Mesoporous CuO-graphene coating of mesoporous TiO₂ for enhanced visible-light photocatalytic activity of organic dyes

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>This work presents a combination of mesoporous CuO-graphene and mesoporous TiO<SUB>2</SUB> materials, using a hydrothermal method at low temperature. The photocatalytic activity was evaluated for organic dyes decomposition. The high photocatalytic rate is mainly due to the high photogenerated electron-holes transport properties, as well as the mesoporous structure of the as-obtained CuO-graphene-TiO<SUB>2</SUB> photocatalyst. The as-prepared materials were characterized by XRD, nitrogen adsorption/desorption isotherms, SEM, EDX, TEM, HR-TEM, XPS, DRS, and Raman analysis. The highest photocatalytic activity of RBB organic dyes is mainly due to the large adsorption capacity of the as-obtained CuOGT material, as well as the high separation efficient of the photogenerated e<SUP>—</SUP>h<SUP>+</SUP> pairs. The as-prepared mesoporous CuO-graphene-TiO<SUB>2</SUB> material is a promising candidate for enhancing the photocatalytic performance of organic dyes, phenol compounds, and industrial wastewater.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The high photocatalytic rate is mainly due to the high photogenerated electron-holes transport properties of the as-obtained mesoporous CuO-graphene-TiO<SUB>2</SUB> photocatalyst. </LI> <LI> This is attributed to the large BET surface area, large total pore volume, and small average pore size distribution, which play an important role in the photocatalytic performance. </LI> <LI> The as-prepared mesoporous CuO-graphene-TiO<SUB>2</SUB> material is a promising candidate for enhancing the photocatalytic performance of organic dyes, phenol compounds, and industrial wastewater. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>