MnCo2O4Microflowers Anchored on P-Dopedg-C3N4Nanosheets as an Electrocatalyst for Voltammetric Determination of the Antibiotic Drug Sulfadiazine
Journal
ACS Applied Electronic Materials
Journal Volume
3
Journal Issue
9
Pages
3915-3926
Date Issued
2021
Author(s)
Sriram B
Baby J.N
Hsu Y.-F
Wang S.-F
Benadict Joseph X
George M
Veerakumar P
KING-CHUEN LIN
Abstract
In this work, hierarchically superior spinel crystalline manganese cobaltite (MnCo2O4) microflowers were hydrothermally synthesized to anchor on phosphorus-doped graphic carbon nitride nanosheet (MnCo2O4/P-CN) nanocomposites for the robust detection of the antibiotic sulfadiazine (SF). The structure and surface characteristics of the obtained composite were measured by the spectroscopic method, which collectively suggests the superior physical and chemical properties of the composite. The anodic oxidation of SF was considered at a glassy carbon electrode modified by MnCo2O4/P-CN (MnCo2O4/P-CN/GCE) using cyclic voltammetry (CV) and amperometry (i-t) techniques. A synergistic relationship between the high-quality flower-like MnCo2O4and P-CN materials provides high electrical conductivity, larger surface area, and increased surface-active sites. The results indicate that MnCo2O4/P-CN/GCE shows excellent electrocatalytic activity toward the anodic oxidation of SF in pharmaceutical contaminants present in the environment at buffered pH 7.0. The proposed sensor viai-tand differential pulse voltammetry (DPV) results exhibits a wide linear range (LR: 0.008-207.57 and 0.01-95.40 μM), lower detection limit (LOD: 1.2 and 3 nM), and good sensitivity (9.28 and 49.28 μM μA-1cm-2), respectively, as well as an excellent operational and cycle stability toward the electrochemical determination of SF. The unique structural features of a spinel crystalline MnCo2O4microflower with symmetrical petals and six trunks can progressively enhance the electrochemical performance of the SF sensor. The state-of-the-art analysis of real samples confirms the possible utilization of Mn-Co-based sensors toward the monitoring of antibiotic residues, thus helping in assessing the behavior of pharmaceutical contaminants in the environment. ? 2021 American Chemical Society
Subjects
3D spinel
electrochemical approach
MnCo2O4
P-doped carbon nitride
real-time analysis
Anodic oxidation
Antibiotics
Carbon nitride
Chemical detection
Electrocatalysts
Glass membrane electrodes
Manganese compounds
Spectroscopic analysis
3d spinel
Antibiotic drugs
Electrochemical approach
Electrochemicals
Hydrothermally synthesized
Microflowers
Pharmaceutical contaminants
Real time analysis
Voltammetric determination
Cyclic voltammetry
Type
journal article