Ranjan Rai

8 Questions 6 Answers 0 Followers

Questions related from Ranjan Rai

What should be degassing temperature for graphene oxide in BET experiment?

I have synthesized GO using improved Hummers method and want to find out it's surface area. So what temperature should I degas the GO without reducing it.

05 April 2021 8,865 12 View

What causes lower value of surface area for material with smaller particle size?

I have synthesized compound one without surfactant and other with some amount of surfactant. From SEM micrograph particle size are smaller for one synthesized with surfactant but from BET...

12 March 2021 6,391 7 View

What could be the reason for increase in particle size in sol-gel synthesis using PVA as additive?

I have synthesized a material using sol-gel synthesis method adding PVA as surfactant. i observed that particle size has increased compared to sample prepared without addition of PVA. kindly give...

27 February 2021 9,484 3 View

How do we find the valence band edge and conduction band edge potential using cyclic voltametry?

For instance for many photocatalyst we can theoritically calculate the valence band edge and conduction band edge potential using the following formula Evb=X-Ee+0.5 Eg. But what is the...

29 August 2019 6,243 1 View

For producing g-C3N4 from melamine.what is the balanced chemical equation ?

i want to make organic -inorganic hetero structure of various compostion.what amount of melamine gives me what amount of g-C3N4? how do i caculate ?

24 January 2019 9,715 1 View

Can i use samarium oxide dissolved in nitric acid for doping in sol gel synthesis ?

For e.g i want to doped bismuth with samarium in bismuth ferrite.but i have Sm2O3 rather than samarium nitrate.could i use samarium oxide dissolved in nitric acid to dope in bismuth site.

08 December 2018 8,710 0 View

What are the possible causes for disappearance of some peaks on doping?

For instance i have doped Bismuth with Sm and what i observe is the disappearance of some peaks with increase in dopant concentration.for 5mol% doping there was reduction in peak intensity but...

12 September 2018 1,308 3 View

i wanted to study the photocatalytic property of a compound whose band gap is around 1.7 eV.My question is what would best dye to use ?

I tried with rhodamine B with irradiation source 50 W LED but could not observe any change in the UV-Vis spectrum for the sample taken out after interval of 1 hour each. even for sample irradiated...

30 August 2018 5,837 6 View