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RSC Advances
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DOI: 10.1039/C6RA08021A
ARTICLE
RSC Advances
After the reaction, the solid catalyst can be easily recovered
from the reaction mixture by filtration or centrifugation. As
shown in Figure 6, the catalyst can be successively recycled
for 5 times without obviously decrease of the activity and
selectivity decreasing. According to the XPS results, we
speculate the drop in activity should be mainly ascribed to the
loss of acid sites. Metal leaching is also examined by ICP
analysis after each recycle, and no Au and Ti can be detected,
which is in accordance with the XPS analysis, revealing the
high stability of the catalyst.
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5
4 Conclusions
6
,
,
In summary, we have prepared a novel Au–TiO2–RGO
composite with uniform and tiny Au NPs supported on layered
TiO2–RGO support. After treatment with microwave and
sulfuric acid, surface SO42–/TiO2 solid acid was in-situ formed.
The resulting Au–SO42–/TiO2–RGO was determined as an
enhanced and recyclable catalyst for the hydration. The SMSI
between Au and TiO2, versatile RGO substrate, and in-situ
formed SO42–/TiO2 account for the excellent performance.
The novel catalyst design strategy is readily extended to other
reaction systems with amazing catalytic performance.
6
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10.1039/C5CY01736J
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Acknowledgements
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This study is supported by the National Natural Science Funds
for Excellent Young Scholars (No.21222608), Foundation for
the Author of National Excellent Doctoral Dissertation of
China (No.201251), Program for New Century Excellent
Talents in University (No. NCETꢀ12ꢀ0392) and the Program
of Introducing Talents of Discipline to Universities (No.
B06006).
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Notes and references
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6 |RSC Adv., 2016, 00, 1ꢀ3
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