التفاصيل البيبلوغرافية
| العنوان: |
Nanoscale Surface Compositions and Structures Influence Boron Adsorption Properties of Anion Exchange Resins. |
| المؤلفون: |
Manjunatha Reddy GN; Department of Chemical Engineering , University of California, Santa Barbara , Santa Barbara , California 93106 , United States., Gerbec JA; Mitsubishi Chemical-Center for Advanced Materials , University of California, Santa Barbara , Santa Barbara , California 93106 , United States., Shimizu F; Science and Innovation Center, Mitsubishi Chemical Corporation , Yokohama-shi , Kanagawa 227-8502 , Japan., Chmelka BF; Department of Chemical Engineering , University of California, Santa Barbara , Santa Barbara , California 93106 , United States. |
| المصدر: |
Langmuir : the ACS journal of surfaces and colloids [Langmuir] 2019 Dec 03; Vol. 35 (48), pp. 15661-15673. Date of Electronic Publication: 2019 Sep 03. |
| نوع المنشور: |
Journal Article |
| اللغة: |
English |
| بيانات الدورية: |
Publisher: American Chemical Society Country of Publication: United States NLM ID: 9882736 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1520-5827 (Electronic) Linking ISSN: 07437463 NLM ISO Abbreviation: Langmuir Subsets: PubMed not MEDLINE; MEDLINE |
| أسماء مطبوعة: |
Original Publication: Washington, DC : American Chemical Society, c1985- |
| مستخلص: |
Boron adsorption properties of poly(styrene- co -divinylbenzene) (PSDVB)-based anion-exchange resins with surface-grafted N -methyl-d-glucamine (NMDG) depend strongly on their local surface compositions, structures, and interfacial interactions. Distinct boron adsorption sites have been identified and quantified, and interactions between borate anions and hydroxyl groups of NMDG surface moieties have been established. A combination of X-ray photoelectron spectroscopy (XPS), solid-state nuclear magnetic resonance (NMR), and Fourier-transform infrared (FT-IR) spectroscopy were used to characterize the atomic-level compositions and structures that directly influence the adsorption of borate anions on the NMDG-functionalized resin surface. Surface-enhanced dynamic-nuclear-polarization (DNP)-NMR enabled dilute (3 atom % N) tertiary alkyl amines and quaternary ammonium ions of the NMDG groups to be detected and distinguished with unprecedented sensitivity and resolution at natural abundance 15 N (0.4%). Two-dimensional (2D) solid-state 11 B{ 1 H}, 13 C{ 1 H}, and 11 B{ 11 B} NMR analyses provide direct atomic-scale evidence for interactions of borate anions with the NMDG moieties on the resin surfaces, which form stable mono- and bischelate complexes. FT-IR spectra reveal displacements in the stretching vibrational frequencies associated with the O-H and N-H bonds of NMDG groups that corroborate the formation of chelate complexes on the resin surfaces. The atomic-level compositions and structures are related to boron adsorption properties of resin materials synthesized under different conditions, which have important remediation applications. |
| تواريخ الأحداث: |
Date Created: 20190904 Latest Revision: 20200304 |
| رمز التحديث: |
20231215 |
| DOI: |
10.1021/acs.langmuir.9b02042 |
| PMID: |
31479272 |
| قاعدة البيانات: |
MEDLINE |
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