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Materials 2016, 9(4), 282;

Sol-Gel Synthesis of Carbon Xerogel-ZnO Composite for Detection of Catechol

Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China
State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editor: Javier Narciso
Received: 19 February 2016 / Revised: 6 April 2016 / Accepted: 8 April 2016 / Published: 12 April 2016
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Carbon xerogel-zinc oxide (CXZnO) composites were synthesized by a simple method of sol-gel condensation polymerization of formaldehyde and resorcinol solution containing zinc salt followed by drying and thermal treatment. ZnO nanoparticles were observed to be evenly dispersed on the surfaces of the carbon xerogel microspheres. The as-prepared CXZnO composites were mixed with laccase (Lac) and Nafion to obtain a mixture solution, which was further modified on an electrode surface to construct a novel biosensing platform. Finally, the prepared electrochemical biosensor was employed to detect the environmental pollutant, catechol. The analysis result was satisfactory, the sensor showed excellent electrocatalysis towards catechol with high sensitivity (31.2 µA·mM−1), a low detection limit (2.17 µM), and a wide linear range (6.91–453 µM). Moreover, the biosensor also displayed favorable repeatability, reproducibility, selectivity, and stability besides being successfully used in the trace detection of catechol existing in lake water environments. View Full-Text
Keywords: carbon xerogel; ZnO; laccase; phenolic biosensor carbon xerogel; ZnO; laccase; phenolic biosensor

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Li, D.; Zang, J.; Zhang, J.; Ao, K.; Wang, Q.; Dong, Q.; Wei, Q. Sol-Gel Synthesis of Carbon Xerogel-ZnO Composite for Detection of Catechol. Materials 2016, 9, 282.

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