Plasmon-enhancement on bismuth vanadate nanostructures decorated with metal nanoparticles

• Grant number: 16/01020-3
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: July 01, 2016
• End date: January 08, 2017
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
• Principal Investigator: Paola Corio
• Grantee: Juliana dos Santos de Souza Silva
• Host Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

Bismuth vanadate (BiVO4) 1D nanostructures represent a class of materials with high sensibility toward visible radiation, in addition to unique physical-chemical properties that allow their application in photochemistry and photoelectrochemistry. These nanostructures can be prepared through several techniques, being the microwave-assisted hydrothermal synthesis a new and promising approach. We propose the optimization of the synthetic conditions by varying parameter such as solvent, temperature, microwave-power, among others, as well as their influence over the morphology of the obtained nanostructures. We also propose the study of plasmon-intesification caused by the integration of metal nanoparticles, as Au and Ag, to the BiVO4 nanostructures. We expect, therefore, an increasing in the photocatalytic and photoelectrocatalytic efficiency of the resultant materials. The plasmon-enhancement will be evaluated through SERS technique (Surface enhanced Ramna spectroscopy), which is one of the main tolls utilized by the group where the proposal will be developed. The photocatalytic activity will be analyzed by the degradation of a model dye, while the photoelectrocatalytic activity will be studied using new multihierarchical films as working electrodes. These multihierarchical electrodes will be prepared by decorating vertically aligned zinc oxide nanorods (ZNONR) with the BiVO4 nanostructures integrated to metal nanoparticles. In a second approach, anodized TiO2 nanotubes films will be employed as templates for growing the BiVO4 nanotubes. Structural and morphological characterizations are going to be made through a broad set of techniques that comprise of the candidate's competence and are available at IQUSP.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SOUZA, JULIANA S.; HIRATA, FERNANDO T. H.; CORIO, PAOLA. Microwave-assisted synthesis of bismuth vanadate nanoflowers decorated with gold nanoparticles with enhanced photocatalytic activity. JOURNAL OF NANOPARTICLE RESEARCH, v. 21, n. 2, FEB 10 2019. (16/01020-3, 16/21070-5, 17/12688-8, 17/11395-7)