文献类型：期刊文献

英文题名：

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

作者：Cai, Yawen[1,2];Zhang, Yifeng[1];Lv, Zhimin[1];Zhang, Shuo[1];Gao, Feixue[1];Kong, Mingguang[3];Liu, Peisheng[4];Tan, Xiaoli[1];Hu, Baowei[2];Wang, Xiangke[1]

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

年份：2022

卷号：310

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：SCI-EXPANDED(收录号：WOS:000798990900002)、、EI(收录号：20221311851963)、Scopus(收录号：2-s2.0-85127012062)、WOS

基金：Financial supports from National Natural Science Foundation of China (21876047) , National Key Research and Development Program of China (2018YFC1900105) , Science Challenge Project (TZ2016004) , the Beijing Outstanding Young Scientist Program and the Thousand Talents Plan of Qinghai province.

语种：英文

外文关键词：Piezo catalysis; Adsorption-reduction-peroxidation reaction; U(VI); (UO2)O-2.2H2O; Zn2SnO4/SnO2

外文摘要：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.