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

Abstract

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.

Substantial enhancement in the photocatalytic degradation of organic/inorganic pollutants in water and photoelectrochemical activity using TiO2@Ag@LaFeO3 core–shell nanorods

“…Thus, the position of the conduction band and the valence band was calculated using the formula E CB = X − E e − 0.5 E g and E CB = E VB − E g , respectively. 31 The band gap energy of the semiconductor, the energy of free electrons (about 4.5 eV), and the electronegativity of the semiconductor are represented by E g , E e , and X , respectively. TiO 2 and LaFeO 3 have X values of about 5.8 and 5.7 eV, respectively.…”

LaFeO3 meets nitrogen-doped graphene functionalized with ultralow Pt loading in an impactful Z-scheme platform for photocatalytic hydrogen evolution

“…Thus, direct Z-scheme photocatalyst systems offer better light-induced charge carrier transfer and separation, and hence photocatalytic performance, than their counterparts. [13][14][15] In this regard, LaFeO 3 , one of the most commonly used perovskite oxides, 16,17 is considered as a suitable PS II entity for direct Z-scheme hydrogen evolution systems owing to its low positive CB potential of 0.2 V (vs. NHE), 18 which limits the generation of hydrogen. Perovskite LaFeO 3 has great potential for application in the eld of photocatalysis owing to its lowcost production, high stability, non-toxicity, and low bandgap energy (2.4 eV).…”

Multifunctional fabrics finished using electrosprayed hybrid Janus particles containing nanocatalysts

“…In the literature, inorganic nanoparticles (NPs) and nanotubes made of materials such as SiO2 [27,28], ZnO [29][30][31][32], Ag [33][34][35][36][37], CuO [38], MoS2 [39], and TiO2 [40][41][42][43][44] have all been demonstrated be suitable for the preparation of functional fabrics [45,46]. TiO2 NPs have received particular attention for preparing multi-functional fabrics owing to their stability, high surface activity, non-toxic and biocompatible nature, and antibacterial properties after irradiation with UV light [47,48].…”