A wood-mimetic porous MXene/gelatin hydrogel for electric field/sunlight bi-enhanced uranium adsorption
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
Affiliations
Chen Lin
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China
Sun Ye
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China
Wang Jiawen
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China
Ma Chao
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China
Peng Shuyi
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China
Cao Xingyu
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China
Yang Lang
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China
Ma Chunxin
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China
Duan Gaigai
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
Liu Zhenzhong
Research Institute of Zhejiang University-Taizhou, Taizhou 318000, China
Wang Hui
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China
Yuan Yihui
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China
Wang Ning
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China
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 Ti3C2Tx-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 Ti3C2Tx-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.
