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Three-dimensional ruthenium-doped TiO2 sea urchins for enhanced visible-light-responsive H2 production

Journal Article · · Physical Chemistry Chemical Physics. PCCP
DOI:https://doi.org/10.1039/c6cp00472e· OSTI ID:1337641
 [1];  [2];  [2];  [3];  [4];  [1];  [5];  [4];  [1];  [1];  [1];  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., Stony Brook, NY (United States)
  3. Univ. Politecnia de Catalunya, Barcelona (Spain)
  4. Binghamton Univ., Binghamton, NY (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)

Here, 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.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI ID:
1337641
Alternate ID(s):
OSTI ID: 1390839
Report Number(s):
BNL--113278-2016-JA; KC0302010
Journal Information:
Physical Chemistry Chemical Physics. PCCP, Journal Name: Physical Chemistry Chemical Physics. PCCP Journal Issue: 23 Vol. 18; ISSN 1463-9076; ISSN PPCPFQ
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (8)

Ultrafast Synthesis of Urchin-Like Rutile TiO2 by Single-Step Microwave-Assisted Method journal August 2018
Dual II Heterojunctions Metallic Phase MoS 2 /ZnS/ZnO Ternary Composite with Superior Photocatalytic Performance for Removing Contaminants journal June 2019
Dye-Sensitized Solar Cell Based on Novel Star-Shaped Ruthenium Polypyridyl Sensitizer: New Insight into the Relationship between Molecular Designing and Its Outstanding Charge Carrier Dynamics journal June 2018
Controlling the crystallisation of oxide materials by solvothermal chemistry: tuning composition, substitution and morphology of functional solids journal January 2016
Photo-generation of cyclic carbonates using hyper-branched Ru–TiO 2 journal January 2019
Highly effective ruthenium-doped TiO 2 nanoparticles photocatalyst for visible-light-driven photocatalytic hydrogen production journal January 2019
Visible Light-Driven Gas-Phase Artificial Photosynthesis Reactions over Ruthenium Metal Nanoparticles Modified with Anatase TiO 2 journal April 2019
Ru-Ti Oxide Based Catalysts for HCl Oxidation: The Favorable Oxygen Species and Influence of Ce Additive journal January 2019

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