Popcorn‐Derived Porous Carbon Based Electrochemical Sensor for Simultaneous Determination of Hydroquinone, Catechol and Nitrite

Abstract

In this study, popcorn‐derived microporous carbon (PPC) was prepared by pyrolysis method under KOH activation, which was used as an electrochemical sensor material for simultaneous detection of hydroquinone (HQ), catechol (CC), and nitrite (NT). The prepared PPC/GCE exhibited highly electrocatalytic activity to the oxidation of HQ, CC and nitrite. The oxidation peaks for HQ (111 mV), CC (216 mV), and NT (854 mV) were well separated under the optimized conditions. The PPC/GCE showed a wide linear range of 3.0–700 μM, 3.0–500 μM and 5.0–10000 μM for HQ, CC and NT with detection limits of 1.45 μM, 0.49 μM and 1.5 μM, respectively. The KOH‐activated PPC is a promising electrode material for fabricating selective and sensitive electrochemical sensors.

Simultaneous Electrochemical Determination of Hydroquinone and Catechol by Lignocellulose Biopolymers Derived Porous Carbon

“…For both HC/GCE and LC/GCE, pH 7.0 seems to be suitable to obtain the higher current responses toward both HQ and CC. This tendency is in accordance with other biomass‐derived carbons‐modified electrodes using lotus stem‐derived porous carbon, [20] popcorn‐derived porous carbon, [50] date stone‐derived activated carbon, [54] Perilla frutescens ‐derived activated carbon [51] . As noted in above section, the present WBM‐PCs have nitrogen and oxygen atoms (Figure S1, S2, and Figure 2C, 2F).…”

“…Since KOH has been widely used as an activation agent to make porous structure of activated carbon materials, [37,[50][51][52] we employed KOH for the activation in the pyrolysis of hemicellulose and lignin. The activation process of carbonaceous matrix by KOH is relatively complex, and the main reaction schemes are shown in supplementary information.…”

Fluorine-Free Sustainable Three-Dimensional Superhydrophobic and Superoleophilic Robust Foam for Efficient Oil/Water Separation

“…Moreover, biowaste is also a source of carbon element . By deriving carbonaceous materials from biowaste, it is possible to simplify the process and switch to renewable and environmental-friendly materials. , Chemical activation of biowaste using materials like KOH, saturated urea, H 2 SO 4 dehydration, NaOH, etc., is employed to synthesize graphene. − Graphene was synthesized from waste loofah and utilized as an electrode for energy devices . Moreover, graphene-like porous carbon nanosheets were synthesized from waste pomelo peel for microwave adsorption …”