Construction of a Bi₂WO₆/TiO₂ heterojunction and its photocatalytic degradation performance

Abstract

TiO2 was prepared by solvothermal method, and Bi2WO6/TiO2 heterojunction was constructed by hydrothermal method. XRD and SEM were used to analyze the crystal structure and morphology of composite photocatalysts with...

Activated Carbon-Loaded Titanium Dioxide Nanoparticles and Their Photocatalytic and Antibacterial Investigations

“…1 0 5), (2 1 1), (2 0 4 (1 1 6), (2 2 0), and (2 1 5) planes, respectively. The obtained values coincided well wit the anatase phase standard JCPDS card number: 89-4921 and their tetragonal structur [31,32]. The anatase phase stability is very high compared to other phases of titanium di oxide nanoparticles, which can accelerate the electron accumulations on the surfaces.…”

Catalytic degradation of methylene blue by biosynthesized Au nanoparticles on titanium dioxide (Au@TiO2)

“…(Bosch et al 2008, Fischer et al 2006, Schmitt &Flemming 1998) While in the FTIR spectra of bio-TiO 2 and bio-Au x @TiO 2 , the broad band around 1000 cm − 1 represented the stretching vibration of Ti-O-Ti bond. (Li et al 2022) Meanwhile, the bands at 3310 cm − 1 and 1610 cm − 1 , which were ascribed to -OH group and C = C bond stretching, were also appeared in the spectra of bio-TiO 2 and bio-Au x @TiO 2 .…”

Pt–Cu@Bi2MoO6/TiO2 Photocatalyst for CO2 Reduction

“…However, the high recombination rate of photogenerated electron–hole pairs, limited CO 2 adsorption capacity, and wide band gap are the main limitations of the TiO 2 photocatalyst . To overcome these limitations, various methods like morphology control, , impurity doping, − hybridization, and composite construction − have been employed to enhance visible light absorption capacity, limit the recombination rate of photoinduced electron–hole pairs, and thus enhance the photocatalytic activity in the visible light region. , Among these methods, coupling TiO 2 with other semiconductors with a narrow band gap leads to the formation of a heterojunction that has attracted attention due to the low recombination rate of electron–hole pairs and enhanced visible light absorption. − Bi-based semiconductors with narrow band gaps are a good candidate for combining with TiO 2 to form a heterojunction. − Bi doping was reported to enhance the CO 2 adsorption capacity of TiO 2 photocatalysts due to the oxygen vacancy formation . Combining of TiO 2 with Bi-based semiconductors is an effective strategy to improve the photocatalytic activity because the advantages of each component can be combined in composite photocatalysts .…”

“…Combining of TiO 2 with Bi-based semiconductors is an effective strategy to improve the photocatalytic activity because the advantages of each component can be combined in composite photocatalysts . Bi-based oxides, such as Bi 2 MoO 6 , ,, BiVO 4 , − and Bi 2 WO 6 , ,, have attracted widespread attention as efficient photocatalysts due to their narrow band gaps and their inherent characteristics. , Among bismuth-containing oxides, Bi 2 MoO 6 has attracted considerable attention recently due to its narrow band gap (∼2.7 eV), − but there are some challenges to the development of pure Bi 2 MoO 6 as a photocatalyst due to high recombination rate of charge carriers . Many approaches like morphology control and coupling Bi 2 MoO 6 with other semiconductors to form a heterojunction have been applied to enhance the charge separation efficiency and increase the CO 2 adsorption capacity for the CO 2 photoreduction process .…”