Fe3+-Doped Aminated Lignin as Peroxidase-Mimicking Nanozymes for Rapid and Durable Colorimetric Detection of H2O2,ACS Sustainable Chemistry & Engineering

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Fe3+-Doped Aminated Lignin as Peroxidase-Mimicking Nanozymes for Rapid and Durable Colorimetric Detection of H2O2
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-09-16 , DOI: 10.1021/acssuschemeng.1c03357
Lijun Li ₁ , Xin Liu ₁ , Ruonan Zhu ₁ , Bo Wang ₁ , Jun Yang ₁ , Feng Xu ₁ , Shri Ramaswamy ₂ , Xueming Zhang ₁

Affiliation

Nanozymes have developed rapidly as substitutes for natural enzymes. However, the toxic synthesis and the use of expensive materials seriously restrict their large-scale applications. To solve these issues, Fe³⁺-doped aminated lignin (Fe-AL) peroxidase-mimicking nanozymes were innovatively synthesized. The active center FeN_x was introduced to alkali lignin by amination via Mannich or epoxidation methods before Fe³⁺-doping. The Fe-AL nanozymes could achieve accurate colorimetric detection of H₂O₂ in 10–100 mM and could be reused over 30 times with only a negligible decrease in catalytic activity. Besides, the color-developing systems could even maintain the blue color over 72 h, which showed great promise in designing cheap and portable H₂O₂ sensors. This work not only can promote the development of lignin-based nanomaterials but also provide a new way for the synthesis of nanozymes from natural macromolecules.

中文翻译：

Fe3+-掺杂的胺化木质素作为过氧化物酶模拟纳米酶，用于快速、持久地比色检测 H2O2

纳米酶作为天然酶的替代品发展迅速。然而，有毒的合成和昂贵材料的使用严重限制了它们的大规模应用。为了解决这些问题，创新性地合成了Fe ³⁺掺杂的胺化木质素 (Fe-AL) 过氧化物酶模拟纳米酶。在Fe ³⁺掺杂之前，通过曼尼希或环氧化方法胺化将活性中心FeN _x引入碱性木质素。Fe-AL纳米酶可以在10-100 m M范围内实现H ₂ O _{2 的}准确比色检测并且可以重复使用 30 次以上，催化活性的降低可以忽略不计。此外，显色系统甚至可以在 72 小时内保持蓝色，这在设计廉价和便携式 H ₂ O ₂传感器方面显示出巨大的潜力。这项工作不仅可以促进木质素基纳米材料的发展，而且为从天然大分子合成纳米酶提供了一条新途径。

更新日期：2021-09-27

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