Synthesis and characterization of pillared buserite

Journal Article · Wed Apr 01 04:00:00 EST 1992 · Inorganic Chemistry; (United States)

DOI:https://doi.org/10.1021/ic00033a010· OSTI ID:7227185

Wong, Shetin; Cheng, Soofin ^[1]

---

1. National Taiwan Univ., Taipei (Taiwan)

Synthetic Na-buserite, a layered manganese oxide formulated as Na{sub 4}Mn{sub 14}O{sub 26}{center dot}{chi}H{sub 2}O, was pillared with polyoxo cations of aluminum known widely as Keggin ions, (Al{sub 13}O{sub 4}(OH){sub 24}(H{sub 2}O){sub 12}){sup 7+}, with a diameter of 8.6 {angstrom}. The synthetic Na-buserite was first expanded with n-hexylammonium cations to produce hexylammonium ion-expanded buserite. This process expands the buserite interlayer free spacing from 1.94 to 12.94 {angstrom}, thus allowing subsequent ion-exchange reaction with Keggin ions to proceed. The presence of pillars between the interlayers of the buserite structure was confirmed by X-ray diffraction, thermogravimetric analysis, and surface area measurements. N{sub 2} adsorption-desorption studies showed that the Keggin ion-pillared buserites are microporous in nature. Particular interest was focused on the studies of the thermal stability of the various materials in different gaseous environment. By complementary studies between X-ray diffraction and thermogravimetric analysis, the intermediates and the final products of these reactions can be identified.

• OSTI ID: 7227185
• Journal Information: Inorganic Chemistry; (United States), Journal Name: Inorganic Chemistry; (United States) Vol. 31:7; ISSN 0020-1669; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400 -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTRA
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL PREPARATION
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
GRAVIMETRIC ANALYSIS
HYDRATES
INFRARED SPECTRA
ION EXCHANGE
MANGANESE COMPOUNDS
MANGANESE OXIDES
OXIDES
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION INTERMEDIATES
SALTS
SCATTERING
SPECTRA
SURFACE AREA
SURFACE PROPERTIES
SYNTHESIS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION