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- Title
Self-template synthesis of flower-like hierarchical graphene/copper oxide@copper(II) metal-organic framework composite for the voltammetric determination of caffeic acid.
- Authors
Tu, Xiaolong; Xie, Yu; Gao, Feng; Ma, Xue; Lin, Xinchen; Huang, Xigen; Qu, Fengli; Ping, Li; Yu, Yongfang; Lu, Limin
- Abstract
Flower-like graphene/CuO@Cu-BTC (GR/CuO@Cu-BTC) composite was employed as electrode material for the voltammetric determination of caffeic acid (CA) in the wine. The composite material was prepared via the self-template method. In this synthetic process, budlike CuO not only acts as the template, but also provides Cu2+ ions for in situ growth of the Cu-BTC shell. The utilization of GR as petal greatly boosts the stability and electronic conductivity of CuO@Cu-BTC. The GR/CuO@Cu-BTC composite possesses unique structural features with high specific surface area and good conductivity, exhibiting excellent electrocatalytic activity towards the oxidation of CA. Under optimized conditions, the sensor shows a good linear response to CA concentration over the range 0.020–10.0 μM, together with a low limit of detection (LOD) of 7.0 nM. Selectivity, reproducibility, and stability were investigated, and the method has been applied for the determination of CA in wine samples.
- Subjects
CAFFEIC acid; METAL-organic frameworks; COMPOSITE materials; GRAPHENE; DETECTION limit; GRAPHENE synthesis
- Publication
Microchimica Acta, 2020, Vol 187, Issue 5, p1
- ISSN
0026-3672
- Publication type
Article
- DOI
10.1007/s00604-020-04238-2