The effect of synthesis conditions on morphology and catalytic activity has been studied for hydrothermal preparation of TiO2 from acidified aqueous TiOSO4 solution. It was found that the increase in TiOSO4 and H2SO4 concentration results in the increase of photocatalytic activity of produced TiO2, as it was revealed by steady-state gas-phase oxidation of acetone and ethanol vapors in a flow-circulating reactor. TiOSO4 concentration exerts strong influence on the shape of the produced TiO2 particles. At TiOSO4 concentration less than 0.1 wt%, hydrolysis gives rise to hedgehog-like agglomerates consisting of spliced-blade TiO2 nanocrystals. At higher concentration of TiOSO4, the resultant TiO2 consists of round agglomerates of 5–10 nm primary particles. The size of secondary particles depends mainly on the H2SO4 concentration. The increase of the time of hydrothermal treatment results in the enhancement of TiO2 photocatalytic activity that reaches a maximum. Among different acids (HCl, HClO4, HNO3, H3PO4 and CH3COOH) added during hydrolysis of TiOSO4, sulfuric and acetic acids had the best effect on photocatalytic activity of TiO2. The results obtained can help to finely tune this TiO2 preparation method in order to obtain desirable particles size, shape and activity.
Research on Chemical Intermediates – Springer Journals
Published: Apr 15, 2009
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera