Fabrication of γ-MnO2/α-MnO2 hollow core/shell structures and their application to water treatment

被引：101

作者：

Cao, Jie ^{[1
,2
,3
]}

Mao, Qinghe ^{[1
]}

Shi, Liang ^{[2
,3
]}

Qian, Yitai ^{[2
,3
]}

机构：

[1] Chinese Acad Sci, Anhui Prov Key Lab Photon Devices & Mat, Anhui Inst Opt & Fine Mech, Hefei 230031, Peoples R China

[2] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[3] Univ Sci & Technol China, Dept Chem, Hefei 230026, Anhui, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 40期

关键词：

MANGANESE OXIDE NANOSTRUCTURES; HYDROTHERMAL SYNTHESIS; PSEUDOCAPACITANCE PROPERTIES; SEMICONDUCTOR NANOCRYSTALS; MNO2; NANOSTRUCTURES; FACILE SYNTHESIS; NANOPARTICLES; MICROSPHERES; ALPHA-MNO2; NANOWIRES;

D O I：

10.1039/c1jm10862j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, we present a novel concept of structural design for the synthesis of a new type of core/shell structure comprising gamma-MnO2 cores inside hollow alpha-MnO2 shells. The approach involves two main steps. First, MnCO3 microellipsoids were mixed directly with KMnO4 solution, which lead to a manganese oxide shell on the surface of the MnCO3. Then, thermal annealing of this type of core/shell structure resulted in the formation of gamma-MnO2/alpha-MnO2 ellipsoids, accompanying with the phase transition in both the core and shell. The as-prepared gamma-MnO2/alpha-MnO2 ellipsoids were used as adsorbent in water treatment, and showed an excellent ability to remove organic pollutants and heavy metal ions without any other additives.

引用

页码：16210 / 16215

页数：6

共 53 条

[1] Energy-transfer pumping of semiconductor nanocrystals using an epitaxial quantum well [J].