Aerosol assisted chemical vapour deposition of hydrophobic TiO2–SnO2 composite film with novel microstructure and enhanced photocatalytic activity

Titanium dioxide (TiO2) nanoparticles were produced using chemical vapour deposition (CVD) at different deposition temperatures (300–700°C). All the samples were heat treated at their respective deposition temperatures and at a fixed temperature of 400°C. A scanning electron microscope (SEM), a transmission electron microscope (TEM), and X-ray diffraction (XRD) were used to characterize the nanoparticles in terms of size and crystallinity. The photocatalytic activity was investigated via degradation of methylene blue under UV light. The effects of post deposition heat treatment are discussed in terms of crystallinity, nanoparticle size as well as photocatalytic activity. Crystallinity was found to have a much larger impact on photocatalytic activity compared to nanoparticle size. Samples having a higher degree of crystallinity were more photocatalytically active despite being relatively larger in size. Surprisingly, the photocatalytic activity of the samples reduced when heat treated at temperatures lower than the deposition temperature despite showing an improvement in crystallinity.

Download Full-text

Comparison of Photocatalytic Activity of TiO2 Anatase Prepared by the Sol-Gel Technique and Chemical Vapour Deposition on Naphthalene in the Gas Phase

Nanotechnological Basis for Advanced Sensors - NATO Science for Peace and Security Series B: Physics and Biophysics ◽

10.1007/978-94-007-0903-4_52 ◽

2011 ◽

pp. 493-498

Author(s):

Mirko Marinkovski ◽

Goran Nacevski ◽

Radmila Tomovska ◽

Perica Paunović ◽

Radek Fajgar

Keyword(s):

Photocatalytic Activity ◽

Gas Phase ◽

Chemical Vapour Deposition ◽

Vapour Deposition ◽

Sol Gel ◽

Chemical Vapour ◽

Tio2 Anatase ◽

Gel Technique

Download Full-text

Combinatorial atmospheric pressure chemical vapour deposition (cAPCVD) of niobium doped anatase; effect of niobium on the conductivity and photocatalytic activity

Journal of Materials Chemistry ◽

10.1039/c0jm01244k ◽

2010 ◽

Vol 20 (38) ◽

pp. 8336 ◽

Cited By ~ 47

Author(s):

Andreas Kafizas ◽

Charles. W. Dunnill ◽

Ivan P. Parkin

Keyword(s):

Photocatalytic Activity ◽

Chemical Vapour Deposition ◽

Atmospheric Pressure ◽

Vapour Deposition ◽

Chemical Vapour ◽

Niobium Doped ◽

Pressure Chemical

Download Full-text

Aerosol assisted chemical vapour deposition of a ZrO2–TiO2 composite thin film with enhanced photocatalytic activity

RSC Advances ◽

10.1039/c5ra12340b ◽

2015 ◽

Vol 5 (83) ◽

pp. 67944-67950 ◽

Cited By ~ 9

Author(s):

Abdullah M. Alotaibi ◽

Sanjayan Sathasivam ◽

Ivan P. Parkin

Keyword(s):

Thin Film ◽

Photocatalytic Activity ◽

Chemical Vapour Deposition ◽

Vapour Deposition ◽

Chemical Vapour ◽

Composite Thin Film ◽

Photocatalytic Properties

ZrO2–TiO2 composite thin film deposited via aerosol assisted chemical vapour deposition showed enhanced photocatalytic activity compared to pure anatase TiO2. The photocatalytic properties were determined using resasurin redox dye.

Download Full-text