Self-Regulated Porosity and Reactivity in Mesoporous Heterogeneous Catalysts Using Colloidal Nanocrystals

Self-Regulated Porosity and Reactivity in Mesoporous Heterogeneous Catalysts Using Colloidal Nanocrystals
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使用胶体纳米晶体的介孔多相催化剂的自调节孔隙率和反应性

DOI:
10.1021/acs.jpcc.9b03723
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发表时间:
2019
期刊:
The Journal of Physical Chemistry C
影响因子:
--
通讯作者:
Peiris, Frank C.
Peiris, Frank C.
中科院分区:
--
文献类型:
--
作者:
Tian, Xinchun;Goh, Tian Wei;VandenBerg, Oliver;VanDerslice, Jeremy;da Silva, Tiago Fiorini;Naab, Fabian;Hay, Jennifer L.;Chang, Julia J.;Yuan, Bin;Peiris, Frank C.

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This paper describes the creation of mesoporous inorganic films based on the plasma processing of ligand-capped nanocrystals. We use nanorods of HfO2as a model system and report an extensive characterization of the chemistry, structure, mechanical properties, and reactivity to show that (i) the aspect ratio of the nanorods regulates the pore size and pore volume of the films in a predictable manner and yields an increase in porosity over spherical nanocrystals of up to 60%, (ii) the modulus (>25 GPa) and hardness (>1.1 GPa) are sufficient to tolerate chemical–mechanical planarization, and (iii) the catalytic activity can be finely controlled by the choice of ligands, which regulate the surface chemistry and water adsorption in the final product. This approach is an attractive route to create—in two simple and scalable steps—crack-free inorganic mesoporous films for applications in catalysis, energy storage, energy harvesting, and more.
关于等离子体从胶体纳米晶体薄膜中去除配体的动力学。
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