摘要：本文以凹凸棒土（ATP）为载体，通过水热法制备ZnFe2O4并沉淀于凹凸棒土表面，随后将不同比例的BiOBr（ZnFe2O4与BiOBr物质的量之比1：0。1,1：0。2,1:0。3）沉淀于第一步产品表面制得凹凸棒土-ZnFe2O4-BiOBr复合光催化材料（标记为ATP-ZnFe2O4-BiOBr）。借助XRD、SEM、BET、UV-Vis等测试手段对产物进行了表征。表征结果表明，ZnFe2O4、BiOBr均匀高效地负载于凹凸棒土表面，所得的复合光催化材料既具有较好的可见光降解活性又具有良好的磁分离特性。再以可见光光催化甲基橙为探针反应，考察了不同材料对光催化性能的影响。结果表明：与纯ATP和ZnFe2O4相比，ATP-ZnFe2O4-BiOBr-1:0。2复合材料显示出优异的可见光光催化性能；光照2h后，ATP-ZnFe2O4-BiOBr复合材料对甲基橙的降解率达到95。53%。磁性的性能研究表明，ATP-ZnFe2O4-BiOBr能通过强磁铁很方便地从溶液中回收。91368

毕业论文关键词：凹凸棒土，磁性光催化材料，水热反应，光催化

Abstract ： In this paper, attapulgite-ZnFe2O4-BiOBr composite photocatalyst (labeled ATP-ZnFe2O4-BiOBr) were synthesized via loading different proportion of ZnFe2O4 and BiOBr (nZnFe2O4/nBiOBr = 1:0。1, 1:0。2, 1:0。4) onto the surface of ATP by hydrothermal method and depositing technique respectively。 The products were characterized by means of XRD, SEM, BET, UV-Vis。 The characterization results show that ZnFe2O4 and BiOBr were uniformly and efficiently loaded on the surface of ATP。 The photocatalytic performance of obtained products were studied by visible light photodegradation of methyl orange as the probe reaction。  The results revealed that the obtained composite photocatalyst exhibited highly visible light degradation activity and wonderful characteristics of magnetic separation。  Comparing to ATP and ZnFe2O4, ATP-ZnFe2O4-BiOBr composite showed excellent visible light photocatalytic performance and the degradation rate of methyl orange was 95。53% within 2h。 Magnetic properties showed that ATP-ZnFe2O4-BiOBr could be easily recovered from the solution by strong magnets。

Key  word: attapulgite, magnetic   photocatalytic  material, hydrothermal reaction, Photocatalysis

目录

1 前言 1

2 实验内容 2

2。1 试剂和仪器 2

2。2 复合光催化剂的制备 2

2。2。1 ATP悬浊液的制备 2

2。2。2 ATP-ZnFe2O4光催化剂制备 2

2。2。3 ATP-ZnFe2O4-BiOBr光催化剂制备 2

2。3 材料表征 3

2。4 材料的光催化性能 3

3 结果与讨论 4

3。1 催化剂的表征 4

3。1。1 XRD结果分析 4

3。1。2 SEM结果分析 5

3。1。3 BET结果分析