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Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received December 8, 2024
Revised April 29, 2025
Accepted June 2, 2025
Available online August 25, 2025

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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2D/1D Heterojunction of g‐C3N4/TiO2 as an Efficient Photocatalyst for NOx Removal

Pho Thi Le^{1 2} Khanh Quang Nguyen⁴ Tin Chanh Duc Doan² Viet Van Pham^4†

Institute for Nanotechnology, Vietnam National University ¹University of Science ²Vietnam National University ³Thu Dau Mot University ⁴Advanced Materials and Applications Research Group (AMA), HUTECH University

pv.viet@hutech.edu.vn

Korean Journal of Chemical Engineering, August 2025, 42(10), 2217-2229(13)
https://doi.org/10.1007/s11814-025-00494-1

Abstract

A novel S-scheme heterojunction photocatalyst based on 2D g-C3N4 nanosheets modified by 1D TiO2

nanotubes (TNTs)

has been successfully prepared. The successful fabrication of 2D/1D g-C3N4/TNTs S-scheme photocatalysts by hydrothermal

method and thermolysis processes was confirmed through a variety of characterization methods (HR-TEM, XRD, and

FTIR). The g-C3N4/TNTs S-scheme heterojunction expressed advances in the degradation of nitrogen oxide (NO), a harmful

environmental pollutant. In detail, 2D/1D g-C3N4/TNTs heterojunctions demonstrated the most effective decomposition of

NO and their ability to remain stable under visible-light conditions, achieving the removal of over 66.44% of NO at 550 ppb

during the entirety of the experiment.

Keywords

g-C3N4/TNTs · S-scheme · Photocatalysis · NOx removal · Visible light