Photocatalytic Properties of Titania Nanostructures

Titanium dioxide (TiO₂) nanostructures have long been established as a benchmark photocatalyst owing to their chemical stability, non-toxicity and strong oxidation potential under illumination. At the nanoscale, control of crystal phase (anatase versus rutile), morphology (nanorods, hollow spheres, core-shell architectures) and surface composition (doping, heterojunctions) enhances light harvesting, charge separation and reactive-oxygen-species generation. Hollow and mesoporous constructs increase surface area and minimise recombination by shortening charge-carrier diffusion pathways. Coupling with plasmonic metals or metal-organic frameworks extends absorption into the visible region and further promotes interfacial charge transfer. Optimised TiO₂ nanostructures have found widespread application in pollutant degradation, water splitting for hydrogen production, self-cleaning coatings and antimicrobial surfaces. Recent advances emphasise scalable synthesis, phase engineering and the design of multi-component assemblies to balance optical absorption, carrier dynamics and long-term stability. Overall, the field continues to refine nanostructural parameters to maximise photocatalytic efficiency under solar irradiation and address global challenges of energy conversion and environmental remediation.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Photocatalytic Properties of Titania Nanostructures publication trend

The graph below shows the total number of articles in photocatalytic properties of titania nanostructures across all publications each year (not limited to Nature Index journals).

Technical terms

Photocatalysis: Acceleration of a chemical reaction by a semiconductor material under light exposure, generating reactive species to drive oxidation or reduction processes.

Anatase and Rutile: Two crystalline polymorphs of TiO₂ with differing band gaps and surface energies; anatase often favours charge separation, while rutile offers thermal stability.

Heterojunction: Interface between two different semiconductors or a semiconductor and metal, engineered to enhance charge-carrier separation and transfer.

Plasmonic Nanoparticles: Metal nanostructures (e.g. Au, Ag) that support collective electron oscillations, amplifying local electromagnetic fields and extending light absorption.

Core-Shell Architecture: Nanostructure consisting of a central ‘core’ material encapsulated by a distinct ‘shell’, used to combine functionalities or protect active surfaces.

Mesoporosity: Presence of pores with diameters between 2 and 50 nm, which increases surface area and enhances access of reactants to active sites.

References

1. Plasmonic Au nanoparticles supported on both sides of TiO2 hollow spheres for maximising photocatalytic activity under visible light. Frontiers of Chemical Science and Engineering (2019).
2. Effect of Calcination Temperature on the Structure, Crystallinity, and Photocatalytic Activity of Core-Shell SiO2@TiO2 and Mesoporous Hollow TiO2 Composites. Coatings (2023).
3. Near Infrared Reflection and Hydrophobic Properties of Composite Coatings Prepared from Hollow Glass Microspheres Coated with Needle-Shaped Rutile Shell. Materials (2022).