BiFe1-xMnxO3纳米粉末的制备及光催化性能

doi:10.11896/cldb.21100037

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Abstract BiFe_1-xMn_x O₃ nanopowder samples (x=0.000, 0.015, 0.020, 0.025, 0.030) were prepared by the sol-gel method. The characters of the samples were analyzed by XRD, SEM, BET, XPS, DRS, PL, VSM, and so on. The results showed that the grain size and photoluminescence intensity of Mn-doped BiFeO₃ were decreased in different degree compared with BiFeO₃, and the specific surface area and total pore volume were both increased. Meanwhile, Mn-doped BiFeO₃ had stronger magnetism, which was recycled easily. The doped Mn was existed in the form of Mn⁴⁺, oxygen vacancy or adsorbed oxygen was increased, and the proportion of Fe²⁺ was decreased in BiFeO₃. The photocatalytic performance research results show that the photocatalytic degradation efficiency of Congo red was increased in Mn-doped BiFeO₃. Especially, the removal rate of Congo red was reached 93% for 2% Mn-doped BiFeO₃ nanopowders prepared at 550 ℃, and the COD concentration in sewage was reduced by 51%. The photocatalytic effect of Mn-doped BiFeO₃ was enhanced with the decrease of pH value of the solution. The Congo red was completely degraded by illumination for 30 min at pH=4. The most obvious inhibitory effects on the photocatalytic degradation of Congo red were HCO₃^- and H₂PO₄^-. Finally, the photocatalytic mechanism exploration experiments showed that the main active species in photocatalysis of BiFeO₃ were H₂O₂ and ·OH.

Key words： BiFeO₃ doping photocatalysis Congo red COD

Published: Online: 2023-07-10

CLC number:

O643

Fund:Natural Science Foundation of the Xinjiang Uygur Autonomous Region (2022D01A201).

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	Articles by authors
	DU Ze
	ZHAO Yuling
	KUANG Daihong
	HOU Liang
	YAN Chao
	YANG Fangyuan

Cite this article:

DU Ze,ZHAO Yuling,KUANG Daihong, et al. Preparation and Photocatalytic Properties of BiFe_1-xMn_xO₃ Nano-powders[J]. Materials Reports, 2023, 37(13): 21100037-8.

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http://www.mater-rep.com/EN/10.11896/cldb.21100037 OR http://www.mater-rep.com/EN/Y2023/V37/I13/21100037

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