@article{Wang2025, 
author = {Weiye Wang and Xueting Sun and Zhuang Guo and Yue Liu and Huishan Shang and Jinlong Ge and Jian Wei and Yan Gao and Yonghui Song},
title = {Enhanced catalytic ozonation by O-doped g-C3N4/CuO: Synergistic multi-active sites for broad pH applicability},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {12},
pages = {94908079},
keywords = {reactive oxygen species, wide pH range, catalytic ozonation, O-doped g-C3N4/CuO},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94908079},
doi = {10.26599/NR.2025.94908079},
abstract = {Developing high-performance catalysts suitable for a wide pH range in catalytic ozonation system remains a significant challenge, primarily owing to the limitations imposed by metal species and the pH at the point of zero charge. In this study, an O doped g-C3N4/CuO (CNO-CuO) catalyst was synthesized via a facile method. Compared to pristine g-C3N4/CuO (CN-CuO), CNO-CuO dramatically enhanced the degradation efficiency of pollutants from 25% to 100% in acidic solutions. Moreover, it exhibited the efficient degradation efficiencies across a broad pH range (3–10), demonstrating that introduction of O atoms considerably improved the universality of CNO-CuO. Experimental and theoretical studies revealed that the synergistic interaction between CuO and C–O bonds was responsible for the remarkable catalytic ozonation activity over a wide pH range. Crucially, the incorporation of O atoms contributed to reversible formation of Cu+, ensuring the continuous regeneration of active sites and the sustained formation of ·OH. Additionally, the C–O bond acted as a potential catalytic active site, further enhancing treatment efficiency as pH increased. This work provided a feasible strategy for broadening catalyst applicability in catalytic ozonation systems through heteroatom doping.}
}