CeO<sub>2</sub>形貌结构对催化湿式空气氧化苯酚性能的影响

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Abstract Three CeO₂ catalytic materials with different morphologies were prepared with hydrothermal method, precipitation method and sol-gel method, and then used in Catalytic Wet Air Oxidation (CWAO) of phenol aqueous solution. The effect of CeO₂ morphology and structure on the performance of CWAO of phenol aqueous solution was investigated. The CeO₂ catalytic materials were characterized via SEM, TEM, XRD and TPR. The results indicated that the CeO₂ catalytic material synthesized with the hydrothermal method exhibited the best catalytic activity mainly due to the nanorod morphology, which exposed (220) crystal surface, growing along (220) crystal direction. Under the reaction conditions of temperature of 200℃, the air pressure of 2MPa, and the initial concentration of phenol at 500mg/L, the final COD removal rate (240min) could reach as high as 95.5%.

Key words： CeO₂ phenolic catalytic wet air oxidation COD removal rate

Received: 04 February 2020

PACS:

X703.5

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	ZHANG Xuan-jiao
	SUN Yu
	LIU Ming
	HAO Shu-min
	YANG Tao
	ZHANG Lei
	BAI Jin
	HAN Jiao

Cite this article:

ZHANG Xuan-jiao,SUN Yu,LIU Ming等. Effect of morphology on the performance of CeO₂ for catalytic wet air oxidation of phenol[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(10): 4330-4334.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I10/4330

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