Preparation and photocatalytic properties of sillenite Bi12TiO20 films

Determination of the electronic, dielectric, and optical properties of sillenite Bi12TiO20 and perovskite-like Bi4Ti3O12 materials from hybrid first-principle calculations

“…2(b). The model contains four functional units (Bi 16 Ti 12 O 48 ) with 76 atoms. It shows a pseudoorthorhombic crystal structure in the Aba2 space group.…”

“…15 For example, sillenite Bi 12 TiO 20 and perovskite-like Bi 4 Ti 3 O 12 crystal structures are of particular interest because they are used in photocatalysis to degrade organic pollutants. [16][17][18][19] In addition, they are used in optoelectronic devices because of their photorefractive properties, and their high electro-optical coefficients make them applicable in the field of holographic interferometry. 20 On the other hand, perovskite-like Bi 4 Ti 3 O 12 has been used as a promising material for nonvolatile ferroelectric random access memories (FRAMs) because of its excellent fatigue resistance during repeated polarization reversals with an electric field.…”

“…takanabe@kaust.edu.sa electronic structure and band gap, which govern the photoconversion process, have not been well characterized. 17,[30][31][32][33] In the literature, their band gaps remain controversial, as they have been reported whether there is the presence 18,19 or absence 16 of a visible response. Furthermore, important characteristics such as the dielectric constant, charge carrier effective masses, and band edges have not been reported for these materials.…”

Photocatalytic Activity under Simulated Sunlight of Bi-Modified TiO2 Thin Films Obtained by Sol Gel

“…Particularly, bismuth oxide (α-Bi 2 O 3 ) has been reported as an efficient photocatalyst due to its unique structure and band gap energy close to 2.8 eV which makes it active in the visible region of the electromagnetic spectrum [5,6]. Several studies have reported that the system formed by mixtures of TiO 2 [7,8]. It is worth mentioning that the photocatalysts based on Bi 12 TiO 20 [9] and Bi 4 Ti 3 O 12 [10] crystals have been tested in the photodecolorization of methyl orange under UV irradiation showing high photocatalytic activity, similar in both cases.…”

One-step electrochemical synthesis and visible-light photocatalytic activities of bismuth titanate coatings: Effect of voltage

“…Presently, Bi 12 TiO 20 coatings have been successfully prepared for photodegradation waste water using chemical solution decomposition (CSD) technique [10]. However, the requirement of high temperature to facilitate crystallization of the asdeposited amorphous films, limited their application since the heat treatment frequently results in the deposited layers' crack.…”