scholarly journals Effect of hydrothermal time and acid-washing on the antibacterial activity of Sodium titanate nanotubes

2021 ◽  
Vol 1046 (1) ◽  
pp. 012025
Author(s):  
H Mohamed ◽  
A H Zaki ◽  
Fatma I Abo El-Ela ◽  
S I El-dek
2020 ◽  
Vol 331 ◽  
pp. 135422 ◽  
Author(s):  
Marina M. Leite ◽  
Vitor L. Martins ◽  
Flavio M. Vichi ◽  
Roberto M. Torresi

2013 ◽  
Vol 210 (11) ◽  
pp. 2284-2291 ◽  
Author(s):  
Ivan Brnardić ◽  
Miroslav Huskić ◽  
Polona Umek ◽  
Alberto Fina ◽  
Tamara Holjevac Grgurić

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Thalles M. F. Marques ◽  
Cleanio Luz-Lima ◽  
Marco Sacilloti ◽  
Kazunori Fujisawa ◽  
Nestor Perea-Lopez ◽  
...  

The optical properties of titanate nanotubes (TiNts) intercalated with rare earths (RE) ions were intensively investigated in this study. To prepare the nanomaterials, sodium titanate nanotubes (Na-TiNts) were submitted to ion exchange reactions with different rare earth elements (RE: Pr3+, Er3+, Nd3+, and Yb3+). To the best of our knowledge, it is the first time that these RE-TiNts were synthesized. All samples were characterized by Raman spectroscopy, X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDS). Furthermore, the optical properties were examined using photoluminescence spectroscopy (PL) and UV-Vis-NIR absorption spectroscopy. The PL intensity (visible range) of the RE-TiNt samples showed a strong dependence when the temperature was decreased down to 20 K. This PL enhancement probably was promoted by electronic modifications in titanate layer band gap and/or interface charge transfers due to RE ions intercalation.


2010 ◽  
Vol 63 (2) ◽  
pp. 293 ◽  
Author(s):  
Jeffrey S. Church ◽  
Keith Fincher ◽  
Xingdong Wang

Sodium titanate nanotubes were prepared hydrothermally and sodium ions were exchanged for hydrogen ions by washing with water and further treatment with HCl. No anatase or rutile was produced during the exchange. Photo-catalysts were prepared by calcination and their activity was compared in UV-A and simulated sunlight by bleaching methyl orange, which does not adsorb onto the catalyst’s surface. Only photo-catalysts with low sodium content were capable of bleaching the dye. More photo-oxidation occurred in simulated sunlight suggesting that the dye is absorbing visible light and transferring this energy to the TiO2. The preparation of highly active photo-catalysts from sodium titanate nanotubes may well depend on optimizing their preparation to minimize sodium content without the formation of rutile.


2008 ◽  
Vol 53 (24) ◽  
pp. 7061-7068 ◽  
Author(s):  
H. Zhang ◽  
X.P. Gao ◽  
G.R. Li ◽  
T.Y. Yan ◽  
H.Y. Zhu

2010 ◽  
Vol 114 (18) ◽  
pp. 8192-8198 ◽  
Author(s):  
Carlos Díaz-Guerra ◽  
Polona Umek ◽  
Alexandre Gloter ◽  
Javier Piqueras

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