| 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: | 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 Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 15/18733-0 - Upconverting Lanthanide Nanoparticles for Biosensing Applications |
| Grantee: | Chanchal Hazra |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| 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 Opportunities: | Scholarships in Brazil - Post-Doctoral |