Preparation and Photocatalytic Properties of BiFe1-xMnxO3 Nano-powders
DU Ze1, ZHAO Yuling1, KUANG Daihong1,2,*, HOU Liang1, YAN Chao2, YANG Fangyuan2
1 College of Resources and Environment, Xinjiang Agricultural University, Urumqi 830052, China 2 College of Mathematics and Physics, Xinjiang Agricultural University, Urumqi 830052, China
Abstract: BiFe1-xMnx 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.
通讯作者:
*匡代洪,2000年毕业于新疆大学,获得学士学位;2006年毕业于新疆大学,获得硕士学位;2016年毕业于中山大学,获得博士学位。现为新疆农业大学数理学院副教授、硕士研究生导师。主要从事铁酸铋纳米材料的制备及性能研究。发表论文40余篇,包括Journal of Magnetism and Magnetic Materials、Journal of Alloys and Compounds、Journal of Sol-Gel Science and Technology、Journal of Materials Science:Materials in Electronics等。416799621@qq.com
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2023, Vol. 37 
