Kinetics of CO2 adsorption on ball-type dicopper phthalocyanine thin film

Ahmet Altindal*, Özgür Kurt, Abdurrahman Şengül, Özer Bekaroǧlu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Adsorption kinetics of CO2 on ball-type dicopper phthalocyanine thin film had been studied. The experimental data were analysed using four adsorption kinetic models; the pseudo first- and second-order equations, Ritchie's equation and the Elovich equation to determine the best fit equation for the adsorption of CO2 gas onto dicopper phthalocyanine thin film. The rate constants, equilibrium capacities and related correlation coefficients for each kinetic model were calculated and discussed. Results show that the linear regression analysis with respect to Ho's pseudo second order rate equation generates a straight line that best fit to the data of adsorption of CO2 on Pc film. It, unexpectedly, does not fit Elovich's or Ritchie's equation which are widely used in describing the adsorption of gaseous particles on solid systems. The variation of current in ball-type CuPc thin film as a function of temperature at constant bias voltage were also studied in the presence of CO2, SO2 and CO gases. While exposure to SO2 and CO have no considerable influence on the electrical conductivity of compound 4, the conductivity of the film strongly depend on the presence of the CO2 gas. The results indicated that the film of compound 4 has potential as a sensitive coating for the monitoring of CO 2 gas even at room temperature.

Original languageEnglish
Pages (from-to)373-381
Number of pages9
JournalSensors and Actuators, B: Chemical
Volume202
DOIs
Publication statusPublished - 31 Oct 2014
Externally publishedYes

Funding

We thank the Turkish Academy of Sciences (TUBA). This work was supported by the Yıldız Technical University Commission of Scientific Research Projects under Grant No. 2014-01-01-YL01 and 2014-01-01-KAP01. Authors are thankful to the Scientific Research Commission of Yıldız Technical University.

FundersFunder number
Yıldız Technical University Commission of Scientific Research Projects2014-01-01-KAP01, 2014-01-01-YL01

    Keywords

    • Adsorption kinetics
    • Phthlocyanine
    • Sensing mechanism
    • Sensitivity

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