Rational Construction of LaFeO3 Perovskite Nanoparticle-Modified TiO2 Nanotube Arrays for Visible-Light Driven Photocatalytic Activity

Coatings

Jianying Huang¹  Yuekun Lai¹  Mingzheng Ge²  Yuxin Tang³  Zeyang Zhang⁴  Changjian Lin⁴  Lan Sun⁴  Jiangdong Yu⁴  Siwan Xiang⁴ 

[1] College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China;College of Textile and Clothing Engineering, Soochow University, Suzhou 215006, China;School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;State Key Laboratory of Physical Chemistry of Solid Surface, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;

关键词: TiO₂ nanotube;    LaFeO₃;    perovskite;    heterojunction;    visible light driven;    photocatalysis;   

DOI  :  10.3390/coatings8110374

来源: DOAJ

【 摘 要 】

LaFeO₃ nanoparticle-modified TiO₂ nanotube arrays were fabricated through facile hydrothermal growth. The absorption edge of LaFeO₃ nanoparticle-modified TiO₂ nanotube arrays displaying a red shift to ~540 nm was indicated by the results of diffuse reflectance spectroscopy (DRS) when compared to TiO₂ nanotube arrays, which means that the sample of LaFeO₃ nanoparticle-modified TiO₂ nanotube arrays had enhanced visible light response. Photoluminescence (PL) spectra showed that the LaFeO₃ nanoparticle-modified TiO₂ nanotube arrays efficiently separated the photoinduced electron⁻hole pairs and effectively prolonged the endurance of photogenerated carriers. The results of methylene blue (MB) degeneration under simulated visible light illumination showed that the photocatalytic activity of LaFeO₃ nanoparticle-modified TiO₂ nanotube arrays is obviously increased. LaFeO₃ nanoparticle-modified TiO₂ nanotube arrays with 12 h hydrothermal reaction time showed the highest degradation rate with a 2-fold enhancement compared with that of pristine TiO₂ nanotube arrays.

【 授权许可】

Unknown