广东工业大学学报 ›› 2022, Vol. 39 ›› Issue (02): 130-136.doi: 10.12052/gdutxb.200170
• 综合研究 • 上一篇
杨俊松, 钟颖颖, 余倩
Yang Jun-song, Zhong Ying-ying, Yu Qian
摘要: 通过原位整合法制备了粒径约为136 nm,形态均一的方块状IrO2@MnO2纳米复合物。经实验证明该复合物具有协同提高的氧化酶模拟活性,其Km值为6.50 × 10-3 mmol/L,远优于IrO2 纳米颗粒(IrO2 Nanoparticles,IrO2 NPs)(Km = 9.73 × 10-2 mmol/L)和MnO2纳米颗粒(MnO2 Nano-particles, MnO2 NPs)(Km = 2.41 × 10-1 mmol/L)。此外,通过实验获得了用于抗坏血酸(AscorbicAcids,AA)检测的IrO2@MnO2纳米复合物的最佳传感条件,包括反应体系为pH为4、反应温度为37 ℃、反应时间为5 min、IrO2@MnO2复合纳米酶质量浓度为71.43 μg/mL。最后,IrO2@MnO2纳米复合物被用于检测AA,检测范围为0~312.5 μmol/L,定量限为14.2 μmol/L,检测限为1.42 μmol/L。本文所制备IrO2@MnO2纳米酶在食品监制、生物医药、临床诊断等领域具有较高的潜在应用价值。
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