A convenient one-step solvothermal process to construct TiO 2 nanoparticles anchored onto NH 2 -MIL-88B(Fe) with enhanced adsorption capacity and photocatalysis performance was reported. The TiO 2 @NH 2 -MIL-88B(Fe) (abbreviated to SU- x ) exhibited excellent adsorption and photodegradation performance toward methylene blue (MB) from simulated wastewater under the irradiation of visible LED light. The enhanced catalytic capability can be mostly attributed to the improved adsorption performance and efficiently photogenerated electrons transported to the conduction band of TiO 2 from that of NH 2 -MIL-88B(Fe). The synergistic effect of TiO 2 and NH 2 -MIL-88B(Fe) was verified by the photocurrent response and electrochemical impedance spectroscopic analysis. Moreover, the efficiency of the photocatalyst was not significantly reduced even after being recycled 5 times, showing the good stability and reusability of TiO 2 @MOF. These bifunctional TiO 2 @MOF composites thus display excellent adsorption capability, efficient charger carrier separation, and favorable stability, providing new insights into the preparation of composite materials based on Fe-MOF with high efficiency for photocatalytic environmental remediation.
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Li et al. (2018) studied this question.
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