Sulfated TiO2 decontaminate 2-CEES and DMMP in vapor phase

被引：19

作者：

Han, ShiTong ^{[1
,2
]}

Zhang, GuoYing ^{[2
]}

Xi, HaiLing ^{[1
]}

Xu, DaNian ^{[1
]}

Fu, XianZhi ^{[2
]}

Wang, XuXu ^{[2
]}

机构：

[1] Res Inst Chem Def, Beijing 102205, Peoples R China

[2] Fuzhou Univ, Res Inst Photocatalysis, Fuzhou 350002, Peoples R China

来源：

CATALYSIS LETTERS | 2008年 / 122卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

photocatalysis; decontamination; sulfated TiO2; DMMP; 2-CEES;

D O I：

10.1007/s10562-007-9350-z

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：

An acid photocatalyst TiO2, modified with H2SO4, is prepared and used to decontaminate Chemical Warfare Agents (CWAs) simulants 2-CEES (2-chloroethyl ethyl sulfide) and DMMP (dimethyl methylphosphonate) in vapor phase. Compared with the unmodified pure TiO2 photocatalyst, the adsorption capacity on the sulfated photocatalyst increases by 50%, and the conversion for 2-CEES increases more than 20%. It is found that the durability for decontaminating DMMP is delayed by 200 min with the modified photocatalyst. The surface characteristics of the photocatalysts are analyzed by XPS and FT-IR. The results show that more Lewis and Bronsted acid sites, considered to be responsible for improving the reactivity performance of photocatalysts, are formed on the sulfated TiO2.

引用

页码：106 / 110

页数：5

共 27 条

[1] Gas phase photocatalytic removal of toluene effluents on sulfated titania [J].

Barraud, E ;

Bosc, F ;

Edwards, D ;

Keller, N ;

Keller, V .

JOURNAL OF CATALYSIS, 2005, 235 (02) :318-326

[2] Structural and surface approach to the enhanced photocatalytic activity of sulfated TiO2 photocatalyst [J].

Colón, G ;

Hidalgo, MC ;

Munuera, G ;

Ferino, I ;

Cutrufello, MG ;

Navío, JA .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2006, 63 (1-2) :45-59

[3] PHOTOCATALYTIC DECONTAMINATION OF SULFUR-CONTAINING ALKYL-HALIDES ON IRRADIATED SEMICONDUCTOR SUSPENSIONS [J].

FOX, MA ;

KIM, YS ;

ABDELWAHAB, AA ;

DULAY, M .

CATALYSIS LETTERS, 1990, 5 (4-6) :369-376

[4]

FU XZ, 1997, J CATAL, V168, P2

[5]

Han Shi-tong, 2005, Huanjing Kexue, V26, P130

[6] ENVIRONMENTAL APPLICATIONS OF SEMICONDUCTOR PHOTOCATALYSIS [J].

HOFFMANN, MR ;

MARTIN, ST ;

CHOI, WY ;

BAHNEMANN, DW .

CHEMICAL REVIEWS, 1995, 95 (01) :69-96

[7] Photocatalytic degradation of volatile organic compounds at the gas-solid interface of a TiO2 photocatalyst [J].

Kim, SB ;

Hwang, HT ;

Hong, SC .

CHEMOSPHERE, 2002, 48 (04) :437-444

[8] Adsorption and photocatalytic degradation of diisopropyl fluorophosphate and dimethyl methylphosphonate over dry and wet rutile TiO2 [J].

Kiselev, A. ;

Mattson, A. ;

Andersson, M. ;

Palmqvist, A. E. C. ;

Osterlund, L. .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2006, 184 (1-2) :125-134

[9] Relationship between the formation of surface species and catalyst deactivation during the gas-phase photocatalytic oxidation of toluene [J].

Mendez-Roman, R ;

Cardona-Martinez, N .

CATALYSIS TODAY, 1998, 40 (04) :353-365

[10] Adsorption and photodegradation of dimethyl methylphosphonate vapor at TiO2 surfaces [J].

Moss, JA ;

Szczepankiewicz, SH ;

Park, E ;

Hoffmann, MR .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (42) :19779-19785

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