Sol-Gel Method for the synthesis of TiO2 nanoparticles
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How TiO2 nanoparticles are synthesized by sol-gel method
at first 10ml TTIP was added to 30 ml ethanol and stirred for 30min, then 3ml HNO3 was added to 150 ml deionized water and this solution was used as a hydrolysis catalyst. For hydrolysis reaction the aqueous solution was injected dropwise to the mixture of TTIP and ethanol in about 4 hours until an opaque suspension with high viscosity was produced; the obtained solution was heated at 100°C for 24 h until the solvents were evaporated, and after annealing at 600 °C for 4 h crystalline TiO2 nanoparticles were obtained. (the volumes and times can be different according to your target)
Reference:
www.sciencedir...
doi.org/10.101....
doi.org/10.108...
doi.org/10.108...
If you have any question please comment bellow
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#nanotechnology #nanoparticles #solgel #synthesis #tiO2nanoparticles #siO2nanoparticles#tio2
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Good experiment.
But do you have some data, charts,.. For instance when you dry the materials, you could measure the evaporated water as a function of time. You may need to put the sample in a flask and collect the vapor,... or periodically check the weight of the sample (with enough precision),...
Any quantitative information could be good for curious students.
If you have already published some data, why not indicate it in the video, or give a link to your paper(s).
Hi, thank you very much for your comment, the exact value of the materials are mentioned on the description. Besides, the link of the articles that we have published are there too. This video was made to show the main steps of the sol-gel method. But you are absolutely right and I think we cinsidered these points in other videos on the channel.
Thanks so much for sharing!!!
The link doesn't work, and i have a question for your comment about the procedure for synthesizing TiO2 nanoparticles. you wrote: ( the obtained solution was heated at 100°C for 24 h). my question is how can i heated it for one day it is too much. I prepare ZnO nanoparticles using sol- gel method but i heated it for 30 min. and let it for one day without any heated to obtain a clear gel
do you have the similar procedure if the precursor is TiCl4 because this is the only availble for me
When using TiCl4 as a precursor in the sol-gel process for producing titanium dioxide, the procedure typically starts with the controlled hydrolysis of TiCl4. This reaction is highly exothermic and produces HCl, so it is often performed at 0°C to control the reaction rate. The molar ratio of water to TiCl4 usually ranges from 10:1 to 20:1 to ensure complete hydrolysis. After hydrolysis, the solution is neutralized to a pH of around 2-3 using a base such as ammonia or an organic amine. The resulting sol is then peptized and stabilized, often requiring several hours of stirring.
The gelation process follows, where the sol transitions into a gel at room temperature over a period that can range from a few hours to a day, depending on the specific conditions. Aging of the gel then occurs, which can last from several days up to a week, to strengthen the polymeric network. The drying process removes the solvent, typically at 100-120°C for several hours, resulting in a xerogel. Finally, calcination is performed at higher temperatures, usually between 400-800°C, to induce crystallization of TiO2 and remove any remaining organic or inorganic species. The exact temperatures, timings, and concentrations can vary and should be optimized based on the desired properties of the final TiO2 product.
Appreciate your kind response with useful details@@NANOTECHNOLOGY_Nanoscience
If we need to prepare the ceramic coating solution. Can we use this for that purpose
After calcinating the tio2 particles into nanopowder. how do the nanoparticles adhere to surfaces to perform their function?
What is your surface?
organic materials ( plastics, fibers etc) and ceramic/ glass
@@NANOTECHNOLOGY_Nanoscience Sorry, could not get that email address to work. Have another? Carl p.
@@carlp.8551 Sorry no, try this one again.
@@NANOTECHNOLOGY_Nanoscience Exactly the same question, how do nanparticles adhere to surfaces to perform their functions, my surface is : glass, shape : beads, please any method ?
Hi, may i know if we have to add the entire 150ml of Nitic acid solution to the Ttip+ethanol solution over 4hours
در سنتز نانوذرات دی اکسید تیتانیوم با روش سل ژل، در مرحله تبدیل سل به ژل، چه عاملی باعث تبدیل سل به ژل میشود؟
I have to prepare Ui-66. Can I prepare through this method?
HNO3 replaced with NaOH solution can i get TiO2 ?
Yeah, It's okay
sir how is mesoporous titania prepared from TiCl4 of partical size 25 nm and layer thickness 500nm for perovskite solar cell?
plz anyone guide me
Hi! Kinldy asking if you know how to do the "dropwise addition f chemicals" for synthesis of nanoparticles? can I use titration setup? thank you
Yes you can.
can HNO3 be substituted for an acid like Hydrogen Chloride? the idea is that the counter ion is much stronger than that of Nitric acid. how will this affect my nanoparticles?
You should do the experiment and see how it affects the nanoparticles. We have not compared the type of acids, but it's common to use other acids too.
No, it can't
HCl could affect on gel formation.
And it's difficult to get rid of chlorine ions from the obtained powder (there's no washing step)so, it's ganna affect on the properties of TiO2. I mean you can't get pure titanium dioxide.
But you can use HCl in co-precipitation method. This method includes washing step so, you can remove chlorine ions easily.
And another one thing is that nitrates can decompose easily during calcination step but chlorine can't
@@asmaaosama1829 Thanks for the information. But I don't think this will be a problem. Because calcination temperature is high enough to decompose it.
You can't get rid of all chlorine ions just some of them I did it before and calcination temp was about 700 for 4h.
HCl isn't favourable in sol gel as well as NaOH for the same reason you can't get rid of sodium ions
Hello!
in which liquid should I dissolve the nanoparticles so that I can apply them to the solar panel on the roof of the house?
Thanks for answer
Hello, I will answer you asap.
Hi, we will make a video about it within the next few weeks.
After drying at 24 hours,we'll get the wet solid ?
Yeah
Hi, I'm preparing TiO2 and ZnO nanoparticles from sol gels... dry in oven for 1hr and calcine at 500 degree celsius for one hour.. my all samples are burned. What should I do to get white powder??
Do u know how to make tio2 liquid?
Whether it is aq. Sol gel mathode or nom aq. Sol gel method
Hi, it's the aqueous sol-gel method.
Colour of solution of TTIP + EtOH ?
❤❤
What ratios are used in this experiment??
10ml TTIP was added to 30 ml ethanol and stirred for 60min (this is solution one), then 3ml HNO3 was added to 150 ml deionized water (this is solution 2), and this solution was used as a hydrolysis catalyst. For the hydrolysis reaction, the aqueous solution was injected dropwise to the mixture of TTIP and ethanol (this step should take about 4 hours, don't add solution 2 to solution 1 fast and adjust the burette how this step takes at least 4 hours. This step is very important because if you add the solution very fast, that affects the final product size.). While adding the solution 2 to the solution one, a very thick white solution forms which cannot be stirred by the magnet, so you should stir it by yourself till the solution becomes thinner. After finishing the solution in the burette, the mixture should be stirred for another 1 hour. the obtained solution was heated at 100 °C for 24 h until the solvents were evaporated, and after annealing at 600 °C for 4 h crystalline TiO2 nanoparticles were obtained
Im writing a school report about this method, but I can't seem to figure out the reaction equations. Is there somewhere i can find this?
You can find the reaction of titanium alkoxide to produce nanoparticles in the following paper, in figure 2: iopscience.iop.org/article/10.1088/2053-1591/aaa2bb/meta
The title of this paper is "Stable superhydrophilic coating on superhydrophobic porous media by functionalized nanoparticles"
@@NANOTECHNOLOGY_Nanoscience Thank you very much!
Still don't get it ?
if i put the same volumes shown in the video how much of powder i will have finally please ?
@@NANOTECHNOLOGY_Nanoscience using the volumes in the description of the video how much powder can i obtain ??
@@wafaglantou2855 you will have about 3-5 gr
@@NANOTECHNOLOGY_Nanoscience thanks
another precursor for the synthesis of TiO2, please
Typical precursors are metal oxides and metal chlorides.
titanium tetraisopropoxide (TTIP)
titanium (IV) butoxide ( Tetrabutyl orthotitanate)
titanium tetrachloride (TiCl4)
@@NANOTECHNOLOGY_Nanoscience thanks
Can i make the solution of titanium isopropoxide by distilled water or deionized water
Of course not. Because TTIP reacts with water very fast and your particle size would be very larger than nanoscale. The water should be added slowly. In this step, a very thick white pasty substance forms and you should stir it by yourself besides the solution is stirring by the heater stirrer, because otherwise, it would stick to your beaker.
@@NANOTECHNOLOGY_Nanoscience Please, do you mean that we need to stir the solution of TTIP+ethanol by hand during 4 hours while injecting aqueous solution (which flow rate is about 0,63 ml/min) ? If not, we stirr by the magnetic stirrer under heating at what °C ?
@@sissi1702 No, you don't need to stir the solution by yourself for 4 hours. In the beginning, when you add the solution in the burette to the solution on the heater, a very thick substance forms which is needed to be stirred by a spoon. Otherwise, the heater stirrer cannot stir the solution because it is very thick. After about 10 or 15 minutes, the solution becomes more diluted and you no longer need to stir it by yourself and let the heater stirrer do that. You just follow the procedure and you will see what will happen. Maybe for the first time, you cannot get a good result but after that, you find out how to do it right.
Good luck
@@NANOTECHNOLOGY_Nanoscience Thanks fort the reply, I got it, but I still don't know how much is the temperature of the solution on the magnetic stirrer ?
@@sissi1702 50 or 60 C is ok.
What was the size range of NPs?
According to the synthesis conditions of nanoparticles, their size was between 10 and 87 nm. More information is available in the following paper:
iopscience.iop.org/article/10.1088/2053-1591/aaa2bb/meta
@@NANOTECHNOLOGY_Nanoscience Thanks!
Great 💜💜
Thanks.
@@NANOTECHNOLOGY_Nanoscience which field you study 🌼
@@AhmedGamal-ex2kq Chemical Engineering
@@NANOTECHNOLOGY_Nanoscience great 👌🏻🌼
Wish you luck; I need to learn some tips; could you please give your contact information...
ahmedgamalepri@gmail.com
For how long we need to do the calcination ??
for 4 hours at 600 °C
What is TTIP?
TTIP is a precursor for the synthesis of TiO2 nanoparticles.
@@NANOTECHNOLOGY_Nanoscience ok, thanks
Can i get the material
What do you mean?
What is the difference between this one (probably in terms of usage) and the analytical grade TiO2 powder of >99% purity?