Add time:07/29/2019         Source:sciencedirect.com

In this study, a simple sol-gel approach was applied to fabricate novel N-Ti3+ co-doped porous titanate-TiO2 rod-like heterostructures with both enhanced adsorption ability and visible light photocatalytic activity. We also investigated the effect of calcination temperature on the physical properties and visible light photocatalytic activity of the heterostructures. When calcined at high temperature (>400 °C), the rod-like heterostructures became thermally less stable due to the structural conversion of the visible-light-active composite (Na2Ti3O7–anatase rod-like heterostructures) into the visible-light-inactive form (Na2Ti3O7 − Na2Ti6O13 heterostructures). High mesoporosity, low recombination rate of electrons and holes, and effective incorporation of nitrogen dopants and Ti3+ defects were the main features of the enhanced photocatalytic activity of the rod-like heterostructures in the degradation of 10 mg/L methylene blue (MB) under visible light. O2− was the dominated radical for MB photodegradation.

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