摘 要：本论文以凹凸棒土（标记为ATT）为催化剂载体，采用水热法和共沉淀方法制备了一系列不同比例的磁性分离型凹土-ZnFe2O4-BiOCl复合光催化剂（标记为ATT-ZnFe2O4-BiOCl-w,w=n(ZnFe2O4)/n(BiOCl)）。通过X射线粉末衍射（XRD）、紫外-可见漫反射光谱（UV-Vis）和扫描电子显微镜（SEM）等技术对产物晶相组成、光吸收特性和表面形貌进行了表征，并评价了样品的可见光光催化性能和磁性性能。结果表明，ZnFe2O4、BiOCl能够均匀高效地负载于ATT表面，所得的光催化剂既具有优良的磁分离特性又具有很好的可见光降解甲基橙活性，而且此光催化剂的性能与其比例密切相关。当光照时间达到180 min时，ATT-ZnFe2O4-BiOCl-13%对10 mg/L甲基橙的降解率达到96。90%。磁性的性能研究表明，ATT-ZnFe2O4-BiOCl可以通过强磁铁非常方便地从溶液中回收，但是重复利用效果不理想，合成工艺有待进一步改善。93555

毕业论文关键词：凹土，BiOCl，磁性光催化剂，可见光，水热法，原位-沉积法

Abstract: In this article, a series of different proportions of ZnFe2O4 and BiOCl were introduced onto attapulgite’s surface via hydrothermal method and in-situ precipitation method to fabricate magnetically recoverable composite photocatalysts (marked as ATT-ZnFe2O4-BiOCl-w, w=n(ZnFe2O4)/n(BiOCl)) 。 The crystal composition, photoabsorption performance and morphology of prepared samples were characterized by XRD、UV-Vis and SEM techniques。 Moreover, the catalytic activity under the visible-light and the magnetic performance of samples were rated。 It was found that ZnFe2O4 and BiOCl composite particles were evenly and efficiently loaded on the surface of ATT。 The obtained photocatalysts possess perfect magnetic separation and exceptional photocatalytic activity。 Moreover, the photocatalytic activity is related to the proportion of photocatalyst components。 The degradation rate of 10 mg/L methyl orange by ATT-ZnFe2O4-BiOCl-13% reached to 96。90% under the visible light for 180 minute。 Magnetic studies show that ATT-ZnFe2O4-BiOCl could be easily recovered by the strong magnet。 However, the photocatalytic activity of recycled sample is not desired, so the synthetic process needs to be further improved。源C于H优J尔W论R文M网WwW.youeRw.com 原文+QQ752-018766

Keyword: Attapulgite , ZnFe2O4-BiOCl , magnetic photocatalyst , Visible light , Hydrothermal method , In-situ precipitation method 

目   录

1  前言 4

2  实验内容 5

2。1  试剂和仪器 5

2。2  复合光催化剂的制备 5

2。2。1  ATT悬浊液的制备 5

2。2。2  ATT-ZnFe2O4光催化剂制备 6

2。2。3  ATT-ZnFe2O4-BiOCl光催化剂来自优I尔Q论T文D网WWw.YoueRw.com 加QQ7520~18766 制备 6

2。3  材料表征 6

2。4  材料的光催化性能 7

3  结果与讨论 7

3。1  催化剂的表征 7

3。1。1  XRD结果分析 7

3。1。2  SEM结果分析 9

3。1。3  BET结果分析 10

3。1。4  UV-vis 11

3。2  催化剂的催化性能研究 13

3。3磁学性能分析