Rutile TiO2 nanocrystals with exposed {3 3 1} facets for enhanced photocatalytic CO2 reduction activity

Quang Duc Truong; Huu Thu Hoa; Thanh Son Le

doi:10.1016/j.jcis.2017.05.045

Rutile TiO₂ nanocrystals with exposed {3 3 1} facets for enhanced photocatalytic CO₂ reduction activity

Quang Duc Truong, Huu Thu Hoa, Thanh Son Le

Research output: Contribution to journal › Article

16 Citations (Scopus)

Abstract

Rutile TiO₂ nanocrystals with exposed high-index facets have been investigated in detail by high-resolution transmission electron microscopy (HR-TEM) and selected-area electron diffraction (SAED). It was found that the each branched nanocrystal is bound by 4 facets of high-index {3 3 1}. Additionally, rutile {1 0 1} twinned structures are formed in the boundary of branches during the growth of multi branches in a hierarchical flower-like nanostructures. Notably, the synthesized nanostructures showed significantly higher photocatalytic activities than that of rod particles with exposed {1 1 0} facets in photocatalytic CO₂ reduction. Correlating the presence of high-energy surface on rutile nanocrystals with the photocatalytic activity clearly shows the significant role of surface steps in enhancing intrinsic activity for CO₂ reduction to methanol.

Original language	English
Pages (from-to)	223-229
Number of pages	7
Journal	Journal of Colloid And Interface Science
Volume	504
DOIs	https://doi.org/10.1016/j.jcis.2017.05.045
Publication status	Published - 2017 Oct 15

Keywords

CO reduction
High-index facets
Rutile
TiO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

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Truong, Q. D., Hoa, H. T., & Le, T. S. (2017). Rutile TiO₂ nanocrystals with exposed {3 3 1} facets for enhanced photocatalytic CO₂ reduction activity. Journal of Colloid And Interface Science, 504, 223-229. https://doi.org/10.1016/j.jcis.2017.05.045

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abstract = "Rutile TiO2 nanocrystals with exposed high-index facets have been investigated in detail by high-resolution transmission electron microscopy (HR-TEM) and selected-area electron diffraction (SAED). It was found that the each branched nanocrystal is bound by 4 facets of high-index {3 3 1}. Additionally, rutile {1 0 1} twinned structures are formed in the boundary of branches during the growth of multi branches in a hierarchical flower-like nanostructures. Notably, the synthesized nanostructures showed significantly higher photocatalytic activities than that of rod particles with exposed {1 1 0} facets in photocatalytic CO2 reduction. Correlating the presence of high-energy surface on rutile nanocrystals with the photocatalytic activity clearly shows the significant role of surface steps in enhancing intrinsic activity for CO2 reduction to methanol.",

keywords = "CO reduction, High-index facets, Rutile, TiO",

author = "Truong, {Quang Duc} and Hoa, {Huu Thu} and Le, {Thanh Son}",

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AU - Truong, Quang Duc

AU - Hoa, Huu Thu

AU - Le, Thanh Son

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AB - Rutile TiO2 nanocrystals with exposed high-index facets have been investigated in detail by high-resolution transmission electron microscopy (HR-TEM) and selected-area electron diffraction (SAED). It was found that the each branched nanocrystal is bound by 4 facets of high-index {3 3 1}. Additionally, rutile {1 0 1} twinned structures are formed in the boundary of branches during the growth of multi branches in a hierarchical flower-like nanostructures. Notably, the synthesized nanostructures showed significantly higher photocatalytic activities than that of rod particles with exposed {1 1 0} facets in photocatalytic CO2 reduction. Correlating the presence of high-energy surface on rutile nanocrystals with the photocatalytic activity clearly shows the significant role of surface steps in enhancing intrinsic activity for CO2 reduction to methanol.

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