Abstract

Development of ZnO@rGO based nonenzymatic urea and glucose sensors.

Highlights

  • Urea is the most widely used fertilizer, and its production and consumption in India are about 23 and 31 million tonnes

  • ZnO nanoarchitectures with various morphologies were prepared using carbohydrate/cellulose as a bio-template

  • The as-prepared ZnO nanoarchitectures were used to decorate rGO sheets, which results in a ZnO@rGO nanocomposite

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Summary

Introduction

Urea is the most widely used fertilizer, and its production and consumption in India are about 23 and 31 million tonnes. A quantum of research studies has been conducted to develop an efficient and reliable method for urea and glucose sensing. Different methods are reported for the preparation of rGO from GO. ZnO nanoarchitectures with varied morphology were prepared via the biotemplate assisted microwave method. ZnO nanoarchitectures prepared with different biotemplates are attached on rGO via the microwave assisted ex situ technique, which results in ZnO@rGO nanocomposites. The as-prepared ZnO@rGO has been used for the nonenzymatic sensing of urea and glucose. Since the studies on nonenzymatic ZnO based glucose and urea sensors are rarely reported, the fabrication and performance of ZnO@rGO based sensors are important. The synergistic effect of both ZnO and rGO provides excellent sensing characteristics in the as-prepared nonenzymatic sensor

Materials
Preparation of GO
Preparation of rGO via nascent hydrogen chemical reduction
Synthesis of ZnO nanoarchitectures via the biotemplate method
Characterization
Fabrication of the nonenzymatic electrochemical sensor electrodes
Electrochemical studies
Characterization of rGO prepared via Zn mediated nascent hydrogen reduction
Conclusions

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