Hard template synthesis of 2D porous Co 3 O 4 nanosheets with graphene oxide for H 2 O 2 sensing
Source abstract
Abstract
Abstract In this work, we used graphene oxide (GO) as a template that was removed by calcination to finally successfully prepare Co 3 O 4 with 2D porous nanostructure. The results show that 2D porous structure Co 3 O 4 nanosheets were only prepared at pH = 2. After electrochemical tests, the as-prepared Co 3 O 4 nanosheets showed electrochemical properties that are highly suitable for H 2 O 2 detection, such as high current response, short response time (less than 3 s), wide linear range (0.388–44.156 mM), low limit of detection (2.33 μ M) and high sensitivity (0.0891 mA mM −1 cm −2 ). These excellent properties are mainly due to GO, as a 2D template, which connects Co 3 O 4 nanoparticles to each other on a 2D plane, preventing the agglomeration of Co 3 O 4 nanoparticles. The abundant pores between Co 3 O 4 nanoparticles can greatly increase the reaction between the nanoparticles and H 2 O 2 molecules.
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Research context
OpenAlex topics: Electrochemical sensors and biosensors · Electrochemical Analysis and Applications · Conducting polymers and applications
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