Development of low-cost national technology for enzymatic production of biodiesel:...
| Full text | |
| Author(s): |
Lima Perini, Joao Angelo
[1, 2]
;
Moura Torquato, Lilian D.
[1, 2]
;
Irikura, Kallyni
[1, 2]
;
Boldrin Zanoni, Maria Valnice
[1, 2]
Total Authors: 4
|
| Affiliation: | [1] Sao Paulo State Univ UNESP, Inst Chem, Araraquara, SP - Brazil
[2] Sao Paulo State Univ UNESP, Inst Chem, Natl Inst Alternat Technol Detect, Toxicol Evaluat & Removal Micropollutants & Radio, Araraquara, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | JOURNAL OF CO2 UTILIZATION; v. 34, p. 596-605, DEC 2019. |
| Web of Science Citations: | 1 |
| Abstract | |
TiO2 nanotube (NT) arrays were modified with thin films of polydopamine (PDA) and Ag nanoparticles (NP) and were used as electron storage centers on a photoelectrode surface, in order to drive the reduction of CO2 to methanol. Silver nanoparticles were obtained by means of chemical deposition using the catechol groups present in PDA. The Ti/TiO2NT@PDA-AgNP photocathode presented higher photocurrents when irradiated using either UV-vis irradiation or a solar simulator, compared to bare Ti/TiO2NT, indicating improvement of charge carrier separation, while the band gap of the material decreased from 3.12 to 2.3 eV. Under optimized conditions, methanol production of 59.5 mu M cm(-2) was achieved and under the solar simulator, 19.25 mu M cm(-2) of methanol was generated, indicating that the PDA-AgNP coating improved the activation by visible light. The Ag present in the modified Ti/TiO2NT electrodes was quantified during photoelectrocatalysis, with the amount of Ag nanoparticles released from the electrodes being negligible. A schematic representation of the charge transfer mechanism at the Ti/TiO2NT@PDA-AgNP electrode is provided. (AU) | |
| FAPESP's process: | 17/12790-7 - Preparation and characterization of TiO2 nanostructured electrodes modified with Metal Organic Frameworks (MOFs) for application in the preconcentration and reduction of CO2 |
| Grantee: | Kallyni Irikura |
| Support type: | Scholarships in Brazil - Post-Doctorate |
| FAPESP's process: | 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies |
| Grantee: | Maria Valnice Boldrin |
| Support type: | Research Projects - Thematic Grants |
| FAPESP's process: | 16/18057-7 - CO2 reduction aiming to generate value-added compounds by photocatalysis/photoelectrocatalysis using ionic liquid in a pressurized reactor |
| Grantee: | João Angelo de Lima Perini |
| Support type: | Scholarships in Brazil - Post-Doctorate |