Good day everyone. I used onion peel extract as the reducing agent to produce Chromium nanoparticles(precursor 1mM ofCrCl3 solution). 10ml of onion peel extract was added drop wise into the 100ml of chromium chloride solution. Changing of color for the solution was observed clearly. The problem is when send it to the SEM analysis, the particles size are between 300nm to 400nm, which out of range to be nanoparticles. Can I know what procedures that I could improve so that I can get within 1 to 100nm for the particle size? Other than the size, the particles are well poly dispersed with spherical shape.
- Concentrate your extract
- Increase temperature
- Change initial pH
The nanomaterials size affected by the synthesis technique, like electrodeposition; current density, potential, pH, concentrations and additives can change the grain size. Look out for those parameters
Adjust pH, Control Temperature, use higher concentration of extract and mostly use higher purity of extract to avoid particle size variation.
Good day everyone out there. I have tried to run my nanoparticle solutions with XRD, but it does not work as there are no any peaks. Any ways that I can change my silver nanoparticle solution into powder form? Is it freeze drying a valid method to do so?
many conditions can change the nanoparticle size:
In the above paper, concentration of precursors and drying route can do it.
https://www.researchgate.net/publication/325600885_Supercritical_CO2_drying_of_alginatezinc_hydrogels_A_green_and_facile_route_to_prepare_ZnO_foam_structures_and_ZnO_nanoparticles
hello,
I wonder if someone has some XAS (XANES) data on chromium nanoparticles?
Best regards
Moulay
Dear Yap Yu Hon, if you have access to a nanosecond/picosecond pulsed laser, a Cr metal plate and a solvent such as alcohol or acetone, try laser ablation synthesis in solution (or laser ablation in liquid). It is really easy, you can find here some basics to start up your laser synthesis experiment:
- https://pubs.rsc.org/en/content/articlelanding/2012/cp/c2cp42895d/unauth#!divAbstract
- https://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=41087
best regards
Vincenzo
- Badges
- Science topic
- Similar topics
- Chemistry
- Nanotechnology
- Nano