In situ reduction of the Cu/Cu₂O/carbon spheres composite for enzymaticless glucose sensors

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• 作者：Haoyong Yin^aAuthor Vitae ; Zhenzhen Cui^aAuthor Vitae ; Ling Wang^bAuthor Vitae ; Qiul Nie^a ; ^{ny136@hdu.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Cu/Cu2O ; Carbon sphere ; In situ reduction ; Glucose sensor
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：222
• 期：Complete
• 页码：1018-1023
• 全文大小：1803 K

文摘

The Cu/Cu₂O nanoclusters deposited carbon spheres have been synthesized through a layer by layer assembly method and subsequently in situ self reduction process, during which the deposited CuO served as the precursor of Cu/Cu₂O nanoclusters and carbon sphere as the reducing agent and high specific surface substrate. XRD, SEM and TEM were employed to characterize the crystal structure and morphology of the as-prepared samples. The results showed that the Cu/Cu₂O nanoclusters are homogeneously anchored onto the carbon spheres and the phase composition can be changed by altering the numbers of the assembly layers. The double shelled Cu/Cu₂O/CSs showed remarkable electrocatalytic activity toward glucose oxidation including two linear range (10–690 μM and 1190–3690 μM) with high selectivity of 63.8 and 22.6 μA mM⁻¹ cm⁻² respectively, as well as good stability and repeatability. More importantly, the interference from the commonly interfering species such as l-valine, urea, l-proline, NaCl and l-lysine can be effectively avoided. All these results indicated this novel nanostructured material might be a promising candidate for non-enzymatic glucose sensors.