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Separation and Purification Technology

Separation and Purification Technology

IF: 8.09
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Simultaneous photocatalytic treatment of wastewater containing uranium (VI) and tannic acid by ultrathin Bi2WO6/Bi2MoO6 heterojunction

Published:3 December 2024 DOI: 10.1016/j.seppur.2024.130926
Feng He, Junhuan Tang, Qianxiang Xiao, Wen He, Qixu Chen, Ziyang Chang, Chongkun Zhao, Kai Liu, Hongqing Wang

Abstract

In uranium(VI) (U(VI)) photoreduction, it is still a challenge to simultaneously degrade naturally coexisting organics and explore their impact on U(VI) photoreduction. Meanwhile, how to boost the separation and transport capability of photo-induced carriers is also a hot topic of current research. In this work, an ultrathin Bi2WO6/Bi2MoO6 Z-type heterojunction was developed for the simultaneous treatment of U(VI) and its co-existing organics (tannic acid (TA)). Ultrathin interface engineering increased the contact area and shortened the transmission distance of photo-induced carriers. As a result, ultrathin Bi2WO6/Bi2MoO6 exhibited highly efficient U(VI) removal rate (95.8?%) and TA degradation rate (97.2?%), which were much higher than those of bulk Bi2WO6/Bi2MoO6 and single ultrathin Bi2WO6. In addition, the material possessed excellent stability and recyclability. Importantly, TA not only enhanced U(VI) removal by eliminating holes, but also favored U(VI) removal by serving as a bridge to the catalyst for U(VI) adsorption. Finally, a new mechanism was proposed.

Substances (6)

Materials
Procduct Name CAS Molecular Formula Supplier Price
D-Mannitol 69-65-8 C6H14O6 844 suppliers $5.00-$6490.00
Tannic acid 1401-55-4 C76H52O46 755 suppliers $10.00-$4499.30
Potassium bromide 7758-02-3 BrK 662 suppliers $1510.00
Mannitol 87-78-5 C6H14O6 436 suppliers Inquiry
Sodium molybdate dihydrate 10102-40-6 H2MoNaO5- 421 suppliers $9.00-$15960.00
Bismuth nitrate pentahydrate 10035-06-0 BiH10N3O14 295 suppliers $14.56-$4628.46

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