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1、第44卷第9期應(yīng)用化工Vol_44No.92015年9月AppliedChemicalIndustrySep.2015NiB/PVDF—PVA納米纖維催化劑的制備及其應(yīng)用李芳,鄭權(quán),李其明,付琛,郭瑞東(1.遼寧石油化工大學(xué)化學(xué)化工與環(huán)境學(xué)部,遼寧撫順113001;2.遼寧石油化工大學(xué)教育實驗學(xué)院,遼寧撫順113001)摘要:通過靜電紡絲技術(shù)首先制備了NiC1/PVDF—PVA復(fù)合高分子納米纖維,通過原位還原法得到了PVDF—PVA復(fù)合納米纖維負(fù)載NiB的非晶態(tài)合金催化劑,并把該催化劑用于NaBH水解制氫反應(yīng)。SEM表征表明,NiC1/PVDF—PVA復(fù)合納米纖維具有纖細(xì)微觀納米形貌,纖維直徑
2、均勻,介于50—200am。TG分析表明,NiC1:/PVDF—PVA納米纖維可以穩(wěn)定到大約390℃,超過該溫度納米纖維開始發(fā)生熱解,說明該納米纖維催化劑載體具有適于硼氫化鈉水解反應(yīng)的熱穩(wěn)定性。接觸角測試表明,PVA共紡顯著提高了PVDF納米纖維的親水性,有利于NaBH和水分子在催化劑表面上的接觸反應(yīng)。水解制氫實驗表明,PVA共混靜電紡絲法得到的NiB/PVDF—PVA較NiB/PVDF催化劑催化活性顯著提高,該催化劑具有較好的應(yīng)用前景。關(guān)鍵詞:NiB/PVDF—PVA;靜電紡絲;納米纖維;制氫中圖分類號:TQ426.65;O643.36文獻(xiàn)標(biāo)識碼:A文章編號:1671—3206(2015)0
3、9—1602—05PreparationandapplicationofNiB/PVDF—PVAnanofibercatalystL/Fang,ZHENGQuan,LIQi—ruing,F(xiàn)UChen,GUORui—dong(1.CollegeofChemistry,ChemicalEngineeringandEnvironmentalEngineering,LiaoningShihuaUniversity,F(xiàn)ushun113001,China;2.EducationExperimentalSchool,LiaoningShihuaUniversity,F(xiàn)ushun113001,China)Ab
4、stract:NiC12/PVDF—PVAcompositenanofiberswerepreparedviaelectmspinningtechnique,andthenNiB/PVDF—PVAnanofibercata1)stcanbepreparedbyin—situreduction.Thiscatalystwasappliedinhydro—genproductionfromhydrolysisofNaBHd.SEMcharacterizationshowedthatthewell—definednanoscaledmi—crostructurecanbeobtainedforNiB
5、/PVDF—PVAcompositenanofiber.whichpossessesunifonTlnanofiberdiameterf5O~200nm).TGanalysisrevealedthatNiB/PVDF.PVAnanofibercatalystcanbestableuptoapproximately390QcwhichissuitabletobeusedinhydrolysisofNaBHd.Themeasurementofwatercon—tactangleindicatedthatthewettabilityofPVDF—PVAnanofiberiSbetterthantha
6、tofpurePVDFnanofiberduetohydrophilicPVAdoping.TheresultsshowedthatthecatalyticactivityofNiB/PVDF-PVAcompositecatalystcanberemarkablyimprovedthroughthedopingofhydrophilicPVAcomparedwithNiB/PVDFcat—alysts.Hence,NiB/PVDF—PVAnanofibercatalysthasanextensiveapplicationprospect.Keywords:NiB/PVDF—PVA;electr
7、ospinning;nanofiber;hydrogenproduction近年來,氫氣作為一種更加環(huán)保的能源載體受不排放副產(chǎn)物氣體,氫氣理論純度100%,理論儲氫到人們的密切關(guān)注,特別是隨著氫燃料電池技術(shù)的密度高達(dá)10.8%。發(fā)展與完善,高效儲氫成為制約氫能發(fā)展的關(guān)鍵技NaBH與H0反應(yīng)的方程式如下:術(shù)難題¨引。如何實現(xiàn)安全高效儲氫和提高儲氫密NaBH4+H2O---~NaBO2+H2度成為眾多