Fe oxide nanoparticles/Ti-modified mesoporous silica as a photo-catalyst for efficient and selective cyclohexane conversion with O2 and solar light

被引：31

作者：

Ide, Y. ^{[1
,2
]}

Iwata, M. ^{[2
]}

Yagenji, Y. ^{[3
]}

Tsunoji, N. ^{[3
]}

Sohmiya, M. ^{[4
]}

Komaguchi, K. ^{[3
]}

Sano, T. ^{[3
]}

Sugahara, Y. ^{[2
,5
,6
]}

机构：

[1] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton MANA, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan

[2] Waseda Univ, Grad Sch Creat Sci & Engn, Shinjuku Ku, 1-6-1 Nishiwaseda, Tokyo 1698050, Japan

[3] Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, 1-4-1 Kagamiyama, Higashihiroshima 7398527, Japan

[4] Waseda Univ, Dept Earth Sci, Shinjuku Ku, 1-6-1 Nishiwaseda, Tokyo 1698050, Japan

[5] Waseda Univ, Sch Adv Sci & Engn, Dept Appl Chem, Shinjuku Ku, 3-4-1 Ohkubo, Tokyo 1698555, Japan

[6] Waseda Univ, Kagami Mem Res Inst Mat Sci & Technol, Shinjuku Ku, 2-8-26 Nishiwaseda, Tokyo 1690054, Japan

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2016年 / 4卷 / 41期

关键词：

VISIBLE-LIGHT; ACTIVATION; DIOXIDE; PHOTOOXIDATION; PERFORMANCE; REDUCTION; OXIDATION; CENTERS; DESIGN;

D O I：

10.1039/c6ta04222h

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：

We report a new, environmentally and economically friendly photocatalytic process with unprecedentedly high activity for partial cyclohexane oxidation. Mesoporous silicas containing isolated tetra-hedrally coordinated Ti and Fe oxide nanoparticles immobilized on the pore surface were synthesized by reacting SBA-15 with Ti(IV) acetylacetonate and Fe(III) acetylacetonate successively. A variety of characterizations suggested that the grafted tetrahedrally coordinated Ti species were coupled with Fe oxide nanoparticles via Ti-O-Fe bonds. The SBA-15 photocatalysts showed a high yield (up to sub-mmol) and nearly 100% selectivity for the production of cyclohexanol and cyclohexanone with molecular O-2 under solar light. The unprecedentedly high activity could be explained by the lengthened lifetime of the active Ti species by electron delocalization over Ti-O-Fe bonds and the visible light (lambda > 420 nm)-induced activity endowed by Fe oxide nanoparticles coupled to the Ti species.

引用

页码：15829 / 15835

页数：7

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