Synergy of photocatalytic reduction and adsorption for boosting uranium removal with PMo12/UiO-66 heterojunction

In this work, we proposed a new U(VI) removal strategy combining adsorption and photocatalytic reduction by the PMo12/UiO-66 heterojunctions. The PMo12 has been encapsulated in the cavities of UiO-66 by a one-step hydrothermal method, and the PMo12/UiO-66 exhibited high adsorption capacity and photo...

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Bibliographic Details
Published in:Chinese chemical letters 2022-07, Vol.33 (7), p.3577-3580
Main Authors: Zhang, Zhibin, Li, Zifan, Dong, Zhimin, Yu, Fengtao, Wang, Yingcai, Wang, Youqun, Cao, Xiaohong, Liu, Yuhui, Liu, Yunhai
Format: Article
Language:English
Subjects:
Adsorption
Photocatalytic reduction
PMo12
UiO-66
Uranium
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Summary:In this work, we proposed a new U(VI) removal strategy combining adsorption and photocatalytic reduction by the PMo12/UiO-66 heterojunctions. The PMo12 has been encapsulated in the cavities of UiO-66 by a one-step hydrothermal method, and the PMo12/UiO-66 exhibited high adsorption capacity and photocatalytic activity. The maximal theoretical sorption capacity of U(VI) on 15% PMo12/UiO-66 reached 225.36 mg/g and the photoreduction rate of 15% PMo12/UiO-66 is about thirty times as much as UiO-66. Under the light irradiation, the photogenerated electrons rapidly transport from UiO-66 to PMo12, and the photo-generated electrons could efficiently reduce the pre-enriched U(VI) to U(IV). This work provides new insights into remediation of the radioactive environment. The encapsulation of PMo12 in the cavities of UiO-66 could boost both adsorption and photocatalysis for the extraction of U(VI). [Display omitted]
ISSN:1001-8417
1878-5964
DOI:10.1016/j.cclet.2022.01.062