Highly efficient uranium extraction by a piezo catalytic reduction-oxidation process

被引：109

作者：

Cai, Yawen ^{[1
,2
]}

Zhang, Yifeng ^{[1
]}

Lv, Zhimin ^{[1
]}

Zhang, Shuo ^{[1
]}

Gao, Feixue ^{[1
]}

Fang, Ming ^{[1
]}

Kong, Mingguang ^{[3
]}

Liu, Peisheng ^{[4
]}

Tan, Xiaoli ^{[1
]}

Hu, Baowei ^{[2
]}

Wang, Xiangke ^{[1
,2
]}

机构：

[1] North China Elect Power Univ, Coll Environm Sci & Engn, Beijing 102206, Peoples R China

[2] Shaoxing Univ, Sch Life Sci, Shaoxing 312000, Peoples R China

[3] Chinese Acad Sci, Inst Solid State Phys, Hefei 230031, Peoples R China

[4] Nantong Univ, Sch Informat Sci & Technol, Nantong 226019, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2022年 / 310卷

基金：

中国国家自然科学基金;

关键词：

Piezo catalysis; Adsorption-reduction-peroxidation reaction; U(VI); (UO2)O-2.2H2O; Zn2SnO4/SnO2; HYDROGEN-PEROXIDE; DEGRADATION; SEAWATER; STABILITY; VIBRATION; U(VI);

D O I：

10.1016/j.apcatb.2022.121343

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, a highly efficient uranium extraction method from water by the piezo catalytic reduction-oxidation process is reported by utilizing a hollow cubic shaped Zn2SnO4/SnO2 as piezo catalyst. The electrons and holes in Zn2SnO4/SnO2 are separated efficiently under the irradiation of ultrasound. After that, some of the piezo electrons reduce the adsorbed U(VI) to UO2, the others react with soluble oxygen to form H2O2, and oxidize UO2 to generate (UO(2)2)(2), which could be efficiently separated from the solution. U(VI) piezo catalytic extraction rate could reach -90% under the irradiation of ultrasonic waves (40 kHz, 120 W) within 5 h and only decreased by -3% after four cycles. The present work advances piezo catalysis as a new route for uranium extraction from water, which may be applied in the extraction or removal of U(VI) in the U-containing wastewaters, providing new opportunities for resource-saving and environmental enhancement.

引用

页数：12

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