利用FeS2 奈米晶體敏化TiO2光電極在 近紅外光電化學產氫之研究

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dc.contributor陳家俊zh_TW
dc.contributorChia-Chun Chenen_US
dc.contributor.author陳廷睿zh_TW
dc.contributor.authorTing-Ruei Chenen_US
dc.date.accessioned2019-09-04T09:22:09Z
dc.date.available2018-6-27
dc.date.available2019-09-04T09:22:09Z
dc.date.issued2013
dc.description.abstract在本研究中，利用溶液法合成二硫化鐵奈米晶體 (FeS2 NCs)組裝在二氧化鈦 (TiO2)薄膜表面，作為近紅外光敏化劑應用於光電化學系統 (PEC)進行水分解產氫。研究中先利用溶膠凝膠法製備 TiO2/FTO，並以溶液法合成 FeS2，旋鍍於 TiO2/FTO上，形成 FeS2/TiO2/FTO異質接面光電極。 實驗中利用近紅外光雷射 (波長=808nm 強度=300mW/cm2 )照射光電極，採用 0.25M Na2S + 0.35M Na2SO3作為電解液。相較於單純 TiO2以及利用硫化鉛 (PbS)、硒化鉻 (CdSe)取代 FeS2之光電極，相較之下， FeS2/TiO2/FTO異質接面光電極對近紅外光有較佳的表現，在外電壓 0.9V vs. RHE時有最佳飽和光電流密度 6 mA/cm2 ，光電流轉換效率為0.86%，其理論產氫速率約為2.5mL/cm2-h。 最後我們呈現出以地球含量多且非毒性的FeS2結合金屬氧化物所形成的異質接面光電極，在近紅外光下有優異的光電化學產氫之表現，這在利用近紅外光能量產氫技術發展中，是相當重要的一環。zh_TW
dc.description.abstractIn this study, we demonstrated the sensitizer of near infrared (NIR) based on solution processable pyrite FeS2 NCs spun onto porous TiO2 films (FeS2/TiO2/FTO film) for Photoelectrochemical (PEC) hydrogen generation. Experimentally, for fabricating a FeS2/TiO2/FTO film, a TiO2/FTO substrate was first prepared by sol-gel method. Then, FeS2 NCs were spun onto TiO2/FTO substrate to form FeS2/TiO2/FTO heterojunction photoanode. PEC cell of FeS2/TiO2/FTO film were placed in the electrolyte of 0.25M Na2S and 0.35M Na2SO3 and illuminated under NIR laser (808nm, I0=300mW/cm2). Compared with lead sulfide (PbS), cadmium selenide (CdSe) on TiO2 photoanode, FeS2/TiO2/FTO heterojunction photoanode show a better NIR photoactivity and higher saturation current density (6mA/cm2 at 0.9V vs. RHE). The conversion efficiency of photoelectrochemical cell to hydrogen was 2.64%, leading to 2.5mL/cm2-h. In summary, we demonstrated that the earth-abundant and non-toxic FeS2 nanocrystals /metal oxides heterojunction photoanode showed an excellent performance of PEC hydrogen generation under NIR. It’s important step to further improve the overall PEC performance by absorbing light extended to NIR range.en_US
dc.description.sponsorship化學系zh_TW
dc.identifierGN060042071S
dc.identifier.urihttp://etds.lib.ntnu.edu.tw/cgi-bin/gs32/gsweb.cgi?o=dstdcdr&s=id=%22GN060042071S%22.&%22.id.&
dc.identifier.urihttp://rportal.lib.ntnu.edu.tw:80/handle/20.500.12235/100381
dc.language中文
dc.language英文
dc.subject二硫化鐵zh_TW
dc.subject近紅外光zh_TW
dc.subject光電化學zh_TW
dc.subject產氫zh_TW
dc.subjectPyriteen_US
dc.subjectNIRen_US
dc.subjectPhotoelectrochemicalen_US
dc.subjectHydrogen generationen_US
dc.title利用FeS2 奈米晶體敏化TiO2光電極在 近紅外光電化學產氫之研究zh_TW
dc.titleNIR Photoelectrochemical hydrogen generation using Pyrite FeS2 Nanocrystals sensitized TiO2 photoelectrodesen_US

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