Yao Jiaxin, Gao Feng, Zhao Yi, Tian Yajie, Yu Xin, Tang Yanting
Henan Engineering Research Center of Resource & Energy Recovery from Waste, School of Energy Science and Technology, Henan University, Zhengzhou 450046, China.
Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China.
J Colloid Interface Sci. 2025 Nov;697:137938. doi: 10.1016/j.jcis.2025.137938. Epub 2025 May 20.
Fabricating semiconductor photocatalysts with abundant oxygen vacancies and porous structures contributes to charge separation and surface photocatalytic degradation reactions. In this work, porous Cl-NbO nanostructures were synthesized via a calcination method using NbCl as the niobium and chlorine sources to achieve efficient tetracycline degradation under visible-light irradiation. Porous NbO nanostructures were formed during the calcination process accompanied by the generation of oxygen vacancies. The obtained Cl-NbO samples demonstrated significantly enhanced photocatalytic performance compared to commercial NbO. The synthesized Cl-NbO-450 sample exhibited the highest photocatalytic performance, achieving a maximal rate constant of 0.03093 min, which markedly surpassed that of commercial NbO. The remarkable enhancement in tetracycline degradation of the Cl-NbO photocatalysts was mainly attributed to the generation of oxygen vacancies and porous structures with large surface areas. Finally, the photodegradation pathways of tetracycline facilitated by the Cl-NbO photocatalysts and a plausible photocatalytic mechanism of the Cl-NbO photocatalysts were also investigated in this work.
