Effective degradation of tetracycline by mesoporous Bi2WO6 under visible light irradiation

Xiaolong CHU, Guoqiang SHAN, Chun CHANG, Yu FU, Longfei YUE, Lingyan ZHU

Front. Environ. Sci. Eng. ›› 2016, Vol. 10 ›› Issue (2) : 211-218.

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Front. Environ. Sci. Eng. ›› 2016, Vol. 10 ›› Issue (2) : 211-218. DOI: 10.1007/s11783-014-0753-y
RESEARCH ARTICLE
RESEARCH ARTICLE

Effective degradation of tetracycline by mesoporous Bi2WO6 under visible light irradiation

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Abstract

Bi2WO6 was synthesized with a hydrothermal method at different pHs and used for the degradation of tetracycline (TC) in water. The mesoporous Bi2WO6 prepared at pH 1 (BWO-1) displayed the highest adsorption and degradation capacity to TC due to its large surface area and more efficient capacity to separate photogenerated electrons and holes. 97% of TC at 20 mg·L−1 was removed by BWO-1 at 0.5 g·L−1 after 120 min irradiation under simulated solar light. Only 31% of the total organic carbon (TOC) was removed after 360 min irradiation although the TC removal reached 100%, suggesting that TC was mainly transformed to intermediate products rather than completely mineralized. The intermediates were identified by high-performance liquid chromatography-time of flight-mass spectrometry (HPLC-TOF-MS) and possible photodegradation pathways were proposed.

Keywords

Bi2WO6 / hydrothermal synthesis / tetracycline (TC) / photocatalysis

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Xiaolong CHU, Guoqiang SHAN, Chun CHANG, Yu FU, Longfei YUE, Lingyan ZHU. Effective degradation of tetracycline by mesoporous Bi2WO6 under visible light irradiation. Front. Environ. Sci. Eng., 2016, 10(2): 211‒218 https://doi.org/10.1007/s11783-014-0753-y

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Acknowledgements

This research was supported by Ministry of Science and Technology of China (Grant Nos: 2014CB932001 and 2012ZX07529-003), Tianjin Municipal Science and Technology Commission (13JCZDJC35900), and the Ministry of Education innovation team (IRT 13024).
ƒis available in the online version of this article at http://dx.doi.org/10.1007/s11783-014-0753-y and is accessible for authorized users.

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