Fabrication of electrochemical hydrogen peroxide sensors using carbon nanotubes combined with molybdenum diselenide
Journal
Vacuum
Journal Volume
241
Start Page
114666
ISSN
0042-207X
Date Issued
2025-11
Author(s)
Hu, Lei
Huang, Yu-Chiao
Huang, Yung-Jui
Lin, Pao-Hung
Wang, Huan-Chun
Su, Jung-Chieh
Lin, Chung-Kuang
Lee, Kuei-Yi
Abstract
In the study, molybdenum diselenide (MoSe2), categorized as a transition metal dichalcogenide (TMDs), was utilized for bioelectrochemical sensing purposes. The combination of MoSe2 with carbon nanotubes (CNTs) via chemical vapor deposition (CVD) resulted in a substantial enhancement of the material's specific surface area, which, in turn, led to improved detection sensitivity. In the current analysis, the electrode's performance in detecting hydrogen peroxide (H2O2) was assessed through cyclic voltammetry (CV), focusing on H2O2 concentrations ranging from 50 μM to 10 mM. The segmented detection approach demonstrated exceptional sensitivity, minimal detection thresholds, and high precision. Specifically, within the concentration range of 50 μM–100 μM, the sensor achieved a maximum sensitivity of 1.44 μA/μM · cm2. Altogether, these findings confirm that the MoSe2/CNTs composite electrode exhibits remarkable potential as a biosensor for H2O2 detection.
Subjects
Carbon nanotubes
Hydrogen peroxide
Molybdenum diselenide
Phosphate-buffered saline
Publisher
Elsevier BV
Type
journal article