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This study investigated a gas adsorbent film based on the AC/MgO/Fe2O3/TiO2/ZnO/Zeolite nanocomposite for NO, CO, and SO2gas removal. The gas adsorption in the absorbent film in the presence and absence of plasma and at room temperature have been compared. The results indicated a rapid reduction in CO concentration, decreasing from 1500 ppm to 200 ppm (in the absence of plasma) and 1500 ppm–50 ppm (in the presence of plasma) within just 1 minute. The plasma notably enhanced removal efficiencies of pollutant gases and showed the efficiency of 92 %, 95 %, and 97 % for SO2, NO, and CO gas, respectively. Furthermore, the finding reveals that the presence of plasma in the environment enhances the effectiveness of the nanocomposite for all three gases, resulting in an approximate 12 % increase in efficiency. The analysis of the adsorption capacities of the AC/MgO/Fe2O3/TiO2/ZnO/Zeolite revealed that SO2exhibited the lowest adsorption capacity, whereas CO demonstrated the highest adsorption capacity. The findings of this research offer valuable insights into nanocomposite adsorbent layers and the impact of plasma environments on the efficiency of absorbent films for future researchers.

In this study, fast gas adsorbent nanocomposites based on the carbon nanotubes (CNTs)/titanium dioxide (TiO2)/copper oxide (CuO)/Zeolite (CNTs/TiO2/CuO/Zeolite) and CNTs/TiO2structures for nitrogen dioxide (NO2) gas removal have been investigated. The nanocomposite adsorbent films were deposited on the glass substrate using the push coating method. The nanocomposite films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET). The BET test was carried out to study the total surface and the diameter of the pores within the matrices of the nanocomposites. For the CNTs/TiO2nanocomposite, the NO2gas concentration (NGC) was decreased from 102 ppm to 41 ppm, and for the CNTs/TiO2/CuO/Zeolite nanocomposite NGC was decreased from 172 ppm to 34 ppm. The gas test results revealed that the efficiency and adsorption capacity of CNTs/TiO2/CuO/Zeolite nanocomposite were 80 % and 138 mg g−1, respectively with the NO2reduction rate of K = 0.37 min−1. The additional gas test exhibited that the adsorption efficiency of the CNTs/TiO2/CuO/Zeolite nanocomposite is higher than that of CNTs/TiO2. This study is promising and opens new insight for investigating the adsorption capability of these materials for removal of the pollutants from industrial regions as environmentally friendly filters.