Thermochromism in sodium-loaded zeolite FAU(1.25)

Autor:	Testuya Kodaira, S. Kazama, Shinichi Masubuchi, Hiroshi Kira, Yutaka Maniwa, Toshifumi Minamisawa
Rok vydání:	2006
Předmět:	Thermochromism chemistry Absorption band Sodium Analytical chemistry Brown color General Physics and Astronomy chemistry.chemical_element Physical and Theoretical Chemistry Atmospheric temperature range Absorption (chemistry) Zeolite Photochemistry
Zdroj:	Chemical Physics Letters. 424:97-100
ISSN:	0009-2614
DOI:	10.1016/j.cplett.2006.04.042
Popis:	Thermochromism was observed in sodium-loaded sodium-ion type zeolite FAU(1.25), Nax-Na85Al85Si107O384 with loading density x 8–10, in a temperature range of 300–600 K. With increasing x, the color of the pristine FAU powder changed dramatically from white to black via reddish brown at room temperature (RT). In the samples with intermediate loading densities, the reddish brown color reversibly changed to blue at high temperatures. Optical absorption measurements confirmed the thermochromism by observing a new absorption band around 1.7 eV at high temperatures. A possible mechanism related to the thermal conversion of cluster sites was discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d2ae68522bb65253f66e16717e3f60f9 https://doi.org/10.1016/j.cplett.2006.04.042 Zobrazit plný text záznamu Full Text from ScienceDirect