Photocatalytic degradation of organic compounds in aqueous systems by Fe and Ho codoped TiO2

被引：18

作者：

Shi, J. ^{[1
]}

Zheng, J. ^{[1
]}

Hu, Y. ^{[1
]}

Zhao, Yu. ^{[1
]}

机构：

[1] China Univ Petr, State Key Lab Heavy Oil, Dongying 257061, Shandong, Peoples R China

来源：

KINETICS AND CATALYSIS | 2008年 / 49卷 / 02期

关键词：

D O I：

10.1134/S002315840802016X

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：

Undoped, single-doped, and codoped TiO2 nanoparticles were prepared by the sol-gel method and characterized with X-ray diffraction (XRD), the Brunauer-Emmett-Teller (BET)-specific surface area (S-BET), UV-Vis absorption spectra (UV-Vis), and X-ray photoelectron spectroscopy (XPS). Their photocatalytic activity was evaluated by methyl orange (MO) degradation in an aqueous suspension under UV or simulated solar light illumination. XRD showed that all samples calcined at 600 degrees C preserved the anatase structure, and doping inhibited the increase of crystallite size. The BET result revealed that doping improved the surface area of TiO2. UV-Vis indicated that Fe3+-doping broadened the absorption profile of TiO2. XPS demonstrated that doping was advantageous to absorb more surface hydroxyl groups or chemisorbed water molecules. Photocatalytic degradation showed that the photocatalytic activity of TiO2 codoped with Fe3+ and Ho3+ ions was markedly improved. This was ascribed to the fact that there was a cooperative action in the two doped elements. Fe3+-doping broadens the absorption profile, improves photo utilization of TiO2, and then generates more electronhole pairs. Ho3+-doping restrains the increase in grain size and retards the recombination of photo-generated electrons and holes.

引用

页码：279 / 284

页数：6

共 30 条

[21] Visible-light responsive cerium ion modified titania sol and nanocrystallites for X-3B dye photodegradation [J].

Xie, YB ;

Yuan, CW .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 46 (02) :251-259

[22] The preparation, characterization, and their photocatalytic activities of rare-earth-doped TiO2 nanoparticles [J].

Xu, AW ;

Gao, Y ;

Liu, HQ .

JOURNAL OF CATALYSIS, 2002, 207 (02) :151-157

[23] Zinc ions surface-doped titanium dioxide nanotubes and its photocatalysis activity for degradation of methyl orange in water [J].

Xu, JC ;

Lu, M ;

Guo, XY ;

Li, HL .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2005, 226 (01) :123-127

[24] Luminescence characteristics of ZnS nanoparticles co-doped with Ni2+ and Mn2+ [J].

Yang, P ;

Lü, MK ;

Xu, D ;

Yuan, DR ;

Song, CF ;

Liu, SW ;

Cheng, XF .

OPTICAL MATERIALS, 2003, 24 (03) :497-502

[25] Effect of doping mode on the photocatalytic activities of Mo/TiO2 [J].

Yang, Y ;

Li, XJ ;

Chen, JT ;

Wang, LY .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2004, 163 (03) :517-522

[26] Development of TiO2 photocatalyst reaction for water purification [J].

Zhang, LF ;

Kanki, T ;

Sano, N ;

Toyoda, A .

SEPARATION AND PURIFICATION TECHNOLOGY, 2003, 31 (01) :105-110

[27] Copper doping in titanium oxide catalyst film prepared by dc reactive magnetron sputtering [J].

Zhang, WJ ;

Li, Y ;

Zhu, SL ;

Wang, FH .

CATALYSIS TODAY, 2004, 93-5 :589-594

[28] Surface modification of TiO2 film by iron doping using reactive magnetron sputtering [J].

Zhang, WJ ;

Li, Y ;

Zhu, SL ;

Wang, FH .

CHEMICAL PHYSICS LETTERS, 2003, 373 (3-4) :333-337

[29] Role of particle size in nanocrystalline TiO2-based photocatalysts [J].

Zhang, ZB ;

Wang, CC ;

Zakaria, R ;

Ying, JY .

JOURNAL OF PHYSICAL CHEMISTRY B, 1998, 102 (52) :10871-10878

[30] Photocatalytic decomposition of textile dyes on TiO2-Tytanpol A11 and TiO2-Degussa P25 [J].

Zielinska, B ;

Grzechulska, J ;

Morawski, AW .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2003, 157 (01) :65-70

← 1 2 3 →