Advanced search
Start date
Betweenand
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Broad spectrum photocatalytic system based on BiVO4 and NaYbF4:Tm3+ upconversion particles for environmental remediation under UV-vis-NIR illumination

Full text
Author(s):
Ullah, S. [1, 2] ; Ferreira-Neto, E. P. [1] ; Hazra, C. [1] ; Parveen, R. [3] ; Rojas-Mantilla, H. D. [1] ; Calegaro, M. L. [3] ; Serge-Correales, Y. E. [1] ; Rodrigues-Filho, U. P. [3] ; Ribeiro, S. J. L. [1]
Total Authors: 9
Affiliation:
[1] Sao Paulo State Univ UNESP, Inst Chem, POB 355, BR-14801970 Araraquara, SP - Brazil
[2] Univ Peshawar, Inst Chem Sci, POB 25120, Peshawar - Pakistan
[3] Univ Sao Paulo, Inst Chem Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: APPLIED CATALYSIS B-ENVIRONMENTAL; v. 243, p. 121-135, APR 2019.
Web of Science Citations: 12
Abstract

The development of photocatalysts responsive towards a broader region of the solar (UV-to-NIR) light is important for efficient harvesting of sunlight for photochemical and photoelectrical applications. In this study, two photocatalytic systems (BV/LEDs and BV/UCPs where UCPs stands for NaYbF4:Tm3+ upconversion particles) based on bismuth vanadate (BV) are introduced for photocatalytic degradation of both organic dyes (crystal violet, CV) and pharmaceuticals (sulfathiazole, STZ) under a variety of photoactivation modes including low-power (1.26 W) LEDs and near infrared (NIR) irradiation as well as natural sunlight. The BV/LEDs system makes use of the perfect match between the emission profile of commercial blue LEDs (460 +/- 10 nm) and absorption profile of BV (E-g = 2.6 eV) to effectively photodegrade pollutants. The BV/UCPs system, on the other hand, exploits the NIR-to-UV/visible upconverted light from UCPs to allow photodegradation of pollutants under NIR illumination. Moreover, we present a detailed study of the experimental parameters to obtain BV particles with tailored morphology (spherical, rod-like, hyperbranched), crystalline phase (monoclinic, tetragonal or heterojunction biphasic BV) and band gap energy (2.4-2.9 eV). Depending on the phase composition, a synergetic effect in photoactivity is observed in samples containing around 68% monoclinic and 30% tetragonal BV which is ascribed to the formation of monoclinic/tetragonal heterojunction. (AU)

FAPESP's process: 15/22875-4 - Development of Efficient IR/Visible light-driven Photocatalysts for Photocatalytic Applications under Solar light radiation
Grantee:Sajjad Ullah
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 18/01934-0 - Aerogels based on transition metal disulfides and bacterial cellulose: bifunctional nanomaterials with photocatalytic and adsorptive properties for environmental applications
Grantee:Elias Paiva Ferreira Neto
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 15/18733-0 - Upconverting Lanthanide Nanoparticles for Biosensing Applications
Grantee:Chanchal Hazra
Support type: Scholarships in Brazil - Post-Doctorate