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TiO2-PILLARED LAYERED SOLIDS DOPED WITH NANOPARTICLES FOR CARBON DIOXIDE PHOTOREDUCTION AND WATER SPLITTING

Grant number: 13/05654-9
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): June 01, 2013
Effective date (End): May 31, 2016
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
Principal Investigator:Ana Flávia Nogueira
Grantee:Mauricio Alves de Melo Junior
Home Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated scholarship(s):14/22388-3 - Optimizing photochemical charge separation at nanoscale interfaces as a way to improve the solar energy to fuel conversion efficiency of water splitting photocatalysts, BE.EP.PD

Abstract

The development of novel Ti and Nb-based semiconductors to be applied as photocatalysts for the production of the solar fuels methane and hydrogen from CO2 photoreduction and water splitting, respectively, is proposed in this research project.Lamellar potassium titanate (K2Ti4O9) and potassium niobate (K4Nb6O17) will be the precursor materials employed in the syntheses of the new photocatalysts. Despite the wide chemical and structural versatilities of layered materials, which make them suitable for several applications, they have not been extensively explored in photocatalytic processes so far.Their expansible features will be exploited for the introduction of titanium dioxide (TiO2) pillars in the interlamellar spaces, creating new photoactive sites as well as increasing the surface area for the enhancement of the materials photocatalytic activities. Due to the relative high band gap energy of TiO2 pillars (3.2 eV), which hinders the absorption of visible radiation, the pillared solids will also be doped with nanoparticles of cadmium sulfide, copper oxide or platinum, for absorption of a wider range of the solar spectrum. The new photocatalysts will be tested on CO2 photoreduction for methane generation and water splitting for hydrogen gas production in a reactor developed at our laboratory and the amount of generated products will be detected by gas chromatography.

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)
MELO, JR., MAURICIO A.; CARMINATI, SAULO A.; BETTINI, JEFFERSON; NOGUEIRA, ANA F. Pillaring and NiOx co-catalyst loading as alternatives for the photoactivity enhancement of K2Ti4O9 towards water splitting. SUSTAINABLE ENERGY & FUELS, v. 2, n. 5, p. 958-967, MAY 2018. Web of Science Citations: 2.
MELO JUNIOR, MAURICIO ALVES; MORAIS, ANDREIA; NOGUEIRA, ANA F. Boosting the solar-light-driven methanol production through CO2 photoreduction by loading Cu2O on TiO2-pillared K2Ti4O9. Microporous and Mesoporous Materials, v. 234, p. 1-11, NOV 1 2016. Web of Science Citations: 6.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.