A multi-technique approach for studying Na triclinic and hexagonal birnessites

被引：36

作者：

Boumaiza, Hella ^{[1
,2
,3
]}

Renard, Aurelien ^{[1
]}

Robinson, Mbolantenaina Rakotomalala ^{[1
]}

Kervern, Gwendal ^{[4
]}

Vidal, Loic ^{[5
]}

Ruby, Christian ^{[1
]}

Bergaoui, Latifa ^{[2
,3
]}

Coustel, Romain ^{[1
]}

机构：

[1] Univ Lorraine, Lab Chim Phys & Microbiol Mat & Environm, LCPME UMR 7564, CNRS, 405 Rue Vandoeuvre, F-54600 Villers Les Nancy, France

[2] Univ Tunis El Manor, Lab Chim Mat & Catalyse, Fac Sci Tunis, Tunis, Tunisia

[3] Univ Carthage, INSAT, Dept Genie Biol & Chim, Tunis, Tunisia

[4] Univ Lorraine, Lab Cristallog Resonance Magnet & Modelisat, CRM2 UMR 7036, CNRS, BP 70239 Blvd Aiguillettes, F-54506 Vandoeuvre Les Nancy, France

[5] CNRS, IS2M, UMR 7361 UHA, 15 Rue Jean Starcky,BP 2488, F-68057 Mulhouse, France

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2019年 / 272卷

关键词：

Birnessite; XRD; FTIR; Raman; NMR; XPS; MANGANESE OXIDES; OXIDATION-STATES; RICH BIRNESSITE; REDOX REACTIONS; ION-EXCHANGE; HEAVY-METALS; MN; SORPTION; SPECTRA; WATER;

D O I：

10.1016/j.jssc.2019.02.017

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Bimessite is a ubiquitous natural Mn oxide. This layered material is involved in a large variety of ion-exchange and redox reaction in soils and sediments. Synthetic Na-triclinic birnessite with a general formula [Mn-0.35(III) Mn-0.65(IV) O-2] [Na-0.35(+) 0.7H(2)O] was converted into hexagonal birnessite by acidic treatment at pH = 3.5. Both solids were fully characterized by TEM, SEM, PXRD, FTIR, Raman scattering, Na-23 as well as the first H-1 MAS NMR birnessite spectra were reported. The surfaces of both forms were fully analyzed by XPS: a particular attention was paid to the determination of the oxidation state of Mn derived from the fitting of XPS Mn 3p or Mn 2p(3/2) features. An excess of reduced Mn at the surface in comparison to the bulk materials was evidenced.

引用

页码：234 / 243

页数：10

共 59 条

[1] Investigation of cation ordering in triclinic sodium birnessite via 23Na MAS NMR spectroscopy [J].