Tix-Ni1-x-MOFs的制备及其CO选择性催化还原NOx研究

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Abstract Ti_x-Ni_1-x-MOFs catalysts with different proportions were successfully synthesized by solvothermal method and microwave method, applied for selective catalytic reduction reaction of NO_x with CO. The doping of Ti significantly improved NO_x reduction performance of Ni-MOF catalysts and widened reaction temperature window. Ti_0.2-Ni_0.8-MOF showed the best denitration efficiency and reached 100% conversion in the temperature range of 200~400℃. Multiple characterizations were conducted to ascertain the properties of bimetallic Ti_x-Ni_1-x-MOFs materials (e.g., TGA, XRD, SEM, FT-IR, XPS and BET). Ti-doping in Ni-MOF can improve the atomic dispersion, and indicate a strong metal-metal interaction between Ti and Ni which was conducive to produce more efficient Ni-O-Ti sites and oxygen vacancies, strengthen the Ni²⁺+Ti⁴⁺ ↔ Ni³⁺+Ti³⁺ redox cycle, and thus improve the catalytic performance of NO reduction reaction by CO. Compared with solvothermal method, the preparation of Ti_0.2-Ni_0.8-MOF by microwave method exhibits the advantages of high synthesis efficiency, good crystallinity, fine and uniform grains, which further enhancing its low-temperature denitration effect.

Key words： CO-SCR metal-organic frameworks Ti_x-Ni_1-x-MOFs microwave method solvothermal method

Received: 25 April 2022

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X511

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	Articles by authors
	SHI Yong
	LI Cheng
	HUANG Lei
	XIONG Wei
	ZHAO Qi-dong
	SUN Jiang-heng
	DING Yue

Cite this article:

SHI Yong,LI Cheng,HUANG Lei等. Preparation of Ti_x-Ni_1-x-MOFs and their selective catalytic reduction of NO_x by CO[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(11): 5080-5087.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I11/5080

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