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Morphology of hydrothermally synthesized ZnO nanoparticles tethered to carbon nanotubes affects electrocatalytic activity for H2O2 detection.
Wayu, Mulugeta B; Spidle, Ryan T; Devkota, Tuphan; Deb, Anup K; Delong, Robert K; Ghosh, Kartik C; Wanekaya, Adam K; Chusuei, Charles C.
Afiliación
  • Wayu MB; Chemistry Department, Middle Tennessee State University, Murfreesboro, TN 37132, United States.
  • Spidle RT; Chemistry Department, Missouri State University, Springfield, MO 65897, United States.
  • Devkota T; Chemistry Department, Middle Tennessee State University, Murfreesboro, TN 37132, United States.
  • Deb AK; Chemistry Department, Middle Tennessee State University, Murfreesboro, TN 37132, United States.
  • Delong RK; Biomedical Science Department, Missouri State University, Springfield, MO 65897, United States.
  • Ghosh KC; Physics, Astronomy and Materials Science Department, Missouri State University, Springfield, MO 65897, United States.
  • Wanekaya AK; Chemistry Department, Missouri State University, Springfield, MO 65897, United States.
  • Chusuei CC; Chemistry Department, Middle Tennessee State University, Murfreesboro, TN 37132, United States.
Electrochim Acta ; 97: 99-104, 2013 May 01.
Article en En | MEDLINE | ID: mdl-25684785
We describe the synthesis of zinc oxide (ZnO) nanoparticles and demonstrate their attachment to multiwalled carbon tubes, resulting in a composite with a unique synergistic effect. Morphology and size of ZnO nanostructures were controlled using hydrothermal synthesis, varying the hydrothermal treatment temperature, prior to attachment to carboxylic acid functionalized multi-walled carbon nanotubes for sensing applications. A strong dependence of electrocatalytic activity on nanosized ZnO shape was shown. High activity for H2O2 reduction was achieved when nanocomposite precursors with a roughly semi-spherical morphology (no needle-like particles present) formed at 90 °C. A 2.4-fold increase in cyclic voltammetry current accompanied by decrease in overpotential from the composites made from the nanosized, needle-like-free ZnO shapes was observed as compared to those composites produced from needle-like shaped ZnO. Electrocatalytic activity varied with pH, maximizing at pH 7.4. A stable, linear response for H2O2 concentrations was observed in the 1-20 mM concentration range.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Diagnostic_studies Idioma: En Revista: Electrochim Acta Año: 2013 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Diagnostic_studies Idioma: En Revista: Electrochim Acta Año: 2013 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos