ChemInform Abstract: DIRECT OBSERVATION OF SULFUR COORDINATION IN BEAN PLASTOCYANIN BY X-RAY PHOTOELECTRON SPECTROSCOPY

In a process of bioleaching of sulfides, the surface of target mineral is sometimes covered with intermediates and final products to interfere the extraction of metal. Understanding characterization and formation order of secondary minerals, which are responsible for passivation, is a key to resolve the passivation. In the present article, identification of secondary minerals and intermediates in a process of bioleaching of several sulfides by X-ray photoelectron spectroscopy, Raman spectroscopy, identification of jarosite group minerals using Raman spectroscopy, and expectation of formation order of secondary minerals by SEM-EDX and TEM observation are overviewed. Direct observation of a nanodomain by TEM provided a useful information on amorphous secondary minerals. In bioleaching of arsenic-bearing copper sulfides, which are expected to be a new target in the near future, a passivation model was proposed to keep maximizing Cu recovery and minimizing As solubilization, based on combination of solid characterization with aqueous observation.

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Direct observation of the energetics at a semiconductor/liquid junction by operando X-ray photoelectron spectroscopy

Energy & Environmental Science ◽

10.1039/c5ee01014d ◽

2015 ◽

Vol 8 (8) ◽

pp. 2409-2416 ◽

Cited By ~ 87

Author(s):

Michael F. Lichterman ◽

Shu Hu ◽

Matthias H. Richter ◽

Ethan J. Crumlin ◽

Stephanus Axnanda ◽

...

Keyword(s):

Direct Observation ◽

Photoelectron Spectroscopy ◽

Liquid Junction ◽

Band Bending ◽

X Ray

Via operandoXPS, band bending, pinning, and other properties are observed.

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Direct observation of the anderson transition in hxwo3 bronzes by high-resolution x-ray photoelectron spectroscopy

Chemical Physics Letters ◽

10.1016/0009-2614(80)85173-6 ◽

1980 ◽

Vol 74 (2) ◽

pp. 341-344 ◽

Cited By ~ 14

Author(s):

G. Hollinger ◽

P. Pertosa

Keyword(s):

High Resolution ◽

Direct Observation ◽

Photoelectron Spectroscopy ◽

X Ray ◽

Anderson Transition

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Direct Observation of Monolayer Zones in Al-wt 4% Cu

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100178823 ◽

1990 ◽

Vol 48 (1) ◽

pp. 14-15

Author(s):

B. Jouffrey ◽

D. Dorignac ◽

A. Bourret

Keyword(s):

Solid Solution ◽

Synchrotron Radiation ◽

Direct Observation ◽

Supersaturated Solid Solution ◽

Original Model ◽

X Ray ◽

Image Position

Since the early works on GP zones and the model independently proposed by Preston and Guinier on the first steps of precipitation in supersaturated solid solution of aluminium containing a few percent of copper, many works have been performed to understand the structure of different stages in the sequence of precipitation.The scheme which is generally admitted can be drawn from a work by Phillips.In their original model Guinier and Preston analysed a GP zone as composed of a single (100) copperrich plane surrounded by aluminum atomic planes with a slightly shorter distance from the original plane than in the solid solution.From X-ray measurements it has also been shown that GP1 zones were not only copper monolayer zones. They could be up to a few atomic planes thick. Different models were proposed by Guinier, Gerold, Toman. Using synchrotron radiation, proposals have been recently made.

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