A novel MnO-CrN nanocomposite based non-enzymatic hydrogen peroxide sensor

Ayesha Khan Tareen; Karim Khan; Waqas Ahmad; Muhammad Farooq Khan; Qudrat Ullah Khan; Xinke Liu

doi:10.1039/d1ra01485d

A novel MnO-CrN nanocomposite based non-enzymatic hydrogen peroxide sensor

RSC Adv. 2021 May 27;11(31):19316-19322. doi: 10.1039/d1ra01485d. eCollection 2021 May 24.

Authors

Ayesha Khan Tareen^{1

2}, Karim Khan^{2

3}, Waqas Ahmad⁴, Muhammad Farooq Khan⁵, Qudrat Ullah Khan⁶, Xinke Liu¹

Affiliations

¹ College of Materials Science and Engineering, Shenzhen University Nanhai Ave 3688 Shenzhen Guangdong 518060 P. R. China xkliu@szu.edu.cn.
² Institute of Microscale Optoelectronics, Collaborative Innovation Centre for Optoelectronic Science & Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ), Shenzhen University Shenzhen 518060 P. R. China karim_khan_niazi@yahoo.com.
³ School of Electrical Engineering & Intelligentization, Dongguan University of Technology, Dongguan (DGUT) Dongguan Guangdong Province 523808 P. R. China.
⁴ International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University Shenzhen 518060 P. R. China.
⁵ Department of Electrical Engineering, Sejong University 209 Neungdong-ro Gwangjin-gu 05006 South Korea.
⁶ Key Laboratory of Optoelectronic Devices and Systems, Ministry of Education and Guangdong Province, College of Physics and Optoelectronics Engineering, Shenzhen University Shenzhen 518060 China.

Abstract

A MnO-CrN composite was obtained via the ammonolysis of the low-cost nitride precursors Cr(NO₃)₃·9H₂O and Mn(NO₃)₂·4H₂O at 800 °C for 8 h using a sol-gel method. The specific surface area of the synthesized powder was measured via BET analysis and it was found to be 262 m² g^-1. Regarding its application, the electrochemical sensing performance toward hydrogen peroxide (H₂O₂) was studied via applying cyclic voltammetry (CV) and amperometry (i-t) analysis. The linear response range was 0.33-15 000 μM with a correlation coefficient (R ²) value of 0.995. Excellent performance toward H₂O₂ was observed with a limit of detection of 0.059 μM, a limit of quantification of 0.199 μM, and sensitivity of 2156.25 μA mM^-1 cm^-2. A short response time of within 2 s was achieved. Hence, we develop and offer an efficient approach for synthesizing a new cost-efficient material for H₂O₂ sensing.