TY - JOUR
T1 - Cathodic luminol electrochemiluminescence on TiO2 nanotube array
AU - Fatah, Fadhlir R.A.A.
AU - Sanjaya, Afiten R.
AU - Rahmawati, Isnaini
AU - Syauqi, Muhammad I.
AU - Gunlazuardi, Jarnuzi
AU - Ivandini, Tribidasari A.
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2024/6/1
Y1 - 2024/6/1
N2 - This study introduces a novel fabrication of screen-printed electrode of hierarchical thin layers of TiO2 nanotube arrays (TNA) and its preliminary investigation for cathodic electrochemiluminescence (ECL) of luminol. The TNA growth on titanium foil by anodization technique was studied under various anodization times and counter electrodes (Pt wire and stainless-steel plate). Characterization using FTIR, UV-VIS DRS, and XRD revealed the increase of TiO2 formation at longer anodization times. The TNA synthesized with a stainless-steel counter electrode (TNA-SS) for 2000 s exhibited better nanotube growth and a higher electrochemical active surface area compared to the one using Pt counter electrode (TNA-Pt). The SEM characterization verified the nanotube morphology of TNA-SS with an average pore diameter of 50.46 nm and a tube length of ∼1100 nm. Notably, when TNA applied as the working electrode for the ECL of luminol, a reduction peak at −0.8 V accompanied by a clear ECL signal were observed, reaching an optimum intensity at 15 μM luminol. A comparative analysis between TNA-SS and TNA-Pt revealed the same trend of ECL signals with a significantly higher ECL intensity of TNA-SS than that of TNA-Pt. The ECL intensity of TNA-SS 2000s was also higher than TNA-SS 300s, confirming the importance of TNA surface area to the ECL activity. Nevertheless, the synthesized SPE-TNA shows great prospect to be applied in electroanalytical and sensing fields, offering opportunities for the development of electrochemiluminescence technologies.
AB - This study introduces a novel fabrication of screen-printed electrode of hierarchical thin layers of TiO2 nanotube arrays (TNA) and its preliminary investigation for cathodic electrochemiluminescence (ECL) of luminol. The TNA growth on titanium foil by anodization technique was studied under various anodization times and counter electrodes (Pt wire and stainless-steel plate). Characterization using FTIR, UV-VIS DRS, and XRD revealed the increase of TiO2 formation at longer anodization times. The TNA synthesized with a stainless-steel counter electrode (TNA-SS) for 2000 s exhibited better nanotube growth and a higher electrochemical active surface area compared to the one using Pt counter electrode (TNA-Pt). The SEM characterization verified the nanotube morphology of TNA-SS with an average pore diameter of 50.46 nm and a tube length of ∼1100 nm. Notably, when TNA applied as the working electrode for the ECL of luminol, a reduction peak at −0.8 V accompanied by a clear ECL signal were observed, reaching an optimum intensity at 15 μM luminol. A comparative analysis between TNA-SS and TNA-Pt revealed the same trend of ECL signals with a significantly higher ECL intensity of TNA-SS than that of TNA-Pt. The ECL intensity of TNA-SS 2000s was also higher than TNA-SS 300s, confirming the importance of TNA surface area to the ECL activity. Nevertheless, the synthesized SPE-TNA shows great prospect to be applied in electroanalytical and sensing fields, offering opportunities for the development of electrochemiluminescence technologies.
KW - Cathodic electrochemiluminescence
KW - Cyclic voltammetry
KW - Luminol
KW - TiO nanotubes array
UR - http://www.scopus.com/inward/record.url?scp=85190265483&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2024.129288
DO - 10.1016/j.matchemphys.2024.129288
M3 - Article
AN - SCOPUS:85190265483
SN - 0254-0584
VL - 319
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
M1 - 129288
ER -