Conversion of waste eggshell into difunctional Au/CaCO3 nanocomposite for 4-Nitrophenol electrochemical detection and catalytic reduction
Conversion of waste eggshell into difunctional Au/CaCO3 nanocomposite for 4-Nitrophenol electrochemical detection and catalytic reduction
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DOI：
10.1016/j.apsusc.2020.145526
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发表时间：
2020-04-30
影响因子：
6.7
通讯作者：
Yang, Da-Peng
中科院分区：
文献类型：
--
作者：
Ding, Qi;Kang, Zewen;Yang, Da-Peng
蛋壳可再生，储量丰富，经济实惠。将废弃的蛋壳转化为各种有价值的功能材料，具有巨大的商业潜力。本文描述了一种经济环保的转化策略，用于合成金纳米颗粒包覆的鸡壳复合材料（定义为Au/CaCO3纳米复合材料），该复合材料可进一步用作高效检测和处理4-硝基苯酚（4-NP）的传感器和催化剂。与裸电极相比，所制备的Au/CaCO3纳米复合材料具有显著的电化学增强性能。线性响应范围宽，0.1 ~ 100 μ M，检出限较低，为0。得到54 nM。同时，该纳米复合材料还可以作为4-NP高效还原的催化剂，具有优异的活性和稳定性。催化体系符合准一级动力学模型，K值为1.0750 min（-1）。我们的“废为宝”化策略不仅为蛋壳综合利用成为有价值的功能材料提供了一种实用、低成本的方法，也为有机污染物的灵敏检测和快速清除提供了新的方向。
Eggshell is renewable, abundantly available and economic. It holds great business potentials if eggshell as waste can be converted into valuable functional materials for various applications. Herein, we describe an economic and environmental-friendly transforming strategy for the synthesis of Au nanoparticles coated chicken eggshell composites (defined as Au/CaCO3 nanocomposite), which can be further used as a sensor and catalyst for the efficient detection and treatment of 4-Nitrophenol (4-NP). The prepared Au/CaCO3 nanocomposite achieved a significant electrochemical enhancement behavior compared with naked electrode. A wide linear response range of 0.1-100 mu M and a relatively low detection limit of 0. 54 nM were obtained. Meanwhile, the nanocomposite can also be used as catalyst for the efficient reduction of 4-NP with outstanding activity and stability. The catalytic system followed the pseudo first-order kinetic model with the K value of 1.0750 min(-1). Our "waste into treasure" turning strategy not only provides a practical and low-cost method for the comprehensive utilization of eggshell into value functional materials, but also provides a new direction for the sensitive detection and rapid deletion of organic pollutants.