p. Gnanaprakasam

10 Questions 21 Answers 0 Followers

Questions related from p. Gnanaprakasam

Why are most alcohol oxidation reactions carried out in acidic medium?

in most of the alcohol (methanol, ethanol) oxidation papers the medium used is acidic. i have seen only few papers in basic medium. what is the specialty in acidic medium or is a challenge to...

28 November 2014 9,143 8 View

Is there any negative effect happen if we increase the concentration of reducing agent?

In solution reduction method to prepare Au nanoparticles by chemical reducing agents like sodium borohydride, ascorbic acid etc., are used in particular concentration. What will happen if we...

20 November 2013 5,645 2 View

How to calculate ID/IG ratio in raman peak for graphene material?

I know the intensity of d band peak and g band peak, but I don't know how to calculate ID/IG can anyone explain? Thanks in advance.

02 September 2013 8,259 21 View

Can anyone help me to find out the Turn Over Frequency (TOF) of the catalytic reaction?

I am trying to find out the rate constant and TOF for the Nitrophenol reduction reaction, usually all papers they are not explaining about the method of calculating rate constant and TOF can any...

20 August 2013 1,907 6 View

Why do both transmittance and absorption peaks appear in FTIR spectra?

I have recorded FTIR for reduced graphene oxide and graphite flakes it shows both transmittance and absorption peaks. Whether transmittance peaks are enough, what is the reason for the presence of...

03 January 2013 6,761 10 View

What is the unique nature of graphene? Is it hydrophobic or hydrophilic ?

Graphene is usually a hydrophobic material, that is why it settles down after the completion of the reduction process, we will use some dispersive agents to make it disperse in water, but some...

12 December 2012 320 10 View

What are the factors affecting the dispersion of graphene in water?

I prepared graphene using chemical reduction method, i dispersed it in water it dispersed well and the dispersion was stable for a month. Now I am trying the same procedure, but the dispersion...

12 December 2012 2,355 9 View

Which elemental composition ( carbon, oxygen %) is good for graphene?

In elemental analysis of graphene somebody reported the % of carbon 84%,oxygen 10% some people reported carbon > 90%. actually which one is the good composition for pure graphene.

23 November 2012 5,430 4 View

Is it possible to synthesize good quality graphene from graphite in one step except using sticky tape?

Usually we synthesize graphene from GO by reduction, where the synthesis of GO is another step. Is there any method available to synthesize graphene from graphite in one step except the sticky...

23 November 2012 9,761 12 View

The usual SPR peak for graphene in UV spectra is 270nm but my sample has a peak around 253nm, what is the inference ?

Attached my file

06 November 2012 9,256 3 View