Chemistry Nexus

by WebElements: the periodic table on the web

The Science Blog reports that researchers at Penn State in the USA are developing self-cleaning titania nanotube hydrogen sensors. The hydrogen sensors are titania nanotubes coated with a discontinuous layer of palladium. Hydrogen sensors are widely used in the chemical, petroleum and semiconductor industries. They are also used as diagnostic tools to monitor certain types of bacterial infections.

“The photocatalytic properties of titania nanotubes are so large – a factor of 100 times greater than any other form of titania – that sensor contaminants are efficiently removed with exposure to ultraviolet light, so that the sensors effectively recover or retain their original hydrogen sensitivity in real world application”

“By doping the titania nanotubes with trace amounts of different metals such as tin, gold, silver, copper, niobium and others, a wide variety of chemical sensors can be made.

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December 9th, 2009

Posted In: Chemistry

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Hard to know what to make of this as it is not my field. But here is a claim for element 122, or maybe 124, detection in thorium by a mass spectrometric method.1 The authors have claimed previously the observation of very heavy isotopes, for instance Rg isotopes in the mass spectra of natural gold.

Abstract:1 Evidence for the existence of a superheavy nucleus with atomic mass number A=292 and abundance (1-10) x 10-12 relative to 232Th has been found in a study of natural Th using inductively coupled plasma-sector field mass spectrometry.

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September 1st, 2008

Posted In: Chemistry, Nuclear chemistry

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