Synthesis of Co(3)O(4) Nanoplates by Thermal Decomposition for the Colorimetric Detection of Dopamine.
Synthesis of Co(3)O(4) Nanoplates by Thermal Decomposition for the Colorimetric Detection of Dopamine.
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热分解合成 Co3O4 纳米片用于比色检测多巴胺
DOI：
10.3390/nano12172990
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发表时间：
2022-08-29
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影响因子：
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具有类酶活性的无机纳米材料因其成本低、稳定性好、储存方便、制备简单等优点而备受关注。本文首次报道了在不同温度下用氢氧化钴热处理制备出纳米结构均匀的Co 3 O 4纳米片，并研究了热处理温度对模拟酶性能的影响。结果表明，在200 °C退火温度下制备的Co 3 O 4纳米片具有较强的氧化酶活性，在不添加过氧化氢的情况下，可有效催化3，3 ′，5，5 ′-四甲基联苯胺（TMB）氧化生成蓝色产物ox-TMB。一旦退火温度提高到500 ℃和800 ℃，Co 3 O 4的氧化酶活性迅速下降，甚至失活。这可能是由于在200 °C下退火的Co 3 O 4具有较大的比表面积。此外，基于TMB-Co 3 O 4纳米片体系，建立了多巴胺的比色分析方法，在1.6 μmol/L ~ 20 μmol/L的线性范围内，检测限为0.82 μmol/L。
Inorganic nanomaterials with enzyme-like activity have been attracting much attention due to their low cost, favorable stability, convenient storage, and simple preparation. Herein, Co3O4 nanoplates with a uniform nanostructure were prepared by the thermolysis of cobalt hydroxide at different temperatures, and the influence of the annealing temperature on the performance of the mimetic enzyme also was reported for the first time. The results demonstrated that Co3O4 nanoplates obtained at an annealing temperature of 200 °C possessed strong oxidase activity and efficiently catalyzed the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) without the addition of hydrogen peroxide to generate the blue color product ox-TMB. Once the annealing temperature was increased to 500 °C and 800 °C, the oxidase activity of Co3O4 decreased rapidly, and was even inactivated. This might be attributed to the relatively large specific surface area of Co3O4 annealed at 200 °C. Besides this, based on the TMB-Co3O4 nanoplate system, a colorimetric analysis method was developed to detect dopamine with a limit of 0.82 μmol/L in a linear range from 1.6 μmol/L to 20 μmol/L.
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DOI：
10.3390/nano8040194
发表时间：
2018-03-27
期刊：
Nanomaterials (Basel, Switzerland)
影响因子：
--
作者：
He Q;Liu J;Liu X;Li G;Chen D;Deng P;Liang J
通讯作者：
Liang J
影响因子：
7.4
作者：
Liu, Xixia;He, Fan;Liu, Juewen
通讯作者：
Liu, Juewen
影响因子：
12.6
作者：
Liu, Xuan;Yan, Lu;Liu, Aihua
通讯作者：
Liu, Aihua
影响因子：
5.7
作者：
Chi, Hui;Cui, Xiaoqian;Huan, Yanfu
通讯作者：
Huan, Yanfu
影响因子：
15.1
作者：
Huang, Lunjie;Zhang, Wentao;Wang, Jianlong
通讯作者：
Wang, Jianlong