Sodium tripolyphosphate cross-linked chitosan based sensor for enhacing sensing properties towards acetone

TALENTA - Conference on Engineering, Science and Technology 2017

工业技术;自然科学

Nasution, T.I.^1,2,5 ; Asrosa, R.^2 ; Nainggolan, I.^3,4 ; Balyan, M.^1,5 ; Indah, R.^2 ; Wahyudi, A.^2

Centre of Excellence for Sensor Systems and Technology, Universitas Sumatera Utara, Medan Sumatera Utara

20155, Indonesia^1

Physics Department, Faculty of Mathematics and Natural Science, Universitas Sumatera Utara, Medan Sumatera Utara

20155, Indonesia^2

Chemistry Department, Faculty of Mathematics and Natural Science, Universitas Sumatera Utara, Medan Sumatera Utara

20155, Indonesia^3

Centre of Green Chitin and Chitosan, Universitas Sumatera Utara, Medan Sumatera Utara

20155, Indonesia^4

Integrated Laboratory of Physics, Universitas Sumatera Utara, Medan Sumatera Utara

20155, Indonesia^5

关键词: Acetone concentrations;    Chitosan solution;    Cross linked chitosan;    Electrochemical deposition methods;    Output voltages;    Reproducibilities;    Sensing property;    Sodium tripolyphosphate;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/309/1/012083/pdf
DOI  :  10.1088/1757-899X/309/1/012083

来源: IOP

【 摘 要 】

In this report, sensing properties of sodium tripolyphosphate (TPP) cross-linked chitosan based sensor has been successfully enhanced towards acetone. Chitosan solutions were cross-linked with sodium TPP in variation of 0.1%, 0.5%, 1% and 1.5% w/v, respectively. The sensors were fabricated in film form using an electrochemical deposition method. The sensing properties of the sensors were observed by exposing the pure chitosan and sodium TPP cross-linked chitosan sensors towards acetone concentrations of 5, 10, 50, 100 and 200 ppm. The measurement results revealed that the maximum response in output voltage value of pure chitosan sensor was 0.35 V while sodium TPP crosslinked chitosan sensors were above 0.35 V towards 5 ppm acetone concentration. When the sensors were exposed towards acetone concentration of 200 ppm, the maximum response of pure chitosan was 0.45 V while sodium TPP crosslinked chitosan sensors were above 0.45 V. Amongst the variation of sodium TPP, the maximum response of 1% sodium TPP was the highest since the maximum response was 0.4 V and 0.6 V towards 5 ppm and 200 ppm acetone concentration, respectively. While the maximum responses of other sodium TPP concentrations were under 0.4 V and 0.6 V towards 5 ppm and 200 ppm acetone concentration. Moreover, 1% sodium TPP cross-linked chitosan based sensor showed good reproducibility and outstanding lifetime. Therefore, 1% sodium TPP cross-linked chitosan based sensor has exhibited remarkable sensing properties as a novel acetone sensor.