Enhanced photocatalytic activity of Eu2O3/Ta2O5 mixed oxides on degradation of rhodamine B and 4-nitrophenol

被引：29

作者：

Yang, Xia ^{[2
]}

Xu, Leilei ^{[2
]}

Yu, Xiaodan ^{[2
]}

Li, Wei ^{[2
]}

Li, Kexin ^{[2
]}

Huo, Mingxin ^{[1
]}

Guo, Yihang ^{[2
]}

机构：

[1] NE Normal Univ, Sch Urban & Environm Sci, Changchun 130024, Peoples R China

[2] NE Normal Univ, Sch Chem, Changchun 130024, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2008年 / 320卷 / 1-3期

关键词：

europium oxide; tantalum pentoxide; sol-gel; photocatalysis; mixed oxides; RB; 4-NP;

D O I：

10.1016/j.colsurfa.2008.01.019

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：

Europium oxide/tantalum pentoxide (Eu2O3/Ta2O5) mixed oxides with different Eu2O3 dopings were prepared by a single-step sol-gel process via hydrolysis of tantalum pentachloride in the presence of europium nitrate. The products were in the amorphous and orthorhombic phase structures, respectively, based on the different calcination temperatures (200 and 500 degrees C). Composition, morphology, phase structure, Eu2O3-doping mode in the Ta2O5 matrix and optical absorption property of the products were characterized by inductively coupled plasma atomic emission spectroscopy (ICP-AES), field emission scanning electron microscopy (FESEM), X-ray diffraction patterns (XRD), X-ray photoelectron spectroscopy (XPS) and UV-vis diffuse reflectance spectroscopy (UV-vis/DRS). The UV-light photocatalytic activity of the products was evaluated by degradation of aqueous rhodamine B (RB) and 4-nitrophenol (4-NP). The results showed that the photocatalytic activity of as-prepared Eu2O3/Ta2O5 was higher than that of pure Ta2O5 regardless of their phase structures. Among the tested samples, Eu2O3/Ta2O5 with 0.49% Eu loading obtained with 200 degrees C exhibited the highest activity to degradation of the above two model molecules. The reasons of this enhanced photocatalytic activity were discussed. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：61 / 67

页数：7

共 26 条

[1] An aqueous sol-gel route to synthesize nanosized lanthanadoped titania having an increased anatase phase stability for photocatalytic application
Baiju, K
Sibu, CP
Rajesh, K
Pillai, PK
Mukundan, P
Warrier, KGK
Wunderlich, W
[J]. MATERIALS CHEMISTRY AND PHYSICS, 2005, 90 (01) : 123 - 127
[2] Visible and near-IR luminescence via energy transfer in rare earth doped mesoporous titania thin films with nanocrystalline walls
Frindell, KL
Bartl, MH
Robinson, MR
Bazan, GC
Popitsch, A
Stucky, GD
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 2003, 172 (01) : 81 - 88
[3] Study of dry and electrogenerated Ta2O5 and Ta/Ta2O5/Pt structures by XPS
Kerrec, O
Devilliers, D
Groult, H
Marcus, P
[J]. MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 1998, 55 (1-2): : 134 - 142
[4] KLUG HP, 1974, XRAY DIFFRACTIONS PR
[5] Solvothermal synthesis of tantalum(V) oxide nanoparticles and their photocatalytic activities in aqueous suspension systems
Kominami, H
Miyakawa, M
Murakami, S
Yasuda, T
Kohno, M
Onoue, S
Kera, Y
Ohtani, B
[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2001, 3 (13) : 2697 - 2703
[6] Synthesis and property of mesoporous tantalum oxides
Kondo, JN
Takahara, Y
Lee, B
Lu, DL
Domen, K
[J]. TOPICS IN CATALYSIS, 2002, 19 (02) : 171 - 177
[7] Mesoporous Ta Oxide. 2. Improvement of the synthetic method and Observation of mesostructure fromation
Kondo, JN
Takahara, Y
Lu, DL
Domen, K
[J]. CHEMISTRY OF MATERIALS, 2001, 13 (04) : 1200 - 1206
[8] Polycrystalline TiO2 impregnated with cardanol-based porphyrins for the photocatalytic degradation of 4-nitrophenol
Mele, G
Del Sole, R
Vasapollo, G
Garcìa-Lòpez, E
Palmisano, L
Mazzetto, SE
Attanasi, OA
Filippone, P
[J]. GREEN CHEMISTRY, 2004, 6 (12) : 604 - 608
[9] Visible light sensitive photocatalysts, nitrogen-doped Ta2O5 powders
Murase, T
Irie, H
Hashimoto, K
[J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (40) : 15803 - 15807
[10] PIELASZEK J, 2002, NANOSTRUCTURED MAT S

← 1 2 3 →