摘 要：本文采用硅烷偶联剂KH560接枝改性后的凹凸棒土为催化剂载体，以纳米 TiO2 –SnO2作为光催化材料， 以FexOy为磁性核心，通过原位沉积和原位溶胶-凝胶法，依次将FexOy、TiO2 -SnO2高效负载于凹土表面，以期获得兼具磁性和高效光催化性能，而且价格低廉的复合光催化材料。采用 XRD，SEM，BET和UV-Vis分析手段对产物进行了表征，研究结果表明产物的包覆效果好、比表面大，而且具有较好的磁性。用紫外光催化降解对硝基苯胺为探针，考察了系列光催化材料的光催化性能的影响。 结果表明：随着偶联剂KH560投入量的增加，ATT-FexOy-TiO2-SnO2的光催化性能逐渐增强，当偶联剂的量为5ml时，复合材料的光催化效果最佳，光降解3 h后，对硝基苯胺的降解率达88。26%；同时ATT-FexOy-TiO2-SnO2复合光催化材料可以用永磁铁很轻易的从反应溶液中回收、再利用。91499

毕业论文关键词：磁性光催化剂， FexOy-TiO2-SnO2，凹凸棒土，KH560，紫外光催化

Abstract： In this paper, a novel photocatalytic material which had magnetic, high efficiency photocatalytic performances and low costs was synthesized via loading FexOy and TiO2-SnO2 on the surface of the attapulgite using in situ deposition and in situ sol-gel method。 In this composite photocatalyst, the attapulgite acted as the carrier, which was modified by silane coupling agent KH560, nano-TiO2-SnO2 used as the photocatalytic material and FexOy worked as the magnetic core。 The product was characterized by XRD, SEM, BET and UV-Vis analysis。 The results showed that the composite exhibit good coating effect, larger specific surface area and superior magnetic properties。 The photocatalytic activity of ATT-FexOy-TiO2-SnO2 composite was investigated by photodegradation p-nitroaniline under ultraviolet light。 Results showed that the photocatalytic activity of ATT-FexOy-TiO2-SnO2 increased with the incensement of the amount of coupling agent KH560。 When the amount of coupling agent was 5mL, the photocatalytic performance of composite was the best, and the degradation rate of p-nitroaniline was 88。26% after illuminating 3h。 On the other hand, ATT-FexOy-TiO2-SnO2 composite photocatalyst can be easily recovered from the reaction solution by permanent magnets。 

Key word: Magnetically photocatalysis, FexOy-TiO2-SnO2, Attapulgite, KH560, UV photocatalysis

目录

1  引言 1

2  实验部分 2

2。1  试剂和仪器 2

2。2  复合光催化剂源G于J优L尔V论N文M网WwW.youeRw.com 原文+QQ75201`8766 的制备 2

2。2。1  凹土的改性 2

2。2。2  ATT-FexOy的制备 2

2。2。3  ATT-FexOy-SnO2光催化剂制备 2

2。2。4  ATT-FexOy-SnO2-TiO2复合光催化剂的制备 3

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形貌分析 5

3。1。3。  BET分析 6

3。1。4  UV-vis漫反射分析 7

3。1。5。 磁学性能分析