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1、第27卷第10期无机材料学报Vol.27No.102012年10月JournalofInorganicMaterialsOct.,2012文章编号:1000-324X(2012)10-1073-06DOI:10.3724/SP.J.1077.2012.11796Co-BiVO4光催化剂的制备及其用于光催化氧化噻吩11112高晓明,付峰,武玉飞,张理平,李稳宏(1.延安大学化学与化工学院,陕西省化学反应工程重点实验室,延安716000;2.西北大学化工学院,西安710069)摘要:采用水热法制备了掺杂型可见光催化剂Co-BiVO4,用X射线衍射(XRD)、扫描电子显微镜(SEM)、紫
2、外−可见漫反射(DRS)和低温氮吸附等表征手段对其结构性质进行了表征.结果显示,Co的掺杂没有改变BiVO4的晶相,在pH=7时制备的Co-BiVO4是单斜晶系白钨矿,晶型较完整.同时Co的掺杂延伸了BiVO4的可见光吸收范围,吸收边带明显红移,能隙禁带宽窄于纯BiVO4.低温氮吸附表明Co-BiVO4催化剂(pH=7)的孔半径主要分布在2.67nm附近.在空气–有机溶剂体系中,研究了Co-BiVO4氧化脱除FCC汽油中特征硫化物噻吩的效果.实验结果表明,催化剂加入量为1.0mg/L,空气通气量为150mL/min,氙灯光照3.0h,Co-BiVO4(pH=7.0)对模拟汽油的脱硫
3、率可达到86%.关键词:Co-BiVO4;光催化剂;氧化脱硫;噻吩中图分类号:TQ032文献标识码:APreparationofCo-BiVO4PhotocatalystandItsApplicationinthePhotocatalyticOxidativeThiophene11112GAOXiao-Ming,FUFeng,WUYu-Fei,ZHANGLi-Ping,LIWen-Hong(1.CollegeofChemistryandChemicalEngineering,ShaanxiKeyLaboratoryofChemicalReactionEngineering,Yan’
4、anUni-versity,Yan’an716000,China;2.CollegeofChemicalEngineering,NorthwestUniversity,Xi’an710069,China)Abstract:TheCo-BiVO4photocatalystwaspreparedbyhydrothermalmethodandcharacterizedbyX-raydiffrac-tion,scanningelectronmicroscope,UV-Visabsorptionspectroscope,andlow-temperatureN2adsorption.Thech
5、aracterizedresultsindicatethathighlycrystallinemonoclinicscheelitestructureofCo-BiVO4isobtainedatpH=7andtheCodopantdoesnotchangethecrystalphaseofBiVO4.TheCo-BiVO4hasasignificantred-shiftintheab-sorptionbandinthevisibleregion,anditsabsorptionintensityincreasesgreatlyforthedopedcatalystcomparedw
6、ithpureBiVO4.Low-temperatureN2adsorptionresultrevealsthattheporesizeoftheCu-BiVO4(pH=7)mostlydistributesat2.67nm.ThedesulfurizationabilityofCo-BiVO4wasresearchedbyphotocatalyticoxidationofthio-pheneinvisiblelight.TheresultsshowthattheCo-BiVO4photocatalystsexhibithigherphotocatalyticactivitiesf
7、ordegradationofthiopheneundervisiblelightirradiation.WhenpHvalueis7.0andthehydrothermalsynthesizetimeis8h,thephotocatalyticactivitiesreachthemaximum.Undertheconditionsof150mL/minairflow,1.0mg/Lcatalystamount,andvisiblelightirradiationfo
