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García-Salinas, M.J. and Ariza, M.J. (2019) Optimizing a Simple Natural Dye Production Method for Dye-Sensitized Solar Cells: Examples for Betalain (Bougainvillea and Beetroot Extracts) and Anthocyanin Dyes. Applied Sciences, 9, Article 2515.
https://doi.org/10.3390/app9122515

has been cited by the following article:

• TITLE: Adsorption Behavior of Dye Extract from Justicia carnea Leaf on Cotton Fabric

  AUTHORS: Innocent Ochiagha Eze, Onyekachi Onyinyechi Nnorom, Chima Kenneth Oguzie, Chinedu Nwapa, Kate Oluchi Chike

  KEYWORDS: Justicia carnea Leaf, Adsorption Kinetic, Dyeing, Mordant

  JOURNAL NAME: Journal of Surface Engineered Materials and Advanced Technology, Vol.16 No.2, April 30, 2026

  ABSTRACT: The adsorption behavior of dye extracted from Justicia carnea using aqueous method was studied. The dye extract was used to dye cotton fabric treated with a mordant and cotton fabric without mordant. Dyeing was done at 50˚C, 60˚C and 70˚C with Aluminium Potasium Sulphate as mordant. The effluent after dyeing was characterized using FTIR and UV-VIS spectrophotometer. The result of the UV-VIS spectrophotometer confirmed the presence of emodin, a flavonoid in the dye extract. Dye uptake was found to be higher at all temperatures for fabrics without mordant. The adsorption studies showed that the adsorption mechanism fits the pseudo-second order kinetic model with the R2 of 0.99. The results also showed that dyeing at 60˚C favours dyeing of cotton fabric without mordant while dyeing at 50˚C favours dyeing with pre-mordanted cotton fabric.