Abstract
The photocatalytic is a safe, efficient, and environmentally friendly technology for uranium (VI) removal. In this study, MoS2 and P doped g-C3N4 nanocomposites (MPCN) were obtained by ultrasonic chemical method, and further characterized by XRD, SEM, TEM, XPS and several photoelectrochemical techniques. The introduction of MoS2 and incorporation of P atoms could increase visible light absorption and accelerate the interfacial charge transfer of MPCN. The MPCN containing 3% MoS2 (3% MPCN) exhibited the highest photocatalytic performance, resulting in a reduction rate of 0.1265 min−1, which is 5.6 times higher than that of pure g-C3N4. Furthermore, the reduction of U(VI) was activated by both photoinduced electrons and •O2- radicals, and the reduction products was confirmed as (UO2) O2·2H2O species. This element doped heterojunction photocatalyst and the mechanism of uranium photoreduction under air condition may bring new insight for radionuclides treatment.
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