Obtenção, caracterização e estudo da nucleação de nanopartículas de Ag em AgX (X = Cl, Br, I)

• Grant number: 17/08596-0
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: June 01, 2017
• End date: May 31, 2018
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Elson Longo da Silva
• Grantee: Francisco Carlos Groppo Filho
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated research grant: 13/07296-2 - CDMF - Center for the Development of Functional Materials, AP.CEPID

Abstract

Silver halides (AgX, X = Cl, Br, and I), have attracted much interest because oftheir electronic, magnetic, optical, photocatalytic and bactericide properties. Recently,experimental and theoretical studies of silver-based materials report that modificationson the surfaces of materials with Ag metal nanoparticles (with excellent conductivityand strong capacity of trapping of electrons) could increase the rate of electron-holeseparation, making the AgXs promising materials for photocatalysis and antibacterialactivity, among other applications. Therefore, this essay aims to study and analyze thesynthesis of AgXs through the copreciptation method in aqueous media under differenttemperatures, in addition to monitoring the nucleation and formation of Ag on thesurface metal of the material. The characterization of the samples shall be made bymeans of x-ray diffractometry (XRD), absorption spectroscopy in the ultraviolet-visible(UV-Vis), Raman Spectroscopy, scanning electron microscopy (SEM) andphotoluminescence spectroscopy (PL).