Luminescence and photocatalytic performance of Ca1−xTiO3:Pr3+ material

• Published in: Integrated ferroelectrics Vol. 200; no. 1; pp. 90 - 98
• Main Authors: Yin, Qian, Yang, Ziqi, Qiu, Kehui, Zhang, Peicong
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis 24.07.2019; Taylor & Francis Ltd
• Subjects: calcium deficiency; Calcium titanate; Catalytic activity; Chemical composition; Diffuse reflectance spectroscopy; Light irradiation; Luminescence; Methylene blue; Morphology; Multifunctional materials; Organic chemistry; Oxidation; Perovskite; Perovskite structure; Perovskites; Photocatalysis; Photocatalysts; Photodegradation; Ultraviolet radiation; Ultraviolet reflection
• ISSN: 1058-4587; 1607-8489
• DOI: 10.1080/10584587.2019.1592624

Luminescent perovskite photocatalysts activated by Pr 3+ were prepared by combustion. The structural phase, morphology, and chemical composition of the as-prepared photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) analysis, and ultraviolet-visible (UV-vis) diffuse reflectance spectroscopy. The photocatalytic activities of the synthesized samples were investigated on the basis of the degradation of methylene blue (MB) under UV light irradiation. CaTiO 3 :Pr 3+ was obtained in high purity and good crystallinity with a perovskite structure. The degradation of the photocatalyst was fitted with pseudo-first-order kinetics according to the Langmuir-Hinshelwood model. Compared to CaTiO 3 :Pr 3+ , Ca 1- x TiO 3 :Pr 3+ (x = 0-0.3) multifunctional materials exhibit higher luminescence intensity and photocatalytic activity toward the degradation of MB. Ca 0.8 TiO 3 :0.1%Pr 3+ exhibited the best performance.