Advances in Bi2WO6-Based Photocatalysts for Degradation of Organic Pollutants

Abstract

With the rapid development of modern industries, water pollution has become an urgent problem that endangers the health of human and wild animals. The photocatalysis technique is considered an environmentally friendly strategy for removing organic pollutants in wastewater. As an important member of Bi-series semiconductors, Bi2WO6 is widely used for fabricating high-performance photocatalysts. In this review, the recent advances of Bi2WO6-based photocatalysts are summarized. First, the controllable synthesis, surface modification and heteroatom doping of Bi2WO6 are introduced. In the respect of Bi2WO6-based composites, existing Bi2WO6-containing binary composites are classified into six types, including Bi2WO6/carbon or MOF composite, Bi2WO6/g-C3N4 composite, Bi2WO6/metal oxides composite, Bi2WO6/metal sulfides composite, Bi2WO6/Bi-series composite, and Bi2WO6/metal tungstates composite. Bi2WO6-based ternary composites are classified into four types, including Bi2WO6/g-C3N4/X, Bi2WO6/carbon/X, Bi2WO6/Au or Ag-based materials/X, and Bi2WO6/Bi-series semiconductors/X. The design, microstructure, and photocatalytic performance of Bi2WO6-based binary and ternary composites are highlighted. Finally, aimed at the existing problems in Bi2WO6-based photocatalysts, some solutions and promising research trends are proposed that would provide theoretical and practical guidelines for developing high-performance Bi2WO6-based photocatalysts.

Advances in the optical and electronic properties and applications of bismuth-based semiconductor materials

“…3(g)), strong visible light harvesting ability, non-toxicity, and high chemical stability. 116,117 Its crystal structure belongs to the orthorhombic space group Pca2(1) 17 and is formed by the superposition of [Bi 2 O 2 ] 2+ and [WO 4 ] 2À layers, 118,119 as depicted in Fig. 2(g).…”

Review On Strategies For the Design and Synthesis of Flower‐Like Bi2WO6 and BiOX (X=F, Cl, Br, I) Composites for Photocatalytic Environmental Remediation

“…The advancement in industries and urbanization leads to the hasty evolution of the human and society but at the same time some of the environmental issues arise such as the air pollution, soil erosion, global warming and mainly water pollution. Hence it is essential for the waste water management and treatment by environmental remediation [1] . In order to address this issue, the investigators have taken it into consideration for the ecofriendly alternatives to utilize the inorganic and organic semiconductor as a photocatalyst which offers the green synthetic route for the energy saving technologies [2–6] .…”

“…Hence it is essential for the waste water management and treatment by environmental remediation. [1] In order to address this issue, the investigators have taken it into consideration for the ecofriendly alternatives to utilize the inorganic and organic semiconductor as a photocatalyst which offers the green synthetic route for the energy saving technologies. [2][3][4][5][6] Photo-generated electrons and holes emanate from semiconductors and participate in oxidation and reduction, respectively on irradiation of light.…”

“…It also delays the recombination of holes and electron and efficacy of the photocatalyst increases to greater extent. [1] Furthermore, due to the benefits of structured frameworks, conductive properties, large surface area, and pore volume, the doping of heteroatom (N, S, B, P, and F) has been shown to be excellent photocatalytic materials. [72] In this review, we have discussed some important binary and ternary composites of the Bi 2 WO 6 , BiOX (X = F, Cl, Br and I) and some other Bi-based inorganic semiconductors and their photocatalytic applications to undermine the organic pollutants such as a dyes and drugs.…”

Effective Removal of Sulfonamides Using Recyclable MXene-Decorated Bismuth Ferrite Nanocomposites Prepared via Hydrothermal Method

“…For example, the presence of organic pollutants in the aquatic environment, such as personal-care products, pharmaceuticals, steroid hormones, industrial chemicals, and pesticides, has caused great concern. It is known that sewage treatment plants, hospitals, and medical wastewater produce organic pollutants in aquatic environments when they are not properly treated [ 1 , 2 , 3 , 4 ]. Due to their toxicity to water ecosystems and human health, the presence of these pollutants in wastewater is considered an environmental threat [ 5 ].…”