Photoelectrocatalytic Degradation of Paraquat by Pt Loaded TiO2 Nanotubes on Ti Anodes
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 T...
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doaj-81bd3dff40b4447c8cad9a8227f22bfa2020-11-24T23:42:46ZengMDPI AGMaterials1996-19442018-09-01119171510.3390/ma11091715ma11091715Photoelectrocatalytic Degradation of Paraquat by Pt Loaded TiO2 Nanotubes on Ti AnodesLevent Özcan0Turan Mutlu1Sedat Yurdakal2Biyomedikal Mühendisliği Bölümü, Mühendislik Fakültesi, Afyon Kocatepe Üniversitesi, Ahmet Necdet Sezer Kampüsü, 03200 Afyonkarahisar, TurkeyKimya Bölümü, Fen-Edebiyat Fakültesi, Afyon Kocatepe Üniversitesi, Ahmet Necdet Sezer Kampüsü, 03200 Afyonkarahisar, TurkeyKimya Bölümü, Fen-Edebiyat Fakültesi, Afyon Kocatepe Üniversitesi, Ahmet Necdet Sezer Kampüsü, 03200 Afyonkarahisar, TurkeyNanotube 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.http://www.mdpi.com/1996-1944/11/9/1715photoelectrocatalysisTiO2 nanotubePt loaded TiO2paraquatpolar herbicidedegradation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Levent Özcan Turan Mutlu Sedat Yurdakal |
spellingShingle |
Levent Özcan Turan Mutlu Sedat Yurdakal Photoelectrocatalytic Degradation of Paraquat by Pt Loaded TiO2 Nanotubes on Ti Anodes Materials photoelectrocatalysis TiO2 nanotube Pt loaded TiO2 paraquat polar herbicide degradation |
author_facet |
Levent Özcan Turan Mutlu Sedat Yurdakal |
author_sort |
Levent Özcan |
title |
Photoelectrocatalytic Degradation of Paraquat by Pt Loaded TiO2 Nanotubes on Ti Anodes |
title_short |
Photoelectrocatalytic Degradation of Paraquat by Pt Loaded TiO2 Nanotubes on Ti Anodes |
title_full |
Photoelectrocatalytic Degradation of Paraquat by Pt Loaded TiO2 Nanotubes on Ti Anodes |
title_fullStr |
Photoelectrocatalytic Degradation of Paraquat by Pt Loaded TiO2 Nanotubes on Ti Anodes |
title_full_unstemmed |
Photoelectrocatalytic Degradation of Paraquat by Pt Loaded TiO2 Nanotubes on Ti Anodes |
title_sort |
photoelectrocatalytic degradation of paraquat by pt loaded tio2 nanotubes on ti anodes |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2018-09-01 |
description |
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. |
topic |
photoelectrocatalysis TiO2 nanotube Pt loaded TiO2 paraquat polar herbicide degradation |
url |
http://www.mdpi.com/1996-1944/11/9/1715 |
work_keys_str_mv |
AT leventozcan photoelectrocatalyticdegradationofparaquatbyptloadedtio2nanotubesontianodes AT turanmutlu photoelectrocatalyticdegradationofparaquatbyptloadedtio2nanotubesontianodes AT sedatyurdakal photoelectrocatalyticdegradationofparaquatbyptloadedtio2nanotubesontianodes |
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1725503114381885440 |