Synthesis, characterization and photo catalytic degradation of aqueous eosin over Cr containing Ti/MCM-41 and SiO2-TiO2 catalysts using visible light

被引：32

作者：

Awate, S ^{[1
]}

Jacob, NE ^{[1
]}

Deshpande, SS ^{[1
]}

Gaydhankar, TR ^{[1
]}

Belhekar, AA ^{[1
]}

机构：

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

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2005年 / 226卷 / 02期

关键词：

Cr-Ti/MCM-41; Cr/SiO2-TiO2; photo degradation; eosin; visible light;

D O I：

10.1016/j.molcata.2004.09.055

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 series of samples were prepared namely Cr-Ti/MCM-41 and Cr/SiO2-TiO2 keeping Si/Ti mole ratio same, with different Cr loading. The physico-chemical properties of the samples were characterized by different analytical techniques such as XRD, FTIR, TEM, low temperature N-2 sorption, and UV-vis diffused reflectance spectroscopy. The impregnated TiO2 was in anatase form. The crystallite size was determined from Scherrer equation as well as by TEM. There is a difference between the shapes of nitrogen adsorption isotherms with and without Cr-loaded Ti/MCM-41 samples. The rate of nitrogen adsorption was found to increase with decrease in Cr content at lower P/P-0 for Cr-Ti/MCM-41 samples due to the blocking of the pores with Cr. All MCM-41 samples exhibited pore sizes from 24 nm to 32 nm. UV-vis diffused reflectance spectra of all Cr-loaded samples showed red shift of their absorption edges. Photo degradation of eosin dye was studied using visible light. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：149 / 154

页数：6

共 19 条

[1] Utilization of TiO2 photocatalysts in green chemistry [J].

Anpo, M .

PURE AND APPLIED CHEMISTRY, 2000, 72 (07) :1265-1270

[2] Photocatalytic activity of titania modified mesoporous silica for pollution control [J].

Belhekar, AA ;

Awate, SV ;

Anand, R .

CATALYSIS COMMUNICATIONS, 2002, 3 (10) :453-458

[3] SYNTHESIS AND CHARACTERIZATION OF A CHROMIUM SILICALITE-1 [J].

CHAPUS, T ;

TUEL, A ;

TAARIT, YB ;

NACCACHE, C .

ZEOLITES, 1994, 14 (05) :349-355

[4] Transition-metal-substituted titania-loaded MCM-41 as photocatalysts for the degradation of aqueous organics in visible light [J].

Davydov, L ;

Reddy, EP ;

France, P ;

Smirniotis, PG .

JOURNAL OF CATALYSIS, 2001, 203 (01) :157-167

[5]

Gadsden J. A., 1975, INFRARED SPECTRA MIN, P44

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

Gao, XT ;

Wachs, IE .

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

[7] PHOTOCHEMISTRY ON SURFACES .4. INFLUENCE OF SUPPORT MATERIAL ON THE PHOTOCHEMISTRY OF AN ADSORBED DYE [J].

GOPIDAS, KR ;

KAMAT, PV .

JOURNAL OF PHYSICAL CHEMISTRY, 1989, 93 (17) :6428-6433

[8]

HERMANN JM, 1999, CATALYTIC SCI SERIES, V1, P171

[9] 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

[10] Photocatalytic degradation of cationic blue X-GRL adsorbed on TiO2/SiO2 photocatalyst [J].

Hu, C ;

Tang, YC ;

Yu, JC ;

Wong, PK .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 40 (02) :131-140

← 1 2 →