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Your search keyword '"Wang, Jianfang"' showing total 16 results
Start Over Author "Wang, Jianfang" Journal angewandte chemie
16 results on '"Wang, Jianfang"'

5. Photodriven Disproportionation of Nitrogen and Its Change to Reductive Nitrogen Photofixation.

Author

Yang, Jianhua, Bai, Haoyuan, Guo, Yanzhen, Zhang, Han, Jiang, Ruibin, Yang, Baocheng, Wang, Jianfang, and Yu, Jimmy C.

Subjects
GOLD nanoparticles, NITROGEN fixation, NITROGEN, VISIBLE spectra, MICROSPHERES, TITANIUM dioxide
Abstract

Nitrogen fixation is an essential process for sustaining life. Tremendous efforts have been made on the photodriven fixation of nitrogen into ammonia. However, the disproportionation of dinitrogen to ammonia and nitrate under ambient conditions has remained a grand challenge. In this work, the photodriven disproportionation of nitrogen is realized in water under visible light and ambient conditions using Fe‐doped TiO2 microspheres. The oxygen vacancies associated with the Fe dopants activate chemisorbed N2 molecules, which can then be fixed into NH3 with H2O2 as the oxidation product. The generated H2O2 thereafter oxidizes NH3 into nitrate. This disproportionation reaction can be turned to the reductive one by loading plasmonic Au nanoparticles in the doped TiO2 microspheres. The generated H2O2 can be effectively decomposed by the Au nanoparticles, resulting in the transformation of the disproportionation reaction to the completely reductive nitrogen photofixation. [ABSTRACT FROM AUTHOR]

Published
2021
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6. Direct Monitoring of Cell Membrane Vesiculation with 2D AuNP@MnO2 Nanosheet Supraparticles at the Single‐Particle Level.

Author

Ling, Yunyun, Zhang, Di, Cui, Ximin, Wei, Meimei, Zhang, Ting, Wang, Jianfang, Xiao, Lehui, and Xia, Yunsheng

Subjects
CELL membranes, SURFACE plasmon resonance, GOLD nanoparticles, REFRACTIVE index, PLASMONICS
Abstract

We herein demonstrate robust two‐dimensional (2D) UFO‐shaped plasmonic supraparticles made of gold nanoparticles (AuNPs) and MnO2 nanosheets (denoted as AMNS‐SPs) for directly monitoring cell membrane vesiculation at the single‐particle level. Because the decorated MnO2 nanosheets are ultrathin (4.2 nm) and have large diameters (230 nm), they are flexible enough for deformation and folding for parceling of the AuNPs during the endocytosis process. Correspondingly, the surrounding refractive index of the AuNPs increases dramatically, which results in a distinct red‐shift of the localized surface plasmon resonance (LSPR). Such LSPR modulation provides a convenient and accurate means for directly monitoring the dynamic interactions between 2D nanomaterials and cell membranes. Furthermore, for the endocytosed AMNS‐SPs, the subsequent LSPR blue‐shift induced by etching effects of reducing molecules is promising for exploring the local environment redox states at the single‐cell level. [ABSTRACT FROM AUTHOR]

Published
2019
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