Abstract
It is of significance for this society to develop and utilize sustainable energy and renewable resources. Photocatalytic the transformation of biomass exhibits a variety of seductive advantages, including cost-effectiveness, sustainability, mild reaction conditions and environment-benign properties. However, in order to obtain a relative high yield, most photocatalytic oxidation of HMF systems employ O2 as sole oxidant or adopt high light density condition, which is much higher than the natural sunlight density. In this work, we employ microwave-assisted post-synthetic metal exchange (PSE) method to synthesize porous TiO2@UIO-67-Zr/Ti composite as photocatalyst for the oxidation of HMF to DFF under air condition at low temperature (4 oC). SEM and FT-IR characterizations confirm the successful cation exchange of Ti4+ with Zr4+, and the Raman spectra confirm the existence of strong interactions between TiO2 and UIO-67-Zr/Ti. This catalyst exhibits enhanced photocatalytic performance, achieving 94% conversion with more than 70% selectivity for DFF. Moreover, this system also exhibits wide substrates compatibility.
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