Robust Construction of Flexible Bacterial Cellulose@Ni(OH) Paper: Toward High 2 Capacitance and Sensitive H2O2 Detection

Abstract

Multifunctional properties, including energy storage and sensitive diagnosis, are highly demanded for high-performance supercapacitors and sensors. Herein, we describe a facile method for the synthesis of a multitasking bacterial cellulose@Ni(OH) paper for use as a flexible 2 supercapacitor electrode with excellent energy storage performance and a sensing platform for high-sensitivity detection of H O. Monodispersed 2 2 surfactant-free Ni(OH) particles with a large fraction of edge sites were anchored on the cellulose fiber network, providing a bendable, 2 freestanding, and hydrophilic material, and leading to attractive electrochemical properties. As expected, this flexible electrode exhibited a-2 remarkable areal capacitance of ~2047 mF cm and high flexibility allowing it to be bent to arbitrary angles. As a nonenzymatic H O detection 2 2-1 electrochemical electrode, it displayed a fast amperometric response with a linear range of 0.1-12.4 mM, acceptable sensitivity (~3.79 uA mM-2 cm), and low detection limit (~0.28 μM, S/N=3). The versatility of the electrode can be demonstrated by its high selectivity in the presence of interfering species, good reliable detection, and also its ability to detect H O in real samples. The simple, low-cost, and general strategy presented 2 2 herein can be extended to the preparation of other biomass materials and open up new opportunities for flexible electronic devices.

Fabrication of ternary MXene/MnO2/polyaniline nanostructure with good electrochemical performances

“…In order to meet the application requirements of nextgeneration portable electronic devices, it is particularly important to develop flexible, efficient, lightweight, and miniaturized energy storage systems. Compared with other energy storage devices [1][2][3][4][5], supercapacitors have become the focus due to their high charge and discharge rate, long cycle life, high power density, etc., but supercapacitors have a lower energy density [6][7][8][9][10][11]. Since electrode materials are an important factor affecting electrochemical performances, exploring new electrode materials for supercapacitors is the key to improving the properties of energy storage systems.…”

Trimethylamine functionalized radiation-induced grafted polyamide 6 fibers for p-nitrophenol adsorption

“…12 ) models were adopted. The premise underpinning the Langmuir model is that the adsorbent surface is uniform and adsorption on it constitutes a monolayer 55 . The separation factor R L was computed to assess whether monolayer adsorption and surface homogeneity were appropriate.…”

Multi-functional flexible 2D carbon nanostructured networks

“…1g bottom). Such remarkable properties, for instance, nanoscale characteristics, 2D network form, robust flexibility, and high conductivity, allow the carbon N-nets to facilitate their widespread applications ranging from filtration and separation to wearable electronic device to supercapacitor and battery [26][27][28][29][30] ; some industrial samples ( Fig. 1h, such as mask and supercapacitor), using carbon N-nets as core components, were also successfully fabricated.…”