Abstract
TiO2 materials are considered to be promising photocatalysts, which have the advantages of high chemical stability, low-cost, nontoxic, and chemically stable properties. However, TiO2 is not able to fully utilize visible light due to the wide bandgap (~3.2eV) and its photo-accumulation carrier has a high recombination rate, which limits its practical applications. As light-harvesting antennas, plasmons are excellent visible light absorbers. So the combination of plasmon and TiO2 can make the best use of photogenerated charge carriers greatly. In this chapter, we summarize the plasmons-sensitized TiO2 materials as visible light–driven photocatalysts. Four types of plasmons, namely noble metal plasmons, nonnoble metal plasmons, metal–metal alloy plasmons, and metal compound plasmons, and the corresponding plasmonic photocatalytic mechanism are summarized. The prospect of future development of plasmons-sensitized photocatalysts is also proposed. The summary of plasmons will provide new insights for fabricating other high-performance plasmons-sensitized semiconductor photocatalysts.
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