Quantification of nickel, cobalt, and manganese concentration using ultraviolet-visible spectroscopy

Abstract

Ultraviolet-visible spectroscopy is one of the most effective, inexpensive, flexible, and simplest analytical techniques to measure species concentration in the liquid phase.

Fabrication of graphitized carbon fibers from fusible lignin and their application in supercapacitors

“…3). Additionally, the deposited Ni ions can be a graphitic catalyst in subsequent carbonization (Malik et al, 2021).…”

Modifier-free gold nanoparticle colorimetric sensing for detecting sulfanilamide in the presence of dopamine

“…The absorbance ( A ) is proportional to the molecular concentration ( C ) as illustrated by the Beer–Lambert law: 42 where T is the transmission, I 0 and I are the intensity of the measuring beam before and after passing through the sample; ε is the molar absorptivity, and l is the path length of the light traveling through the sample.…”

Reagent-adaptive active site switching on the IrOx/Ni(OH)2 catalyst

“…3(b)), a potential for oxidizing Ni 2+ to Ni 3+ , and continuously red shifts to 680 nm at 1.45 V, corresponding to the higher-valence Ni d+ (d 4 3). 19 In the UV-Vis absorption spectra of the IrO x /Ni(OH) 2 electrode during the OER (Fig. 3(c)), the Ir 4+ species with the absorption peak at 470 nm occurred at 1.2 V 11,20 and vanished at 1.35 V when the Ir 5+ species with the absorption peak at 520 nm was formed.…”