DataVXACS Applied Nano MaterialsPaper
journal article·2022-05-27

Mn-Etched Zeolitic Imidazolate Framework-67 Nanostructures for Biomimetic Superoxide Anion Sensing

Fang Shi, Zhuanzhuan Shi, Zhuo Zou, Xiaoshuai Wu, Zhengyang Liu, Liang Liu, Qianqian Fu, Yuan Li, Wei Sun, Chunxian Guo, Chang Ming Li

ACS Applied Nano Materials· Volume 5· Issue 5
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Source abstract

Abstract

It is a great challenge to detect superoxide anions (O2•–) with low level concentrations and short half-life in biological systems. Herein, mild and facile Mn etching for zeolitic imidazolate framework-67 (ZIF-67) was used to synthesize Mn/ZIF-67 with a hydrangea-like nanostructure for biomimetic sensing of O2•– released from living cells. The tailored optimal Mn/ZIF-67 sensor achieves a high selectivity, a fast response time (1.6 s), a broad linear detection range (1.5 nM–10 μM), an ultralow detection limit (0.8 nM), and a remarkably high sensitivity (439.2 μA μM–1 cm–2) that ranks the best among all reported conventional Mn- and Co-compound-based nanozymes such as Co2P and Mn3(PO4)2. The excellent sensing performances are attributed to the Mn etching-generating hydrangea-like nanostructure for a significantly increased reaction surface area and coordinating Mn2+ with Co2+ to raise the oxidation state of Co2+ for fast electron transfer during the oxidation of O2•–. This work holds great potential for a highly sensitive O2•– nanozyme sensor in practical clinical diagnosis and bioscience research, while shedding fundamental light on designs of sensitive nanozyme sensors by incorporating two metal ions with largely different negativity for an efficient electrocatalytic process, thereby possessing universal significance.
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Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: Advanced Nanomaterials in Catalysis · Electrochemical sensors and biosensors · Advanced biosensing and bioanalysis techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Life Science, Institute of Advanced Cross-field Science, Qingdao University, Qingdao 266071, China

School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China

Key Lab of Laser Technology and Optoelectronic Functional Materials of Hainan Province, Key Lab of Functional Materials and Photoelectrochemistry of Haikou, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China

Funding

Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Innovation Platform for Academinicians of Hainan Province · Natural Science Foundation of Suzhou University of Science and Technology · Suzhou Foreign Academician Workstation · Natural Science research Foundation of Jiangsu Higher Education Institutions · Jiangsu Laboratory for Biochemical Sensing and Biochip · Jiangsu Key Laboratory for Micro and Nano Heat Fluid Flow Technology and Energy Application, Suzhou University of Science and Technology · Collaborative Innovation Center of Water Treatment Technology and Material

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