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ID:52129564
大小:1.75 MB
页数:7页
时间:2020-03-23
《磁性Fe3O4∕改性焦炭的制备及其降解性能.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、化工进展2017年第36卷第7期CHEMICALINDUSTRYANDENGINEERINGPROGRESS·2577·磁性Fe304/改性焦炭的制备及其降解性能魏晓币,王光华,李文兵,万栋,刘阳,邵秋桐(武汉科技大学化学与化工学院,湖北武汉430081)摘要:以KOH为活化剂对焦炭进行活化制备改性焦炭,并采用原位氧化沉淀法制备出Fe,04/E受性焦炭,采用扫描电子显微镜(SEM)、N2吸附脱附(BET)、傅里叶交换红外光谱(FTIR)、X射线衍射(XRD)及振动样品磁强计(VSM)对样品进行袁征,并且研究了其对罗丹
2、明B的催化降解性能。结果表明,改性焦炭表面粗糙,孔结构发达,含氧官能团丰富,Fe304分散且牢固地负载于改性焦炭上,其粒径比纯Fe304小。Fe304/er支性焦炭具有超顺磁性,对罗丹明B的降解为拟一级反应,其降解的最佳条件为:催化剂用量为0.89/L,H202初始浓度为30mmol/L,pH为3.0,温度为35。C。Fe304与改性焦炭存在协同催化作用,罗丹明B的去除率可达98.85%。Fe30d改性焦炭是一种稳定、易磁分离回收利用的磁性催化剂。关键词:改性焦炭;磁性催化剂:类Fenton;降解:稳定性中图分类号:
3、TQ426.8文献标志码:A文章编号:1000—6613(2017)07—2577—07DoI:10.16085/j.issn.1000—6613.2016-2176PreparationanddegradationpropertiesofmagneticFe304/modifiedcokeWEIXiaobi,WANGGuanghua,L1Wenbing,WANDong,LIUYang,SHAOQiutong(SchoolofChemistryandChemicalEngineering,WuhanUniversit
4、yofScienceandTechnology,Wuhan430081,Hubei,China)Abstract:ModifiedcokewasfirstlypreparedfromcokebyKOHactivationandthenFe30dmodifiedcokewaspreparedbyin—situoxidationprecipitationmethod.Thecatalystandsampleswerecharacterizedbyscanningelectronmicroscopy(SEM),nitrog
5、enadsorptionisotherms(BET),Fouriertransforminfraredspectroscopy(FTIR),X—raypowderdiffractometer(XRD)andvibratingsamplemagnetometer(VSM),andthecatalyticdegradationperformanceofRhodamineB(RhB)wasstudied.Theresultsshowthatthemodifiedcokehasroughsurfaceandwell-deve
6、lopedporestructure.Moreover,theoxygen—containingfunctionalgroupsofmodifiedcokeareabundant.Fe304wasdispersedandfirmlyloadedonthemodifiedcoke,makingthelatterissmallerthanthepureFe304.Fe304/modifiedcokepossessedsuperparamagnetism,anditsdegradationofRhBcouldberegar
7、dedaspseudofirst—orderreaction.Thebestdegradationconditionswereasfollow:[catalysts]=0.89/L,initial【H202]=30mmol/L,pH=3.0andT=35。C.ThereisasynergisticeffectbetweenFe304andmodifiedcoke,givingrisetotheremovalrateofRhBof98.85%.Therefore,Fe30n/modifiedcokeisamagneti
8、ccatalystwithgoodstabilityandrecyclability.Keywords:modifiedcoke;magneticcatalyst;Fenton—like;degradation;stability随着工业的发展,水作为人类赖以生存的资源,面临着日渐严重的污染,工业废水的处理刻不容缓。Fenton法因反应条件温和
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