Enhanced UV-Visible Light Photocatalytic Activity by Constructing Appropriate Heterostructures between Mesopore TiO2 Nanospheres and Sn3O4 Nanoparticles

Abstract

Novel TiO2/Sn3O4 heterostructure photocatalysts were ingeniously synthesized via a scalable two-step method. The impressive photocatalytic abilities of the TiO2/Sn3O4 sphere nanocomposites were validated by the degradation test of methyl orange and •OH trapping photoluminescence experiments under ultraviolet (UV) and visible light irradiation, respectively. Especially under the visible light, the TiO2/Sn3O4 nanocomposites demonstrated a superb photocatalytic activity, with 81.2% of methyl orange (MO) decomposed at 30 min after irradiation, which greatly exceeded that of the P25 (13.4%), TiO2 (0.5%) and pure Sn3O4 (59.1%) nanostructures. This enhanced photocatalytic performance could be attributed to the mesopore induced by the monodispersed TiO2 cores that supply sufficient surface areas and accessibility to reactant molecules. This exquisite hetero-architecture facilitates extended UV-visible absorption and efficient photoexcited charge carrier separation.

Sol–gel auto combustion synthesis, characterization, and application of Tb2FeMnO6 nanostructures as an effective photocatalyst for the discoloration of organic dye contaminants in wastewater

“…Of course, it was predicted that due to the band-gap of about 3.3 eV calculated for S4, visible light with a wavelength of about 420 nm could not create electron–holes. 37 In the following, the photocatalysis process was performed to investigate the optimal sample (S4) photocatalytic activity under UV light. According to Fig.…”

Hydrogen peroxide modified and bismuth vanadate decorated titanium dioxide nanocomposite (BiVO4@HMT) for enhanced visible light photocatalytic growth inhibition of harmful cyanobacteria in water

“…The intensity of the predominant planes of BiVO 4 and HMT, such as (121) and (101), was reduced compared to the pristine samples. The ndings can be attributed to the lattice alteration caused by the 'interfacial strain' between the BiVO 4 and HMT powders 47…”

Efficient Photocatalytic Degradation of RhB by Constructing Sn3O4 Nanoflakes on Sulfur-Doped NaTaO3 Nanocubes

“…With a direct bandgap energy of around 2.56 eV, Sn 3 O 4 has also been widely studied for its relatively negative conduction band edge and moderate charge transport features. The proper energy band makes it a better material for constructing heterojunction catalysts with other semiconductor materials [32][33][34][35][36][37]. Hence, it is very vital to broaden the photocatalytic active spectral range and improve the separation of carriers of Sn 3 O 4 .…”