Abstract
Three-dimensional (3D) monodispersed sea urchin-like Ru-doped rutile TiO2 hierarchical architectures composed of radially aligned, densely-packed TiO2 nanorods have been successfully synthesized via an acid-hydrothermal method at low temperature without the assistance of any structure-directing agent and post annealing treatment. The addition of a minuscule concentration of ruthenium dopants remarkably catalyzes the formation of the 3D urchin structure and drives the enhanced photocatalytic H2 production under visible light irradiation, not possible on undoped and bulk rutile TiO2. Increasing ruthenium doping dosage not only increases the surface area up to 166 m2 g-1 but also induces enhanced photoresponse in the regime of visible and near infrared light. The doping introduces defect impurity levels, i.e. oxygen vacancy and under-coordinated Ti3+, significantly below the conduction band of TiO2, and ruthenium species act as electron donors/acceptors that accelerate the photogenerated hole and electron transfer and efficiently suppress the rapid charge recombination, therefore improving the visible-light-driven activity.
| Original language | English |
|---|---|
| Pages (from-to) | 15972-15979 |
| Number of pages | 8 |
| Journal | Physical Chemistry Chemical Physics |
| Volume | 18 |
| Issue number | 23 |
| DOIs | |
| Publication status | Published - 2016 |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Physics and Astronomy(all)
Cite this
Three-dimensional ruthenium-doped TiO2 sea urchins for enhanced visible-light-responsive H2 production. / Nguyen-Phan, Thuy Duong; Luo, Si; Vovchok, Dimitriy; Llorca, Jordi; Sallis, Shawn; Kattel, Shyam; Xu, Wenqian; Piper, Louis F J; Polyansky, Dmitry; Senanayake, Sanjaya D.; Stacchiola, Dario J.; Rodriguez, José A.
In: Physical Chemistry Chemical Physics, Vol. 18, No. 23, 2016, p. 15972-15979.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Three-dimensional ruthenium-doped TiO2 sea urchins for enhanced visible-light-responsive H2 production
AU - Nguyen-Phan, Thuy Duong
AU - Luo, Si
AU - Vovchok, Dimitriy
AU - Llorca, Jordi
AU - Sallis, Shawn
AU - Kattel, Shyam
AU - Xu, Wenqian
AU - Piper, Louis F J
AU - Polyansky, Dmitry
AU - Senanayake, Sanjaya D.
AU - Stacchiola, Dario J.
AU - Rodriguez, José A.
PY - 2016
Y1 - 2016
N2 - Three-dimensional (3D) monodispersed sea urchin-like Ru-doped rutile TiO2 hierarchical architectures composed of radially aligned, densely-packed TiO2 nanorods have been successfully synthesized via an acid-hydrothermal method at low temperature without the assistance of any structure-directing agent and post annealing treatment. The addition of a minuscule concentration of ruthenium dopants remarkably catalyzes the formation of the 3D urchin structure and drives the enhanced photocatalytic H2 production under visible light irradiation, not possible on undoped and bulk rutile TiO2. Increasing ruthenium doping dosage not only increases the surface area up to 166 m2 g-1 but also induces enhanced photoresponse in the regime of visible and near infrared light. The doping introduces defect impurity levels, i.e. oxygen vacancy and under-coordinated Ti3+, significantly below the conduction band of TiO2, and ruthenium species act as electron donors/acceptors that accelerate the photogenerated hole and electron transfer and efficiently suppress the rapid charge recombination, therefore improving the visible-light-driven activity.
AB - Three-dimensional (3D) monodispersed sea urchin-like Ru-doped rutile TiO2 hierarchical architectures composed of radially aligned, densely-packed TiO2 nanorods have been successfully synthesized via an acid-hydrothermal method at low temperature without the assistance of any structure-directing agent and post annealing treatment. The addition of a minuscule concentration of ruthenium dopants remarkably catalyzes the formation of the 3D urchin structure and drives the enhanced photocatalytic H2 production under visible light irradiation, not possible on undoped and bulk rutile TiO2. Increasing ruthenium doping dosage not only increases the surface area up to 166 m2 g-1 but also induces enhanced photoresponse in the regime of visible and near infrared light. The doping introduces defect impurity levels, i.e. oxygen vacancy and under-coordinated Ti3+, significantly below the conduction band of TiO2, and ruthenium species act as electron donors/acceptors that accelerate the photogenerated hole and electron transfer and efficiently suppress the rapid charge recombination, therefore improving the visible-light-driven activity.
UR - http://www.scopus.com/inward/record.url?scp=84973643406&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84973643406&partnerID=8YFLogxK
U2 - 10.1039/c6cp00472e
DO - 10.1039/c6cp00472e
M3 - Article
AN - SCOPUS:84973643406
VL - 18
SP - 15972
EP - 15979
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
SN - 1463-9076
IS - 23
ER -