F. Febiyanto

10 Questions 10 Answers 0 Followers

Questions related from F. Febiyanto

What's the true for the instrument error or structure destruction if the XRD peaks have shifted to the lower thetha (°)?

Dear colleagues, I have analyzed the crystallinity of photocatalyst material (without calcination treatment and calcined samples) using XRD in two place XRD analysis services in my campus. When I...

27 June 2020 544 13 View

Is there any discussion about absorption (absorbance) changing in DRS analysis?

Dear colleagues, I had synthesized silver-phosphate based photocatalyst material with the addition of PEG (various PEG concentration and chain length). When I analyzed using Diffuse Reflectance...

18 March 2020 9,441 3 View

Bohr atomic radius for semiconductors (photocatalysts)

Dear colleagues, Since band gap energy is related to material size, somehow, the quantum phenomenon could be found in the range of Bohr atomic radius for semicondutor based materials. Did you...

01 January 1970 2,238 2 View

Relationship between particle size and band gap energy of semiconductor

Since the small particle has low band gap energy and thus shift the absorption profile to the lower wavelength, somehow, a higher particle size behaves contrarily. Is there any formula to...

01 January 1970 7,442 7 View

A useful software in inorganic chemistry illustration

Dear colleagues, Software like biorender (link below) is useful to support researcher in illustrating their researches. However, maybe it is merely difficult to find an appropriate software...

01 January 1970 8,235 3 View

PH setting using acid and base compounds

Dear colleagues pH setting such as for testing the stability of photocatalyst (or other materials) is one of the important thing. Generally, this condition can be adjusted by pouring or dropping...

01 January 1970 6,816 3 View

Determination of crystallite size using XRD data with the highest peak intensity

Dear colleagues, When I read paper, the crystallite size can be calcukated by taking the XRD data with the highest intensity profile. Btw, in our research using Ag3PO4 photocatalyst, it observed...

01 January 1970 8,314 4 View

Mono- and polychromatic of light sources

Dear colleagues, To date, I have researched photocatalyst based materials, this was done under the UV or visible light irradiation. When I used a commercial lamp (they have red or blue-appeared...

01 January 1970 275 3 View

A formula to convert Watt (W) to the light intensity?

Dear colleagues, I am doing a research using visible light as simulated light on the photocatalysis reaction. Then, I want to convert a Watt (W) of lamp to the light intensity (flux)....

01 January 1970 7,837 1 View

The specific mechanism reaction to illustrate the methylene blue dye conditions under base, neutral and acid condition

dear colleagues, I want to set the methylene blue dye condition under the addition of NaOH and HCl so the acid, neutral and base condition have resulted. However, sometimes, it has distrubed me to...

01 January 1970 5,376 4 View