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A COMPARATIVE TRANSMISSION ELECTRON MICROSCOPY INVESTIGATION OF DEFECTS AND TEXTURES IN CRYPTOMELANE

Barrett, Heather A
http://rave.ohiolink.edu/etdc/view?acc_num=miami1375787636

Abstract Details

2013, Master of Science, Miami University, Geology and Environmental Earth Science.
Cryptomelane is a Mn-oxide of great environmental importance that occurs in low temperature and other geologic environments. Cryptomelane is of great interest because of its cation exchange capacity and catalytic properties in synthetic form. This investigation is the first detailed transmission electron microscopy study to focus specifically on microtexture and defects and to involve scanning transmission electron microscopy (STEM). Four samples of cryptomelane (a natural sample from the Xiangtan manganese deposit in China, a synthetic produced by an aqueous route, a Zn-doped synthetic, and a battery derived synthetic) have been investigated and compared. This study indicates that although in general cryptomelane has defects and textures that are common amongst multiple samples, there are differences that are a function of composition and origin and these defects impact application performance. The results provide structure for future comparative interdisciplinary study that may enable production of a new material group useful for reducing pollution in several settings.
MARK KREKELER, PHD (Advisor)
JOHN RAKOVAN, PHD (Committee Member)
HAILANG DONG, DONG (Committee Member)
132 p.
Environmental Geology; Environmental Science; Geology
electron microscopy, TEM, cryptomelane, Mn-oxides, battery, recycling

Recommended Citations

Citations

  • Barrett, H. A. (2013). A COMPARATIVE TRANSMISSION ELECTRON MICROSCOPY INVESTIGATION OF DEFECTS AND TEXTURES IN CRYPTOMELANE [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1375787636

    APA Style (7th edition)

  • Barrett, Heather . A COMPARATIVE TRANSMISSION ELECTRON MICROSCOPY INVESTIGATION OF DEFECTS AND TEXTURES IN CRYPTOMELANE. 2013. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1375787636.

    MLA Style (8th edition)

  • Barrett, Heather . "A COMPARATIVE TRANSMISSION ELECTRON MICROSCOPY INVESTIGATION OF DEFECTS AND TEXTURES IN CRYPTOMELANE." Master's thesis, Miami University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=miami1375787636

    Chicago Manual of Style (17th edition)

miami1375787636
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© 2013, some rights reserved.Creative Commons License A COMPARATIVE TRANSMISSION ELECTRON MICROSCOPY INVESTIGATION OF DEFECTS AND TEXTURES IN CRYPTOMELANE by Heather A Barrett is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Miami University and OhioLINK.