How can I avoid precipitates in titanium dioxide sol in synthesis of TiO2 thin film using sol-gel method?
Please follow the attached link.
https://www.researchgate.net/post/titanium_dioxide_synthesis_via_Sol-Gel
Please follow the attached link.
https://www.researchgate.net/post/titanium_dioxide_synthesis_via_Sol-Gel
Hi there,
If you use a Titanium isopropoxide (TTIP/TTIP) as precursor must be essential use a GLOVE BOX as it to avoid a side effect which may happen later such as the moisture .Ok, you can add a suitable a surfactant. see the following article
Regards,
Everything depends on the synthesis conditions. In general, if you put TIPO in ethanol should be more than enough.
If you still have problems, use the glove box as other researchers recommended.
Also is quite important the control of the pH for sure.
Article Effect of the RE (RE = Eu, Er) doping on the structural and ...
Hi Khudhiar
Adding HCl to a Ti(IV) sol generally prevents the formation of amorphous TiO2 precipitates in your sol.
Here is a sol recipe we commonly use
Ethanol (5 mL), Ti(IV) propoxide or Ti(IV) isopropoxide (5 mL), 70% HCl (1 mL) and water (2 mL). This can be scaled up as required.
Mix the ethanol and Ti(IV) alkoxide under vigorous magnetic stirring, and then add the HCl dropwise and then the water dropwise under constant stirring. Stir for 5 min, and then store the sol in a sealed polypropylene centrifuge tube or something similar when you are not using the sol (exposure to air will lead to evaporation of ethanol and H2O absorption from the atmosphere, leading to amorphous TiO2 formation). This recipe should give a stable slightly yellow sol and a nice film when applied to substrate and the solvent allowed to evaporate.
Best regards
Geoff
HI Dear:
Try adding a surfactant like Ethylene glycol buthyl ether (EGBE). When i was preparing electrolytes with TiO2 NPs i experienced particle agglomeration. By simply adding a few drops of EGBE the particles dispersed very well in the solution and the deposited films by screen printing were very uniform and continuous.
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