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Perovskite LaCoO3/g-C3N4 heterojunction: Construction and photocatalytic degradation properties
Author NameAffiliationE-mail
BAI Yingqi School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, Liaoning 113001, China  
ZHAO Hua School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, Liaoning 113001, China  
LI Huipeng School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, Liaoning 113001, China fslhp@sina.com 
REN Xinran School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, Liaoning 113001, China  
LI Jun School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, Liaoning 113001, China  
Abstract: 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.
Keywords: g-C3N4  LaCoO3  tetracycline hydrochloride  heterojunction  photocatalysis
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BAI Yingqi,ZHAO Hua,LI Huipeng,REN Xinran,LI Jun.Perovskite LaCoO3/g-C3N4 heterojunction: Construction and photocatalytic degradation properties[J].Chinese Journal of Inorganic Chemistry,2025,41(3):480-490.
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Chinese Journal of Inorganic Chemistry