室内典型半挥发性有机物的光催化降解

朱玉杰; 刘璧源; 盖浩南; 段星宇; 曹建平; 黄海保

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (5) : 2390-2398.

大气污染与控制

室内典型半挥发性有机物的光催化降解

朱玉杰¹, 刘璧源¹, 盖浩南¹, 段星宇¹, 曹建平¹, 黄海保^1,2

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Photocatalytic degradation of typical semi-volatile organic compounds in indoor environments

ZHU Yu-jie¹, LIU Bi-yuan¹, GE Hao-nan¹, DUAN Xing-yu¹, CAO Jian-ping¹, HUANG Hai-bao^1,2

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摘要

半挥发性有机物(SVOC)极易吸附在室内各种表面上,导致通风净化等常规方法对室内SVOC污染的控制效果很差.光催化氧化法在室内空气净化领域具有广阔前景,但其对室内SVOC的控制效果尚不清楚.发现常用光催化剂(P25二氧化钛)在254nm紫外灯及室内日光灯的照射下均可实现对两种典型SVOC(邻苯二甲酸二丁酯(DnBP)和磷酸三(2-氯丙基)酯(TCPP))的有效降解,且降解过程符合一阶动力学方程.在日光灯照射下DnBP和TCPP分别可以在120和42h后被完全降解,显著快于通风净化等途径对二者的去除速率.此外,借助气相色谱-质谱联用仪和质子转移反应飞行时间质谱仪联合分析了DnBP和TCPP的光催化降解产物,并初步探究了二者的光催化降解路径.

Abstract

Semi-volatile organic compounds (SVOCs) can be easily adsorbed by indoor surfaces and thus are difficult to be removed by ventilation or air purification. Photocatalytic oxidation technology has bright prospects in the field of indoor air purification, but its performance on removing indoor SVOCs is still unclear. In this study, we found that the commonly-used photocatalyst (P25titanium dioxide) could effectively degrade two typical indoor SVOCs (dibutyl phthalate (DnBP) and tri (2-chloropropyl) phosphate (TCPP)) under the irradiation of both a 254 nm ultraviolet lamp and a fluorescent lamp, and the degradation process could be described by the first-order kinetic equation. Under the irradiation of fluorescent lamp, DnBP and TCPP were completely degraded within 120 and 42h, respectively, being significantly faster than the removal rate of ventilation and air purification for these two SVOCs. Furthermore, the degradation products and corresponding pathways of DnBP and TCPP were analyzed by gas chromatography-mass spectrometry coupled with proton transfer reaction time-of-flight mass spectrometer.

导出引用

朱玉杰, 刘璧源, 盖浩南, 段星宇, 曹建平, 黄海保. 室内典型半挥发性有机物的光催化降解[J]. 中国环境科学. 2025, 45(5): 2390-2398

ZHU Yu-jie, LIU Bi-yuan, GE Hao-nan, DUAN Xing-yu, CAO Jian-ping, HUANG Hai-bao. Photocatalytic degradation of typical semi-volatile organic compounds in indoor environments[J]. China Environmental Science. 2025, 45(5): 2390-2398

中图分类号： X51

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