Journal
CATALYSTS
Volume 11, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/catal11091039
Keywords
photocatalysts; TiO2; metal ions; pollutant degradations
Categories
Funding
- Key Laboratory for Catalyst Synthesis Technology of Polymer of Liaoning Province, China
- Discipline Team Building Program of Shenyang University of Technology
- Shenyang University of Technology, China
- Universiti Malaysia Kelantan, Malaysia
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TiO2 is a widely used semiconductor material in various fields, but its photocatalytic activity in UV light is low; to enhance its efficiency, metal ions are used to modify TiO2 by increasing active sites on the crystal surface or inhibiting electron-hole recombination rates.
TiO2 is a semiconductor material with high chemical stability and low toxicity. It is widely used in the fields of catalysis, sensing, hydrogen production, optics and optoelectronics. However, TiO2 photocatalyst is sensitive to ultraviolet (UV) light; this is why its photocatalytic activity and quantum efficiency are reduced. To enhance the photocatalytic efficiency in the visible light range as well as to increase the number of the active sites on the crystal surface or inhibit the recombination rate of photogenerated electron-hole pairs electrons, various metal ions were used to modify TiO2. This review paper comprehensively summarizes the latest progress on the modification of TiO2 photocatalyst by a variety of metal ions. Lastly, the future prospects of the modification of TiO2 as a photocatalyst are proposed.
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