Development of a semigraphitic sulfur-doped ordered mesoporous carbon material for electroanalytical applications

Abstract

The modification of traditional electrodes with mesoporous carbons is a promising strategy to produce high performance electrodes for electrochemical sensing. The high surface area of mesoporous carbons provides a large number of electroactive sites for binding analytes. Controlling the pore size and structure of mesoporous carbons and modifying their electronic properties via doping offers additional benefits like maximizing transport and tuning the electrochemical processes associated with analyte detection. This work reports a facile method to produce sulfur-doped ordered mesoporous carbon materials (S-OMC) with uniform pore structure, large pore volume, high surface area and semigraphitic structure. The synthesis used thiophenol as a single source of carbon and sulfur, and iron as a catalyst for low temperature carbonization. The S-OMC material was deposited on a glassy carbon electrode and used as a sensor with high sensitivity (11.7 A L mol−1) and selectivity for chloramphenicol detection in presence of other antibiotics. As a proof-of-concept, the sensor was applied to the direct analysis of the drug in reconstituted powdered milk and in commercial eye drops.

Doping strategy, properties and application of heteroatom-doped ordered mesoporous carbon

“…After drying at 70 °C, the samples were carbonized at 600 or 900 °C for 7 h under the protection of argon. 55 Wu et al ground the pristine OMC with melamine at a mass ratio of 1 : 1.5, followed by mixing with 20 mL of methanol solution and evaporating to obtain powder mixture. After pyrolysis at 500–900 °C, the N-doped OMC was obtained.…”

Mesoporous titania–ceria mixed oxide (MTCMO): a highly efficient and reusable heterogeneous nanocatalyst for one-pot synthesis of β-phosphonomalonates via a cascade Knoevenagel–phospha-Michael addition reaction

“…Mesoporous materials with high BET surface area have been investigated in various applications such as adsorption [3], removal of pollutant ions [4], electronics [5], photocatalysis [6], energy storage [7] and energy conversion [8]. Furthermore, mesoporous materials are used in a broad spectrum of organic transformations such as oxidation reactions [9][10][11][12], hydrogenation reactions [13], ring-opening [14], coupling reactions [15][16][17][18], acid-base reactions such as Friedel-Crafts reaction [19], esterification [20] and transesterification reactions [21].…”

Nitrogen-Dopped Ordered Mesoporous Carbon Anchored Pd Nanoparticles for Solvent Free Selective Oxidation of Benzyl Alcohol to Benzaldehyde by Using O2

“…In comparison with ordinary mesoporous carbon materials, the pore size distribution of ordered mesoporous carbons (OMCs) is uniform, and the channel arrangement is regular (Luo et al, 2016; Wang and Zhao, 2019). In this case, the interaction with analytes can be maximized, and fast mass transport can be ensured (Walcarius, 2012; Maluta et al, 2018). These unique properties lead to numerous possible applications in the field of separation, adsorption, electrochemistry and catalysis (Wang et al, 2016, 2018; Libbrecht et al, 2017; Liu et al, 2017; Xiao et al, 2017b; Chen et al, 2018; Gao et al, 2018; Xu et al, 2019; Zhu et al, 2019).…”