Crystal and fine structural transformation of Heat-treated biogenic manganese oxide

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67179843%3A_____%2F13%3A00394710" target="_blank" >RIV/67179843:_____/13:00394710 - isvavai.cz</a>

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

Crystal and fine structural transformation of Heat-treated biogenic manganese oxide

Original language description

In the natural aquatic environment, there are various types of biogenic manganese oxide (BMO) precipitates which are produced by manganese oxidizing microorganisms, at ambient temperature, atmosphere and neutral pH. BMO is a very interesting and useful functional material because of its unique property; hollow globule shape formed by nanosheets, large surface area and photocatalytic characteristics. In this study, thermally-processed BMO at 100-1000°C was analyzed by XRD, XANES, SEM, TEM and nitrogen adsorption method to reveal the effects of heat-treatment on its crystal structure, Mn valence state, globule morphology, microstructure, pore size distribution and specific surface area. In the result, morphology of BMO is maintained below 800 °C, while nanosheets composing BMO were changed into nanoparticles at 600 °C. The crystal structure was transformed from birnessite into hausmannite (Mn304) at 600 °C. The specific surface area was increased by heat-treatment between 300 and 500 °C.

Czech name

—

Czech description

—

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

EH - Ecology - communities

OECD FORD branch

—

Project

<a href="/en/project/LH11111" target="_blank" >LH11111: Study and application of biogenic iron oxides produced by Leptothrix ochracea</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2013

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of the Japan Society of Powder and Powder Metallurgy

ISSN

0532-8799

e-ISSN

—

Volume of the periodical

60

Issue of the periodical within the volume

3

Country of publishing house

JP - JAPAN

Number of pages

8

Pages from-to

92-98

UT code for WoS article

—

EID of the result in the Scopus database

—