01966nas a2200241   4500008004100000022001400041245005800055210005800113260006900171300001200240490000800252520118600260653002701446653002001473653002001493653001601513100002301529700002301552700002201575700002101597700001801618856008801636       2011                        eng d  a0379-677900aPolyaniline modified electrodes for detection of dyes0 aPolyaniline modified electrodes for detection of dyes  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcMAY  a659-6640 v1613 a<p>Polyaniline (PANI) is one of the most extensively used conjugated polymers in the design of electrochemical sensors. In this study, we report electrochemical dye detection based on PANI for the adsorption of both anionic and cationic dyes from solution. The inherent property of PANI to adsorb dyes has been explored for the development of electrochemical detection of dye in solution. The PANI film was grown on electrode via electrochemical polymerization. The as grown PANI film could easily adsorb the dye in the electrolyte solution and form an insulating layer on the PANI coated electrode. As a result, the current intensity of the PANI film was significantly altered. Furthermore, PANI coated stainless steel (SS) electrodes show a change in the current intensity of Fe(2+)/Fe(3+) redox peaks due to the addition of dye in electrolyte solution. PANI films coated on both Pt electrodes and non-expensive SS electrodes showed the concentration of dye adsorbed is directly proportional to the current intensity or potential shift and thus can be used for the quantitative detection of textile dyes at very low concentrations. (C) 2011 Elsevier B.V. All rights reserved.</p>10aElectrochemical sensor10aEmeraldine base10aEmeraldine salt10apolyaniline1 aMahanta, Debajyoti1 aMunichandraiah, N.1 aRadhakrishnan, S.1 aMadras, Giridhar1 aPatil, Satish  uhttps://library.ncl.res.in/content/polyaniline-modified-electrodes-detection-dyes-002604nas a2200253   4500008004100000022001400041245013800055210006900193260000800262300001100270490000800281520171600289653002102005653002602026653002702052653002202079653002002101653002702121100001902148700002402167700002302191700001902214856011702233       2026                        eng d  a0921-344900aWaste-to-sensor: repurposing spent Li-ion battery graphite into reduced graphene oxide for electrochemical detection of ascorbic acid0 aWastetosensor repurposing spent Liion battery graphite into redu  cJAN  a1086100 v2253 a<p>
	Spent lithium-ion batteries (S-LIBs) are typically discarded in landfills after their lifecycle ends, despite containing valuable materials like graphite. While much research focuses on extracting precious metals from the cathode, this study explores the recycling, recovery, and reuse of spent graphite, converting it into reduced graphene oxide (rGO) for electrochemical sensing. The rGO material demonstrated excellent sensitivity to ascorbic acid (AA) in a concentration range of 1 mM to 100 mM at pH 7.6, offering a cost-effective solution for AA detection. The recovered graphite (RG) from S-LIBs and commercial graphite (CG) was first converted into graphene oxide (R-GO, C-GO) and then reduced (R-rGO, C-rGO). This material underwent extensive structural characterization using techniques such as powder X-ray diffraction (PXRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) analysis, field-emission scanning electron microscopy (FE-SEM), and high-resolution transmission electron microscopy (HR-TEM). Electrochemical performance was evaluated through cyclic voltammetry (CV), differential pulse voltammetry (DPV). This study underscores the ``waste-to-wealth'' concept and supports circular economy principles by transforming electronic waste into a valuable resource. The LOD and LOQ for both the material R-rGO and C-rGO were calculated as 3.055 mM, 10.18 mM, and 3.41 mM, 11.36 mM, respectively. The rGO-based sensor not only promotes sustainable recycling but also offers a low-cost, high-performance solution for ascorbic acid detection, with potential applications in food quality monitoring, medical diagnostics, and the cosmetic industry.</p>
10acircular economy10aClosed loop recycling10aElectrochemical sensor10aGraphite recovery10aHydrometallurgy10aSpent Li-ion batteries1 aRawat, Purnima1 aShivamurthy, B., P.1 aPatil, Vaibhav, J.1 aNayaka, G., P.  uhttps://library.ncl.res.in/content/waste-sensor-repurposing-spent-li-ion-battery-graphite-reduced-graphene-oxide