دورية أكاديمية

Electrochemical sensing mechanism of ammonium ions over an Ag/TiO 2 composite electrode modified by hematite.

التفاصيل البيبلوغرافية
العنوان: Electrochemical sensing mechanism of ammonium ions over an Ag/TiO 2 composite electrode modified by hematite.
المؤلفون: Zhang S; Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074, P. R. China. tangaidong@cug.edu.cn.; College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.; Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China.; Department of Chemistry National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.; NUS Environmental Research Institute, National University of Singapore, T-Lab Building, 5A Engineering Drive 1, Singapore 117411, Singapore., Hu J; College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China., Li SFY; Department of Chemistry National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.; NUS Environmental Research Institute, National University of Singapore, T-Lab Building, 5A Engineering Drive 1, Singapore 117411, Singapore., Lu H; College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China., Wang G; College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China., Lu C; College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China., Sarwar MT; Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074, P. R. China. tangaidong@cug.edu.cn.; Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China.; Key Laboratory of Functional Geomaterials in China Nonmetallic Minerals Industry, China University of Geosciences, Wuhan 430074, P. R. China., Tang A; Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074, P. R. China. tangaidong@cug.edu.cn.; College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China.; Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China.; Key Laboratory of Functional Geomaterials in China Nonmetallic Minerals Industry, China University of Geosciences, Wuhan 430074, P. R. China., Yang H; Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074, P. R. China. tangaidong@cug.edu.cn.; Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China.; Key Laboratory of Functional Geomaterials in China Nonmetallic Minerals Industry, China University of Geosciences, Wuhan 430074, P. R. China.
المصدر: Chemical communications (Cambridge, England) [Chem Commun (Camb)] 2023 Feb 28; Vol. 59 (18), pp. 2636-2639. Date of Electronic Publication: 2023 Feb 28.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Royal Society of Chemistry Country of Publication: England NLM ID: 9610838 Publication Model: Electronic Cited Medium: Internet ISSN: 1364-548X (Electronic) Linking ISSN: 13597345 NLM ISO Abbreviation: Chem Commun (Camb) Subsets: PubMed not MEDLINE; MEDLINE
أسماء مطبوعة: Original Publication: Cambridge : Royal Society of Chemistry
مستخلص: Here, we demonstrate a new electrochemical sensing mechanism of ammonium ions (NH 4 + ) involving a two-electron oxygen reduction reaction (ORR) and a hydrazine reaction. The NH 4 + are electrooxidized to hydrazine by H 2 O 2 derived from the ORR over a self-supporting Ag/TiO 2 nanotube array composite electrode modified by hematite (Ag/Fe 2 O 3 /TNTs). The Ag/Fe 2 O 3 /TNT sensor exhibits a high sensitivity of 1876 µA mM -1 cm -2 with a detection limit of 0.18 µM under non-alkaline conditions, a short response time of 3 s, good reproducibility, and fine selectivity among various interferents, and is also successfully used in real water bodies to display high accuracy. Furthermore, this new mechanism has a certain universality in a range of Ag (main catalyst)/transition metal oxide (cocatalyst)/TNT sensing systems. This work offers a new design basis for the urgently needed electrochemical ammonia nitrogen sensors.
تواريخ الأحداث: Date Created: 20230213 Date Completed: 20230228 Latest Revision: 20230228
رمز التحديث: 20231215
DOI: 10.1039/d3cc00240c
PMID: 36779275
قاعدة البيانات: MEDLINE
الوصف
تدمد:1364-548X
DOI:10.1039/d3cc00240c