IDEAS home Printed from https://ideas.repec.org/a/gam/jsusta/v14y2021i1p85-d708718.html
   My bibliography  Save this article

Visible Domain Photocatalysis Performance of Ti-Si Thermal-Sprayed Coatings

Author

Listed:
  • Ionut Uncu

    (Materials Engineering and Welding Department, Transilvania University of Brasov, Eroilor 29 Blvd., 500039 Brasov, Romania)

  • Ionut Claudiu Roata

    (Materials Engineering and Welding Department, Transilvania University of Brasov, Eroilor 29 Blvd., 500039 Brasov, Romania)

  • Catalin Croitoru

    (Materials Engineering and Welding Department, Transilvania University of Brasov, Eroilor 29 Blvd., 500039 Brasov, Romania)

  • Teodor Machedon-Pisu

    (Materials Engineering and Welding Department, Transilvania University of Brasov, Eroilor 29 Blvd., 500039 Brasov, Romania)

Abstract

Cost and performance-effective materials used in advanced oxidation processes such as photocatalysis have obtained widespread attention in recent years. In this study, thermal spraying was used as a one-step method to obtain thick visible-light-active photocatalyst coatings on two types of substrates, namely, plain carbon steel and copper. A mixed metallic titanium–silicon powder bearing 10% wt. Si was used as feedstock. The optical bandgaps of the coatings were close to 1.000 eV, allowing good photodecoloration efficiencies (>89%) and mineralization efficiencies (>67%) for methylene blue dye from aqueous solutions under visible light irradiation. The photodegradation process could be successfully modelled by the Langmuir–Hinshelwood pseudo-first-order kinetic model, with reaction rate constants k between 0.16 and 1.06 h −1 .

Suggested Citation

  • Ionut Uncu & Ionut Claudiu Roata & Catalin Croitoru & Teodor Machedon-Pisu, 2021. "Visible Domain Photocatalysis Performance of Ti-Si Thermal-Sprayed Coatings," Sustainability, MDPI, vol. 14(1), pages 1-11, December.
    • Handle: RePEc:gam:jsusta:v:14:y:2021:i:1:p:85-:d:708718
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2071-1050/14/1/85/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/2071-1050/14/1/85/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Zhewei Hu & Jiaqi Shi & Hao Yang & Jianbo Huang & Feng Sheng, 2021. "How Organic Substances Promote the Chemical Oxidative Degradation of Pollutants: A Mini Review," Sustainability, MDPI, vol. 13(19), pages 1-14, October.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.

      Corrections

      All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jsusta:v:14:y:2021:i:1:p:85-:d:708718. See general information about how to correct material in RePEc.

      If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

      If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

      If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

      For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

      Please note that corrections may take a couple of weeks to filter through the various RePEc services.

      IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.