Background: Evaluation of the performance of synthetic nanocatalysts TiO2/Al-FSM-16 and ZnO/Al-FSM-16 in the removal of dye pollution in the photocatalytic process
Aim: To reduce the amount of dye in the effluent and remove the pollution to an acceptable level, before discharging it to the environment. Methodology: In the present study, new photocatalysts were prepared using FSM-16 silicate cavity as a catalyst bed and TiO2 and ZnO semiconductors were placed on the bed surface. Photocatalysts were identified by various techniques such as BET and XRD. The results show that after the semiconductors are placed on the surface of the substrate, the structure of the photocatalysts and the substrate remain almost unchanged while the energy of the semiconductor band gap shifts to a lower energy level, which is used to destroy pollutants with the help of light radiation. useful. In addition, after the stabilization process, the recombination of the hole electrons was significantly reduced, which leads to an increase in the degradation efficiency. The photocatalysts synthesized to degrade the studied pollutants were exposed to ultraviolet light. Factors such as pH, dye solution concentration, irradiation time, amount of photocatalyst; TiO2/Al-FSM-16 and ZnO/Al-FSM-16 loading and the effect of each were investigated and finally the amount of catalyst was optimized. Finally, the solution was analyzed by Hplc method to better understand the process of contamination removal and nature detection. Results: Contamination removal experiments showed that%99 for TiO2/Al-FSM-16 at best and%69 for ZnO/Al-FSM-16 at best.
Conclusions: Based on the results, it can be seen that the removal of contamination using adsorption method and using FSM-16 adsorbent has been done correctly and in the presence of titanium dioxide, compounds containing methyl orange have been completely removed from the solution. And with six reuses of the mentioned photocatalyst, it has the necessary efficiency up to 5