Titanium dioxide (TiO 2 ) is a commonly used photocatalysis for the oxidation of hydrogen sulfide (H 2 S). However, the low surface area and adsorption ability of TiO 2 limit the photocatalytic decomposition rate. Here, a tunable metal–organic framework (MOF) coating is applied to hollow TiO 2 nanoparticles using a versatile step-by-step self-assembly strategy. The hollow structure provides a high surface area, and the selected MIL-101 (Cr) MOF has a high and regenerable adsorption ability for H 2 S. The TiO 2 @MIL-101 double-shell hollow particles enable a catalytic cycle involving simultaneous adsorption and degradation of H 2 S, with considerably enhanced photocatalytic reaction rate. This work provides a method for improving photocatalytic performance through the design of hollow MOF-based materials that rationally combine the power of MOF and TiO 2 .
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Sheng et al. (2017) studied this question.
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