| 吴珂,于世博,鲁辰淇,赵恬,袁博雅,宋宁宁,陈攀,张金明,梁敏敏,李唯.单分散纤维素寡糖调控钴酸镍纳米酶结构性能研究[J].中国造纸学报,2025,40(4):60-68 |
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| 单分散纤维素寡糖调控钴酸镍纳米酶结构性能研究 |
| Regulation of the Structural and Catalytic Properties of NiCo2O4 Nanozymes Using Monodisperse Cellulose Oligomers |
| 投稿时间：2025-09-28 修订日期：2025-11-19 |
| DOI：10.11981/j.issn.1000-6842.2025.04.60 |
| 中文关键词: 纳米酶 钴酸镍 纤维素 催化效率 |
| Key Words:nanozymes NiCo2O4 cellulose catalytic efficiency |
| 基金项目:北京市自然科学基金（L254007）；河北省自然科学基金（B2023105020）；中国科协青年人才托举工程（2024QNRC0372）；北京理工大学青年教师启动计划（XSQD-202108010）。 |
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| 中文摘要: |
| 本研究通过引入单分散纤维素寡糖（MCOs）作为分子支架，成功制备了MCOs@NiCo2O4复合纳米酶。借助MCOs优异的表面修饰性和限域效应，有效引导NiCo2O4纳米酶成核与定向生长，获得了形貌完整、表面化学环境可控的复合材料。结构表征结果显示，MCOs的引入显著改善了NiCo2O4纳米酶的分散性与界面化学环境，促进了活性位点的暴露。催化性能测试结果表明，MCOs@NiCo2O4复合纳米酶在3,3’,5,5’-四甲基联苯胺（TMB）/H2O2体系中表现出了更高的比酶活和反应速率，且在保持底物结合能力的同时，通过提高单位酶量的催化速率，实现了整体催化效率的提升。结果表明，MCOs的修饰不仅优化了NiCo2O4纳米酶的结构与表面特性，还增强了其类过氧化物酶活性，为构建结构可控、性能可调的高效复合纳米酶提供了新的设计策略与合成路径。 |
| Abstract: |
| In this study， monodisperse cellulose oligosaccharides (MCOs) were introduced as molecular scaffolds to successfully synthesize MCOs@NiCo2O4 composite nanozymes. Benefiting from the excellent surface modification ability and confinement effect of MCOs， the nucleation and oriented growth of NiCo2O4 nanozymes were effectively guided， resulting in well-defined morphology and controllable surface chemical environments. Structural characterizations revealed that the incorporation of MCOs significantly improved the dispersion and interfacial chemistry of NiCo2O4 nanozymes， facilitating the exposure of active sites. Catalytic performance tests demonstrated that MCOs@NiCo2O4 composite nanozymes exhibited higher specific enzyme activity and reaction rate in the 3，3’，5，5’-tetramethylbenzidine (TMB)/H2O2 system. Moreover， by enhancing the catalytic rate per enzyme unit while maintaining substrate-binding ability， the overall catalytic efficiency was effectively improved. These results indicated that MCOs modification not only optimized the structural and surface properties of NiCo2O4 nanozymes but also enhanced its peroxidase-like activity， providing a novel design strategy and synthesis route for constructing structurally controllable and performance-tunable high-efficiency composite nanozymes. |
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