The beauty inhabited inside the modified Graphene for moisture detection at different frequencies
- PDF / 2,389,881 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 68 Downloads / 136 Views
The beauty inhabited inside the modified Graphene for moisture detection at different frequencies Kuldeep Kumar1 · Ajeet Singh1 · Utkarsh Kumar1 · Ravi Kant Tripathi1 · B. C. Yadav1 Received: 12 January 2020 / Revised: 25 April 2020 / Accepted: 19 May 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The present paper details on the synthesis and characterization of the modified Graphene and its moisture sensing application. The characterization tools as Brunauer–Emmett–Teller (BET), Scanning Electron Microscopy (SEM), Electron Dispersive X -rays (EDX), Particle size distribution, Fourier-Transform Infrared (FTIR), UV–Vis spectrophotometry and Raman are employed for characterizing the synthesized material. The BET demonstrations of the synthesized material have a specific surface area as 10.55 m2/g together with pore size distribution range from 10.34 to 97.44 nm, confirming the mesoporous material. The SEM, EDX, FTIR, UV–Vis spectroscopy and Raman analysis of the synthesized material confirmed that it is the modified Graphene (m-Graphene). Presence of the ID/IG = 1.55 confirms more defects along with many dangling bonds which are more beneficial for the humidity detection. The humidity sensing characteristics of m-Graphene based sensor have been observed from 100 Hz to 10 kHz frequencies and the best sensitivity was found at 100 Hz. The sensor shows high sensitivity of 2.51 MΩ/%RH along with the calculated repeatability, response and recovery time of 96.05%, 24 and 13 s, respectively, at room temperature.
1 Introduction Nowadays, more innovation takes place every day in the area of sensors based on new smart materials. The nanomaterials are the attraction of the era due to their size-dependent remarkable properties. In that respect, there are different fabrics which are utilized for the best in different applications [1–4]. The nanostructured metal oxides, polymers, carbonbased nanomaterials, nanocomposites etc. are employed in the energy storage devices, solar cells, photovoltaic cell, flexible devices and sensors [5–10]. A humidity sensor along with high sensitivity, high repeatability, low hysteresis, small response and recovery time is desirable. Material and its size play a key role in the humidity sensing devices [11, 12]. The detection of the humidity in the environment is not only for the human being but also for the non-living bodies. In the field of medicals, agricultures, defence and food technology, the measurement of the humidity is very much important. There are plenty of the humidity measurements * B. C. Yadav [email protected] 1
Nanomaterials and Sensors Research Laboratory, Department of Physics, Babasaheb Bhimrao Ambedkar University, Lucknow, U.P. 226025, India
techniques which are already reported [13, 14]. A variety of fabrics e.g. metal oxides, polymers, nanocomposites and carbon nanomaterials are used to design the humidity sensors [15, 16]. The carbon-based nanomaterials graphene, graphene oxide (GO) and reduced graphene oxides (rGO) ar
Data Loading...
