Photocatalytic activity of titania modified mesoporous silica for pollution control

被引：129

作者：

Belhekar, AA ^{[1
]}

Awate, SV ^{[1
]}

Anand, R ^{[1
]}

机构：

[1] Natl Chem Lab, Catalysis Div, Pune 411008, Maharashtra, India

来源：

CATALYSIS COMMUNICATIONS | 2002年 / 3卷 / 10期

关键词：

TiO2; photodegradation; mesoporous silica; methylene blue;

D O I：

10.1016/S1566-7367(02)00179-6

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：

A series of titania modified mesoporous silicates with variable Si/Ti ratios were prepared using titanium tetrabutoxide by impregnation method. The samples were characterized by different analytical techniques such as XRD, TEM, FT-IR, low temperature N-2 sorption, and UV-Vis diffused reflectance spectroscopy. The TiO2, supported on mesoporous silica was found to be in the anatase form. Crystallite size calculated using Scherrer's formula was found to be in the range 18-20 nm. However, the TiO2 particle diameter estimated by TEM was 5 urn. UV-Vis spectra showed a blueshift of the absorption edge for all the samples. The BET surface area decreased with TiO2, loading. Photodegradation of basic dye-like methylene blue (MB) was studied on these titania modified mesoporous silica using UV irradiation. Volatile organic pollutants like phenol and toluene can also be photocatalytically degraded using these titania modified mesoporous silicates. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：453 / 458

页数：6

共 12 条

[1] A spectroscopic study of amorphous and crystalline Ti-containing silicas and their surface acidity [J].

Armaroli, T ;

Milella, F ;

Notari, B ;

Willey, RJ ;

Busca, G .

TOPICS IN CATALYSIS, 2001, 15 (01) :63-71

[2] Synthesis and characterization of titanium-containing mesoporous silica by a non-hydrothermal microwave method [J].

Belhekar, A ;

Agashe, M ;

Soni, H ;

Sathaye, S ;

Jacob, N ;

Thundimadathil, J .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 2000, 73 (11) :2605-2608

[3] Enhanced photocatalytic activity of titanium dioxide supported on hexagonal mesoporous silica at lower coverage [J].

Dai, Q ;

He, NY ;

Weng, KP ;

Lin, BP ;

Lu, ZH ;

Yuan, CW .

JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY, 1999, 35 (1-2) :11-21

[4] Titania-silica as catalysts: molecular structural characteristics and physico-chemical properties [J].

Gao, XT ;

Wachs, IE .

CATALYSIS TODAY, 1999, 51 (02) :233-254

[5] SMALL-PARTICLE RESEARCH - PHYSICOCHEMICAL PROPERTIES OF EXTREMELY SMALL COLLOIDAL METAL AND SEMICONDUCTOR PARTICLES [J].

HENGLEIN, A .

CHEMICAL REVIEWS, 1989, 89 (08) :1861-1873

[6] Photodegradation of aromatic pollutants in water over TiO2 supported on molecular sieves [J].

Hsien, YH ;

Chang, CF ;

Chen, YH ;

Cheng, SF .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2001, 31 (04) :241-249

[7] ORDERED MESOPOROUS MOLECULAR-SIEVES SYNTHESIZED BY A LIQUID-CRYSTAL TEMPLATE MECHANISM [J].

KRESGE, CT ;

LEONOWICZ, ME ;

ROTH, WJ ;

VARTULI, JC ;

BECK, JS .

NATURE, 1992, 359 (6397) :710-712

[8]

REDDY S, 1997, ZEOLITES CLAYS NANOS, P405

[9] TITANIUM-CONTAINING MESOPOROUS MOLECULAR-SIEVES FOR CATALYTIC-OXIDATION OF AROMATIC-COMPOUNDS [J].

TANEV, PT ;

CHIBWE, M ;

PINNAVAIA, TJ .

NATURE, 1994, 368 (6469) :321-323

[10] A NEUTRAL TEMPLATING ROUTE TO MESOPOROUS MOLECULAR-SIEVES [J].

TANEV, PT ;

PINNAVAIA, TJ .

SCIENCE, 1995, 267 (5199) :865-867

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