Photocatalytic activity of titanium dioxide modified concrete materials - Influence of utilizing recycled glass cullets as aggregates

被引：123

作者：

Chen, Jun ^{[1
]}

Poon, Chi-Sun ^{[1
]}

机构：

[1] Hong Kong Polytech Univ, Dept Civil & Struct Engn, Res Ctr Environm Technol & Management, Hong Kong, Hong Kong, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL MANAGEMENT | 2009年 / 90卷 / 11期

关键词：

Photocatalysis; Titanium dioxide; Recycled glass cullets; Photocatalytic building materials; Air pollution mitigation; WASTE GLASS; TIO2; DEGRADATION; TOLUENE; AIR;

D O I：

10.1016/j.jenvman.2009.05.029

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Combining the use of photocatalysts with cementitious materials is an important development in the field of photocatalytic air pollution mitigation. This paper presents the results of a systematic study on assessing the effectiveness of pollutant degradation by concrete surface layers that incorporate a photocatalytic material - Titanium Dioxide. The photocatalytic activity of the concrete samples was determined by photocatalytic oxidation of nitric oxide (NO) in the laboratory. Recycled glass cullets, derived from crushed waste beverage bottles, were used to replace sand in preparing the concrete surface layers. Factors, which may affect the pollutant removal performance of the concrete layers including glass color, aggregate size and curing age, were investigated. The results show a significant enhancement of the photocatalytic activity due to the use of glass cullets as aggregates in the concrete layers. The samples fabricated with clear glass cullets exhibited threefold No removal efficiency compared to the samples fabricated with river sand. The light transmittance property of glass was postulated to account for the efficiency improvement, which was confirmed by a separate simulation study But the influence of the size of glass cullets was not evident. In addition, the photocatalytic activity of concrete surface layers decreased with curing age, showing a loss of 20% photocatalytic activity after 56-day curing. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：3436 / 3442

页数：7

共 25 条

[1] State of the art and perspectives on materials and applications of photocatalysis over TiO2 [J].

Agrios, AG ;

Pichat, P .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 2005, 35 (7-8) :655-663

[2]

Bazant ZP, 2000, J ENG MECH-ASCE, V126, P226

[3]

Beeldens A., 2007, RILEM INT S PHOT ENV, P187

[4] A NEW GAS PERMEAMETER FOR MEASURING THE PERMEABILITY OF MORTAR AND CONCRETE [J].

CABRERA, JG ;

LYNSDALE, CJ .

MAGAZINE OF CONCRETE RESEARCH, 1988, 40 (144) :177-182

[5] External and internal mass transfer effect on photocatalytic degradation [J].

Chen, DW ;

Li, FM ;

Ray, AK .

CATALYSIS TODAY, 2001, 66 (2-4) :475-485

[6] Heterogeneous photocatalytic removal of toluene from air on building materials enriched with TiO2 [J].

Demeestere, Kristof ;

Dewulf, Jo ;

De Witte, Bavo ;

Beeldens, Anne ;

Van Langenhove, Herman .

BUILDING AND ENVIRONMENT, 2008, 43 (04) :406-414

[7] Lightweight aggregate based on waste glass and its alkali-silica reactivity [J].

Ducman, V ;

Mladenovic, A ;

Suput, JS .

CEMENT AND CONCRETE RESEARCH, 2002, 32 (02) :223-226

[8] Influence of the age and drying process on pore structure and sorption isotherms of hardened cement paste [J].

Espinosa, Rosa Maria ;

Franke, Lutz .

CEMENT AND CONCRETE RESEARCH, 2006, 36 (10) :1969-1984

[9]

Gonen T., 2006, Construction and Building Materials, V21, P1040

[10]

Japanese Industrial Standard (JIS), 2004, R17011 JIS, P1

← 1 2 3 →