ELSEVIER 2019 – Scientific Paper – Gas Sensor Detection

University: Zhejiang University
Authors: Hao Wan, Ying Gan, Jiadi Sun, Tao Liang, Shuqi Zhou, Ping Wang
Journal: Elsevier 2019
Impact Factor: 6.393 (What is the IF?). Elsevier is considered a leading reference for Sensor’s Scientific Papers
Application Note related to our instrument: Gas Sensor Fabrication

TITLE: High sensitive reduced graphene oxide-based room temperature ionic liquid electrochemical gas sensor with carbon-gold nanocomposite amplification.

ABSTRACT: Gas sensors have received extensive attraction due to their critical roles in environmental monitoring, industrial manufacture, and human safety. This paper for the first time introduces carbon-gold nanocomposites on a reduced graphene oxide-based electrochemical gas sensor for highly sensitive gas detection.
Carbon-gold nanocomposites (CGNs) were synthesized by glucose carbonization and gold nanoparticle deposition using the hydrothermal method. Reduced graphene oxide (RGO) was electrochemically deposited on a screen-printed gold electrode with subsequent modification of CGNs. To achieve a long lifetime and good stability, thin-film room temperature ionic liquid (RTIL) was utilized as the electrolyte featuring negligible evaporation and a large potential window, thus implementing the highly sensitive RTIL-based electrochemical gas sensor. The amplification effect of RGO and CGNs modification was investigated using cyclic voltammetry, chronoamperometry, and transient double potential amperometry (DPA), which reveals the significant enhancement of sensor performance by synergic application of RGO and CGNs.
The sensor was calibrated for oxygen detection from 0.42% to 21% with good sensitivity and linearity. The reproducibility of the sensor using chronoamperometry and transient DPA was also studied with excellent reproducibility. The study paves a new way to implement highly sensitive electrochemical gas sensors for rapid monitoring of gas exposure.

FULL AND ORIGINAL SCIENTIFIC PAPER: Sensors and Actuators B: Chemical

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