Effects of deposition time on the photoelectrochemical properties of gold nanoparticles decorated titanium dioxide nanotubes

2018 ◽  
Author(s):  
S. S. Ismail ◽  
Z. M. Zain ◽  
Y. C. Lim
Keyword(s):  
Gold Nanoparticles ◽  
Titanium Dioxide ◽  
Deposition Time ◽  
Photoelectrochemical Properties ◽  
Titanium Dioxide Nanotubes

scholarly journals Comparison of Gold Nanoparticles Deposition Methods and Their Influence on Electrochemical and Adsorption Properties of Titanium Dioxide Nanotubes

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4269 ◽  
Author(s):  
Ewa Paradowska ◽  
Katarzyna Arkusz ◽  
Dorota G. Pijanowska
Keyword(s):  
Gold Nanoparticles ◽  
Titanium Dioxide ◽  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Photoelectron Spectroscopy ◽  
Bovine Serum ◽  
Electrochemical Impedance ◽  
Electrochemical Characterizations ◽  
Titanium Dioxide Nanotubes ◽  
X Ray

The increasing interest of attachment of gold nanoparticles (AuNPs) on titanium dioxide nanotubes (TNTs) has been devoted to obtaining tremendous properties suitable for biosensor applications. Achieving precise control of the attachment and shape of AuNPs by methods described in the literature are far from satisfactory. This work shows the comparison of physical adsorption (PA), cyclic voltammetry (CV) and chronoamperometry (CA) methods and the parameters of these methods on TNTs properties. The structural, chemical, phase and electrochemical characterizations of TNTs, Au/TNTs, AuNPs/TNTs are carried out using scanning electron microscopy (SEM), electrochemical impedance spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy. The use of PA methods does not allow the deposition of AuNPs on TNTs. CV allows easily obtaining spherical nanoparticles, for which the diameter increases from 20.3 ± 2.9 nm to 182.3 ± 51.7 nm as a concentration of tetrachloroauric acid solution increase from 0.1 mM to 10 mM. Increasing the AuNPs deposition time in the CA method increases the amount of gold, but the AuNPs diameter does not change (35.0 ± 5 nm). Importantly, the CA method also causes the dissolution of the nanotubes layer from 1000 ± 10.0 nm to 823 ± 15.3 nm. Modification of titanium dioxide nanotubes with gold nanoparticles improved the electron transfer and increased the corrosion resistance, as well as promoted the protein adsorption. Importantly, after the deposition of bovine serum albumin, an almost 5.5-fold (324%) increase in real impedance, compared to TNTs (59%) was observed. We found that the Au nanoparticles—especially those with smaller diameter—promoted the stability of bovine serum albumin binding to the TNTs platform. It confirms that the modification of TNTs with gold nanoparticles allows the development of the best platform for biosensing applications.

scholarly journals Scaling Up the Process of Titanium Dioxide Nanotube Synthesis and Its Effect on Photoelectrochemical Properties

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5686
Author(s):  
Mariusz Szkoda ◽  
Konrad Trzciński ◽  
Zuzanna Zarach ◽  
Daria Roda ◽  
Marcin Łapiński ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Tio2 Nanotubes ◽  
Significant Contribution ◽  
Scaling Up ◽  
Photoelectrochemical Properties ◽  
Titanium Dioxide Nanotubes ◽  
Vis Spectroscopy ◽  
Show Evidence ◽  
First Time ◽  
Scanning Electron

In this work, for the first time, the influence of scaling up the process of titanium dioxide nanotube (TiO2NT) synthesis on the photoelectrochemical properties of TiO2 nanotubes is presented. Titanium dioxide nanotubes were obtained on substrates of various sizes: 2 × 2, 4 × 4, 5 × 5, 6 × 6, and 8 × 8 cm2. The electrode material was characterized using scanning electron microscopy as well as Raman and UV–vis spectroscopy in order to investigate their morphology, crystallinity, and absorbance ability, respectively. The obtained electrodes were used as photoanodes for the photoelectrochemical water splitting. The surface analysis was performed, and photocurrent values were determined depending on their place on the sample. Interestingly, the values of the obtained photocurrent densities in the center of each sample were similar and were about 80 µA·cm2. The results of our work show evidence of a significant contribution to wider applications of materials based on TiO2 nanotubes not only in photoelectrochemistry but also in medicine, supercapacitors, and sensors.

Titanium dioxide nanotubes conjugated with quercetin function as an effective anticancer agent by inducing apoptosis in melanoma cells

2021 ◽  
Author(s):  
Surendra Gulla ◽  
Dakshayani Lomada ◽  
Prasanna Babu Araveti ◽  
Anand Srivastava ◽  
Mamatha Kumari Murikinati ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Anticancer Agent ◽  
Melanoma Cells ◽  
Titanium Dioxide Nanotubes

scholarly journals Unique Effects of Iron(III) Ions on Photocatalytic and Photoelectrochemical Properties of Titanium Dioxide

1997 ◽  
Vol 101 (49) ◽  
pp. 10605-10605 ◽  
Author(s):  
Teruhisa Ohno ◽  
Daisuke Haga ◽  
Kan Fujihara ◽  
Kaoru Kaizaki ◽  
Michio Matsumura
Keyword(s):  
Titanium Dioxide ◽  
Photoelectrochemical Properties

Titanium dioxide nanotubes: synthesis, structure, properties and applications

2021 ◽  
Vol 90 ◽  
Author(s):  
Andrey Andreevich Rempel ◽  
Al′bina Akhmetovna Valeeva ◽  
Alexander Sergeevich Vokhmintsev ◽  
Ilya Alexandrovich Weinstein
Keyword(s):  
Titanium Dioxide ◽  
Titanium Dioxide Nanotubes ◽  
Structure Properties
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