Xu Yachao, Zhang Hongsen, Liu Qi, Liu Jingyuan, Chen Rongrong, Yu Jing, Zhu Jiahui, Li Rumin, Wang Jun
Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China; College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China; Key Laboratory of Marine Special Materials, Ministry of Industry and Information Technology, China.
Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China; College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China; Key Laboratory of Marine Special Materials, Ministry of Industry and Information Technology, China.
J Hazard Mater. 2021 Aug 15;416:125812. doi: 10.1016/j.jhazmat.2021.125812. Epub 2021 Apr 6.
It is still a challenge to obtain uranium (U) adsorbents with high selectivity, excellent cycle stability and excellent performance through design and synthesis. In this paper, the TiO/CPAN-AO catalyst was prepared by the hydrothermal method combined with high temperature cyclization dehydrogenation. TiO/CPAN-AO has excellent photocatalytic properties, which can reduce U(VI) to U(IV) quickly and selectively. The generated Z-type heterojunction promotes the reduction ability of photogenerated electrons, and obtains great selectivity to UO (Uranyl ions) through the AO group. TiO/CPAN-AO with π-electron conjugated structure broadens the spectral range through surface hybridization and prolongs the lifetime of photo-generated charges. Under the induction of light, the uranium extraction capacity of TiO/CPAN-AO after 5 h of irradiation is about 2.38 g/g. TiO/CPAN-AO is a catalyst with enhanced adsorption capacity, making it possible to extract uranium from large-scale natural seawater in the future.
通过设计和合成获得具有高选择性、优异循环稳定性和卓越性能的铀（U）吸附剂仍然是一项挑战。本文采用水热法结合高温环化脱氢制备了TiO/CPAN-AO催化剂。TiO/CPAN-AO具有优异的光催化性能，能够快速、选择性地将U(VI)还原为U(IV)。生成的Z型异质结促进了光生电子的还原能力，并通过AO基团对铀酰离子（UO）具有很高的选择性。具有π电子共轭结构的TiO/CPAN-AO通过表面杂化拓宽了光谱范围，并延长了光生电荷的寿命。在光的诱导下，照射5小时后TiO/CPAN-AO的铀提取量约为2.38 g/g。TiO/CPAN-AO是一种吸附能力增强的催化剂，使得未来从大规模天然海水中提取铀成为可能。
