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1. Absorption and desorption of SO2 in aqueous solutions of diamine-based molten salts

Author:
Seung Rok Lim; Junhyeok Hwang; Chang Soo Kim; Ho Seok Park; Minserk Cheong; Hoon Sik Kim; Hyunjoo Lee
Source:
Journal of hazardous materials 2015 v.289 pp. 63-71
ISSN:
0304-3894
Subject:
X-ray diffraction; absorption; anions; aqueous solutions; cations; chlorides; desorption; octane; spectroscopy; sulfates; sulfur dioxide
Abstract:
... SO2 absorption and desorption behaviors were investigated in aqueous solutions of diamine-derived molten salts with a tertiary amine group on the cation and a chloride anion, including butyl-(2-dimethylaminoethyl)-dimethylammonium chloride ([BTMEDA]Cl, pKb=8.2), 1-butyl-1,4-dimethylpiperazinium chloride ([BDMP]Cl, pKb=9.8), and 1-butyl-4-aza-1-azoniabicyclo[2,2,2]octane chloride ([BDABCO]Cl, pKb=1 ...
DOI:
10.1016/j.jhazmat.2015.02.022

2. Hydrothermal synthesis of magnetic wood composites and improved wood properties by precipitation with CoFe₂O₄/hydroxyapatite

Author:
Wentao Gan; Likun Gao; Xianxu Zhan; Jian Li
Source:
RSC advances 2015 v.5 no.57 pp. 45919-45927
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; absorption; adsorption; alkali treatment; anions; calcium; cations; electromagnetic radiation; electrostatic interactions; energy-dispersive X-ray analysis; heavy metals; hydroxyapatite; improved wood; magnetism; mechanical properties; moieties; nanoparticles; scanning electron microscopy; thermal stability; wood; wood properties
Abstract:
... Magnetic wood would have potential uses in electromagnetic shielding, indoor electromagnetic wave absorption and heavy metal adsorption. In this study, magnetic wood composites with improved thermal stability and mechanical properties as well as UV resistance were prepared by modification with magnetic CoFe₂O₄ and hydroxyapatite (HAP) via a hydrothermal process. The functional groups and morpholog ...
DOI:
10.1039/c5ra06138e

3. One-step synthesis of CDTA coated magnetic nanoparticles for selective removal of Cu(II) from aqueous solution

Author:
Haixia Lü; Xiaoming Wang; Jingqi Yang; Zenghong Xie
Source:
International journal of biological macromolecules 2015 v.78 pp. 209-214
ISSN:
0141-8130
Subject:
X-ray diffraction; absorption; adsorbents; adsorption; anions; aqueous solutions; atomic absorption spectrometry; cations; copper; lakes; magnetite; nanoparticles; pH; scanning electron microscopy; solid phase extraction
Abstract:
... A novel 1,2-cyclohexylenedinitrilotetraacetic acid (CDTA) modified Fe3O4 magnetic nanoparticles (MNPs) was synthesized by one-step solvothermal method and used as solid phase extraction (SPE) material to preconcentrate trace copper coupled with flame atomic absorption spectrometry (FAAS). The synthesized adsorbents were characterized by field emission scanning electron microscopy and X-ray powder ...
DOI:
10.1016/j.ijbiomac.2015.03.065

4. Temperature-Induced Molecular Rearrangement of an Ionic Liquid Confined in Nanospaces: An in Situ X-ray Absorption Fine Structure Study

Author:
Jiang Fangling; Li Cheng; Fu Haiying; Wang Chenyang; Guo Xiaojing; Jiang Zheng; Wu Guozhong; Chen Shimou
Source:
The Journal of Physical Chemistry C 2015 v.119 no.39 pp. 22724-22731
ISSN:
1932-7455
Subject:
Raman spectroscopy; X-radiation; X-ray diffraction; absorption; ambient temperature; anions; bromine; carbon nanotubes; cations; encapsulation; ionic liquids; solidification
Abstract:
... A temperature-dependent X-ray absorption fine structure (XAFS) study was performed to investigate structural changes in the 1-hexyl-3-methylimidazolium bromine (C₆mimBr) ionic liquid (IL) confined within the channels of multiwalled carbon nanotubes (MWCNTs). The XAFS spectra at room temperature confirmed the charge transfer from the bromine anion of the encapsulated IL to the MWCNTs. R-space analy ...
DOI:
10.1021/acs.jpcc.5b07325

5. A new, low-cost adsorbent: Preparation, characterization, and adsorption behavior of Pb(II) and Cu(II)

Author:
Gailing Huang; Dong Wang; Shulan Ma; Junli Chen; Ling Jiang; Peiyuan Wang
Source:
Journal of colloid and interface science 2015 v.445 pp. 294-302
ISSN:
0021-9797
Subject:
X-ray diffraction; absorption; adsorbents; adsorption; anions; byproducts; calcium; cations; copper; hydroxides; lead; lignin; lithium; models; potassium; pulp and paper industry; sodium; sorption isotherms; wastes; wastewater treatment; water pollution
Abstract:
... This work aimed to develop waste (i.e., sulfonated lignin) application in simulated wastewater treatment. Sulfonated lignin (LS), a byproduct of the paper industry, was intercalated into a parent host of layered double hydroxides (LDH) by swelling–restacking method. X-ray diffraction patterns of the composite confirmed that long-chain LS anions exited in the interlayer of Mg2Al–LDH in two forms: ( ...
DOI:
10.1016/j.jcis.2014.12.099

6. Unique Effects of the Chain Lengths and Anions of Tetra-alkylammonium Salts on Quenching Pyrene Excimer

Author:
Jang Hyun-Sook; Zhao Jing; Lei Yu; Nieh Mu-Ping
Source:
ACS Applied Materials & Interfaces 2014 v.6 no.17 pp. 14801-14811
ISSN:
1944-8252
Subject:
X-ray diffraction; absorption; anions; cations; chemical elements; evaporation; fluorescence; fluorescence emission spectroscopy; hydrophobicity; nuclear magnetic resonance spectroscopy; salts; scanning electron microscopy; solvents; temperature; tetrabutylammonium compounds
Abstract:
... Pyrene (Py) excimer, through its unique fluorescence quenching, exhibits high sensitivity and high selectivity in detecting specific electron-deficient molecules, providing a potential platform for sensing technology, optical switch, and probing hydrophobicity of molecular environment. In solution state, its quenching mechanism has been well-studied. However, there remain many unknown properties r ...
DOI:
10.1021/am504953a

7. Biogenic N-P-codoped TiO₂: Synthesis, characterization and photocatalytic properties

Author:
Han, Ting; Fan, Tongxiang; Chow, Suk-Kwun; Zhang, Di
Source:
Bioresource technology 2010 v.101 no.17 pp. 6829-6835
ISSN:
0960-8524
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; absorption; anions; cations; crops; crystals; irradiation; lamps; metals; nitrogen; oxides; phosphorus; red light; seeds
Abstract:
... Four typical kinds of crop seeds are studied as non-metallic bio-precursors to synthesize biogenic N-P-codoped TiO₂ (BNP-TiO₂). The as-prepared BNP-TiO₂ samples are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), nitrogen-adsorption measurement and UV-Vis spectroscopy. The results show that BNP-TiO₂ possesses single anatase phase with mesopore structures, and nitr ...
DOI:
10.1016/j.biortech.2010.03.107