Visible‐Light‐Induced Degradation of Methylene Blue by SrBi₃VO₈ Nanoparticles

Abstract

Nanosized particles of strontium bismuth vanadate SrBi3VO8 were prepared via the Pechini method on the base of citrate‐complexation route. The samples were characterized using X‐ray powder diffraction (XRD), scanning electron microscope (SEM), energy dispersive X‐ray spectra (EDX), X‐ray photoelectron spectroscopic (XPS), and UV–vis absorption spectrum. This bismuth‐containing vanadate presents an efficient absorption in the UV–visible light wavelength region with a narrow band‐gap energy of 2.36 eV and an indirect allowed electronic transition. It is well‐known that hybridization of the 6s and 6p orbitals of Bi3+ could result in lone electron pair and yield some very interesting properties. The photocatalytic activities of SrBi3VO8 nanoparticles were evaluated by the photodegradation of methylene blue (MB) under visible light irradiation in air atmosphere. These results indicate that SrBi3VO8 could be a potential photocatalyst driven by visible light. To understand the charge generation and separation process, the luminescence as well as the decay lifetimes was investigated in the same samples for photocatalysis.

Combustion Synthesis and Enhancement of BiOCl by Doping Eu3+ for Photodegradation of Organic Dye

“…Obviously, the peak intensity reaches maximum at x = 0.1 and then decreases with the increase of x value, indicating that the e − –h + recombination was effectively prohibited. This means that much more photon energy were utilized to degrade RhB rather than to emission light, which is facial for the better photodegradation performance …”

Facile Synthesis of BiOBr/Bi2Sn2O7 Heterojunction Photocatalysts with Improved Photocatalytic Activities

“…Environmental pollution problems facing the world today have attracted much attention and are getting worse . Since Fujishima demonstrated the photocatalysis with TiO 2 under UV‐light irradiation in 1970s, semiconductor‐based photocatalytic technique has been considered to be one of the reliable and ultimate solutions to dealing with global environmental pollution . TiO 2 is a famous semiconductor owning improved photocatalytic activities for the oxidative degradation of organic compounds .…”

“…[1][2][3] Since Fujishima demonstrated the photocatalysis with TiO 2 under UV-light irradiation in 1970s, semiconductor-based photocatalytic technique has been considered to be one of the reliable and ultimate solutions to dealing with global environmental pollution. [4][5][6] TiO 2 is a famous semiconductor owning improved photocatalytic activities for the oxidative degradation of organic compounds. 7,8 However, TiO 2 with band gap of 3.2 eV has poor nature solar efficiency and slow reaction rate, which hinders its further applications.…”

Synthesis, surface and optical properties of Ag2CaV4O12 nanoparticles for dye removal under visible irradiation

“…For example, there are efficient optical absorption centers of VO 4 3À in vanadates such as BiVO 4 [8], InVO 4 [9], SrBi 3 VO 8 [10], etc., where photoinduced electrons can be induced by electron transition from O2p to V3d orbitals [11]. By taking into account of cations in semiconductors, Ag-containing oxides semiconductors have been extensively studied because of their efficient photocatalytic properties.…”