Ahmad Nauman

11 Questions 11 Answers 0 Followers

Questions related from Ahmad Nauman

Can temperature change from room temp. to ~80 C affect the solubility or dissolution of ZnO NPs ?

02 February 2016 3,650 0 View

Is it possible to get high resistivity and low current values at higher electrolyte concentration?

During the electrolysis of water in the presence of KCl as electrolyte when I collect current and voltage data by oscilloscope, the current value decreases from 3A (at 100 ppm KCl concentration)...

12 December 2014 3,536 4 View

Is it possible to ppt out Cu(OH)2 at acidic pH (4-6)?

I'm synthesizing CuO at pH below neutral. In order to sort out mechanism when I see literature mostly CuO NPs are produced at higher pH by 2 step mechanism. First production of Cu(OH)2 and then...

12 December 2014 5,574 13 View

How it is possible that I dissolve CuCl2.2H2O in DI water & add KOH at 50oC to get Cu ppt. But when i do XRD there is no peak for any copper compound?

I have repeated this experiment many times and at different pH from 7-11 but every time XRD show nothing. can any one please explain this for me ??

11 November 2014 4,169 8 View

How do you precipitate CuOH2 out in an aqueous solution with a pH of 4-5?

What techniques can be used?

11 November 2014 8,738 1 View

How should i prepare sample for XRD analysis. I want to characterize CuO (expecting) nanoparticles ?? Whats the standard procedure for that ??

10 October 2014 3,637 1 View

Is there any method to remove monovalent cations before detection of DI-valent ions by Cation IC?

I am using cation IC with a pre-concentrator for the detection of copper ions in waste-water. My samples often have a large concentration of Na, NH4 and K which interferes with the Copper peak as...

10 October 2014 9,625 11 View

Can someone please help me to find a some classical simple method for the quantification of copper in water at ppb level ?

Currently im using Ion chromatography but due to some interferences from Na ions, which have very close retention time to that of copper so that i can't quantify the copper very accurately. So i...

10 October 2014 9,779 19 View

Is their any simple method for determining the Free radicals (OH, O, H - individual detection/measurement) qualitatively or quantitatively in water ?

Thanks.

08 August 2014 6,433 7 View

How can I quantify the different Copper species present in water?

Is it possible to quantify the ionized Cu, Cu2O and Cu(OH)2 in a given water sample?

07 July 2014 5,540 17 View

What is the best material to carry out a radical reaction in the presence of metal ions?

I observe attachment of some particles (which I guess can be some form of metal which is present in solution) with the surface of glass reactor after the reaction. I don't know which material I...

06 June 2014 6,345 4 View