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过程工程学报 ›› 2016, Vol. 16 ›› Issue (5): 882-888.DOI: 10.12034/j.issn.1009-606X.216140

• 材料工程专栏 • 上一篇    下一篇

α-Fe2O3/ZnFe2O4复合粉体制备及其光催化降解亚甲基蓝

彭超1,吴照金2   

  1. 1. 安徽工业大学冶金减排与资源综合利用教育部重点实验室
    2. 安徽工业大学安徽省冶金工程与资源综合利用重点实验室
  • 收稿日期:2016-02-29 修回日期:2016-04-12 出版日期:2016-10-20 发布日期:2016-10-14
  • 通讯作者: 吴照金

Preparation of α-Fe2O3/ZnFe2O4 Composite Powder and Its Photocatalytic Degradation to Methylene Blue

PENG Chao 1,WU Zhao-jun 2   

  1. 1. Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Ministry of Education, Anhui University of Technology
    2. Anhui Key Laboratory of Metallurgical Engineering & Resources Recycling, Anhui University of Technology
  • Received:2016-02-29 Revised:2016-04-12 Online:2016-10-20 Published:2016-10-14
  • Contact: WU Zhao-jun

摘要: 采用共沉淀?焙烧法制备了不同?-Fe2O3/ZnFe2O4摩尔比的?-Fe2O3/ZnFe2O4异质结复合粉体,考察了组分比对其光催化降解10 mg/L亚甲基蓝溶液活性的影响. 结果表明,与单相?-Fe2O3或ZnFe2O4相比,复合材料的光催化活性显著提高,?-Fe2O3/ZnFe2O4摩尔比1:1时光催化性能最佳,光学带隙为1.94 eV,对太阳光谱的利用率约为41%,210 min内对亚甲基蓝溶液的降解率达99.65%.

关键词: ?-Fe2O3/ZnFe2O4复合光催化剂, 异质结, 光降解, 亚甲基蓝

Abstract: A series of α-Fe2O3/ZnFe2O4 heterojunction photocatalysts with different molar ratios of ?-Fe2O3 to ZnFe2O4 were prepared by a simple precipitation?calcination method. The effect of component ratio on photocatalytic activity of ?-Fe2O3/ZnFe2O4 was evaluated through the degradation of methylene blue (MB) solution (10 mg/L) under irradiation of a xenon lamp (300 W). The results indicated that the ?-Fe2O3/ZnFe2O4 exhibited an enhanced photocatalytic activity than either the single-phase ?-Fe2O3 or ZnFe2O4. The ?-Fe2O3/ZnFe2O4 with a molar ratio of ?-Fe2O3 to ZnFe2O4 1:1 had an optical band gap of 1.94 eV, which can make use of approximately 41% of the solar spectrum. It delivered the beat photocatalytic activity among the tested component ratios, and its photodegradation rate of MB reached to 99.65% under the irradiation of the xenon lamp within 210 min.

Key words: ?-Fe2O3/ZnFe2O4 composite photocatalyst, heterojunction, photodegradation, methylene blue

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