Hazel Anne Cledera

10 Questions 4 Answers 0 Followers

Questions related from Hazel Anne Cledera

How to determine the acceptable amount of DMF when synthesizing MOFs?

I have synthesized MOFs already. However, I need to scale it up to produce 100g of MOFs. During my calculation, I need 15L of DMF just for this synthesis! So I thought, maybe DMF is just used as a...

02 July 2024 1,880 1 View

Is it normal to wash metal-organic frameworks with DI water for a week?

I have synthesized MOFs and been washing for about 2 weeks now until I reach the goal of UV absorbance of near 0.

28 May 2024 2,145 0 View

How do you wash the modified biochar?

I usually wash it with MeOH by stirring (10 min.) then centrifuge at 8000rpm (10 min.) followed by DI water washing by stirring (10 min.) and then centrifuge again. I do it for 3x. The final one...

13 May 2024 8,778 0 View

GF/F Filter or Syringe Filter? Which one do you use to extract the filtrate before subjecting it to UV-VIS?

After cleaning your biochar, do you use filtration using GF/F filter or do you use syringe to extract the filtrate and put it on cuvette and subject it to UV-VIS? Thank you!

30 March 2024 7,867 1 View

How do you determine the right UV-Vis wavelength for your sample?

I am cleaning biochar with DI water. For me to prove that my biochar is already clean, I subject it to UV-Vis at 254 nm. Sometimes 274nm, 284nm. The result should be 0.00. But my prof said I...

20 March 2024 6,407 2 View

Why does biochar cleaning with DI water takes so long?

I have been cleaning my biochar for 4 days now! It's hard to make it 0.00 adsorbance in the UV-vis. Worse, it was at 0.019 already before but after cleaning again it became 0.038! I do not know...

10 March 2024 6,521 2 View

Is there a difference if you use a heavy industrial CAT pump and a Micropump for the same pressure?

I asked because usually when I work with membranes, pre-compaction time is around 30-min to 1 hour and the membrane will become stable. I used DI water first and pristine membrane as the baseline....

23 February 2024 5,180 0 View

I want to ask about salt rejection test for membranes. How long is the ideal duration (24 hrs)? Also the sampling time (every 10 min.)?

For salt rejection tests, the only thing that matters is the initial conductivity and final conductivity. However, I am having a hard time figuring out how to properly conduct this test. Some...

25 May 2023 3,294 0 View

Normally, what is the Polysulfone Membrane thickness?

I am curious about PSF membrane thickness range since I want to have a membrane that can withstand high pressures. Thank you in advance for your answers!

12 October 2022 971 4 View

Interfacial Polymerization on already a Commercial PA Membrane

Hello, dear, Researchers, I am a newbie in this membrane field.' I would like to ask if anyone of you has tried doing this? Can you share some methods / paper? Thank you very much!!!

01 January 1970 1,798 2 View