Gold-core lithium-doped titania shell nanostructures for plasmon-enhanced visible light harvesting with photocatalytic activity
- Resource Type
- Authors
- Tong Zhu; Enrico Ciliberto; Stefano Andrea Balsamo; Enrico Greco; D. Mello; Giuseppe Maccarrone; Jing Shang
- Source
- Subject
- Anatase
Materials science
Nanostructure
High-surface area anatase
Sol-gel synthesis
Nanoparticle
Core-shell nanostructure
Bioengineering
02 engineering and technology
Core-shell nanostructures
Lithium
010402 general chemistry
01 natural sciences
chemistry.chemical_compound
Photocatalysi
Rhodamine B
General Materials Science
Photocatalysis
Gold
General Chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Atomic and Molecular Physics, and Optics
0104 chemical sciences
chemistry
Chemical engineering
Colloidal gold
Modeling and Simulation
Titanium dioxide
0210 nano-technology
Visible spectrum
- Language
- English
A simple sol-gel synthesis method has been developed to synthesize uniform nanospheres of gold lithium-doped titanium dioxide in anatase phase (Au/Li-TiO2) with a well-defined core-shell structure with the Li-doped titania as shell and Au nanoparticles as core. The resulting core-shell nanoparticles have a high surface area (~494 m2/g) and uniform pore size (~3.5 nm) for the anatase shell. The synthesis of the gold nanoparticles refers to the classical Turkevich synthesis, and the diameter can be regulated by adjusting the amount of HAuCl4. The gold nanoparticles were first covered with citrate group and subsequently removed by thermal treatment. The catalytic performance of Au/Li-TiO2 was investigated using the degradation of rhodamine B in water for a model reaction using UVb and visible light. The high surface area of the anatase shells provides direct access for the reactant molecules to diffuse and subsequently interact with the gold cores. [Figure not available: see fulltext.]