Affordable Access

Access to the full text

A wood-mimetic porous MXene/gelatin hydrogel for electric field/sunlight bi-enhanced uranium adsorption

Authors
  • Chen, Lin
  • Sun, Ye
  • Wang, Jiawen
  • Ma, Chao
  • Peng, Shuyi
  • Cao, Xingyu
  • Yang, Lang
  • Ma, Chunxin
  • Duan, Gaigai
  • Liu, Zhenzhong
  • Wang, Hui
  • Yuan, Yihui
  • Wang, Ning
Type
Published Article
Journal
e-Polymers
Publisher
De Gruyter
Publication Date
May 05, 2022
Volume
22
Issue
1
Pages
468–477
Identifiers
DOI: 10.1515/epoly-2022-0045
Source
De Gruyter
Keywords
Disciplines
  • Research Article
License
Green

Abstract

Although diverse uranium (U) adsorbents have been explored, it is still a great challenge for high-efficient uranium extraction form seawater. Herein a wood-mimetic oriented porous Ti3C2T x -MXene/gelatin hydrogel (MGH) has been explored through growing directional ice crystals cooled by liquid nitrogen and subsequently forming pores by freeze-dry (Ice-template) method, for ultrafast and high-efficient U-adsorption from seawater with great enhancement by both electric field and sunlight. Different from disperse Ti3C2T x -MXene powder, this MGH not only can be easily utilized but also can own ultrahigh specific surface area for high-efficient U-adsorption. The U-adsorbing capacity of this MGH (10 mg) can reach 4.17 mg·g−1 after only 1 week in 100 kg of seawater, which is outstanding in existing adsorbents. Furthermore, on the positive pole of 0.4 V direct current source or under 1-sun irradiation, the U-adsorbing capacity of the MGH can increase by 57.11% and 13.57%, respectively. Most importantly, the U-adsorption of this hydrogel can be greatly enhanced by simultaneously using the above two methods, which can increase the U-adsorbing capacity by 79.95% reaching 7.51 mg·g−1. This work provides a new biomimetic porous MXene-based hydrogel for electric field/sunlight bi-enhanced high-efficient U-extraction from seawater, which will inspire new strategy to design novel U-adsorbents and systems.

Report this publication

Statistics

Seen <100 times