2016
DOI: 10.1590/s1984-82502016000400023
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Application of biosynthesized ZnO nanoparticles on an electrochemical H 2 O 2 biosensor

Abstract: ZnO nanoparticles (NPs) were synthesized via a green biochemical method using Corymbia citriodora leaf extract as a reducing and stabilizing agent. The biosynthesized ZnO NPs were characterized by SEM and XRD. An electrochemical H 2 O 2 biosensor was fabricated by modification of a glassy carbon electrode using our proposed ZnO NPs. The electrochemical sensor showed excellent detection performance towards trace amounts of H 2 O 2 , demonstrating that it could potentially be used in clinical applications.Uniter… Show more

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Cited by 19 publications
(6 citation statements)
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“…As shown in the Fig. 3A , The IR spectrum of GO presents peaks at 1732, 1622, 1395 and 1049 cm −1 , which are assigned to the C = O stretching of COOH groups, C = O stretching vibration, C — OH stretching vibration and C — O vibrations from alkoxy groups 32 34 , respectively. After CV reduction, the intensity of these peaks becomes much less, indicating that the amount of oxygen-containing groups at the surface of GO is greatly reduced.…”
Section: Methodsmentioning
confidence: 95%
“…As shown in the Fig. 3A , The IR spectrum of GO presents peaks at 1732, 1622, 1395 and 1049 cm −1 , which are assigned to the C = O stretching of COOH groups, C = O stretching vibration, C — OH stretching vibration and C — O vibrations from alkoxy groups 32 34 , respectively. After CV reduction, the intensity of these peaks becomes much less, indicating that the amount of oxygen-containing groups at the surface of GO is greatly reduced.…”
Section: Methodsmentioning
confidence: 95%
“…To obtain various nanocomposites with peroxidase-like bioactivity, noble metal-based materials (Pt, Pd, Ag, Au, etc. ), [8][9][10] carbon-based composites, 11,12 metal oxide-based composites (MnO 2 , 13 ZnO, 14 Sn 3 O 4 , 15 etc. ), MOFs, 15,16 etc., have been proposed and constructed to prepare nonenzymatic H 2 O 2 sensors.…”
Section: Introductionmentioning
confidence: 99%
“…An undoped and Ce/Ni-ZnO nanoparticles PL spectra are shown in Figure 4, pure ZnO exhibits a strong UV emission at 399 nm and four weak visible emissions at 443, 465, 480 and 526 nm, respectively. The strong and narrow UV emission at 399 nm is recognized as the near band edge emission of ZnO, originating from the excitonic transitions among the electrons in the conduction bands and the holes in the valence bands [37]. However, all the ZnO and Ce/Ni-ZnO samples displayed only one in the UV region (410 nm) and the others in the visible region (545 nm), which can be attributed to the single-ionized oxygen vacancies [38].…”
Section: Photoluminescence (Pl) Analysismentioning
confidence: 99%