Advanced search
Start date
Betweenand
Related content
(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

Full text
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