CuCr02-W03的制备及光催化产氢性能-论文.pdf

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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