Multifunctional Porous Nanohybrid Based on Graphene-Like Tungsten Disulfide on Poly(3,4-ethoxylenedioxythiophene) for Supercapacitor and Electrochemical Nanosensing of Quercetin

Abstract

A multifunctional porous nanohybrid was designed for supercapacitor and nanosensor for voltammetric detection of Chinese traditional herbal drug quercetin (Qu) extracted from lotus leaves using graphene-like tungsten disulfide (WS2) nanosheet onto a porous and conductive poly(3,4-ethoxylenedioxythiophene) (PEDOT). Conducting PEDOT with a rough, porous, irregular surface was synthesized by one-step electropolymerization of commercially available monomer in acetonitrile solution, then WS2/PEDOT was facilely obtained by drop-coating WS2 nanosheet dispersion onto the synthesized PEDOT. WS2/PEDOT porous nanohybrid displayed a high capacitance characteristic with specific capacitance of 70.64 F·g−1 at a current density of 0.2 A·g−1, good cycling stability with capacitance retention of 90.74% after 5000 cycles and excellent voltammetric responses for Qu in linear ranges from 1.5 × 10−7 to 1 × 10−4 mol l−1 with a limit of detection (LOD) of 50 nM and sensitivity of 1.76 μA μm−1 cm−2 under the optimum operation conditions. The developed nanohybrid sensor was employed for the electrochemical detection of Qu in real sample with acceptable recoveries in comparison with high-performance liquid chromatography. This work will provide an experimental basis for nanosensing platform integrated with supercapacitor as self-powered electrochemical energy storage system in the near future.

Recent developments in conducting polymers: applications for electrochemistry

“…Researchers have also thoroughly investigated conducting polymers like PANI, PPy, PThs, and their derivatives because of the encouraging electrical conductivity and electro-activity. [96][97][98] Although experts in the eld have found it necessary to the design of the nanostructured poly(3,4 ethylene-dioxythiophene) (PEDOT) with increased capacitance and mechanical exibility to realize the high-performance supercapacitors, it is hard to make these types of electrodes with fast and affordable methods. Therefore, Wang et al introduced a simplied, rapid, and exible approach to making the mechanically powerful, strongly conductive, and versatile nanostructured PEDOT paper.…”

Pressure Dependence of Structural and Mechanical Properties of Single-Crystal Tungsten: A Molecular Dynamics Study

“…Tungsten (W) is a body-centered cubic (BCC) rare metal (structured in Im3m), and it has the highest melting point (3680 K) of all the known elements [1]. Due to the advantages of its high melting point, high heat conductivity, high sputtering resistance, and superior mechanical strength [1][2][3], W and its alloys have wide application potential in aerospace, electronics, and chemical and national defense military industries [4][5][6]. Notably, tungsten is considered to be one of the most likely candidates for plasma-facing material to be used in future nuclear fusion reactors and for target material in spallation facilities due to its outstanding comprehensive advantages [7][8][9][10].…”

Layered tungsten-based composites and their pseudocapacitive and electrocatalytic performance

“…After 10 000 cycles, the WS_600 electrode retained 82% of its initial specific capacitance. The specific capacitance of WS_600 is superior to the recently reported tungsten-based supercapacitors 26–32 (Table S2, ESI†). Overall, the WS_600 electrode possessed the optimal specific capacitance, improved rate capability and cyclic performance, against the WS_400 and WS_800 electrodes.…”