Complete Photocatalytic Mineralization of Microplastic on TiO2 Nanoparticle Film

被引：281

作者：

Nabi, Iqra ^{[1
]}

Bacha, Aziz-Ur-Rahim ^{[1
]}

Li, Kejian ^{[1
]}

Cheng, Hanyun ^{[1
]}

Wang, Tao ^{[1
]}

Liu, Yangyang ^{[1
]}

Ajmal, Saira ^{[1
]}

Yang, Yang ^{[1
]}

Feng, Yiqing ^{[1
]}

Zhang, Liwu ^{[1
,2
]}

机构：

[1] Fudan Univ, Dept Environm Sci & Engn, Shanghai Key Lab Atmospher Particle Pollut & Prev, Shanghai 200433, Peoples R China

[2] Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

来源：

ISCIENCE | 2020年 / 23卷 / 07期

基金：

中国国家自然科学基金; 上海市自然科学基金;

关键词：

DEGRADATION; POLYSTYRENE; NANOCOMPOSITE; POLYETHYLENE; OXIDATION; NANOPLASTICS; ENVIRONMENT; ENHANCEMENT; NANO-TIO2; PLASTICS;

D O I：

10.1016/j.isci.2020.101326

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Recently, the environmental impacts of microplastics have received extensive attention owing to their accumulation in the environment. However, developing efficient technology for the control and purification of microplastics is still a big challenge. Herein, we investigated the photocatalytic degradation of typical microplastics such as polystyrene (PS) microspheres and polyethylene (PE) over TiO2 nanoparticle films under UV light irradiation. TiO2 nanoparticle film made with Triton X-100 showed complete mineralization (98.40%) of 400-nm PS in 12 h, while degradation for varying sizes of PS was also studied. PE degradation experiment presented a high photodegradation rate after 36 h. CO2 was found as the main end product. The degradation mechanism and intermediates were studied by in situ DRIFTS and HPPI-TOFMS, showing the generation of hydroxyl, carbonyl, and carbon-hydrogen groups during the photodegradation of PS. This study provides a green and cost-efficient strategy for the control of microplastics contamination in the environment.

引用

页数：40

共 62 条

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