Navegando por Autor "He, Tao"

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    Enhancing TiO2 activity for CO2 photoreduction through MgO decoration.
    (2020) Torres, Juliana Arriel; Nogueira, André Esteves; Silva, Gelson Tiago dos Santos Tavares da; Lopes, Osmando Ferreira; Wang, Yanjie; He, Tao; Oliveira, Cauê Ribeiro de
    Herein we report on the influence of MgO’s basic character in the photoactivity of MgO:TiO2 nanocomposites for the CO2 reduction reaction. TiO2 nanoparticles, decorated with MgO in different mass proportions, were synthesized by the physical mixing of pre-synthesized oxides followed by calcination. The decorated samples presented enhanced photocatalytic activity with higher selectivity for CO, while CH4 was also produced, as well as HCOOH and CH3COOH in a liquid medium in lower proportions. The results indicate that the beneficial MgO influence is only effective at low amounts, whilst a high MgO amount favors an insulating behavior instead of semiconducting, reducing the nanocomposite performance for CO2 photoreduction.