-dimensional (3D) hierarchical structures were successfully prepared by a hydrothermal method with the aid of glucose and acrylic acid and subsequent particular thermal treatment, and characterized by SEM, XRD, N2 adsorption/desorption, H2-TPR, XPS, Raman spectra and so on. The results show that the atomic ratios of Mn/(Ce + Mn) in the Ce–Mn–O samples as well as their morphologies affect obviously their catalytic performances for low-temperature catalytic combustion of trichloroethylene (TCE). These flower-like Ce–Mn–O microspheres have not only very excellent activity but also high stability, compared with pure flower-like CeO2 microspheres or bulk Ce–Mn–O samples. The flower-like sample with atomic ratio of Mn/(Ce + Mn) of 0.21 exhibits the best activity, for instance, T50 (the temperature for 50% conversion of TCE) is as low as 87 °C, showing much higher catalytic activity than the sample prepared by a co-precipitation or sol–gel method. High surface area, high oxygen mobility and rich surface active oxygen species are responsible for the high catalytic performance of flower-like Mn-doped CeO2 microspheres, compared with general Ce–Mn–O mixed oxides.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights▶ Flower-like mesoporous Mn-doped CeO2 microspheres were prepared by a hydrothermal method. ▶ Flower-like Ce–Mn–O microspheres have an excellent catalytic activity for TCE combustion. ▶ Flower-like Ce–Mn–O microspheres show much higher catalytic activity than general Ce–Mn–O mixed oxides. ▶ T50 (the temperature for 50% conversion of TCE) over flower-like Ce–Me–O microspheres is as low as 87 ̊C. ▶ Flower-like mesoporous Ce–Mn–O microspheres have high stability.

Keywords
Flower-like mesoporous microsphere; Mn-doped CeO2; Hydrothermal synthesis; Trichloroethylene; Catalytic combustion
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Efficient low-temperature catalytic combustion of trichloroethylene over flower-like mesoporous Mn-doped CeO2 microspheres
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 102, Issues 3–4, 22 February 2011, Pages 475–483
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us