Citation: Yingqi BAI, Hua ZHAO, Huipeng LI, Xinran REN, Jun LI. Perovskite LaCoO₃/g-C₃N₄ heterojunction: Construction and photocatalytic degradation properties[J]. Chinese Journal of Inorganic Chemistry, ;2025, 41(3): 480-490. doi: 10.11862/CJIC.20240259 shu

Perovskite LaCoO₃/g-C₃N₄ heterojunction: Construction and photocatalytic degradation properties

School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, Liaoning 113001, China

Corresponding author: Huipeng LI, fslhp@sina.com
Received Date: 8 July 2024
Revised Date: 26 December 2024

Figures(12)

Lanthanum cobaltate (LaCoO₃, LCO) was first prepared by the citric acid-assisted sol-gel method, and the hydrothermal method prepared LaCoO₃/g-C₃N₄ (LCO/CN) p-n heterojunction composite photocatalysts. The LCO/CN was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), and photoluminescence (PL) spectroscopy. Its photocatalytic degradation of tetracycline hydrochloride (TC) was evaluated, and the reactive groups that play a role in the photocatalytic reaction were verified using free radical trappers and the reaction mechanism was hypothesized. The results showed that the composite of LCO and CN significantly enhanced the photocatalytic activity of CN, and the 10%LCO/CN prepared with a mass ratio of 10% of LCO to CN exhibited the best photocatalytic performance, with a high degradation rate of 96.2% of 10 mg·L^-1 TC in 120 min, and a reaction rate constant of 0.018 93 min^-1, 3.04-fold and 1.93-fold higher than that of CN and LCO, respectively. The results of three recycling experiments showed that the degradation rate of TC by 10%LCO/CN decreased less, indicating that the catalyst had good stability and practicability.
- g-C₃N₄,
- LaCoO₃,
- tetracycline hydrochloride,
- heterojunction,
- photocatalysis
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Perovskite LaCoO3/g-C3N4 heterojunction: Construction and photocatalytic degradation properties

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Perovskite LaCoO₃/g-C₃N₄ heterojunction: Construction and photocatalytic degradation properties