Fabrication of oxidase-like hollow MnCo2O4 nanofibers and their sensitive colorimetric detection of sulfite and L-cysteine,Inorganic Chemistry Frontiers

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Fabrication of oxidase-like hollow MnCo2O4 nanofibers and their sensitive colorimetric detection of sulfite and L-cysteine
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2017-09-20 00:00:00 , DOI: 10.1039/c7qi00458c
Mu Gao _{1,

2,

3,

4,

5} , Xiaofeng Lu _{1,

2,

3,

4,

5} , Maoqiang Chi _{1,

2,

3,

4,

5} , Sihui Chen _{1,

2,

3,

4,

5} , Ce Wang _{1,

2,

3,

4,

5}

Affiliation

Mixed transition-metal oxides (MTMOs) have attracted much research interest because of their promising applications in artificial enzymes. In this work, uniform hollow MnCo₂O₄ nanofibers have been fabricated via an electrospinning technique followed by a calcination process, which can be used as efficient oxidase mimics. In detail, the as-prepared hollow MnCo₂O₄ nanofibers display excellent oxidase-like activity toward the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) superior to their corresponding single-metal oxides without the addition of H₂O₂. Based on the high catalytic activity of hollow MnCo₂O₄ nanofibers and their inhibition effect by specific substances, the system of hollow MnCo₂O₄ nanofibers–TMB has potential to be applied in assays to detect sulfite and L-cysteine using a colorimetric approach with high sensitivity and selectivity. This work implies a broad application prospect of MTMOs in biosensors, environmental protection, food safety and medical science.

中文翻译：

氧化酶样中空MnCo ₂ O ₄纳米纤维的制备及其对亚硫酸盐和L-半胱氨酸的比色检测

混合过渡金属氧化物（MTMO）由于在人造酶中的应用前景广阔而引起了广泛的研究兴趣。在这项工作中，已经通过电纺丝技术和随后的煅烧工艺制备了均匀的中空MnCo ₂ O ₄纳米纤维，可以用作有效的氧化酶模拟物。详细地讲，所制备的中空MnCo ₂ O ₄纳米纤维对3,3'，5,5'-四甲基联苯胺（TMB）的氧化表现出优异的类似氧化酶的活性，优于其相应的单金属氧化物，而无需添加H ₂ O ₂。基于中空MnCo ₂ O ₄的高催化活性纳米纤维及其对特定物质的抑制作用，空心MnCo ₂ O ₄纳米纤维–TMB系统具有潜力，可用于通过比色法以高灵敏度和高选择性检测亚硫酸盐和L-半胱氨酸的方法。这项工作意味着MTMO在生物传感器，环境保护，食品安全和医学等领域具有广阔的应用前景。

更新日期：2017-11-08

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