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In this report, the results from a study on the influence of operational parameters on TiO 2 photocatalytic activity for CO 2 reduction under an ultraviolet-visible (UV-vis) illumination are presented. The results indicated that the TiO 2 was found to be active for CO 2 reduction with CH 3 OH as the major products, while other minor products (CO, CH 4 , and C 2 H 4 ) were also detected. In addition, the formation of such reduction products was obviously influenced by the operational parameters. Under this study, the optimum operational parameters for CO 2 reduction at 298 °K were determined to be: NaOH concentration 0.2 M, TiO 2 dosage 2 g/L, volume of the reaction media 75 mL, the pressure of system 800 kPa. It was also found that the increase in UV-vis illumination time have increased the yield of product formation. A possible reaction pathway for the formation of the reduction products is also discussed.

indonesian journal of chemistry

Influence of Operational Parameters on the Photocatalytic Activity of Powdered TiO&lt;sub&gt;2&lt;/sub&gt; for the Reduction of CO&lt;sub&gt;2&lt;/sub&gt;