Investigating the photocatalytic activity in bactericidal effect of iron(III) oxide bi-phase composite against Staphylococcus aureus

Tan Muon Dinh, Nguyen Thanh Loan, Hoang Hung Nguyen, Tran Viet Cuong, Vinh Quang Dang, Huynh Tran My Hoa
Author affiliations

Authors

  • Tan Muon Dinh \(^1\) Faculty of Materials Science and Technology, University of Science, Ho Chi Minh City, Viet Nam
    \(^2\) Vietnam National University, Vo Truong Toan Street, Linh Trung Ward, Ho Chi Minh City, Viet Nam
    \(^3\) VKTECH Research Center, NTT Hi-Tech Institute, Nguyen Tat Thanh University, Vo Chi Cong Street, Long Thanh My Ward, Ho Chi Minh City, Viet Nam
  • Nguyen Thanh Loan \(^3\) VKTECH Research Center, NTT Hi-Tech Institute, Nguyen Tat Thanh University, Vo Chi Cong Street, Long Thanh My Ward, Ho Chi Minh City, Viet Nam
    \(^4\) Center for Hi-Tech Development, Nguyen Tat Thanh University, Saigon Hi-Tech Park, Vo Chi Cong Street, Long Thanh My Ward, Ho Chi Minh City, Viet Nam
    https://orcid.org/0009-0001-9852-9652
  • Hoang Hung Nguyen \(^3\) VKTECH Research Center, NTT Hi-Tech Institute, Nguyen Tat Thanh University, Vo Chi Cong Street, Long Thanh My Ward, Ho Chi Minh City, Viet Nam
    \(^4\) Center for Hi-Tech Development, Nguyen Tat Thanh University, Saigon Hi-Tech Park, Vo Chi Cong Street, Long Thanh My Ward, Ho Chi Minh City, Viet Nam
  • Tran Viet Cuong \(^3\) VKTECH Research Center, NTT Hi-Tech Institute, Nguyen Tat Thanh University, Vo Chi Cong Street, Long Thanh My Ward, Ho Chi Minh City, Viet Nam
    \(^4\) Center for Hi-Tech Development, Nguyen Tat Thanh University, Saigon Hi-Tech Park, Vo Chi Cong Street, Long Thanh My Ward, Ho Chi Minh City, Viet Nam
    https://orcid.org/0000-0001-9225-6596
  • Vinh Quang Dang \(^1\) Faculty of Materials Science and Technology, University of Science, Ho Chi Minh City, Viet Nam
    \(^2\) Vietnam National University, Vo Truong Toan Street, Linh Trung Ward, Ho Chi Minh City, Viet Nam
  • Huynh Tran My Hoa \(^3\) VKTECH Research Center, NTT Hi-Tech Institute, Nguyen Tat Thanh University, Vo Chi Cong Street, Long Thanh My Ward, Ho Chi Minh City, Viet Nam
    \(^4\) Center for Hi-Tech Development, Nguyen Tat Thanh University, Saigon Hi-Tech Park, Vo Chi Cong Street, Long Thanh My Ward, Ho Chi Minh City, Viet Nam
    https://orcid.org/0000-0001-5763-5662

DOI:

https://doi.org/10.15625/2525-2518/19643

Keywords:

iron oxide, bi-phase, photocatalytic, bactericidal activity, Staphylococcus aureus

Abstract

This work describes the phase transition process used to create a bi-phase composite (called “α/γ-Fe2O3”) from two iron precursors (FeSO4 and FeCl3). It was discovered that controlling the temperature between 200 and 800 C was effective in both producing γ-Fe2O3 nanoparticles and initiating the phase transition of γ-Fe2O3 into α-Fe2O3 nanoparticles. The formation of a bi-phase mixture (α/γ-Fe2O3) occurred at 500 C when the phase transition process was taking place. Consequently, the bactericidal efficiency of this bi-phase α/γ-Fe2O3 composite was more excellent than that of the single-phase α-Fe2O3 or γ-Fe2O3 material (from 1.1 to 1.6 times, respectively). Here, the bi-phase contacts probably formed between the α- and γ- phase nanoparticles of Fe2O3 played an important role in reducing the electron-hole recombination, and thus, increasing the photocatalytic and bactericidal efficiency of the developed composite material. Overall, our findings highlight the potential of this bi-phase material for practical photocatalytic applications.

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Published

26-02-2026

How to Cite

Dinh, T. M., Loan, N. T., Nguyen, H. H., Cuong, T. V., Dang, V. Q., & Huynh Tran My Hoa. (2026). Investigating the photocatalytic activity in bactericidal effect of iron(III) oxide bi-phase composite against Staphylococcus aureus. Vietnam Journal of Science and Technology, 64(1), 87–99. https://doi.org/10.15625/2525-2518/19643

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