Synthesis of hierarchically structured photocatalysts has been devoted to improving photocatalytic activity or product selectivity. In this work, bionic substrates, such as natural leaf and sugarcane bagasse, were selected to support graphitic carbon nitride (gCN) or titanium dioxide (TiO2). In-situ growth of gCN or TiO2 on substrates was achieved under hydrothermal process. The photocatalytic reduction of gaseous carbon dioxide with the presence of water vapor was conducted by using a series of bionic substrates supported photocatalysts. The preparation procedures were tuned and combined with post-treatment to obtain photocatalysts with higher surface area, improved capability to absorb lights and better charge transfer efficiency. The quantum efficiency of the conversion of CO2 via each photocatalyst under illumination was compared and correlated to the characteristics of samples. The hydrophobicity of catalysts significantly affected the adsorption of CO2 and consequently the product selectivity. The bio-templating technique showed potentials to fine tune properties to suit photocatalytic applications.

Comparing photocatalytic activity of bionic substrate supported titanium dioxide and graphitic carbon nitride

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.