EFFECT OF ANNEALING TEMPERATURE ON BROAD LUMINESCENCE OF SILVER-EXCHANGED ZEOLITES Y and A
Abstract
The annealing temperature dependence of luminescence properties of silver (Ag) exchanged zeolites Y and A was studied. It was found that the absorbance and excitation/emission bands are strongly affected by the thermal treatments. With increase in annealing temperature, the absorbance of Ag in zeolite Y increases at first and then decreases. However, the position of the excitation/emission band in zeolite Y was found to be insensitive to the annealing temperature. In contrast, the excitation/emission bands in zeolite A are particularly sensitive to the annealing temperature. The difference of such temperature dependence in zeolites Y and A may be due to the different microporous structure of the two minerals. Moreover, the fact that this dependence is not observed in Ag-exchanged zeolite Y is likely to be due to the difficulty in dehydration of zeolite Y in air or due to the weak Ag+-Ag+ interaction in zeolite Y.
About the Authors
Sa Chu Gui
College of Engineering, Bohai University
Russian Federation
Russian Federation
H. . Lin
Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology
Russian Federation
Russian Federation
W. . Bao
College of Engineering, Bohai University
Russian Federation
Russian Federation
W. . Wang
College of Engineering, Bohai University
Russian Federation
Russian Federation
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Review
For citations:
Gui S.Ch., Lin H., Bao W., Wang W. EFFECT OF ANNEALING TEMPERATURE ON BROAD LUMINESCENCE OF SILVER-EXCHANGED ZEOLITES Y and A. Zhurnal Prikladnoii Spektroskopii. 2018;85(2):212-218. (In Russ.)
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