Xueping Chen,Hao Li,Kaiwen Yang,Abdul Haleem,Yonghui Sun,Jianming Pan
Uranium, as the most essential resource for nuclear power production, provides 13% of global electricity demand, has attracted considerable attention. However, it is still a great challenge for uranium extraction from natural water like salt lakes as the background of high salinity and low concentration (3.3 ∼ 330 ppb). Meanwhile, current uranium extraction strategies are generally focus on extraction capacity or selectivity but neglect to enhance extraction rate. In this work, we designed a novel kind of NIR-driven intelligent nanorobots catchers (MSSA-AO) with amidoxime as claws for uranium capture, which showed almost 100% extraction rate and an ultrafast extraction rate. Importantly, high extraction capacity (221.5 mg g −1 ) and selectivity were taken into consideration as well as good regeneration performance. Furthermore, amidoxime NRCs boosted in extraction amount about 16.7% during the first 5 min with self-driving performance. Overall, this work suggests a new strategy for ultrafast extraction of uranium from natural water with low abundance selectively by self-propelled NRCs, showing great possibility in outdoor application and promising for meeting huge energy needs globally.
Tianyi Huang,Shafqat Ullah,Guangsheng Luo,Yujun Wang
The sol–gel technique combined with microfluidics is an effective approach for the preparation of microspheres. The formation and solidification of the sol can be influenced by the motion and extraction processes. The effects of extraction and motion were investigated using a real-time moisture content test, in situ observations, and CFD simulations. The microspheres retained their homogeneous internal structure with a narrow pore distribution when the extraction rate was less than 1 × 10 −4 ml/min·mm 2 , whereas extraction rates greater than 2 × 10 −4 ml/min·mm 2 resulted in clear hollows and stacking. A continuous phase devoid of extraction capability results in an internal hierarchy and bimodal pore size. Higher surface tension (greater than 4 mN/m) and lower fluid shear forces promoted high sphericity. These novel methods offer a promising approach for the preparation of alumina microspheres with a high spherical degree of 0.987 by matching the motion and extraction curing techniques.
危险品化学品经营许可证（带存储）