Pyrocatechol Violet Modified Graphite Pencil Electrode for Flow Injection Amperometric Determination of Sulfide

Chemistry An Asian Journal

Yang

Ashraf

et al. 2022

Over the past few years, the environmentally friendly synthesis of nanomaterials, including graphene using green chemistry, has attracted tremendous attention due to its easy handling, low cost, and biocompatibility. Here we demonstrate a facile and efficient green synthesis route for producing highly stable and electrochemically active threedimensional interconnected graphene frameworks (3DIGF) from jute sticks. Initially, jute sticks derived three-dimensional amorphous activated carbon nanosheets (3DAACNs) were prepared at low temperatures (i. e., 850 °C) in an inert environment. The resultant 3DAACNs were then heat treated at a high temperature (i. e., 2700 °C) under an inert environment, resulting in 3DIGF. The prepared carbonaceous materials were fully characterized, and various experimental techniques confirmed the preparation of 3DIGF. The prepared 3DIGF shows a highly stable nature in thermal and chemical environments and demonstrates a highly dynamic nature for the electrooxidation of sulfide. This study could be considered a vital contribution towards the economic and simple approach for preparing 3DIGF from biomass.

Section: Resultsmentioning

confidence: 79%

Preparation of Highly Stable and Electrochemically Active Three‐dimensional Interconnected Graphene Frameworks from Jute Sticks

Chemistry An Asian Journal

Yang

Ashraf

et al. 2022

“…Gamze et al. proposed Pcv as an effective catalyst for electro‐oxidation and FIA of sulfide [88] . A Pcv‐modified graphite pencil electrode (Pcv@GPE) was prepared via immersing the GPE in 0.01 M Pcv solution for 15 minutes.…”

Section: Sulfide Sensing Strategies In Controlled Potential Techniquesmentioning

confidence: 99%

“… CV curves of a, b) bare GPE and c, d) Pcv/GPE in the a, c) absence and b, d) presence of 0.20 mM Na 2 S in Britton–Robinson buffer solution (pH 9.0) with 0.10 M KCl at a scan rate of 50 mV s −1 . Reproduced under the terms of the CC BY‐NC 4.0 license [88] . Copyright 2020, The Authors.…”

Section: Sulfide Sensing Strategies In Controlled Potential Techniquesmentioning

confidence: 99%

“…Gamze et al proposed Pcv as an effective catalyst for electro-oxidation and FIA of sulfide. [88] A Pcv-modified graphite pencil electrode (Pcv@GPE) was prepared via immersing the GPE in 0.01 M Pcv solution for 15 minutes. The CV showed that the Pcv@GPE exhibited a good electro-catalytic performance through a shifting in the potential from + 400 at bare GPE to + 70 mV at Pcv@GPE and improvement in the peak current by comparison with the bare GPE, as shown in Figure 27.…”

Section: P E R S O N a L A C C O U N T T H E C H E M I C A L R E C O R Dmentioning

confidence: 99%

“…In another study, Nathan reported an electro-catalytic reaction with ferrocene carboxylate (FcCO 2 À ) as an electron Reproduced under the terms of the CC BY-NC 4.0 license. [88] Copyright 2020, The Authors.…”

Section: Solution-based Electron Mediator For Sulfide Sensingmentioning

confidence: 99%

See 2 more Smart Citations

Controlled‐Potential‐Based Electrochemical Sulfide Sensors: A Review

Aziz

Oyama

et al. 2020

The Chemical Record

Due to their potential applications in industry and potent toxicity to the environment, sulfides and their detection have attracted the attention of researchers. To date, a large number of controlled‐potential techniques for electrochemical sulfide sensors have been developed, thanks to their simplicity, reasonable limit of detection (LOD), and good selectivity. Different researchers have applied different strategies for developing selective and sensitive sulfide sensors. However, there has been no systematic review on controlled‐potential techniques for sulfide sensing. In light of this absence, the main aim of this review article is to summarize various strategies for detecting sulfide in different media. The efficiencies of the developed sulfide sensors for detecting sulfide in its various forms are determined, and the essential parameters, including sensing strategies, working electrodes, detection media, pH, LOD, sensitivity, and linear detection range, are emphasized in particular. Future research in this area is also recommended. It is expected that this review will act as a basis for further research on the fabrication of sulfide sensors for practical applications.

Carbon Nanofiber and Poly[2‐(methacryloyloxy) ethyl] Trimethylammonium Chloride Composite as a New Benchmark Carbon‐based Electrocatalyst for Sulfide Oxidation

Aziz

Chemistry An Asian Journal

Mazumder

et al. 2021

There is an overwhelming desire to develop new sulfide oxidation electrocatalysts that perform at low potentials and exhibit high current density for the removal and efficient sensing of sulfide. This article describes a comparative electrochemical analysis of various commercially available carbon materials and polymer/surfactant composite electrocatalysts for direct electrooxidation of sulfide in an aqueous solution. The composites were prepared from five different carbon materials multiwalled carbon nanotubes, fullerene‐C60, graphene, glassy carbon, and carbon nanofibers (CNF) and four different polymers: chitosan, polyvinylidene fluoride, Nafion, and indigenously synthesized poly[2‐(methacryloyloxy)ethyl] trimethylammonium chloride (PMTC). The carbon@polymer composites were prepared by a simple ultrasonication technique, and the electrodes were prepared by drop‐drying the prepared composite on indium tin oxide (ITO) substrates. The CNF@PMTC showed the highest positive zeta potential that allowed an accumulation of many negatively charged sulfide ions at the CNF@PMTC surface. Cyclic voltammetry was used for the electrooxidation of sulfide in an aqueous solution of tris buffer (0.05 M; pH 8.0) and KNO3 (0.1 M). The lowest sulfide oxidation peak potential (i. e., −51 mV vs. standard hydrogen electrode) with a high catalytic current response (730 μA/cm2) of the CNF@PMTC‐modified ITO electrode among the tested and previously reported carbon‐based electrode materials make it ideal for direct sulfide electrooxidation. Taking this and its simple preparation method into account, CNF@PMTC can be considered a benchmark carbon‐based electrocatalyst for sulfide oxidation.