Preparation and characterization of Bi12TiO20/RGO as high-efficiency photocatalysts for degradation of dye wastewater

Bi12TiO20/reduced graphene oxide (RGO) composites were successfully synthesized by combining sol-gel method with hydrothermal treatment. The TEM showed that Bi12TiO20 nanoparticles are well dispersed on the surface of graphene. The photocatalytic performance of Bi12TiO20/RGO composites was evaluated...

Full description

Saved in:
Bibliographic Details
Published in:Diamond and related materials 2022-03, Vol.123, p.108890, Article 108890
Main Authors: Luo, Jing, Li, Wenguang, Ye, Jingrui, Zhao, Yitao, He, Guangyu, Chen, Haiqun
Format: Article
Language:English
Subjects:
Bi12TiO20
Bismuth titanate
Charge transfer
Composite materials
Free radicals
Graphene
Graphene-based photocatalysts
Hydrothermal treatment
Nanoparticles
Photocatalysis
Photodegradation
RhB
Rhodamine
Scavenging
Sol-gel method
Sol-gel processes
Wastewater
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Bi12TiO20/reduced graphene oxide (RGO) composites were successfully synthesized by combining sol-gel method with hydrothermal treatment. The TEM showed that Bi12TiO20 nanoparticles are well dispersed on the surface of graphene. The photocatalytic performance of Bi12TiO20/RGO composites was evaluated by degrading Rhodamine B (RhB) to innocuous substance under the visible light. The degradation rate of RhB over Bi12TiO20/RGO3 composites can reach 98%, which is much higher than Bi12TiO20. The introduction of graphene enhances the charge transfer ability and effectively inhibits the recombination of photogenerated electrons and holes. Bi12TiO20/RGO composites exhibit good stability in cycling experiments. The ∙OH and h+ generated in the Bi12TiO20/RGO-photocatalyzed RhB degradation system are identified as active species by free radical and hole scavenging experiments and the photocatalytic degradation mechanism is proposed. [Display omitted] •Bi12TiO20/RGO3 composites successfully synthesized by combining sol-gel method with hydrothermal treatment.•The existence of Ti4+ species and oxygen defects improved the migration rate of photogenerated carries.•The introduction of graphene optimized the morphology of Bi12TiO20 and improved the photocatalytic properties of Bi12TiO20.•The possible photocatalytic mechanism of Bi12TiO20/RGO3 was studied.
ISSN:0925-9635
1879-0062
DOI:10.1016/j.diamond.2022.108890