Preparation of Ag3PO4/TiO2(B) Heterojunction Nanobelt with Extended Light Response and Enhanced Photocatalytic Performance

Abstract

Photocatalytic degradation, as an emerging method to control environmental pollution, is considered one of the most promising environmental purification technologies. As Tibet is a region with some of the strongest solar radiation in China and even in the world, it is extremely rich in solar energy resources, which is ideal for applying photocatalytic technology to its ecological environment protection and governance. In this study, Na2Ti3O7 nanobelts were prepared via a hydrothermal method and converted to TiO2∙xH2O ion exchange, which was followed by high-temperature calcination to prepare TiO2(B) nanobelts (“B” in TiO2(B) means “Bronze phase”). A simple in situ method was used to generate Ag3PO4 particles on the surface of the TiO2 nanobelts to construct a Ag3PO4/TiO2(B) heterojunction composite photocatalyst. By generating Ag3PO4 nanoparticles on the surface of the TiO2(B) nanobelts to construct heterojunctions, the light absorption range of the photocatalyst was successfully extended from UV (ultraviolet) to the visible region. Furthermore, the recombination of photogenerated electron–hole pairs in the catalyst was inhibited by the construction of the heterojunctions, thus greatly enhancing its light quantum efficiency. Therefore, the prepared Ag3PO4/TiO2(B) heterojunction composite photocatalyst greatly outperformed the TiO2(B) nanobelt in terms of photocatalytic degradation.

Enhanced Photocatalytic Activities of Ag2WO4 Modified Ag6Si2O7 through a Comprehensive p-n Heterojunction S-Scheme Process

“…Silver-based semiconductor materials have received significant attention for photocatalysis applications owing to their excellent bandgap and structural stability [11][12][13]. For instance, AgX-based (Cl, Br, and I) [14][15][16][17][18][19][20] semiconductors exhibit notable visible-sunlight harvesting and could be used to remove organic contaminants from water systems. Silver tungstate (Ag 2 WO 4 ) has also been extensively explored as a semiconductor photocatalyst for the decontamination of organic pollutants [21,22].…”

Facile green synthesis of a dahlia-like anatase/TiO2(B) phase junction for boosting the photocatalytic degradation of persistent tetracycline

“…Among these polymorphs, anatase usually possesses higher photocatalytic activity and TiO 2 (B) more easily forms hierarchical porous architectures originating from its unique layered structure with intrinsic open tunnels, 12,13 which provides a good opportunity for the design and construction of an anatase/TiO 2 (B) phase junction with larger specific surface area. Unfortunately, TiO 2 (B), as a metastable polymorph, has been rarely studied due to its difficult preparation, 14,15 which is not conducive to the development of TiO 2 (B)-based phase junctions. Besides, the existing synthesis strategies toward the TiO 2 (B)/anatase phase junction usually depend on high-temperature calcination, strong acids, strong alkalis and complex steps.…”

Integrating Full-Length Transcriptome and RNA Sequencing of Siberian Wildrye (Elymus sibiricus) to Reveal Molecular Mechanisms in Response to Drought Stress

“…Drought is a widespread climatic phenomenon that has a profound effect on how plants grow and develop and can significantly affect agricultural production and ecosystems [ 1 ]. As the third pole of the earth, the drought-stricken areas of the Qinghai–Tibet Plateau (QTP) account for 63% of the total area of agricultural and grazing land [ 2 ], and this problem will likely worsen with global climate change and human activities such as mining that weaken the plateau ecosystem and erode the ecological safety barrier functions of the QTP [ 3 ]. The development of germplasm adapted to arid regions on the QTP is essential for the preservation of the ecological functions of this area and for the development of stable livestock production.…”