Photocatalytic Removal of Organics over BiVO4-Based Photocatalysts

Abstract

Organic compounds, such as organic dyes and phenols, are the main pollutants in wastewater. In the past years, a large number of studies on the fabrication and photocatalytic organics degradation of BiVO 4 and its related materials have been reported in the literature. In this chapter, we shall focus on the advancements in the synthesis and photocatalytic applications of several kinds of BiVO 4-based photocatalysts: (i) well-defined morphological BiVO 4 photocatalysts, (ii) porous BiVO 4 photocatalysts, (iii) heteroatom-doped BiVO 4 photocatalysts, (iv) BiVO 4-based heterojunction photocatalysts, and (v) supported BiVO 4 photocatalysts. We shall discuss the structure-photocatalytic performance relationship of the materials and the involved photocatalytic degradation mechanisms. In addition, we also propose the research trends and technologies for practical applications of the BiVO 4-based photocatalytic materials.

Insight into Potassium Vanadates as Visible-Light-Driven Photocatalysts: Synthesis of V(IV)-Rich Nano/Microstructures for the Photodegradation of Methylene Blue

“…The conducted research is mainly devoted to the nanostructured vanadates, which can appear in various forms such as nanoparticles, , nanobelts, , or nanotubes . It is well known that the shape and size play a significant role, as broadly described in the literature. − The photocatalytic properties are also strongly dependent on the crystalline structure. Generally, the monoclinic scheelite BiVO 4 (m-BiVO 4 ) is considered to be more active than the other two tetragonal phases. − In addition, the face-dependent photocatalytic behavior was also shown with the beneficial effect of (040) facets on contaminant degradation. − Another critical factor in the photocatalytic reaction is crystal defects, for example, oxygen vacancies, which trap photogenerated pairs and reduce their recombination rate .…”

A comparative study of photocatalytically active nanocrystalline tetragonal zyrcon-type and monoclinic scheelite-type bismuth vanadate

“…Among non-titania (TiO2)-based visible-light driven photocatalysts, considerable research has been devoted to bismuth vanadate (BiVO4) [1][2][3][4]. Mainly, studies have focused on monoclinic BiVO4 and it has proved to be an excellent material for use (under visible-light illumination) in photocatalytic water splitting and photocatalytic degradation of organic compounds (air/water pollutants) [1][2][3][4][5][6][7].…”

“…It is well-known for ms-BiVO4 to exhibit excellent photocatalytic activity under visible light [1][2][3][4][5][6][7]. Compared with ms-BiVO4, ts-BiVO4 is much less studied and appears to display moderate photocatalytic ac-tivity [9] although first studies declared it to be a poor photocatalyst [10,12].…”

Construction of 1T-MoS2quantum dots-interspersed (Bi1−xFex)VO4heterostructures for electron transport and photocatalytic properties

“…Energy shortage and water pollution are major threats worldwide owing to limited fossil fuel resources and growing consumption. 1,2 Producing abundant and clean energy is the substantial solution to these two problems. 3 These problems are somewhat overcome by the advanced oxidation process (AOP) with the advancement of nanotechnology.…”