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The Role of Oxygen Vacancy and Other Defects for Activity Enhancement

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Green Photocatalytic Semiconductors

Part of the book series: Green Chemistry and Sustainable Technology ((GCST))

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Abstract

Titania (titanium(IV) oxide; TiO2) has been intensively studied for both fundamental and applied photocatalysis because of high photocatalytic activity, abundance, low costs, and stability. However, the inability of working under visible-light irradiation and recombination of charge carriers limit its broad commercialization. Accordingly, various methods of titania modification have been proposed, including the preparation of defect-rich titania samples. This chapter has focused on this aspect, discussing self-doped titania photocatalysts, including defect types, synthesis methods, and their applications for photocatalytic degradation of organic compounds and solar energy conversion. Additionally, more complex photocatalysts, such as self-doped titania co-modified with other elements (metals and nonmetals) and novel structures of titania, i.e., inverse opal photonic crystals with introduced defects, have also been discussed. Finally, antimicrobial properties of defective titania and other semiconductors have been presented, confirming that these photocatalysts are highly promising as effective, green, and cheap materials.

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Authors and Affiliations

  1. Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, 60-965, Poznan, Poland

    Marcin Janczarek

  2. Institute for Catalysis (ICAT), Hokkaido University, Sapporo, N21 W20, 001-0021, Japan

    Maya Endo-Kimura, Tharishinny Raja-Mogan & Ewa Kowalska

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  1. Marcin Janczarek
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  2. Maya Endo-Kimura
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  3. Tharishinny Raja-Mogan
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  4. Ewa Kowalska
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Correspondence to Ewa Kowalska .

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Editors and Affiliations

  1. Department of Chemistry, Amity Institute of Applied Sciences, Amity University, Noida, Uttar Pradesh, India

    Seema Garg

  2. Amity Institute of Pharmacy, Amity University, Noida, Uttar Pradesh, India

    Amrish Chandra

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Janczarek, M., Endo-Kimura, M., Raja-Mogan, T., Kowalska, E. (2022). The Role of Oxygen Vacancy and Other Defects for Activity Enhancement. In: Garg, S., Chandra, A. (eds) Green Photocatalytic Semiconductors. Green Chemistry and Sustainable Technology. Springer, Cham. https://doi.org/10.1007/978-3-030-77371-7_12

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