scholarly journals Polyaniline Nanoskein: Synthetic Method, Characterization, and Redox Sensing

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Yoochan Hong ◽  
Hyun Soo Kim ◽  
Taeha Lee ◽  
Gyudo Lee ◽  
Ohwon Kwon
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Photoelectron Spectroscopy ◽  
Redox State ◽  
Synthetic Method ◽  
X Ray ◽  
Polyaniline Nanofibers ◽  
Redox Sensing ◽  
State Changes ◽  
Acidic Environments

AbstractPolyaniline nanoskein (PANS), which have polyaniline nanofibers, was developed. PANS was formulated via sequential extracting, heating, and swelling processes. The compositions of PANS have been analyzed using X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and Brunauer–Emmett–Teller analysis, and the results of which indicate that PANS is composed of solely organic materials. Moreover, PANS has been shown convertible absorbance characteristics according to surrounding acidic environments, and using these characteristics, the possibility of PANS for sensing of surrounding redox state changes is presented.

scholarly journals Polyaniline Nanoskein: Synthetic Method, Characterization, and Redox Sensing

2020 ◽  
Author(s):  
Yoochan Hong ◽  
Hyun Soo Kim ◽  
Taeha Lee ◽  
Gyudo Lee ◽  
Ohwon Kwon
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Thermogravimetric Analysis ◽  
Photoelectron Spectroscopy ◽  
Synthetic Method ◽  
X Ray ◽  
Redox States ◽  
Polyaniline Nanofibers ◽  
Redox Sensing ◽  
Acidic Environments

Abstract Polyaniline nanoskein (PANS), which have polyaniline nanofibers, is developed. PANS is formulated via sequential extracting, heating, and swelling processes. The compositions of PANS have been analyzed using X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and Brunauer-Emmett-Teller analysis, and the results of which indicate that PANS is composed of solely organic materials. Moreover, PANS have been shown convertible absorbance characteristics according to surrounding acidic environments, and using these characteristics, the possibility of PANS for sensing of surrounding redox states changes is presented.

scholarly journals Polyaniline Nanoskein: Synthetic Method, Characterization, and Redox Sensing

2020 ◽  
Author(s):  
Yoochan Hong ◽  
Hyun Soo Kim ◽  
Taeha Lee ◽  
Gyudo Lee ◽  
Ohwon Kwon
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Thermogravimetric Analysis ◽  
Photoelectron Spectroscopy ◽  
Synthetic Method ◽  
X Ray ◽  
Redox States ◽  
Polyaniline Nanofibers ◽  
Redox Sensing ◽  
Acidic Environments

Abstract Polyaniline nanoskein (PANS), which have polyaniline nanofibers, is developed. PANS is formulated via sequential extracting, heating, and swelling processes. The compositions of PANS have been analyzed using X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and Brunauer-Emmett-Teller analysis, and the results of which indicate that PANS is composed of solely organic materials. Moreover, PANS have been shown convertible absorbance characteristics according to surrounding acidic environments, and using these characteristics, the possibility of PANS for sensing of surrounding redox states changes is presented.

scholarly journals Comprehension of paraquat adsorption on faujasite zeolite X and Y in sodium form

2017 ◽  
Vol 36 (1-2) ◽  
pp. 684-693 ◽  
Author(s):  
Wina Rongchapo ◽  
Chalermpan Keawkumay ◽  
Nattawut Osakoo ◽  
Krittanun Deekamwong ◽  
Narong Chanlek ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Photoelectron Spectroscopy ◽  
Fourier Transform Infrared ◽  
Magic Angle Spinning ◽  
Mas Nmr ◽  
Magic Angle ◽  
Zeolite X ◽  
X Ray

The nature of paraquat adsorption is compared between zeolite NaX and NaY which have the same faujasite structure but different Si/Al ratio, namely 1.2 and 2.2, respectively. The adsorption was proposed to occur via ion exchange and expected to increase with Al content. However, NaX had a lower paraquat adsorption capacity than NaY. The bare and paraquat-containing zeolites (PQX and PQY) were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, N2 adsorption–desorption analysis, magic-angle spinning nuclear magnetic resonance (MAS) NMR, and X-ray photoelectron spectroscopy. The presence of adsorbed paraquat was confirmed by Fourier transform infrared spectroscopy. Paraquat adsorbed in supercages of the zeolites resulting in a decrease of surface area and displacement of sodium cations. Results from 23Na MAS NMR and X-ray photoelectron spectroscopy indicated that interaction of sodium ions in the cavity of NaX was stronger than that in NaY, making it less exchangeable with paraquat.

Sign in / Sign up

Export Citation Format

Share Document