Bi@Bi₄Ti₃O₁₂/TiO₂ films on glass with photocatalytic and self‐cleaning performance

Abstract

A stable and translucent Bi@Bi4Ti3O12/TiO2 film was fabricated on conventional glass substrates for the first time. The film exhibited a good photocatalytic performance and efficient self‐cleaning capability against organic dyes under full spectral irradiation and visible light irradiation. Bi4Ti3O12/TiO2 film was first prepared on a glass substrate with colloidal silica as a high temperature binder, followed by implantation of nanoscale Bi in it by an in‐situ partially reduction of Bi4Ti3O12 to generate Bi@Bi4Ti3O12/TiO2 films. The improved photocatalytic ability is probably attributed to the surface plasmon resonance of Bi atom as well as the enhanced electron transfer efficiency and synergistic effect of Bi4Ti3O12 and TiO2. According to trapping experiments, hydroxyl radicals (OH) were active species in the photocatalytic degradation of dyes under full spectral light irradiation and possible photocatalytic mechanism was proposed. The film prepared in this work may well have potential practical applications in many aspects, such as cleansing treatments for high building external decorative panels and also systematic characterization of the film suggests that the in‐situ reduction is an effective and simple way to produce nanoscale Bi@Bi4Ti3O12.

One Step Synthesis of Oxygen Defective Bi@Ba2TiO4/BaBi4Ti4O15 Microsheet with Efficient Photocatalytic Activity for NO Removal

“…The two strongest secondary phase diffraction peaks appear at 2θ = 28.81 • and 29.31 • , which are close to the (2 1 1) and (0 3 1) crystal peaks of the Ba 2 TiO 4 structure [27]. In addition, the two diffraction peaks at 2θ = 22.5 • , 27.2 • could be attributed to metallic Bi reflections, which are connected to the (0 0 3) and (0 1 2) planes [28]. As can be seen, BT/BBT is composed of BaBi 4 Ti 4 O 15 and Ba 2 TiO 4 .…”

The effect of layer thickness on adsorption and catalytic activity of sandwich‐like ceramics

“…The most common and well-established methods for producing multilayer films are dip-coating, 4 spin-coating, 5 atomic layer deposition, 6 electrostatic layer-by-layer self-assembly, 7 and magnetron sputtering. 8 The advantage of these methods is a smooth surface of the obtained coatings.…”