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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Microwave-assisted synthesis of bismuth vanadate nanoflowers decorated with gold nanoparticles with enhanced photocatalytic activity

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Author(s):
Souza, Juliana S. [1] ; Hirata, Fernando T. H. [2] ; Corio, Paola [2]
Total Authors: 3
Affiliation:
[1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210580 Santo Andre, SP - Brazil
[2] Univ Sao Paulo, Inst Quim, CP 26077, BR-05513970 Sao Paulo, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF NANOPARTICLE RESEARCH; v. 21, n. 2 FEB 10 2019.
Web of Science Citations: 1
Abstract

We describe the synthesis of bismuth vanadate nanoflowers decorated with Au nanoparticles (Au-BiVO4NF) using conventional oil bath or microwave irradiation as a heating source, where de AuNPs exhibit sizes of 29 +/- 10nm and 50 +/- 11nm. We show how microwaves can be used to replace well-stablished methods in the synthesis of inorganic nanomaterials and drastically reduce both time and energy consumptions. The Au-BiVO4NF obtained under microwave irradiation exhibited the same physical-chemical properties of those prepared through conventional heating; however, time lapse for synthetizing the heterojunction decreased from 4h to only 10min. The heterojunction is a very promising photocatalyst under visible light irradiation since BiVO4 exhibits low band-gap energy and Au nanoparticles can behave as electron sinks and/or as electron sources through plasmon resonance, increasing charge separation of photogenerated electrons and holes. This synergic effect resulted in a heterojunction able to degrade similar to 95% of methylene blue after 6h of UV-visible light irradiation. (AU)

FAPESP's process: 16/21070-5 - Vibrational spectroscopy with spatial resolution
Grantee:Mauro Carlos Costa Ribeiro
Support type: Research Projects - Thematic Grants
FAPESP's process: 17/11395-7 - Microwave-assisted synthesis of metal oxides semiconductors heterojunctions with photocatalytic applications
Grantee:Juliana dos Santos de Souza
Support type: Regular Research Grants
FAPESP's process: 16/01020-3 - Plasmon-enhancement on bismuth vanadate nanostructures decorated with metal nanoparticles
Grantee:Juliana dos Santos de Souza
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 17/12688-8 - Development of multi-hierarchic electrodes based on Au-BiVO¬4 and ZnO for photoelectrochemical water splitting
Grantee:Fernando Takashi Harada Hirata
Support type: Scholarships in Brazil - Scientific Initiation