改性钛基PbO<sub>2</sub>电极对有机污染物的降解性能——以甲基橙和4-硝基苯酚为例

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Abstract Ti/SnO₂-Sb/Ce-PbO₂ electrode was prepared by sol-gel method and electrochemical deposition method. The surface morphology, crystal structure and electrochemical performance of the prepared electrode were analysed, and the degradation effect of the electrode on methyl orange and 4-nitrophenol was further investigated. The results showed that the Ti/SnO₂-Sb/Ce-PbO₂ electrode has a more stable structure, has a better electrochemical activity compared with other electrodes, and that its oxygen evolution potential can reach 1.56V. The optimal operating conditions were set at an interelectrode spacing of 2cm, at a current density of 30mA/cm², at a concentration of the target pollutant of 100mg/L, and at an electrolyte concentration of 0.10mol/L. As electrolysis time reached 120min with the Ti/SnO₂-Sb/Ce-PbO₂ electrode, the removal efficiency of methyl orange and 4-nitrophenol reached 99.59% and 96.16%, respectively. After 180min of degradation, the TOC removal efficiency reached 56.71% and 54.87%, respectively. The results provide a technical support for the Ti/SnO₂-Sb/Ce-PbO₂ electrode to degrade organic pollutants.

Key words： Ti/SnO₂-Sb/Ce-PbO₂ electrode electrocatalytic degradation methyl orange 4-nitrophenol

Received: 08 June 2021

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X703

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	Articles by authors
	YUE Wen-qing
	NI Yue
	SUN Ze-peng
	LIU Fen-wu
	BI Wen-long
	CHEN Zi-ming
	WEI Yi-wen

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YUE Wen-qing,NI Yue,SUN Ze-peng等. Degradation of organic pollutants by modified titanium based PbO₂ electrode: Taking methyl orange and 4-nitrophenol as examples[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(2): 706-716.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I2/706

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