Palladium metal oxide/hydroxide clustered cobalt oxide co-loading on acid treated TiO2 nanorods for degradation of organic pollutants and Salmonella typhimurium inactivation under simulated solar light

Ho Sub Bae; Mahadeo A. Mahadik; Young Seok Seo; Won Sik Chae; Hee Suk Chung; Hyeon Ih Ryu; Min Cho; Patrick J. Shea; Sun Hee Choi; Jum Suk Jang

doi:10.1016/j.cej.2020.127260

Palladium metal oxide/hydroxide clustered cobalt oxide co-loading on acid treated TiO₂ nanorods for degradation of organic pollutants and Salmonella typhimurium inactivation under simulated solar light

Ho Sub Bae, Mahadeo A. Mahadik, Young Seok Seo, Won Sik Chae, Hee Suk Chung, Hyeon Ih Ryu, Min Cho, Patrick J. Shea, Sun Hee Choi, Jum Suk Jang

School of Natural Resources

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

24 Scopus citations

Abstract

Here, metal oxides/hydroxide (MO = (PdO)_n·[Pd(OH)₂]_m, Co(OH)₂, and (PdO)_n·[Pd(OH)₂]_m/CoO, n > m) clusters were successfully co-loaded on the surface of acid-treated molten salt fluxed TiO₂ nanorods (ATO-NRs) via conventional wet impregnation. The synergistic effect of palladium oxide/palladium hydroxide and cobalt oxide [((PdO)_n·[Pd(OH)₂]_m/CoO)] co-loading on ATO-NR demonstrated by the photocatalytic degradation of Orange II dye, bisphenol A and S. typhimurium inactivation under mimicked and unfiltered solar light (Xe arc lamp) radiation. Optimum [((PdO)_n·[Pd(OH)₂]_m/CoO)] co-loaded ATO-NRs exhibited significantly higher degradation efficiency (Orange II (91%) and BPA (97%) within 30 min of treatment) over (PdO)_n·[Pd(OH)₂]_m (n > m) and CoO/ATO-NRs under Xe arc lamp light radiation. Also, optimal sample showed higher inactivation efficiency for S. typhimurium than (PdO)_n·[Pd(OH)₂]_m (n > m)/ATO and CoO/ATO-NRs under UVA light radiation, however, the photocatalytic mechanisms for S. typhimurium inactivation was different than the BPA. Photoelectrochemical analyses demonstrated that the significantly accelerated charge-transfer process in metal oxides/hydroxide cluster [(PdO)_n·[Pd(OH)₂]_m/CoO] co-loaded ATO-NRs leading to higher degradation efficiency than other studied samples. Radical trapping supports h⁺ and O₂^[rad]− as major reactive species, with OH^[rad] playing a secondary role in Orange II and BPA degradation. Cell membrane interruption by reactive oxygen species (ROS) and reactions of photocatalyst with the –NH and –COOH group of protein and metalloproteins, nucleic acid in bacterial cells could be the main cause in S. typhimurium disinfection. Plausible charge transport pathways were proposed for photocatalytic degradation of organic pollutants and bacterial inactivation over the (PdO)_n·[Pd(OH)₂]_m/CoO/ATO-NR's.

Original language	English (US)
Article number	127260
Journal	Chemical Engineering Journal
Volume	408
DOIs	https://doi.org/10.1016/j.cej.2020.127260
State	Published - Mar 15 2021

Keywords

Antibacterial activity
Metal oxide/hydroxide co-loaded ATO nanorods
Orange II dye degradation
Photocatalytic degradation
Synergistic effect

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

Access to Document

10.1016/j.cej.2020.127260

Cite this

Bae, H. S., Mahadik, M. A., Seo, Y. S., Chae, W. S., Chung, H. S., Ryu, H. I., Cho, M., Shea, P. J., Choi, S. H., & Jang, J. S. (2021). Palladium metal oxide/hydroxide clustered cobalt oxide co-loading on acid treated TiO₂ nanorods for degradation of organic pollutants and Salmonella typhimurium inactivation under simulated solar light. Chemical Engineering Journal, 408, Article 127260. https://doi.org/10.1016/j.cej.2020.127260

Palladium metal oxide/hydroxide clustered cobalt oxide co-loading on acid treated TiO₂ nanorods for degradation of organic pollutants and Salmonella typhimurium inactivation under simulated solar light. / Bae, Ho Sub; Mahadik, Mahadeo A.; Seo, Young Seok et al.
In: Chemical Engineering Journal, Vol. 408, 127260, 15.03.2021.

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

Bae, HS, Mahadik, MA, Seo, YS, Chae, WS, Chung, HS, Ryu, HI, Cho, M, Shea, PJ, Choi, SH & Jang, JS 2021, 'Palladium metal oxide/hydroxide clustered cobalt oxide co-loading on acid treated TiO₂ nanorods for degradation of organic pollutants and Salmonella typhimurium inactivation under simulated solar light', Chemical Engineering Journal, vol. 408, 127260. https://doi.org/10.1016/j.cej.2020.127260

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title = "Palladium metal oxide/hydroxide clustered cobalt oxide co-loading on acid treated TiO2 nanorods for degradation of organic pollutants and Salmonella typhimurium inactivation under simulated solar light",

abstract = "Here, metal oxides/hydroxide (MO = (PdO)n·[Pd(OH)2]m, Co(OH)2, and (PdO)n·[Pd(OH)2]m/CoO, n > m) clusters were successfully co-loaded on the surface of acid-treated molten salt fluxed TiO2 nanorods (ATO-NRs) via conventional wet impregnation. The synergistic effect of palladium oxide/palladium hydroxide and cobalt oxide [((PdO)n·[Pd(OH)2]m/CoO)] co-loading on ATO-NR demonstrated by the photocatalytic degradation of Orange II dye, bisphenol A and S. typhimurium inactivation under mimicked and unfiltered solar light (Xe arc lamp) radiation. Optimum [((PdO)n·[Pd(OH)2]m/CoO)] co-loaded ATO-NRs exhibited significantly higher degradation efficiency (Orange II (91%) and BPA (97%) within 30 min of treatment) over (PdO)n·[Pd(OH)2]m (n > m) and CoO/ATO-NRs under Xe arc lamp light radiation. Also, optimal sample showed higher inactivation efficiency for S. typhimurium than (PdO)n·[Pd(OH)2]m (n > m)/ATO and CoO/ATO-NRs under UVA light radiation, however, the photocatalytic mechanisms for S. typhimurium inactivation was different than the BPA. Photoelectrochemical analyses demonstrated that the significantly accelerated charge-transfer process in metal oxides/hydroxide cluster [(PdO)n·[Pd(OH)2]m/CoO] co-loaded ATO-NRs leading to higher degradation efficiency than other studied samples. Radical trapping supports h+ and O2[rad]− as major reactive species, with OH[rad] playing a secondary role in Orange II and BPA degradation. Cell membrane interruption by reactive oxygen species (ROS) and reactions of photocatalyst with the –NH and –COOH group of protein and metalloproteins, nucleic acid in bacterial cells could be the main cause in S. typhimurium disinfection. Plausible charge transport pathways were proposed for photocatalytic degradation of organic pollutants and bacterial inactivation over the (PdO)n·[Pd(OH)2]m/CoO/ATO-NR's.",

keywords = "Antibacterial activity, Metal oxide/hydroxide co-loaded ATO nanorods, Orange II dye degradation, Photocatalytic degradation, Synergistic effect",

author = "Bae, {Ho Sub} and Mahadik, {Mahadeo A.} and Seo, {Young Seok} and Chae, {Won Sik} and Chung, {Hee Suk} and Ryu, {Hyeon Ih} and Min Cho and Shea, {Patrick J.} and Choi, {Sun Hee} and Jang, {Jum Suk}",

note = "Funding Information: This research was supported by the Korea Research Fellow-ship Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (2017H1D3A1A02014020). This work was also supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (Nos. 2019R1A2C1006402 and 2018R1D1A1B07043453 ). Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2021",

month = mar,

day = "15",

doi = "10.1016/j.cej.2020.127260",

language = "English (US)",

volume = "408",

journal = "Chemical Engineering Journal",

issn = "1385-8947",

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TY - JOUR

T1 - Palladium metal oxide/hydroxide clustered cobalt oxide co-loading on acid treated TiO2 nanorods for degradation of organic pollutants and Salmonella typhimurium inactivation under simulated solar light

AU - Bae, Ho Sub

AU - Mahadik, Mahadeo A.

AU - Seo, Young Seok

AU - Chae, Won Sik

AU - Chung, Hee Suk

AU - Ryu, Hyeon Ih

AU - Cho, Min

AU - Shea, Patrick J.

AU - Choi, Sun Hee

AU - Jang, Jum Suk

N1 - Funding Information: This research was supported by the Korea Research Fellow-ship Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (2017H1D3A1A02014020). This work was also supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (Nos. 2019R1A2C1006402 and 2018R1D1A1B07043453 ). Publisher Copyright: © 2020 Elsevier B.V.

PY - 2021/3/15

Y1 - 2021/3/15

N2 - Here, metal oxides/hydroxide (MO = (PdO)n·[Pd(OH)2]m, Co(OH)2, and (PdO)n·[Pd(OH)2]m/CoO, n > m) clusters were successfully co-loaded on the surface of acid-treated molten salt fluxed TiO2 nanorods (ATO-NRs) via conventional wet impregnation. The synergistic effect of palladium oxide/palladium hydroxide and cobalt oxide [((PdO)n·[Pd(OH)2]m/CoO)] co-loading on ATO-NR demonstrated by the photocatalytic degradation of Orange II dye, bisphenol A and S. typhimurium inactivation under mimicked and unfiltered solar light (Xe arc lamp) radiation. Optimum [((PdO)n·[Pd(OH)2]m/CoO)] co-loaded ATO-NRs exhibited significantly higher degradation efficiency (Orange II (91%) and BPA (97%) within 30 min of treatment) over (PdO)n·[Pd(OH)2]m (n > m) and CoO/ATO-NRs under Xe arc lamp light radiation. Also, optimal sample showed higher inactivation efficiency for S. typhimurium than (PdO)n·[Pd(OH)2]m (n > m)/ATO and CoO/ATO-NRs under UVA light radiation, however, the photocatalytic mechanisms for S. typhimurium inactivation was different than the BPA. Photoelectrochemical analyses demonstrated that the significantly accelerated charge-transfer process in metal oxides/hydroxide cluster [(PdO)n·[Pd(OH)2]m/CoO] co-loaded ATO-NRs leading to higher degradation efficiency than other studied samples. Radical trapping supports h+ and O2[rad]− as major reactive species, with OH[rad] playing a secondary role in Orange II and BPA degradation. Cell membrane interruption by reactive oxygen species (ROS) and reactions of photocatalyst with the –NH and –COOH group of protein and metalloproteins, nucleic acid in bacterial cells could be the main cause in S. typhimurium disinfection. Plausible charge transport pathways were proposed for photocatalytic degradation of organic pollutants and bacterial inactivation over the (PdO)n·[Pd(OH)2]m/CoO/ATO-NR's.

AB - Here, metal oxides/hydroxide (MO = (PdO)n·[Pd(OH)2]m, Co(OH)2, and (PdO)n·[Pd(OH)2]m/CoO, n > m) clusters were successfully co-loaded on the surface of acid-treated molten salt fluxed TiO2 nanorods (ATO-NRs) via conventional wet impregnation. The synergistic effect of palladium oxide/palladium hydroxide and cobalt oxide [((PdO)n·[Pd(OH)2]m/CoO)] co-loading on ATO-NR demonstrated by the photocatalytic degradation of Orange II dye, bisphenol A and S. typhimurium inactivation under mimicked and unfiltered solar light (Xe arc lamp) radiation. Optimum [((PdO)n·[Pd(OH)2]m/CoO)] co-loaded ATO-NRs exhibited significantly higher degradation efficiency (Orange II (91%) and BPA (97%) within 30 min of treatment) over (PdO)n·[Pd(OH)2]m (n > m) and CoO/ATO-NRs under Xe arc lamp light radiation. Also, optimal sample showed higher inactivation efficiency for S. typhimurium than (PdO)n·[Pd(OH)2]m (n > m)/ATO and CoO/ATO-NRs under UVA light radiation, however, the photocatalytic mechanisms for S. typhimurium inactivation was different than the BPA. Photoelectrochemical analyses demonstrated that the significantly accelerated charge-transfer process in metal oxides/hydroxide cluster [(PdO)n·[Pd(OH)2]m/CoO] co-loaded ATO-NRs leading to higher degradation efficiency than other studied samples. Radical trapping supports h+ and O2[rad]− as major reactive species, with OH[rad] playing a secondary role in Orange II and BPA degradation. Cell membrane interruption by reactive oxygen species (ROS) and reactions of photocatalyst with the –NH and –COOH group of protein and metalloproteins, nucleic acid in bacterial cells could be the main cause in S. typhimurium disinfection. Plausible charge transport pathways were proposed for photocatalytic degradation of organic pollutants and bacterial inactivation over the (PdO)n·[Pd(OH)2]m/CoO/ATO-NR's.

KW - Antibacterial activity

KW - Metal oxide/hydroxide co-loaded ATO nanorods

KW - Orange II dye degradation

KW - Photocatalytic degradation

KW - Synergistic effect

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