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Co-nanocasting synthesis of mesoporous Cu–Mn composite oxides and their promoted catalytic activities for gaseous benzene removal

Paper ID Volume ID Publish Year Pages File Format Full-Text
45627 46418 2015 12 PDF Available
Title
Co-nanocasting synthesis of mesoporous Cu–Mn composite oxides and their promoted catalytic activities for gaseous benzene removal
Abstract

•Co-nanocasting approach was applied to prepare mesoporous Cu–Mn composite oxide with a high surface area.•The sample Cu0.6Mn exhibited the highest activity for catalytic oxidation of benzene and the Ea was low to 45.0 kJ mol−1.•The nanocasted Cu–Mn oxides displayed better activity than that of other catalysts prepared by traditional methods.•Nanocasted catalyst possesses rich adsorbed oxygen species, low temperature reducibility and promoting interaction.

Mesoporous Cu–Mn oxides with high surface area (∼221 m2 g−1) were successfully obtained through a simple co-nanocasting approach using siliceous SBA-15 mesoporous material as a hard template. Their catalytic performances for deep oxidation of benzene were tested and physicochemical properties were characterized in detail by means of N2-physisorption, XRD, XPS, H2-TPR, SEM-EDX and TEM. The as-prepared mesoporous Cu–Mn oxides display superior catalytic activity and the temperature required for achieving a benzene conversion of 90% has been obtained at about 234 °C over sample Cu0.6Mn, which is 131 °C lower than that on the Cu–Mn oxide prepared by co-precipitation method using NaOH. The apparent activation energy over nanocasted catalyst was low to 45.0 kJ mol−1. Nanocasting process provides a limited nanoreactor for the formation of Cu–Mn composite oxide which makes the Cu–Mn oxides owing small particle size, high surface area, rich surface adsorbed oxygen species, low temperature reducibility and promoting interaction of Cu–Mn species. These characters generated by nanocasting method are responsible for its better catalytic activity.

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Keywords
Cu–Mn composite oxide; Nanocasting; Mesoporous structure; Catalytic oxidation; Benzene
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Co-nanocasting synthesis of mesoporous Cu–Mn composite oxides and their promoted catalytic activities for gaseous benzene removal
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 162, January 2015, Pages 110–121
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