Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 22, Pages 26134-26142Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c06964
Keywords
TS-1; hierarchical structure; nanosized crystal; propene epoxidation; concentrated system
Funding
- Natural Science Foundation of China [21978325, 21776312]
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In this work, a facile and mesoporogen-free strategy was reported to manipulate the pore structure and particle size of TS-1 using a concentrated system. The novel TS-1 showed higher Ti concentration on surface, higher surface area, abundant mesopores, and reduced crystal size, leading to a good PO formation rate with enhanced catalytic stability as a bifunctional Au-Ti catalyst.
Hierarchical TS-1 has attracted enormous attention from both academia and industry due to its remarkable catalytic performance in epoxidation reactions. However, sustainable synthesis of hierarchical-nanosized TS-1 without mesoporogens is still challenging. In this work, we report a facile and mesoporogen-free strategy to simultaneously manipulate pore structure and particle size of TS-1 employing the concentrated system. Taking advantage of the suspended nuclei in the concentrated system as confirmed by the DLS-PSD and atomic force microscopy, the novel TS-1 is demonstrated to have higher Ti concentration on surface, higher surface area (539 m(2)/g), abundant mesopores, and reduced crystal size (ca. 150 nm). Moreover, this Au-Ti bifunctional catalyst shows a good PO formation rate with enhanced catalytic stability due to the hierarchical structure. This strategy opens a novel way for the green synthesis of hierarchical-nanosized TS-1 and facilitates industrial development of the Au/TS-1 catalyst for propene epoxidation.
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