3D Cationic Polymeric Network Nanotrap for Efficient Collection of Perrhenate Anion from Wastewater

Small ◽  
2021 ◽  
pp. 2007994
Author(s):  
Xiaorui Li ◽  
Yiming Li ◽  
Huifang Wang ◽  
Zheng Niu ◽  
Yingjie He ◽  
...  
Keyword(s):  
Polymeric Network

scholarly journals Cationic Polymeric Networks: 3D Cationic Polymeric Network Nanotrap for Efficient Collection of Perrhenate Anion from Wastewater (Small 20/2021)

Small ◽  
2021 ◽  
Vol 17 (20) ◽  
pp. 2170094
Author(s):  
Xiaorui Li ◽  
Yiming Li ◽  
Huifang Wang ◽  
Zheng Niu ◽  
Yingjie He ◽  
...  
Keyword(s):  
Polymeric Network ◽  
Polymeric Networks

Tailored heptazine‐based porous polymeric network as versatile heterogeneous (photo)catalyst

2021 ◽  
Author(s):  
neha Sharma ◽  
Sunil Kumar ◽  
Venugopala Battula ◽  
Anu Kumari ◽  
Arkaprabha Giri ◽  
...  
Keyword(s):  
Photo Catalyst ◽  
Polymeric Network

scholarly journals EPR Spectroscopy Investigation of Cu2+Ions Adsorbed in Tannin-Formaldehyde Resins of Mimosa (Acacia mearnsii) Bark Extracts

2015 ◽  
Vol 2015 ◽  
pp. 1-5
Author(s):  
Marcelo H. Herbst ◽  
Ney V. Vugman
Keyword(s):  
Spectral Resolution ◽  
Epr Spectroscopy ◽  
Chemical Environment ◽  
Broad Line ◽  
Hyperfine Parameters ◽  
Acacia Mearnsii ◽  
Polymeric Network ◽  
Coordination Sites ◽  
Reversible Formation

The chemical environment of Cu2+ions adsorbed in tannin-formaldehyde resins ofAcacia mearnsiibark extracts, prepared from polybutene, is investigated by EPR spectroscopy at 300 K. The spectrum is simulated considering two isolated axial Cu(II) species (Species 1:A∥=16.50(5) mT,A⊥=1.20(10) mT,g∥=2.28(1), andg⊥=2.08(1); Species 2:A∥=15.00(5) mT,A⊥=1.50(10) mT,g∥=2.32(1), andg⊥=2.05(2)), superposed to a broad line (giso=2.14(1); linewidth = 30.0(5) mT) assigned to Cu(II) aggregates. Measurements at 77 K did not improve spectral resolution. Heating at 413 K changes the hyperfine parameters of Species 2 (A∥=14.20(5) mT,A⊥=1.20(10) mT,g∥=2.33(1), andg⊥=2.07(2)) and slightly modifies the parameters of the broad line (giso=2.11(2); linewidth = 40.00(50) mT) but does not change Species 1, assigned to Cu(II) species immobilized into resin pores in cathecolate-type coordination sites. Species 2 is assigned to Cu(II) species immobilized at the outer resin surface. Upon extended heating, a reversible formation of semiquinone-type paramagnetic radicals (giso=2.0037(1)) is observed, assigned to the partial collapse of the resin polymeric network.

Water absorption in a polymeric network

1996 ◽  
Vol 211 (1) ◽  
pp. 219-224 ◽  
Author(s):  
A. Domján ◽  
B. Iván ◽  
K. Süvegh ◽  
A. Vértes
Keyword(s):  
Water Absorption ◽  
Polymeric Network
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