Abstract
The introduction of MoS2 is beneficial to the separation and transfer of photogenerated electron–hole pairs for CdS/TiO2. Herein, MoS2/CdS/TiO2 composites were synthesized by one-step solvothermal method at 200 °C and applied to photocatalytic reduction of U(VI) from aqueous solutions. The batch characterizations showed the irregular spherical MoS2/CdS/TiO2 composites with low bandgap (1.95 eV) and high chemical stability. MoS2/CdS/TiO2 composites displayed the rapid removal rate of U(VI) (more than 90 % under 15 min illumination), good regeneration (> 91 % after four cycles) due to the highly efficient separation of electron-hole pair. The possible photocatalytic pathway was demonstrated to be the main active ·O2− radical by quenching experiments, ESR and XPS analysis. This work highlights the potential application of MoS2/CdS/TiO2 on removal of radioactive wastewater in the actual remediation.
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