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Multi material exploitation in manufacturing photocatalytic semiconductor glass fibers for pollution suppression

Grant number: 17/16826-6
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): January 01, 2018
Effective date (End): December 31, 2020
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
Principal Investigator:Younes Messaddeq
Grantee:Joy Sankar Roy
Home Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
Associated research grant:15/22828-6 - Pushing the boundaries of optical fibers: from photonics to optogenetics and environmental monitoring, AP.SPEC
Associated scholarship(s):19/12212-9 - Fabrication of an optical fiber monolithic reactor for photocatalytic wastewater treatment, BE.EP.PD

Abstract

During this project, significant research efforts will be devoted to the development and characterization of novel semiconducting metal-oxide glasses with bandgap energies in the range of 2.8 to 3.4 eV, and to the process development of multi-material glass fiber composites. This development will be achieved through new materials, particularly WO3-containing, Sb2O3-containing, and ZnO containing glass compounds, and careful design to impart fiber UV-guiding and electrical-bias functionalities. The key to achieving the multi-material approach in making semiconducting photocatalytic glass fibers is to select glass compounds exhibiting the same viscosity, thermal expansion and surface energy to form intimate and durable interfaces during fiber drawing process. With these guidelines, UV-guiding, electrical-bias, and catalytic functionalities could be integrated into a same fiber by combining at least three different, but thermodynamically compatible, material compounds into the same fiber. For instance, the catalytic functionalities of the fibers can be enabled with a semiconducting WO3-Sb2O3-ZnO -containing glass compound exhibiting an electronic bandgap energy of Eg > 2.8 eV matching the oxidation potential of HO*. Fiber photocatalytic testing will be implemented using a wide variety of UV light sources, including 355 nm tripled Nd:YAG lasers, UV LEDs, and concentrated solar light, through the utilization of facilities and equipment available at UNESP. The UV-guiding semiconducting glass fibers will be immersed into tainted waste waters (such as solvent containing waters) and the efficiency of photocatalytic effect will be tested against classical Fenton photocatalysis process benchmarks.

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)
ROY, JOY SANKAR; DUGAS, GABRIEL; MORENCY, STEEVE; MESSADDEQ, YOUNES. Rapid degradation of Rhodamine B using enhanced photocatalytic activity of MoS2 nanoflowers under concentrated sunlight irradiation. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, v. 120, JUN 2020. Web of Science Citations: 0.
ROY, JOY SANKAR; DUGAS, GABRIEL; MORENCY, STEEVE; RIBEIRO, SIDNEY J. L.; MESSADDEQ, YOUNES. Enhanced photocatalytic activity of silver vanadate nanobelts in concentrated sunlight delivered through optical fiber bundle coupled with solar concentrator. SN APPLIED SCIENCES, v. 2, n. 2 FEB 2020. Web of Science Citations: 0.
ROY, JOY SANKAR; MESSADDEQ, YOUNES; RIBEIRO, SIDNEY J. L. Formation and optical properties of new glasses within Sb2O3-WO3-ZnO ternary system. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, v. 30, n. 18, SI, p. 16798-16805, SEP 2019. Web of Science Citations: 0.

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