&alpha;-Fe2O3/ZnFe2O4复合粉体制备及其光催化降解亚甲基蓝

彭超 吴照金

doi:10.12034/j.issn.1009-606X.216140

过程工程学报 >

2016 , Vol. 16 >Issue 5: 882 - 888

DOI: https://doi.org/10.12034/j.issn.1009-606X.216140

材料工程专栏

α-Fe2O3/ZnFe2O4复合粉体制备及其光催化降解亚甲基蓝

彭超吴照金

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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

网络出版日期: 2016-10-14

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

PENG Chao WU Zhao-jun

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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 date: 2016-02-29

Revised date: 2016-04-12

Online published: 2016-10-14

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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

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彭超吴照金 . α-Fe2O3/ZnFe2O4复合粉体制备及其光催化降解亚甲基蓝[J]. 过程工程学报, 2016 , 16(5) : 882 -888 . DOI: 10.12034/j.issn.1009-606X.216140

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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