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Message Icon Topic: Preparation of transparent TiO2 films. Post Reply Post New Topic
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gabonino
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Quote gabonino Replybullet Posted: 11 September 2003 at 7:47pm

ChiangAST,

how do you change this pH after achieving the formation of a stable colloidal dispersion? addition of a base? adition of some kind of counterion? further dillution?

Anyway, I got another question for the forum. Everybody has been commenting dip coating techniques. If I intend to use electrodeposition as the technique to obtain the coating, what should I do? Are there any useful references for titania you could let me know? which wuold be the conditions for this electrophoretic way?

Oscar Gabriel Niño A.
Chemical Engineer
Universidad Nacional de Colombia
M. Sc. Process and Energy Engineering
Technische Universität Berlin
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ceec
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Quote ceec Replybullet Posted: 08 October 2003 at 2:52am

I'm new to the sol gel chemistry...the posted recipe is very useful to my research study...I would like to know the way to incorporate zeolite into TiO2 film...are two percusors required?

Besides, can you tell the lifetime of the film after coating? any regeneration method to keep the film more long lasting?

Thanks in advance!!

Rgd,

Esther

 

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Quote administrator Replybullet Posted: 08 October 2003 at 4:20am

Studies which make uses of recipes in this forum can be referenced by reporting this link

http://www.solgel.com at http://www.solgel.com/forum/display_topic_threads.asp?ForumID=4&TopicID=110&ReturnPage=&PagePosition=1&ThreadPage=1

Thanks in advance

 

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vedichi
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Quote vedichi Replybullet Posted: 07 November 2003 at 9:01am

hai!

   i am doing research in the field of thin film solar cells, urgently i need the reference Journal papers in the topic of " study of FT-Raman spectrsopy in Tio2 thin films". plz kindly guide me in light way,

by vedichi

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Quote administrator Replybullet Posted: 08 November 2003 at 3:40am

The  references below may help.

Wang JQ, Xin BF, Yu HT, et al.
Raman spectroscopy of titanium dioxide photocatalyst
CHEM J CHINESE U 24 (7): 1237-1240 JUL 2003

Alam MJ, Cameron DC
Preparation and characterization of TiO2 thin films by sol-gel method
J SOL-GEL SCI TECHN 25 (2): 137-145 SEP 2002


Zhu YF, Li W
Raman spectrum research on structure and performance of nanometer TiO2 photocatalyst supported on stainless steel netweb
SPECTROSC SPECT ANAL 23 (3): 494-497 JUN 2003


Zoppi RA, Trasferetti BC, Davanzo CU
Sol-gel titanium dioxide thin films on platinum substrates: preparation and characterization
J ELECTROANAL CHEM 544: 47-57 MAR 13 2003

Zhou XF, Chu DB, Wang SW, et al.
New route to prepare nanocrystalline TiO2 and its reaction mechanism
MATER RES BULL 37 (11): 1851-1857 SEP 2002

Djaoued Y, Badilescu S, Ashrit PV, et al.
Low temperature sol-gel preparation of nanocrystalline TiO2 thin films
J SOL-GEL SCI TECHN 24 (3): 247-254 JUL 2002


 Brioude A, Lequevre F, Mugnier J, et al.
Raman spectroscopy of sol-gel ultrathin films enhanced by surface plasmon polaritons
J APPL PHYS 88 (11): 6187-6191 DEC 1 2000

Ivanda M, Music S, Popovic S, et al.
XRD, Raman and FT-IR spectroscopic observations of nanosized TiO2 synthesized by the sol-gel method based on an esterification reaction
J MOL STRUCT 481: 645-649 Sp. Iss. SI MAY 4 1999

Almeida RM
Spectroscopy and structure of sol-gel systems
J SOL-GEL SCI TECHN 13 (1-3): 51-59 1998

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Quote vedichi Replybullet Posted: 11 November 2003 at 6:29pm

dear adminstrator,

 thaks a lot for ur valuable refrences. it is very useful for my research work. once again i convey my hearty thanks to u.

vedichi

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pojengwang
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Quote pojengwang Replybullet Posted: 24 February 2004 at 12:43am

I have tried to synthesis titania sol. It contains 14.5wt% titania after peptizing it on pH=1.5. But after stirring for 9 days  it solidify to jelly like a jam. Does anyone understand why it happens?

Thank you!

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ceec
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Quote ceec Replybullet Posted: 02 March 2004 at 1:55am

By the recipe of M.Prassas or other sol-gel method, could anyone describe how the gel looks like when it is said to be ready for experiment or coating? I don't know if mine has been over since I got pale white jam!!

Thx!!

 

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Quote M.Prassas Replybullet Posted: 02 March 2004 at 3:24am

After prepapring the solution you should wait at least 24 hours before making a coating. The solution it looks water clear (depends of the purity of your initial precursor it may be also light yellow). If you want to preserve the solution from gelation you may need to keep it in a refrigerator. In this way you can have a workable solution for months.

I hope this can help 

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ceec
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Quote ceec Replybullet Posted: 02 March 2004 at 9:41pm
thx for your prompt reply ^^...do you mean the color and texture of the solution shouldn't be changed (remains light yellow) after 24 hours?
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