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 › peer-review

22 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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@article{98882cd342154e869d1ec7fbb5295e41,

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

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}",

note = "Funding Information: This work was partly supported by Grant-in-Aid for Basic Research from the National Foundation for Science and Technology Development (NAFOSTED) and Vietnam National University. Publisher Copyright: {\textcopyright} 2017 Elsevier Inc. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.",

year = "2017",

month = oct,

day = "15",

doi = "10.1016/j.jcis.2017.05.045",

language = "English",

volume = "504",

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journal = "Journal of Colloid and Interface Science",

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T1 - Rutile TiO2 nanocrystals with exposed {3 3 1} facets for enhanced photocatalytic CO2 reduction activity

AU - Truong, Quang Duc

AU - Hoa, Huu Thu

AU - Le, Thanh Son

N1 - Funding Information: This work was partly supported by Grant-in-Aid for Basic Research from the National Foundation for Science and Technology Development (NAFOSTED) and Vietnam National University. Publisher Copyright: © 2017 Elsevier Inc. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2017/10/15

Y1 - 2017/10/15

N2 - 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.

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.

KW - CO reduction

KW - High-index facets

KW - Rutile

KW - TiO

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