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61 results on '"Wu, Mingmei"'

19. Corrigendum to “Synthesis and optimization of the trimesic acid modified polymeric carbon nitride for enhanced photocatalytic reduction of CO2”. [J. Colloid Interface Sci. 548 (2019) 197–205]

Author

Hayat, Asif, primary, Khan, Javid, additional, Rahman, Mati Ur, additional, Mane, Sunilkumar Baburao, additional, Khan, Wasim Ullah, additional, Sohail, Muhammad, additional, Rahman, Naveed Ur, additional, Shaishta, Naghma, additional, Chi, Zhenguo, additional, and Wu, Mingmei, additional

Published
2019
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31. Comparative Studies on Periodatocuprate(II, III) and Telluratocuprate(II, III)

Author

Ren Yufang, Wu Mingmei, Su Qiang, and Hu Gang

Subjects
Valence (chemistry), Chemistry, Stereochemistry, Binding energy, chemistry.chemical_element, Crystal structure, Condensed Matter Physics, Copper, Electronic, Optical and Magnetic Materials, Inorganic Chemistry, Bond length, Crystallography, Paramagnetism, X-ray photoelectron spectroscopy, Materials Chemistry, Ceramics and Composites, Physical and Theoretical Chemistry, Hydrate
Abstract

The crystal structures, electronic spectra, and Cu2p XPS of Cu(III) complexes Na4H[Cu(H2TeO6)(2)]. 17H(2)O and Na4K[Cu(HlO(6))(2)]. 12H(2)O have been described. The characterizations of a Cu(III) atom in a complex are as follows: (i) In a square-planar coordination, the average bond length of Cu-O is 0.183 nm, shorter than the 0.190-0.200 nm found for a Cu(II) complex. (2) The ''blue shift'' occurs for d-d transitions in the electronic spectrum of the Cu(III) complex compared to those of its related Cu(II) complex, resulting from the higher valence state. (3) Cu(III) compounds with CuO4 square-planar coordination are expected to be diamagnetic whereas Cu(II) compounds to be paramagnetic. (4) Comprehensive investigations on Cu2p XPS show that the binding energy of Cu2p(3/2) of a pure Cu(III) compound is about 2.0 eV higher than that of its corresponding Cu(II) compound: the shake-up satellites do not appear in the Cu2p XPS for a pure diamagnetic Cu(III) compound, the same as found for a diamagnetic Ni(II) compound: the FWHM of the signal of Cu2p XPS may become broader for Cu(III) compound because its core hole's lifetime shortens due to the higher valence state of copper. (C) 1995 Academic Press, Inc.

Published
1995

32. Preparation of periodatocuprate(III) and telluratocuprate(III) by electrochemical and ozone oxidation

Author

Wu Zhijiang, Hu Gang, Du Sinlin, Wu Mingmei, Ren Yufang, Su Qiang, and Cao Xue-qiang

Subjects
Aqueous solution, Ozone, Potash, Inorganic chemistry, Periodate, chemistry.chemical_element, Electrochemistry, Tellurate, Copper, Inorganic Chemistry, chemistry.chemical_compound, chemistry, X-ray photoelectron spectroscopy, Materials Chemistry, Physical and Theoretical Chemistry
Abstract

In the cyclic voltammograms of complexes with periodate and tellurate, the anodic and cathodic peaks were observed evidently for CuIII/CuII couples in caustic potash aqueous solutions. Copper(III) complexes were obtained by utilizing ozone as oxidant, and two new copper(III) complexes Ba3K[Cu(HIO6)2](KOH)0.5(OH)2·8H2O and Ba4K [Cu(H2TeO6)2](OH)4·6H2O were isolated from solutions, which were investigated via magnetic measurements, electronic spectra and Cu2p XPS.

Published
1994

33. Preparation and Properties of BaCuO2.5 and Its Related Oxides

Author

Wu Mingmei, Wang Hongyiang, Ren Yufang, Su Qiang, and Hu Gang

Subjects
Valence (chemistry), Chemistry, business.industry, Infrared spectroscopy, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Inorganic Chemistry, Crystallography, Semiconductor, Nuclear magnetic resonance, X-ray photoelectron spectroscopy, Electrical resistivity and conductivity, Powder metallurgy, Materials Chemistry, Ceramics and Composites, Orthorhombic crystal system, Angstrom, Physical and Theoretical Chemistry, business
Abstract

The compound BaCuO2.5 Was obtained using BaO2 and CuO as starting materials, and its various properties were investigated. It belongs to the orthorhombic system with a = 8.55 angstrom, b = 10.56 angstrom, and c = 7.62 angstrom. The p-type semiconductor Ba

Published
1994

44. Chemical constituents from Otochilus fuscus

Author

Wang, Liqin, primary, Wu, Mingmei, additional, Tang, Zhengrong, additional, Yang, Xunyun, additional, Lei, Yanmei, additional, Wang, Lin, additional, Yin, Benlin, additional, and Chen, Yegao, additional

Published
2012
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