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Dive into the research topics where Paulo C. de Sousa Filho is active.

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Featured researches published by Paulo C. de Sousa Filho.


Journal of Fluorescence | 2008

Tripolyphosphate as precursor for REPO(4):Eu (3+) (RE = Y, La, Gd) by a polymeric method.

Paulo C. de Sousa Filho; Osvaldo A. Serra

A modification of the Pechini method was applied to obtain luminescent rare earth orthophosphates. The developed synthetic route is based on the ability of the tripolyphosphate anion (


Journal of the Brazilian Chemical Society | 2015

From Lighting to Photoprotection: Fundamentals and Applications of Rare Earth Materials

Paulo C. de Sousa Filho; Juliana F. Lima; Osvaldo A. Serra


Journal of Fluorescence | 2011

Synthesis and Study of the Photophysical Properties of a New Eu3+ Complex with 3-Hydroxypicolinamide

Ieda L. V. Rosa; Paulo C. de Sousa Filho; Cláudio R. Neri; Osvaldo A. Serra; Alberthmeiry Teixeira de Figueiredo; José Arana Varela; Elson Longo

{text{P}}_3 {text{O}}_{10}^{5 - }


Química Nova | 2014

Terras raras no Brasil: histórico, produção e perspectivas

Paulo C. de Sousa Filho; Osvaldo A. Serra


ACS Applied Materials & Interfaces | 2017

Lanthanoid-Doped Phosphate/Vanadate Mixed Hollow Particles as Ratiometric Luminescent Sensors

Paulo C. de Sousa Filho; Eric Larquet; Diana Dragoe; Osvaldo A. Serra; Thierry Gacoin

) to act both as a complexing agent and as an orthophosphate precursor. Heating of aqueous solutions containing RE3+, Eu3+,


Química Nova | 2011

DIESEL/BIODIESEL SOOT OXIDATION WITH CeO2 AND CeO2-ZrO2-MODIFIED CORDIERITES: A FACILE WAY OF ACCOUNTING FOR THEIR CATALYTIC ABILITY IN FUEL COMBUSTION PROCESSES

Rodrigo Ferreira Silva; Edimar DeOliveira; Paulo C. de Sousa Filho; Cláudio R. Neri; Osvaldo A. Serra


Química Nova | 2015

METODOLOGIAS DE SÍNTESE EM FASE LÍQUIDA PARA A OBTENÇÃO DE NANOMATERIAIS INORGÂNICOS À BASE DE TERRAS RARAS

Paulo C. de Sousa Filho; Osvaldo A. Serra

{text{P}}_3 {text{O}}_{10}^{5 - }


Journal of the Brazilian Chemical Society | 2015

Kinetic Parameters of Soot Oxidation Catalyzed by Nanosized ZnO-CeO 2 Solids

Leandro Fontanetti Nascimento; Paulo C. de Sousa Filho; Juliana F. Lima; Osvaldo A. Serra


Química Nova | 2010

Estudos fotoluminescentes em compostos de íons terras raras coordenados por um derivado carbazólico

Renata Figueredo Martins; Cláudio R. Neri; Paulo C. de Sousa Filho; Osvaldo A. Serra; Kleber T. de Oliveira

, citric acid, and ethylene glycol led to polymeric resins. The ignition of these resins at different temperatures yielded luminescent orthophosphates. The produced nanosized phosphors (YPO4:Eu3+, (Y,Gd)PO4:Eu3+, and LaPO4:Eu3+) were analyzed by infrared and luminescence spectroscopies, X-ray diffractometry, and scanning electron microscopy.


Revista Virtual de Química | 2015

The Light and the Rare Earths

Osvaldo A. Serra; Juliana Fonseca de Lima; Paulo C. de Sousa Filho

Light and rare earths (RE) have a long lived relationship that dates from the discoveries of these elements in the nineteenth century. Since then, the increasing comprehension of their spectroscopic properties conducted to a wide and alluring literature about light absorption and emission by this particular and fascinating group. For more than 50 years, RE-containing solid-state optical materials have undoubtfully been an important subject for the development of more efficient lighting, visualization, communication and health everyday applications. Therefore, this review introduces the spectroscopic properties of rare earth materials and their applications, with a brief discussion of the main mechanisms of light absorption and emission from a 4f elements inorganic physical chemistry perspective. Special attention is devoted to the use of these elements in systems concerning photoprotection and to the fundamentals of visible light generation for lighting and visualization.

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