TY - JOUR
T1 - A structure of MnO2 embedded in CMK-3 framework developed by a redox method
AU - Dong, Xiaoping
AU - Shen, Weihua
AU - Gu, Jinlou
AU - Xiong, Liangmin
AU - Zhu, Yufang
AU - Li, Hua
AU - Shi, Jianlin
PY - 2006/4/15
Y1 - 2006/4/15
N2 - A new in situ reduction method has been developed to synthesize a novel structured MnO2/mesoporous carbon composites with MnO2 nanoparticles embedded in the wall of ordered mesoporous carbon CMK-3 materials. KMnO4 was easy to be reduced into MnO2 in a short time in the presence of carbon, meanwhile the carbon atoms on the surface were oxidized into C-OH, CO and COOH species, making the surface more hydrophilic, and permanganate ions more readily to access, which leads to the embedded structure. The MnO2/CMK-3 composite materials were characterized using thermogravimetric analysis (TG), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), nitrogen sorption, transmission electron microscopy (TEM), and energy-dispersive X-ray (EDX) spectroscopy. The results show that different MnO2 contents could be introduced into the pores of CMK-3 treated with an aqueous solution of potassium permanganate, while retaining the ordered mesostructure and larger surface area. Increasing the MnO2 content did not result in a decrease in pore size from the data of nitrogen sorption isotherms, indicating that MnO2 nanoparticles are embedded in the pore wall, as evidenced by TEM observation.
AB - A new in situ reduction method has been developed to synthesize a novel structured MnO2/mesoporous carbon composites with MnO2 nanoparticles embedded in the wall of ordered mesoporous carbon CMK-3 materials. KMnO4 was easy to be reduced into MnO2 in a short time in the presence of carbon, meanwhile the carbon atoms on the surface were oxidized into C-OH, CO and COOH species, making the surface more hydrophilic, and permanganate ions more readily to access, which leads to the embedded structure. The MnO2/CMK-3 composite materials were characterized using thermogravimetric analysis (TG), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), nitrogen sorption, transmission electron microscopy (TEM), and energy-dispersive X-ray (EDX) spectroscopy. The results show that different MnO2 contents could be introduced into the pores of CMK-3 treated with an aqueous solution of potassium permanganate, while retaining the ordered mesostructure and larger surface area. Increasing the MnO2 content did not result in a decrease in pore size from the data of nitrogen sorption isotherms, indicating that MnO2 nanoparticles are embedded in the pore wall, as evidenced by TEM observation.
KW - CMK-3
KW - Embed
KW - MnO-mesoporous carbon
UR - https://www.scopus.com/pages/publications/33645090966
U2 - 10.1016/j.micromeso.2005.11.019
DO - 10.1016/j.micromeso.2005.11.019
M3 - 文章
AN - SCOPUS:33645090966
SN - 1387-1811
VL - 91
SP - 120
EP - 127
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
IS - 1-3
ER -