Synthesis of hierarchical Co3O4@NiO core-shell nanotubes with a synergistic catalytic activity for peroxidase mimicking and colorimetric detection of dopamine.
Synthesis of hierarchical Co3O4@NiO core-shell nanotubes with a synergistic catalytic activity for peroxidase mimicking and colorimetric detection of dopamine.
复制标题
具有协同催化活性的多级Co3O4@NiO核壳纳米管的合成，用于模拟过氧化物酶和多巴胺比色检测
DOI：
10.1016/j.talanta.2018.01.019
复制
发表时间：
2018
期刊：
影响因子：
6.1
通讯作者：
Lu Xiaofeng
中科院分区：
文献类型：
--
作者：
Zhu Yun;Yang Zezhou;Chi Maoqiang;Li Meixuan;Wang Ce;Lu Xiaofeng
核-壳结构纳米催化剂由于具有高活性界面和丰富的氧化还原性质，是一种很有前途的催化剂改性方法。在这项工作中，分层Co3O4@NiO核壳纳米管的制备通过沉积NiO壳通过化学浴处理使用静电纺丝Co-C复合纳米纤维作为模板，然后在空气中煅烧过程。Co3O4@NiO核壳纳米管具有均匀的中空结构，Co 3 O 4纳米颗粒附着在NiO纳米管内壁，对H2 O2氧化3，3 ′，5，5 ′-四甲基联苯胺（TMB）具有良好的催化活性。由于协同效应，Co3O4@NiO核壳纳米管的类过氧化物酶活性远高于单独Co 3 O 4和NiO组分的活性。由于其具有上级过氧化物酶样活性，因此开发了一种简单快速的比色法，用于检测多巴胺，检测限为1.21 µM，选择性良好。可以预见，所制备的Co3O4@NiO核壳纳米管在生物医学分析和环境监测等方面具有广阔的应用前景。
Fabrication of core-shell nanostructured catalyst is a promising way for tuning its catalytic performance due to the highly active interface and rich redox properties. In this work, hierarchical Co3O4@NiO core-shell nanotubes are fabricated by the deposition of NiO shells via a chemical bath treatment using electrospun Co-C composite nanofibers as templates, followed by a calcination process in air. The as-prepared Co3O4@NiO core-shell nanotubes exhibit a uniform and novel hollow structure with Co3O4nanoparticles attached to the inner wall of NiO nanotubes and excellent catalytic activity toward the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) in the presence of H2O2. Due to the synergistic effect, the peroxidase-like activity of the Co3O4@NiO core-shell nanotubes is much higher than that of individual Co3O4and NiO components. Owing to the superior peroxidase-like activity, a simple and rapid colorimetric approach for the detection of dopamine with a detection limit of 1.21 µM and excellent selectivity has been developed. It is anticipated that the prepared Co3O4@NiO core-shell nanotubes are promising materials applied for biomedical analysis and environmental monitoring.