Size controllable preparation of gold nanoparticles loading on graphene sheets@cerium oxide nanocomposites modified gold electrode for nonenzymatic hydrogen peroxide detection

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• 作者：Xin Yang^a ; ^b ; ^cAuthor Vitae ; Yuejun Ouyang^b ; ^c ; Author Vitae ; Feng Wu^b ; ^cAuthor Vitae ; Yangjian Hu^b ; ^cAuthor Vitae ; Yang Ji^bAuthor Vitae ; Zhaoyang Wu^a ; ^{zywu@hnu.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Size controllable ; Gold nanoparticles ; Graphene sheet@cerium oxide ; Hydrogen peroxide ; Gold electrode
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：238
• 期：Complete
• 页码：40-47
• 全文大小：3273 K

文摘

An electrochemical sensor for nonenzymatic hydrogen peroxide (H₂O₂) detecting based on size controllable preparation of gold nanoparticles (Au) loading on graphene sheets@cerium oxide (GS@CeO₂) nanocomposites modified gold electrode (GE) was fabricated. The GS@CeO₂ nanocomposites were prepared via a facile solvothermal process. Different sizes of Au were controllably prepared and homogenously loaded on the surface of GS@CeO₂ nanocomposites modified GE using a simple electroless plating method. X-ray powder diffractometer (XRD) combines with Fourier transform infrared spectrum (FTIR) were used to characterize the composition of GS@CeO₂ nanocomposites. Electrochemical impedance spectroscopy (EIS) was utilized to study the interfacial properties as well as Field emission scanning electron microscopy (FESEM) was employed to characterize the morphologies of different electrodes. The electrochemical properties of electrochemical sensor were investigated by cyclic voltammetry (CV) and i-t curve methods. After all experimental parameters were optimized, the GS@CeO₂/Au hybrid nanomaterials modified GE (GE ǀ GS@CeO₂/Au) showed a good performance towards the electrocatalytic reduction of H₂O₂. A wide linear detection range (LDR) of CV peaks from 1.0 × 10⁻³ mM to 10.0 mM (R² = 0.9990) and a low limit of detection (LOD) of 2.6 × 10⁻⁴ mM (S/N = 3) was achieved. The proposed electrochemical sensor was quick, selective, sensitive, simple, stable and reliable to quantitative determination of trace H₂O₂ in contact lens care solutions.