Adsorption-Enhanced Sensitivity for Electrochemical Sensing of Diclofenac by Poly(ether sulfone)-Based Laser-Induced Graphene

IF 3.7 2区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Vikram P. Wanjari, Pawan Kumar, Siddhartha P. Duttagupta, Swatantra P. Singh
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引用次数: 0

Abstract

Emerging contaminants are a matter of growing concern for environmental and human health and safety, requiring efficient and affordable sensing platforms. Laser-induced graphene (LIG) is a novel material with a 3D porous graphene structure that can be fabricated in a simple one-step fabrication process. However, most LIG-based works in electrochemical sensors are limited to polyimide (PI)-based platforms, thus limiting the purview of properties of LIG dependent on the substrate–laser interaction. Diclofenac (DCF), a nonsteroidal anti-inflammatory drug, is an emerging contaminant in water and wastewater that threatens aquatic and terrestrial life. Furthermore, LIG-based sensors have not been used to sense DCF. In this work, we demonstrate the spontaneous adsorption behavior of LIG toward DCF without applying any external potential. This spontaneous adsorption phenomenon can enhance the sensitivity per the characteristics of the tested water samples and permissible standards to be followed. Poly(ether sulfone)-based LIG (PES-LIG) is found to be more responsive to laser irradiation than PI-LIG due to its highly porous surface and fibrous nature, imparting more electrochemical sites and adsorption area for DCF. These characteristics lead to a higher sensitivity of 0.2774 μA μM–1 toward DCF sensing for PES-LIG with a limit of detection of 0.1 μM. The sensors were applied for DCF measurement in wastewater and tap water samples with appreciable selectivity. The specific adsorption behavior of LIG toward DCF could pave the way for new pathways in emerging contaminant sensing and removal as well as for other applications.

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来源期刊
Langmuir
Langmuir 化学-材料科学:综合
CiteScore
6.50
自引率
10.30%
发文量
1464
审稿时长
2.1 months
期刊介绍: Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).
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