How can I prepare Au/Al2O3 catalyst through coprecipitation method?

More Vaibhav Rana's questions See All

At what temperature should I calcine my copecipitated sample to obtain Au/Al2O3 such that Al2O3 is in GAMMA form?

I am preparing Au/Al2O3 catalyst through coprecipitation. I calcined the dried precipitate at 400 degree C for 4 hours, but the XRD of the calcined sample did not showed presence of gamma Alumina....

02 March 2019 7,785 6 View

How can I synthesis gold nanoparticles of variable sizes but less than 10nm through a tunable method?

I need to do a study of effect of gold nanoparticles size on its catalytic properties. I am preparing gold supported on alumina catalyst by colloidal deposition method and need to know a size...

31 December 2018 2,469 3 View

How to avoid fouling of gold nanoparticles on ptfe tube surface?

I am synthesising gold nanoparticles in a PTFE tubular reactor. How can I minimize fouling of nanoparticles on the surface of the reactor?

06 July 2018 5,826 4 View

How to develope an oscillatory flow using a peristeltic pump?

I want to study the effect of oscillatory flow on the synthesis of gold nanoparticles in a tubular reactor. Is there any way to create such flow using a peristaltic pump?

06 July 2018 7,765 1 View

How to do Turkevich method synthesis when HAuCl4 and Na3citrate are mixed before heating i.e at room temperature?

We're designing a flow reactor for Turkevich method of gold nanopaticles (AuNP) synthesis. It's important for us to mix the reactants at normal temperature at then heat the mixture. We did a batch...

01 February 2018 6,334 0 View

How to synthesis gold nanoparticles through Turkevich method when HAuCl4 and Na3citrate are mixed before heating?

We are using a mixture of HAuCl4 and Na3citrate (mixed at room temperature) to carry out Turkevich method for AuNp synthesis but we are not getting result. What can we do?

01 February 2018 7,656 3 View

Maintaing constant pH during the gold nanoparticles synthesis.

What buffer should I use to maintain a constant 9 and 3 pH during the gold nanoparticles synthesis? I am using Ascorbic Acid and PVP as reducing and caping agent respectively.

01 January 1970 9,217 11 View

How to polymerize TEOS?

I want to polymerize TEOS on a surface. I know that NH4OH is a preferred catalyst and an alcoholic solvent should be used .But I can not find certain amounts of each material to use. Does any one...

02 March 2021 1,404 6 View

Ester cleavage conditions?

Hi all, I need to cleave the ester in Ethyl 2-amino-1H-imidazole-5-carboxylate to make the carboxylic acid and retrieve the product from solution to use in downstream applications of linking to...

01 March 2021 8,766 3 View

How to quantify carbon deposition on CuZnAl catalyst?

Dear All, I want to quantify carbon deposition on the surface of the CuZnAl catalyst. I have tried thermogravimetric analysis, but I've got weight gain as the active Cu- get oxidised. Does anyone...

01 March 2021 1,907 3 View

Is it efficient to do liquid biopsy to investigate the gene expressions of the tumor?

To do liquid biopsy and look for specific gene expressions there are so many published papers. Thera are different protocols and procedures used to isolate circulating cell free RNA or mRNA from...

23 February 2021 7,326 5 View

Any Homemade Organic Synthesis Practices?

Hi everyone, I am a teacher of Heterocycles Synthesis, Is there a home practice that you recommend for undergraduate students? A simulator would also be useful Due to the pandemic, students...

18 February 2021 2,769 4 View

How to predict the reaction pathway for electro organic synthesis?

Can anyone recommend some any software/models available that can predict substance reactivities and the reaction yield under a specific set of reaction conditions process and proposing pathways to...

17 February 2021 2,383 3 View

Has anyone encountered any problems with abm good microRNA primers for quantification of mature miRNAs?

I've been trying to quantitate mature microRNAs in 293T cells with and without 'X'. 2ug of total RNA (isolated by Trizol method) is converted to cDNA using All-in one microRNA cDNA synthesis kit...

17 February 2021 8,986 2 View

How to measure acetic anhydride solution with 18M sulfuric acid?

I am doing research on the synthesis of paracetamol. I am preparing acetic anhydride solution with a few drops a sulfuric acid and wish to measure the pH of this solution. However my pH meter...

14 February 2021 8,699 3 View

Best synthesis method for large scale silver nanoparticle synthesis with high yield?.Best post processing steps after nanoparticle synthesis?

I have chemically synthesized silver nanoparticle to combat microbes on wound site. I have used many methods of synthesis, but I found minimal field of silver NP product.I am getting whitish...

11 February 2021 4,964 13 View

PEG coated Fe3O4 nanoparticles in aqueous NH3?

Hello, I synthesized PEG coated Fe3O4 nanoparticles by coprecipitation methods and I would like to ask whether they can be dispersed in aqueous NH3 since they have a PEG coating and theoretically...

06 February 2021 5,217 4 View

Axel Klein

What do you intend as product?

Core-shell nanoparticles? If yes, what shall be the shell, which the core?

Or do you intend to prepare a mixture of Au and Al2O3 nanoparticles?

Or do you dream of particles in which Au and Al2O3 are randomly distributed? I don't think that the last is possible - I cannot think about a structure for such particles.

Or do you think about layered systems?

Vaibhav Rana

Sir (Axel Klein), I need to synthesis a catalyst with Alumina as a support on which gold nanoparticles are dispersed inside the pore surface as well as on the bulk surface. I will be thankful if you could suggest me a method for synthesis of such catalyst through coprecipitation method.

OK, thank you for the details. I will check the best source for this.

Sikandar Khan

Please have a look at these useful links.

http://www.nacatsoc.org/18nam/Posters/P391-PREPARATION%20OF%20A%20COPRECIPITATED%20Au-Al2O3%20CATALYST.pdf