Enhanced and Selective Degradation of Pollutants over Cyclodextrin/TiO2 under Visible Light Irradiation

被引：30

作者：

Zhang, Xu ^{[1
]}

Li, Xuankun ^{[1
]}

Deng, Nansheng ^{[1
]}

机构：

[1] Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2012年 / 51卷 / 02期

关键词：

PHOTOCATALYTIC DEGRADATION; BETA-CYCLODEXTRIN; PHENOLIC-COMPOUNDS; DYE POLLUTANTS; TIO2; SURFACE; INCLUSION; COMPLEXES; PHOTODEGRADATION; NANOPARTICLES;

D O I：

10.1021/ie201694v

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The photocatalytic performance of cyclodextrin modified TiO2 (TiO2/beta-CD) on the degradation of rhodamine B and bisphenol A (BPA) was studied in this work. The interactions between beta-CD and TiO2 varied as the synthesis method changes. When applying TiO2/beta-CD synthesized from photoinduced self-assembly method as photocatalyst, the initial visible light (lambda >= 420 nm) degradation rates R-0 of rhodamine B and BPA increased by 4.6 and 3.2 times respectively. The TiO2/beta-CD hybrid material synthesized from adsorption method only showed enhancement in dye pollutants degradation. The reactivity of TiO2/beta-CD under visible light was correlated with the specific surface area of unmodified semiconductor. The mechanism for the enhanced and selective degradation of pollutants over TiO2/beta-CD was also proposed in this work.

引用

页码：704 / 709

页数：6

共 38 条

[21]

2-9

[22] Enhancement of TiO2 photocatalytic redox ability by β-cyclodextrin in suspended solutions [J].

Lu, P ;

Wu, F ;

Deng, NS .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2004, 53 (02) :87-93

[23] Grafted metallocalixarenes as single-site surface organometallic catalysts [J].

Notestein, JM ;

Iglesia, E ;

Katz, A .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (50) :16478-16486

[24] Photoluminescence and charge-transfer complexes of calixarenes grafted on TiO2 nanoparticles [J].

Notestein, Justin M. ;

Iglesia, Enrique ;

Katz, Alexander .

CHEMISTRY OF MATERIALS, 2007, 19 (20) :4998-5005

[25] Hybrid photoactive assemblies: Electron injection from host-guest complexes into semiconductor nanoparticles [J].

Pagba, C ;

Zordan, G ;

Galoppini, E ;

Piatnitski, EL ;

Hore, S ;

Deshayes, K ;

Piotrowiak, P .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (32) :9888-9889

[26] Visible-light-mediated TiO2 photocatalysis of fluoroquinolone antibacterial agents [J].

Paul, Tias ;

Miller, Penney L. ;

Strathmann, Timothy J. .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2007, 41 (13) :4720-4727

[27] Surface restructuring of nanoparticles: An efficient route for ligand-metal oxide crosstalk [J].

Rajh, T ;

Chen, LX ;

Lukas, K ;

Liu, T ;

Thurnauer, MC ;

Tiede, DM .

JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (41) :10543-10552

[28]

Rajh T, 1996, J NON-CRYST SOLIDS, V207, P815, DOI 10.1016/S0022-3093(96)00311-0

[29] One-electron oxidation pathways during β-cyclodextrin-modified TiO2 photocatalytic reactions [J].

Tachikawa, Takashi ;

Tojo, Sachiko ;

Fujitsuka, Mamoru ;

Majima, Tetsuro .

CHEMISTRY-A EUROPEAN JOURNAL, 2006, 12 (29) :7585-7594

[30] Selective host-guest interactions on mesoporous TiO2 films modified with carboxymethyl-β-cyclodextrin [J].

Toma, Sergio H. ;

Bonacin, Juliano A. ;

Araki, Koiti ;

Toma, Henrique E. .

SURFACE SCIENCE, 2006, 600 (19) :4591-4597

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