Supersonically sprayed copper oxide titania nanowires for antibacterial activities and water purification

Chanwoo Park; Joo Hyun Hong; Byeong Yeop Kim; Seongpil An; Sam S. Yoon

doi:10.1016/j.apsusc.2022.155513

Supersonically sprayed copper oxide titania nanowires for antibacterial activities and water purification

Chanwoo Park, Joo Hyun Hong, Byeong Yeop Kim, Seongpil An, Sam S. Yoon

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Copper and TiO₂ particles are supersonically sprayed to produce nanowire surfaces for bacterial disinfection and water purification. Supersonically sprayed copper oxide (CuO) and titania (TiO₂) are transformed into nanowires after annealing. The presence of these nanowires facilitates efficient interfacial antibacterial activities. A pure CuO film (without TiO₂) does not become photoactive under ultraviolet (UV) irradiation; nevertheless, it can inhibit Escherichia coli (E. Coli) by up to 70.8%. The inhibition rate of E. coli on a CuO/TiO₂ composite under UV irradiation is 100%, which demonstrates the excellent photo-killing activity of TiO₂. Thus, the CuO/TiO₂ composite is superior to the pure CuO film in terms of its photo-killing capability. However, the use of a pure CuO film is preferred to that of a TiO₂ film when UV irradiation is not available. The water contact angle of the CuO/TiO₂ composite confirms its superhydrophilicity, which can attract bacteria-containing aerosols in the air, thereby reducing air contamination. The textured surfaces of these films are characterized using scanning electron microscopy, three-dimensional optical profilometry, X-ray photoelectron spectroscopy, and transmission electron microscopy.

Original language	English
Article number	155513
Journal	Applied Surface Science
Volume	611
DOIs	https://doi.org/10.1016/j.apsusc.2022.155513
Publication status	Published - 2023 Feb 15

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government NRF-2020R1A5A1018153, NRF-2021R1A2C2010530, and 2022M3J1A106422611. This research was also supported by Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare, Republic of Korea (grant number: HI21C0049010021) and K2211851.

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

Aerosol deposition
Antibacterial activity
CuO nanowires
Supersonic cold spraying
Water purification

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Physics and Astronomy(all)
Surfaces and Interfaces
Surfaces, Coatings and Films

Access to Document

10.1016/j.apsusc.2022.155513

Cite this

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title = "Supersonically sprayed copper oxide titania nanowires for antibacterial activities and water purification",

abstract = "Copper and TiO2 particles are supersonically sprayed to produce nanowire surfaces for bacterial disinfection and water purification. Supersonically sprayed copper oxide (CuO) and titania (TiO2) are transformed into nanowires after annealing. The presence of these nanowires facilitates efficient interfacial antibacterial activities. A pure CuO film (without TiO2) does not become photoactive under ultraviolet (UV) irradiation; nevertheless, it can inhibit Escherichia coli (E. Coli) by up to 70.8%. The inhibition rate of E. coli on a CuO/TiO2 composite under UV irradiation is 100%, which demonstrates the excellent photo-killing activity of TiO2. Thus, the CuO/TiO2 composite is superior to the pure CuO film in terms of its photo-killing capability. However, the use of a pure CuO film is preferred to that of a TiO2 film when UV irradiation is not available. The water contact angle of the CuO/TiO2 composite confirms its superhydrophilicity, which can attract bacteria-containing aerosols in the air, thereby reducing air contamination. The textured surfaces of these films are characterized using scanning electron microscopy, three-dimensional optical profilometry, X-ray photoelectron spectroscopy, and transmission electron microscopy.",

keywords = "Aerosol deposition, Antibacterial activity, CuO nanowires, Supersonic cold spraying, Water purification",

author = "Chanwoo Park and Hong, {Joo Hyun} and Kim, {Byeong Yeop} and Seongpil An and Yoon, {Sam S.}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government NRF-2020R1A5A1018153, NRF-2021R1A2C2010530, and 2022M3J1A106422611. This research was also supported by Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare, Republic of Korea (grant number: HI21C0049010021) and K2211851. Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

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AU - Kim, Byeong Yeop

AU - An, Seongpil

AU - Yoon, Sam S.

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government NRF-2020R1A5A1018153, NRF-2021R1A2C2010530, and 2022M3J1A106422611. This research was also supported by Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare, Republic of Korea (grant number: HI21C0049010021) and K2211851. Publisher Copyright: © 2022 Elsevier B.V.

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Y1 - 2023/2/15

N2 - Copper and TiO2 particles are supersonically sprayed to produce nanowire surfaces for bacterial disinfection and water purification. Supersonically sprayed copper oxide (CuO) and titania (TiO2) are transformed into nanowires after annealing. The presence of these nanowires facilitates efficient interfacial antibacterial activities. A pure CuO film (without TiO2) does not become photoactive under ultraviolet (UV) irradiation; nevertheless, it can inhibit Escherichia coli (E. Coli) by up to 70.8%. The inhibition rate of E. coli on a CuO/TiO2 composite under UV irradiation is 100%, which demonstrates the excellent photo-killing activity of TiO2. Thus, the CuO/TiO2 composite is superior to the pure CuO film in terms of its photo-killing capability. However, the use of a pure CuO film is preferred to that of a TiO2 film when UV irradiation is not available. The water contact angle of the CuO/TiO2 composite confirms its superhydrophilicity, which can attract bacteria-containing aerosols in the air, thereby reducing air contamination. The textured surfaces of these films are characterized using scanning electron microscopy, three-dimensional optical profilometry, X-ray photoelectron spectroscopy, and transmission electron microscopy.

AB - Copper and TiO2 particles are supersonically sprayed to produce nanowire surfaces for bacterial disinfection and water purification. Supersonically sprayed copper oxide (CuO) and titania (TiO2) are transformed into nanowires after annealing. The presence of these nanowires facilitates efficient interfacial antibacterial activities. A pure CuO film (without TiO2) does not become photoactive under ultraviolet (UV) irradiation; nevertheless, it can inhibit Escherichia coli (E. Coli) by up to 70.8%. The inhibition rate of E. coli on a CuO/TiO2 composite under UV irradiation is 100%, which demonstrates the excellent photo-killing activity of TiO2. Thus, the CuO/TiO2 composite is superior to the pure CuO film in terms of its photo-killing capability. However, the use of a pure CuO film is preferred to that of a TiO2 film when UV irradiation is not available. The water contact angle of the CuO/TiO2 composite confirms its superhydrophilicity, which can attract bacteria-containing aerosols in the air, thereby reducing air contamination. The textured surfaces of these films are characterized using scanning electron microscopy, three-dimensional optical profilometry, X-ray photoelectron spectroscopy, and transmission electron microscopy.

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Supersonically sprayed copper oxide titania nanowires for antibacterial activities and water purification

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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