In:
Environmental Science: Nano, Royal Society of Chemistry (RSC), Vol. 8, No. 12 ( 2021), p. 3855-3864
Abstract:
Photocatalysis is considered to be an effective and sustainable way to purify a variety of refractory pollutants. However, the construction of a versatile efficient photocatalyst is still an arduous challenge. Herein, a series of mesoporous TiO 2 -doped with polyoxometalates [PMo 10 V 2 O 40 ] 5− (PMV) and loaded with Ag nanoparticle composite photocatalysts PMV-TiO 2 /Ag x ( x represented the mass of AgNO 3 ) are presented. In this composite, polyoxoanions PMV are uniformly dispersed in mesoporous TiO 2 , which not only acts as a dopant to effectively expand the visible light absorption of TiO 2 but also acts as a component to form the S-scheme heterojunction with modified TiO 2 to promote the separation of the photogenerated carrier. Furthermore, the Schottky junction between Ag nanoparticles and PMV-doped TiO 2 further enhances its carrier separation. The synergistic effect of the above factors endows PMV-TiO 2 /Ag x with excellent photocatalytic activity. PMV-TiO 2 /Ag 0.1 can completely degrade 10 ppm of 2,4-dichlorophenol in 180 minutes ( λ ≥ 420 nm), which is about 8.3 times higher than that of traditional TiO 2 . In addition, PMV-TiO 2 /Ag 0.1 also exhibits ultrahigh photocatalytic performance and durability for the photocatalytic removal of 2,4-difluorophenol, 2,4-dibromophenol, hexafluorobisphenol A, tetracycline, K 2 Cr 2 O 7 , methyl orange, which is an excellent photocatalyst with high efficiency and universal application.
Type of Medium:
Online Resource
ISSN:
2051-8153
,
2051-8161
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2021
detail.hit.zdb_id:
2758235-8
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