Molecular Recognitive Photocatalysis Driven by the Selective Adsorption on Layered Titanates

被引:102
作者
Ide, Yusuke [1 ]
Nakasato, Yuri [1 ]
Ogawa, Makoto [1 ]
机构
[1] Waseda Univ, Dept Earth Sci, Shinjyuku Ku, Tokyo 1698050, Japan
基金
日本学术振兴会;
关键词
2-STEP PROCESS; INTERCALATION; MUSCOVITE; HYDROGEN; CATIONS; WATER; SIZE;
D O I
10.1021/ja910591v
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The composition of layered alkali titanates (MxTi2-x/3Lix/3O4; M = K+, Li+, Na+) was tuned to control the swelling of the titanates in water and subsequently achieve molecular-sieve-like molecular recognitive photocatalytic decomposition of aqueous organic compounds on the titanates. Layered potassium lithium titanates with different layer charge density, KxTi2-x/3Lix/3O4 (x = 0.61, 0.67, and 0.74), was first synthesized and then the interlayer K+ was quantitatively exchanged with Li+- and Na+ to form LixTi2-x/3-Lix/3O4 (x = 0.61, 0.67, and 0.76) and NaxTi2-x/3Lix/3O4 (x = 0.61, 0.67, and 0.76). The water adsorption/desorption isotherms and X-ray diffraction patterns of the titanates revealed that the pristine K+-type titanates hardly hydrated, while the Li+- and Na+-exchanged titanates expanded the interlayer space upon the hydration and the degree in the hydration was larger for the Na forms than for the Li ones and depended on the layer charge density. The present titanates were found to selectively adsorb benzene from an aqueous mixture of benzene, phenol, and 4-butylphenol and subsequently decompose benzene upon UV irradiation. The efficiency of the molecular recognitive photocatalytic benzene decomposition was related to the degree in the swelling of the titanates in water.
引用
收藏
页码:3601 / 3604
页数:4
相关论文
共 29 条
[1]  
[Anonymous], 1977, Introduction to Clay Colloid Chemistry
[2]   A theory of water and ionic solution, with particular reference to hydrogen and hydroxyl ions [J].
Bernal, JD ;
Fowler, RH .
JOURNAL OF CHEMICAL PHYSICS, 1933, 1 (08) :515-548
[3]   Shape-selective photocatalytic transformation of phenols in an aqueous medium [J].
Calza, P ;
Pazé, C ;
Pelizzetti, E ;
Zecchina, A .
CHEMICAL COMMUNICATIONS, 2001, (20) :2130-2131
[4]   HETEROGENEOUS PHOTOCATALYSIS [J].
FOX, MA ;
DULAY, MT .
CHEMICAL REVIEWS, 1993, 93 (01) :341-357
[5]  
Fujishima A., 2000, J PHOTOCH PHOTOBIO C, V1, P1, DOI DOI 10.1016/S1389-5567(00)00002-2
[6]   Composition-dependent ion-exchange reactivity of potassium lithium titanates [J].
Fuse, Yasufumi ;
Ide, Yusuke ;
Ogawa, Makoto .
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 2008, 81 (06) :767-772
[7]   Selective photocatalysis by means of molecular recognition [J].
Ghosh-Mukerji, S ;
Haick, H ;
Schvartzman, M ;
Paz, Y .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (43) :10776-10777
[8]   Interlayer modification of a layered titanate with two kinds of organic functional units for molecule-specific adsorption [J].
Ide, Yusuke ;
Ogawa, Makoto .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2007, 46 (44) :8449-8451
[9]   Swelling in Water of a Layered Alkali Silicate, Octosilicate, Modified with a Sulfonic Acid Group [J].
Ide, Yusuke ;
Ozaki, Go ;
Ogawa, Makoto .
LANGMUIR, 2009, 25 (09) :5276-5281
[10]   Direct nanocomposite of crystalline TiO2 particles and mesoporous silica as a molecular selective and highly active photocatalyst [J].
Inumaru, K ;
Kasahara, T ;
Yasui, M ;
Yamanaka, S .
CHEMICAL COMMUNICATIONS, 2005, (16) :2131-2133