How can one get confirmed the presence of redox couple in a material containing two different metals?

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For hot filtration test, what is the actual condition to separate the catalyst from the reaction mixture and run the reaction to complete?

I have done a reaction whose optimum time is 10 h. So at what time I should stop the reaction and separate the catalyst and then analyze. When the reaction completes 20 to 30% or at 5 h?

03 April 2013 3,539 5 View

What interaction is there in a metal(0) doped material? Which activates the reaction the metal(0) or the bulk material?

I have synthesized Pd doped Vanadium phosphates. One is Pd(0)-VPO and another is Pd(II)-VPO. If the Pd in Pd(0)-VPO is neutral then there will be no interaction, then how does it lie in the bulk...

01 February 2013 9,793 0 View

If there is no peak for the promoted material in the XRD of the catalyst, could we say that the doped material is either amorphous or well dispersed?

I have synthesized WO3 promoted vanadium phosphate, but I did not get any peak for WO3 in XRD. This may be due to the amorphous nature of WO3 or it was well dispersed or both. Could anyone make a...

01 February 2013 6,586 10 View

From UV-vis analysis, how can you tell whether the promoted material remains in bulk or isolated form?

I have synthesized WO3 promoted vanadium phosphate. How can it be proven from UV-vis analysis that the WO3 remains as W, WO3, WOx, WO3 or xH2O? Can anybody help me in this regard or suggest any...

01 February 2013 9,756 4 View

From NH3-TPD analysis, could it be possible to distinguish Bronsted and Lewis acid sites? If so then how?

I have synthesized WO3 based materials. The materials show two peaks at lower and higher temperature. I assume that lower temp. peak is for Bronsted acid sites and higher temp. peak is for Lewis...

01 February 2013 3,099 20 View

Why cant we get same strong peak for different planes for the same material?

As the X-ray fall on the same material what really happens?

11 December 2012 239 3 View

What is the difference between dye degradation and decomposition? What are the conditions for a material to be used in this process?

Can mesoporous material be used in dye degradation? I want to do some photocatalysis like dye degradation and wish to know about the materials used in this process.

08 September 2012 6,738 3 View

If a promoting material is not found in the XRD of the bulk material, what can we conclude? Is it amorphous or well dispersed in the bulk matrix?

Actually I have prepared Al-VPO. But I did not get any peak of Al in the XRD pattern of Al-VPO. So it might be well dispersed or amorphous? If so then which is the active sites if I'll use it for...

08 September 2012 8,816 13 View

Is the nanorod of any material one dimensional (1D) or two dimensional (2D)?

Some literature describes nanorods as 1D and some other 2D? Can anyone explain?

06 July 2012 755 13 View

I got rosette type morphology of my parent sample (VPO) but after impregnation with Molybdenum (Mo) its structure changes to irregular petals. Why?

Why does the morphology change with the impregnation of the bulk vanadium phosphorous oxide (VPO)? What happens? I have synthesized the Mo-VPO materials in wetness-impregnation method and calcined...

05 June 2012 143 8 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 3 View

Gobinda Behera

I can get all the phases. But how could I know that there exist a redox couple

V4+ +O- ------>V5+ +O2- and Mo6+ +O2- ---------> Mo5+ +O-

Fabio Lima

Maybe is possible analysis by electrochemistry or titulation pontenciometric, I go find one method in literature. And the methods then using complexation, it involves a redox reaction. You need the maximum precision the quanties metal in solid?