Fabrication of nanocomposite electrochemical sensors with poly(3,4-ethylenedioxythiophene) conductive polymer and Au nanoparticles adsorbed on carboxylated nanocrystalline cellulose

Jinshi Fan; Shaoping Liang; Mingming Zhang; Guiyun Xu

doi:10.21967/jbb.v3i1.142

Fabrication of nanocomposite electrochemical sensors with poly(3,4-ethylenedioxythiophene) conductive polymer and Au nanoparticles adsorbed on carboxylated nanocrystalline cellulose

doi: 10.21967/jbb.v3i1.142

a. College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
b. Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

基金项目:

This research was supported by the National Natural Science Foundation of China (21422504 and 21275087), the Natural Science Foundation of Shandong Province of China (JQ201406).

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出版历程

Fabrication of nanocomposite electrochemical sensors with poly(3,4-ethylenedioxythiophene) conductive polymer and Au nanoparticles adsorbed on carboxylated nanocrystalline cellulose

a. College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
b. Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

Funds:

This research was supported by the National Natural Science Foundation of China (21422504 and 21275087), the Natural Science Foundation of Shandong Province of China (JQ201406).

摘要

摘要: Au nanoparticles (AuNPs) were prepared by reducing HAuCl₄ with NaBH₄, and then adsorbed uniformly on the surface of carboxylated nanocrystalline cellulose (CNCC). The obtained AuNPs/CNCC particles were doped into a conductive polymer of poly(3,4-ethylenedioxythiophene) (PEDOT) to yield a highly conductive nanocomposite, which was deposited onto a glassy carbon electrode (GCE) by an electrochemical method. The PEDOT/AuNPs/CNCC nanocomposite showed low electrochemical impedance and good electrocatalytic activity toward ascorbic acid. Based on this novel nanocomposite material, an amperometric sensor was developed for the detection of ascorbic acid with a detection limit as low as 0.29 μM. When operated at -0.15 V, the sensor detected ascorbic acid in the range of 0.88 μM to 15000 µM.
- Carboxylated nanocrystalline cellulose /
- Au nanoparticles /
- Poly(3 /
- 4-ethylenedioxythiophene) /
- Electrochemical impedance spectroscopy /
- Amperometric sensor /
- Ascorbic acid
Abstract: Au nanoparticles (AuNPs) were prepared by reducing HAuCl₄ with NaBH₄, and then adsorbed uniformly on the surface of carboxylated nanocrystalline cellulose (CNCC). The obtained AuNPs/CNCC particles were doped into a conductive polymer of poly(3,4-ethylenedioxythiophene) (PEDOT) to yield a highly conductive nanocomposite, which was deposited onto a glassy carbon electrode (GCE) by an electrochemical method. The PEDOT/AuNPs/CNCC nanocomposite showed low electrochemical impedance and good electrocatalytic activity toward ascorbic acid. Based on this novel nanocomposite material, an amperometric sensor was developed for the detection of ascorbic acid with a detection limit as low as 0.29 μM. When operated at -0.15 V, the sensor detected ascorbic acid in the range of 0.88 μM to 15000 µM.
- Carboxylated nanocrystalline cellulose /
- Au nanoparticles /
- Poly(3 /
- 4-ethylenedioxythiophene) /
- Electrochemical impedance spectroscopy /
- Amperometric sensor /
- Ascorbic acid