摘要
该文采用低饱和态共沉淀法,辅助微波手段快速制备了β-CD插层含Fe水滑石(β-CD-Fe-LDHs)。利用IR、XRD和SEM对β-CD-Fe-LDHs和煅烧产物Calcined-β-CD-Fe-LDHs进行了结构和形貌表征,β-CD-Fe-LDHs具有片状水滑石的晶体结构,其煅烧产物粒子大小均匀。将Calcined-β-CD-Fe-LDHs应用于副品红溶液的水处理,探讨了不同光催化剂、反应温度、副品红溶液质量浓度以及使用寿命等条件对其去除性能的影响。结果显示,在最佳条件下,对50 mg/L的副品红溶液的去除率可达到95.70%,且重复使用5次后去除率仍可达到79.99%。其动力学研究表明,前40 min内在不同的Calcined-β-CD-Fe-LDHs质量浓度和不同副品红溶液初始质量浓度等条件下均符合一级反应动力学规律。Calcined-β-CD-Fe-LDHs可作为一种新型有效的光催化剂应用于副品红溶液的水处理中。
In this article,β--cyclodextrin （β-CD） intercalated ferrum-containing hydrotalcite was fleetly prepared by the technology of microwave-crystallization and low saturated state of coprecipitation. The purposed sample of β-CD-Fe-LDHs and calcined-β-CD-Fe-LDHs were characterized by means of XRD, IR and SEM. The results show that the synthesized β-CD-Fe-LDHs with the flexible slice have the structure of LDHs. The calcined product is in a uniform particle state. Calcined-β-CD-Fe-LDHs were then applied to the removal of parafuchsin. The effects of photocatalyst types, reaction temperature, parafuchsin mass concentration and cycle life on the parafuchsin removal were investigated. It is shown that the percentage of removal for parafuchsin solution of 50 mg/L can reach 95.70% under the optimum conditions,and the removal rate can still reach 79.99% even after 5 cycles. The kinetics curves of removal show that the removal is in accordance with the first-order kinetics model within the first 40 minutes under different photocatalyst mass concentrations and parafuchsin mass concentrations. The results suggest that calcined-β-CD-Fe-LDHs can be used as a novel and efficient photocatalyst for the removal of parafuchsin.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2014年第3期367-373,共7页
Fine Chemicals
基金
黑龙江省教育厅科学技术研究项目资助(1155G07)~~
关键词
Β-环糊精
水滑石
副品红
动力学
水处理技术与环境保护
β-CD
hydrotalcite
parafuchsin
kinetics
water treatment technology and environmental protection
