Back to Search
Start Over
Photoelectrocatalytic Degradation of Paraquat by Pt Loaded TiO2 Nanotubes on Ti Anodes
- Source :
- Materials, Volume 11, Issue 9, Materials, Vol 11, Iss 9, p 1715 (2018)
- Publication Year :
- 2018
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2018.
-
Abstract
- Nanotube structured TiO2 on Ti surface were prepared in ethylene glycol (Ti/TiO2NTEG) medium by anodic oxidation method with different times and then the plates were calcinated at different temperatures. Non-nanotube structured Ti/TiO2, prepared by thermal oxidation method, and nanotube structured TiO2 on Ti plate in hydrogen fluoride solution were also prepared for comparison. Pt loaded Ti/TiO2NTEG photoanodes were also prepared by cyclic voltammetry method with different cycles and the optimum loaded Pt amount was determined. Photoanodes were characterized by using X-ray Diffraction (XRD), Scanning Electron Microscopy-Energy-Dispersive X-ray Analysis (SEM-EDX), and photocurrent methods. XRD analyses proved that almost all TiO2 is in anatase phase. SEM analyses show that nanotubes and Pt nanoparticles on nanotube surface are dispersed quite homogeneously. The longest nanotubes were obtained in the ethylene glycol medium and the nanotube length increased by increasing applied anodic oxidation time. In addition, a linear correlation between nanotube length and XRD peak intensity was found. Moreover, SEM-EDX and XRD analyses evidence that Pt nanoparticles on nanotube surface are metallic and in cubic structure. Photoelectrocatalytic degradation of paraquat was performed using the prepared photoanodes. Moreover, electrocatalytic and photocatalytic degradations of paraquat were also investigated for comparison, however lower activities were observed. These results evidence that the photoanodes show a significant synergy for photoelectrocatalytic activity.
- Subjects :
- Pt loaded TiO2
Anatase
Nanotube
Materials science
Scanning electron microscope
paraquat
02 engineering and technology
010402 general chemistry
01 natural sciences
lcsh:Technology
TiO2 nanotube
chemistry.chemical_compound
General Materials Science
lcsh:Microscopy
lcsh:QC120-168.85
degradation
Photocurrent
Thermal oxidation
lcsh:QH201-278.5
lcsh:T
polar herbicide
021001 nanoscience & nanotechnology
0104 chemical sciences
chemistry
Chemical engineering
lcsh:TA1-2040
photoelectrocatalysis
Photocatalysis
lcsh:Descriptive and experimental mechanics
lcsh:Electrical engineering. Electronics. Nuclear engineering
Cyclic voltammetry
0210 nano-technology
lcsh:Engineering (General). Civil engineering (General)
Ethylene glycol
lcsh:TK1-9971
Subjects
Details
- Language :
- English
- ISSN :
- 19961944
- Database :
- OpenAIRE
- Journal :
- Materials
- Accession number :
- edsair.doi.dedup.....ed1ee92f0c02df51051bfe651066a64d
- Full Text :
- https://doi.org/10.3390/ma11091715