TiO₂ coating prepared by mechanical alloying treatment for photocatalytic degradation

ABSTRACT

In this study, a nanostructured TiO₂ coating was successfully prepared on a large-scale titanium plate by a simple one-step surface mechanical alloying (SMA) treatment. The coating was characterised to determine the morphological and composition changes with SMA. The coating was ∼60 μm thick and composed of 5 nm diameter rutile TiO₂ particles. The photocatalytic activity of the nanostructured TiO₂ coating was studied via the ultraviolet–visible (UV–vis) decolorisation of aqueous rhodamine-B. The results showed that the photocatalytic degradation effect in 5 h of the φ30 mm nanostructured TiO₂ coating was comparable to that of 20 mg raw TiO₂ under similar UV–visible light irradiation. One-step SMA was demonstrated as an appropriate method to produce a high-performance photocatalytic plate.

KEYWORDS:

• Photocatalysis
• organic dye degradation
• black TiO₂
• nanostructured TiO₂ coating
• surface mechanical alloying

Disclosure statement

The authors declare no conflict of interest.

ORCID

Tong Weiping http://orcid.org/0000-0001-9052-0867

Additional information

Funding

This research was supported by the National Natural Science Foundation of China (U1360102 and 51701057).