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时间:2020-05-04
《CuCr02-W03的制备及光催化产氢性能-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第65卷第9期化工学报V_01.65No.92014年9月CIESCJournalSeptember2014祈莠:::m)333;jjjCuCrO2.WO3的制备及光催化产氢性能王桂赞,刘先平,赵茜,王延吉,林瑞榕(河北工业大学化工学院,绿色化工与高效节能河北省重点实验室,天津300130)摘要:作为分解水制氢用光催化剂,p-n半导体物质的复合体具有较好的开发前景。燃烧法合成了P型半导体物质CuCrO2,钨酸分解法合成了n型半导体物质WO3,在此基础上经机械研磨及热处理的方法制备了CuCrO,.WO和Ru/(C
2、uCrO2.WO3)复合光催化剂。对制得的样品进行了x射线衍射(XRD)、紫外可见漫反射(UV-VisDR)、扫描电镜(SEM)及X射线光电子能谱(XPS)表征分析。测定了CuCrO2、WO3、CuCrO2一WO3及Ru/(CuCrO2.WO3)在氙灯照射下的产氢活性,考察了研磨介质pH及钌负载量对CuCrO:.WO光催化活性的影响。实验结果表明,CuCrO2和WO3单独使用时几乎没有活性,而复合催化剂CuCrO2.WO3在以甘油为电子给体的情况下具有产氢活性,研磨介质pH对复合催化剂的活性影响较大;负载钌后C
3、uCrO2.WO3的活性得到进一步的提高,能分解纯水放出氢气,以0.5%Ru/(CuCrO2.WO3)为光催化剂,在300W氙灯照射下,3h内分解纯水放出氢气约10~tmol。关键词:分解水;光催化;p-n复合;氢;催化剂DOh10.3969~.issn.0438—1157.2014.09.020中图分类号:O643文献标志码:A文章编号:0438—1157(2014)O9—3457一O7PreparationofCuCrO2-WO3anditsphotoeatalytieperformanceforhydro
4、genproductionWANGGuiyun,LIUXianping,ZHAOQian,WANGYanji,LINRuirong(SchoolofChemicalEngineering,HebeiUniversityofTechnology,HebeiProvincialKeyLaboratoryofGreenChemicalTechnology&HighEficiencyEnergySaving,Tianjin300130,China)Abstract:TheprincipleofP-ntypesemico
5、nductorcompositephotocatalystsisdiscussedasastrategytodevelopeficientphotocatalystsforwaterspliUing.Compositeofp-typeandn-typesemiconductorhasanadvantageintakingfulluseofeachsemiconductor’Sfunctionofoxidationandreduction,whichcouldfacilitatethephoto—inducede
6、lectron/holepairs’separationbytheinnerelectricfield,enhancingthephotocatalyticeficiencyofthesystem.CuCrO2wassynthesizedbyanovelcombustionreactionmethodwithglycerinasfuel,andWO3waspreparedbythetungstenaciddecompositionmethod.TheconfigurationsCuCr02-WO3andRu/(
7、CuCrO2-WO3)weresuccessfullypreparedbymechanicalgrindingandheat—treatment.ThepreparedsampleswerecharacterizedbyusingX—raydiffraction(XRD),ultraviolet—visiblediffusereflectance(UV-visDR),scanningelectronmicroscope(SEM)andX—rayphotoelectronspectroscopy(xPs).The
8、photocatalyticactivitiesofCuCrO2,WO3,CuCrO2.WO3andRu/(CuCrO2一wo3)wereevaluatedunderxenonlampirradiation.ThefactorsincludingpHofgrindingmediaandRuloadingwerealsoinvestigated.Whenglycerinwasusedas
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