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Your search keyword '"Yuan, Yihui"' showing total 392 results
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392 results on '"Yuan, Yihui"'

1. Recent progress of radionuclides separation by porous materials

Author

Xie, Yinghui, Yu, Long, Chen, Long, Chen, Cheng, Wang, Li, Liu, Fenglei, Liao, Yun, Zhang, Peng, Chen, Tao, Yuan, Yihui, Lu, Yuexiang, Huang, Boyang, Yang, Hui, Wang, Suhua, Wang, Shuao, Ma, Lijian, Luo, Feng, Liu, Yunhai, Hu, Baowei, Wang, Hongqing, Pan, Duoqiang, Zhu, Wenkun, Wang, Ning, Wang, Zhe, Mao, Liang, Ma, Shengqian, and Wang, Xiangke

Published
2024
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22. A wood-mimetic porous MXene/gelatin hydrogel for electric field/sunlight bi-enhanced uranium adsorption

Author

Chen Lin, Sun Ye, Wang Jiawen, Ma Chao, Peng Shuyi, Cao Xingyu, Yang Lang, Ma Chunxin, Duan Gaigai, Liu Zhenzhong, Wang Hui, Yuan Yihui, and Wang Ning

Subjects
wood-mimetic macropores, hydrogels, mxenes, uranium extraction, seawater, Polymers and polymer manufacture, TP1080-1185
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 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.

Published
2022
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28. A poly(amidoxime)-modified MOF macroporous membrane for high-efficient uranium extraction from seawater

Author

Wang Jiawen, Sun Ye, Zhao Xuemei, Chen Lin, Peng Shuyi, Ma Chunxin, Duan Gaigai, Liu Zhenzhong, Wang Hui, Yuan Yihui, and Wang Ning

Subjects
uranium recovery from seawater, metal–organic frameworks, poly(amidoxime), graphene oxide, composite porous membrane, Polymers and polymer manufacture, TP1080-1185
Abstract

Although metal–organic frameworks (MOFs) own excellent uranium adsorption capacity but are still difficult to conveniently extract uranium from seawater due to the discrete powder state. In this study, a new MOF-based macroporous membrane has been explored, which can high-efficiently extract uranium through continuously filtering seawater. Through modifying the UiO-66 with poly(amidoxime) (PAO), it can disperse well in a N,N-dimethylformamide solution of graphene oxide and cotton fibers. Then, the as-prepared super-hydrophilic MOF-based macroporous membrane can be fabricated after simple suction filtration. Compared with nonmodified MOFs, this UiO-66@PAO can be dispersed uniformly in the membrane because it can stabilize well in the solution, which have largely enhanced uranium adsorbing capacity owing to the modified PAO. Last but not least, different from powder MOFs, this UiO-66@PAO membrane provides the convenient and continuously uranium adsorbing process. As a consequence, the uranium extraction capacity of this membrane can reach 579 mg·g−1 in 32 ppm U-added simulated seawater for only 24 h. Most importantly, this UiO-66@PAO membrane (100 mg) can remove 80.6% uranyl ions from 5 L seawater after 50 filtering cycles. This study provides a universal method to design and fabricate a new MOF-based adsorbent for high-efficient uranium recovery from seawater.

Published
2022
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35. Ultrasensitive optical detection of strontium ions by specific nanosensor with ultrahigh binding affinity.

Author

Du, Xinfeng, Xie, Hua, Qin, Tianyi, Yuan, Yihui, and Wang, Ning

Subjects
STABILITY constants, CHEMICAL detectors, RADIOACTIVE pollution, STRONTIUM ions, DETECTION limit
Abstract

The release and escape of radioactive materials has posed tremendous threats to the global environment. Among various radioactive elements, 90Sr has attracted growing attention due to its long half-life and its tendency to accumulate in bone tissue. Nonetheless, the concentration of 90Sr in radioactive waste is exceedingly low, far below the detection limits of currently available strontium-targeting chemical sensors. Herein, we propose an optical nanosensor (Sr2+-nanosensor) that exhibits an ultra-low detection limit of 0.5 nM, surpassing the 90Sr in the treated radioactive water from the Fukushima. The sensor offers wide sensing range of eight orders of magnitude, rapid response of less than 10 s, and high selectivity against 31 common ions. These excellent performances are attributed to a specific ligand (Sr2+-ligand) for Sr2+ recognition. The Sr2+ is found to be bound by six oxygen atoms from the Sr2+-ligand with a stability constant at least two orders higher than that of other traditional ligands. This study offers invaluable insights for the design of Sr2+-sensing methodologies as well as a technique for detecting trace amounts of environmental radioactive pollution. The release and escape of radioactive 90Sr has attracted growing attention due to its long half-life and its tendency to accumulate in bone tissue. Herein, the authors report an optical nanosensor (Sr2+-nanosensor) that exhibits an ultra-low detection limit of 0.5 nM, a rapid response of less than 10 s, and high selectivity against 31 common ions. [ABSTRACT FROM AUTHOR]

Published
2024
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