Room Temperature Synthesis of Ti-MCM-48 and Ti-MCM-41 Mesoporous Materials and Their Performance on Photocatalytic Splitting of Water

被引：95
|
作者：
Peng, Rui [1 ]
Zhao, Dan [2 ]
Dimitrijevic, Nada M. [3 ,4 ]
Rajh, Tijana [3 ,4 ]
Koodali, Ranjit T. [1 ]
机构：
[1] Univ S Dakota, Dept Chem, Vermillion, SD 57069 USA
[2] Ningbo Inst Technol, Dept Chem Engn, Ningbo 315211, Zhejiang, Peoples R China
[3] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA
[4] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 01期
基金：
美国国家科学基金会;
关键词：
TITANOSILICATE MOLECULAR-SIEVES; HYDROGEN-PRODUCTION; LOCAL STRUCTURES; VISIBLE-LIGHT; SINGLE-SITE; CATALYTIC-ACTIVITY; CONTAINING MCM-41; DECOMPOSITION; TI; REACTIVITY;
D O I：
10.1021/jp210448v
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：
Two sets of titania containing MCM-48 and MCM-41 photocatalysts were prepared at room temperature. Powder X-ray diffraction (XRD), transmission electron microscopy (TEM), nitrogen adsorption isotherms, UV-visible diffuse reflectance spectroscopy (DRS), and electron paramagnetic resonance (EPR) spectroscopy were utilized to characterize the Ti-MCM-48 and Ti-MCM-41 mesoporous materials. The photocatalytic hydrogen evolution results carried out under UV light irradiation indicated that the photocatalytic activity decreased with an increase of Ti-loading in Ti-MCM-48 and Ti-MCM-41 samples. The photocatalytic activity was found to be dependent on the coordination of Ti-and most importantly on the pore geometry, that is, cubic MCM-48 with interpenetrating network of pores exhibiting higher activity than uni-dimensional hexagonal pores in MCM-41.
引用
收藏
页码：1605 / 1613
页数：9
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