THz time-domain spectroscopy of selected molecular sieves and their related compounds

Tao Li; Chao Dai; Lu Tian; Qing Miao; Kun Zhao

doi:10.1117/12.919124

13 March 2012 THz time-domain spectroscopy of selected molecular sieves and their related compounds

Tao Li, Chao Dai, Lu Tian, Qing Miao, Kun Zhao

Proceedings Volume 8330, Photonics and Optoelectronics Meetings (POEM) 2011: Laser and Terahertz Science and Technology; 833015 (2012) https://doi.org/10.1117/12.919124
Event: Photonics and Optoelectronics Meetings 2011, 2011, Wuhan, China

Abstract

The spectral characteristics of selected molecular sieves (3A, 4A, 5A, 13X and synthetic zeolite) in a terahertz (THz) range were studied by THz time-domain spectroscopy technologies (THz-TDS). The chemical composition of a molecular sieve is M_x/n[(AlO₂)x·(SiO₂)y]·zH₂O, where M is metal cation and n is the valence of the metal cation. The absorption coefficients and refractive indices were extracted in the spectra. Different from that of the A-type molecular sieves, the absorption curves and refractive indices of synthetic zeolite and 13X molecular sieve display large fluctuation as the frequency change. In addition, two kinds of related compounds (Al₂O₃ and quartz sand) were studied by using THz-TDS. The Al₂O₃ shows weak absorption and quartz sand has three typical absorption peaks at 0.89, 1.3, 1.55 THz. The refractive index of Al₂O₃ is kept at about 1.27 while that of quartz sand show large fluctuations. The present results suggested that the THz spectra of molecular sieves are in dependent of their types and indicated the potential of THz technology for the molecular sieve industry.

Citation Download Citation

Tao Li, Chao Dai, Lu Tian, Qing Miao, and Kun Zhao "THz time-domain spectroscopy of selected molecular sieves and their related compounds", Proc. SPIE 8330, Photonics and Optoelectronics Meetings (POEM) 2011: Laser and Terahertz Science and Technology, 833015 (13 March 2012); https://doi.org/10.1117/12.919124

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available