Efficient photocatalytic removal of phthalates easily implemented over a bi-functional {001}TiO2 surface

Gu，Xiaotong1; Qin，Ning2,3; Wei，Guangfeng1; Hu，Yiqiong1; Zhang，Ya nan1; Zhao，Guohua1

2021

10.1016/j.chemosphere.2020.128257

CHEMOSPHERE   影响因子和分区

0045-6535

1879-1298

It is stubborn to remove the lowly concentrated phthalic acid esters (PAEs) that usually coexist with other highly concentrated but low-toxic pollutants in municipal sewage. Herein, we report a novel strategy for completely removing the PAEs over a bi-functional {001}TiO2 surface (with highly exposed {001} facet), which not only serve as functional sites to specifically adsorb the target PAEs pollutants, but also contribute to an enhanced oxidation ability. The adsorption behavior of PAEs on {001}TiO2 is analyzed deeply through kinetic experiments combining with in situ ATR-FTIR spectroscopy and theoretical calculations. The results reveal that the adsorption capacities of PAEs on {001}TiO2 are about 4-5 times higher than that on TiO2, both of which follow the pseudo-second-order and Langmuir model. This is mainly attributed to the interfacial Lewis Acid-Base Pair between {001} facet Ti-5c sites and C=O of PAEs. Benefitting from the specific adsorption capability toward target pollutant and enhanced oxidation ability of {001} facets, nearly 100% of DMP or DEP in simulated wastewater can be eliminated by {001} TiO2 within 2 h illumination, and the relevant degradation rate constants (k) (3.67 h(-1) for DMP and 2.19 h(-1) for DEP) are 5.73 and 3.08 folds higher than that of pure TiO2, respectively. In the application of municipal wastewater, nearly 76% of DMP and 85% DEP can be eliminated by {001}TiO2 within 2 h illumination, which are nearly 3-6 fold higher than that of pure TiO2. (C) 2020 Elsevier Ltd. All rights reserved.

Phthalates {001}TiO2 Bi-functional surface Specific adsorption Photocatalytic removal

SCI ; EI

英语

其他

National Natural Science Foundations of China (NSFC)[21876133,21876128,21537003] ; Science & Technology Commission of Shanghai Municipality[14DZ2261100] ; State Key Laboratory of Pollution Control and Resource Reuse Foundation[PCRRF18013]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000595802200308

PERGAMON-ELSEVIER SCIENCE LTD

20203709179172

Degradation ; Esters ; Sewage ; Fourier transform infrared spectroscopy ; Pollution ; Rate constants ; Adsorption

Sewage:452.1 ; Chemistry:801 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2

ENVIRONMENT/ECOLOGY

Web of Science

1.School of Chemical Science and Engineering,Shanghai Key Lab of Chemical Assessment and Sustainability,Key Laboratory of Yangtze River Water Environment,Tongji University,Shanghai,200092,China
2.Department of Mechanical Engineering,City University of Hong Kong,Kowloon,83 Tat Chee Avenue,Hong Kong
3.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Gu，Xiaotong,Qin，Ning,Wei，Guangfeng,et al. Efficient photocatalytic removal of phthalates easily implemented over a bi-functional {001}TiO2 surface[J]. CHEMOSPHERE,2021,263.

Gu，Xiaotong,Qin，Ning,Wei，Guangfeng,Hu，Yiqiong,Zhang，Ya nan,&Zhao，Guohua.(2021).Efficient photocatalytic removal of phthalates easily implemented over a bi-functional {001}TiO2 surface.CHEMOSPHERE,263.

Gu，Xiaotong,et al."Efficient photocatalytic removal of phthalates easily implemented over a bi-functional {001}TiO2 surface".CHEMOSPHERE 263(2021).