New Developments in Activation Analysis for Material and Environmental Sciences

1990 ◽  
Vol 37 (2) ◽  
pp. 101-115 ◽  
Author(s):  
Zeev B. Alfassi
Keyword(s):  
Activation Analysis ◽  
Environmental Sciences ◽  
New Developments

scholarly journals Major Advances and Challenges in Heterogeneous Catalysis for Environmental Applications: A Review

2018 ◽  
Vol 25 (1) ◽  
pp. 9-34 ◽  
Author(s):  
Stanisław Wacławek ◽  
Vinod V.T. Padil ◽  
Miroslav Černík
Keyword(s):  
Heterogeneous Catalysis ◽  
Sustainable Energy ◽  
Soil Treatment ◽  
Environmental Applications ◽  
Environmental Sciences ◽  
Short Introduction ◽  
New Developments ◽  
Historical Aspects ◽  
Small Section ◽  
Strongly Connected

Abstract Heterogeneous catalysis is one of the fastest developing branches of chemistry. Moreover, it is strongly connected to popular environment-related applications. Owing to the very fast changes in this field, for example, numerous discoveries in nanoscience and nanotechnologies, it is believed that an update of the literature on heterogeneous catalysis could be beneficial. This review not only covers the new developments of heterogeneous catalysis in environmental sciences but also touches its historical aspects. A short introduction to the mechanism of heterogeneous catalysis with a small section on advances in this field has also been elaborated. In the first part, recent innovations in the field of catalytic air, water, wastewater and soil treatment are presented, whereas in the second part, innovations in the use of heterogeneous catalysis for obtaining sustainable energy and chemicals are discussed. Catalytic processes are ubiquitous in all branches of chemistry and there are still many unsolved issues concerning them.

scholarly journals New Developments of Neutron Activation Analysis Applications

2015 ◽  
Vol 195 ◽  
pp. 2717-2725 ◽  
Author(s):  
Olga Shulyakova ◽  
Petr Avtonomov ◽  
Valeria Kornienko
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
New Developments

Quantitative nano-characterization of heterogeneous catalysts

1995 ◽  
Vol 53 ◽  
pp. 398-399
Author(s):  
P.A. Crozier ◽  
M. Pan
Keyword(s):  
Heterogeneous Catalysts ◽  
Low Dose ◽  
Imaging Techniques ◽  
Structural Features ◽  
Catalyst Characterization ◽  
New Developments ◽  
Double Phase ◽  
Phase Systems ◽  
Dose Imaging

Heterogeneous catalysts can be of varying complexity ranging from single or double phase systems to complicated mixtures of metals and oxides with additives to help promote chemical reactions, extend the life of the catalysts, prevent poisoning etc. Although catalysis occurs on the surface of most systems, detailed descriptions of the microstructure and chemistry of catalysts can be helpful for developing an understanding of the mechanism by which a catalyst facilitates a reaction. Recent years have seen continued development and improvement of various TEM, STEM and AEM techniques for yielding information on the structure and chemistry of catalysts on the nanometer scale. Here we review some quantitative approaches to catalyst characterization that have resulted from new developments in instrumentation.HREM has been used to examine structural features of catalysts often by employing profile imaging techniques to study atomic details on the surface. Digital recording techniques employing slow-scan CCD cameras have facilitated the use of low-dose imaging in zeolite structure analysis and electron crystallography. Fig. la shows a low-dose image from SSZ-33 zeolite revealing the presence of a stacking fault.

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