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2D/3D-Shaped Fe0.8Ni0.2S2/ZIF-67 as a Nanozyme for Rapid Measurement of H2O2 and Ascorbic Acid with a Low Limit of Detection
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2022-08-25 , DOI: 10.1021/acs.inorgchem.2c01925
Chengyu Zhang 1 , Zhaodong Nan 1
Affiliation  

Metal–organic frameworks (MOFs) can be used as ideal artificial nanozymes for an open structure to transfer substances and products. The nanozymic mechanism of MOFs needs further investigation for wide application. In this manuscript, no peroxidase-like activity was found for ZIF-67 (a kind of MOF), however, it enhanced the peroxidase-like activity of the Fe0.8Ni0.2S2/ZIF-67 composite, in which Fe0.8Ni0.2S2 was the active composition. The catalytic constant (Kcat) is higher at 1.98 (for TMB) and 2.08 (for H2O2) times and the catalytic efficiency (Kcat/Km) is higher at 3.13 (for TMB) and 2.67 (for H2O2) times, than those of Fe0.8Ni0.2S2. The Km value decreased about 85 times (for H2O2) for Fe0.8Ni0.2S2/ZIF-67 than that of horseradish peroxidase (natural enzyme). The mechanism was proposed. The limit of detection of H2O2 for Fe0.8Ni0.2S2/ZIF-67 is 0.039 μM, which is lower by about 18.2 times than that of Fe0.8Ni0.2S2. Simultaneously, Fe0.8Ni0.2S2/ZIF-67 was used to rapidly detect ascorbic acid for only 1.0 min in food monitoring. This study may be important to design a new kind of nanozyme.

中文翻译:

2D/3D 形 Fe0.8Ni0.2S2/ZIF-67 作为纳米酶,用于快速测量 H2O2 和抗坏血酸,检测限低

金属有机框架(MOFs)可用作理想的人造纳米酶,用于以开放结构转移物质和产物。MOFs的纳米酶机制需要进一步研究以广泛应用。在这篇手稿中,没有发现 ZIF-67(一种 MOF)的类过氧化物酶活性,但它增强了 Fe 0.8 Ni 0.2 S 2 /ZIF-67 复合材料的类过氧化物酶活性,其中 Fe 0.8 Ni 0.2 S 2是活性成分。催化常数(K cat)在 1.98(对于 TMB)和 2.08(对于 H 2 O 2)和催化效率(K cat /K m ) 是 Fe 0.8 Ni 0.2 S 2的 3.13 (TMB) 和 2.67 (H 2 O 2 ) 倍。Fe 0.8 Ni 0.2 S 2 /ZIF-67的K m值(H 2 O 2 )比辣根过氧化物酶(天然酶)降低约85倍。提出了该机制。Fe 0.8 Ni 0.2 S 2 /ZIF-67的H 2 O 2检出限为0.039 μM,比Fe 0.8 Ni低约18.2倍0.22。同时,在食品监测中使用Fe 0.8 Ni 0.2 S 2 /ZIF-67快速检测抗坏血酸仅需1.0 min。这项研究可能对设计一种新型纳米酶很重要。
更新日期:2022-08-25
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