奈米二氧化鈦溶液摻雜硝酸鋰進行在可見光下光觸媒降解汙染物之研究

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dc.contributor鄧敦建zh_TW
dc.contributorTun-Chien Tengen_US
dc.contributor.author潘致容zh_TW
dc.contributor.authorChih-Jung Panen_US
dc.date.accessioned2019-09-03T12:10:42Z
dc.date.available2015-8-27
dc.date.available2019-09-03T12:10:42Z
dc.date.issued2013
dc.description.abstract本研究使用電泳沉積法(EPD)製備二氧化鈦(TiO2)鍍膜於不銹鋼基材上，並使用硝酸鋰(LiNO3)進行TiO2改質達到可見光降解污染物的目的。首先以二階合成法(two-step synthesis)製備TiO2/water奈米流體，並添加藻酸鹽(alginates)做為分散劑以提升奈米流體的懸浮性能與減少水電解時的氣泡問題。調配好的奈米流體進行相關特性檢測以及甲基藍(MB)光催化降解實驗。接著使用定電流電泳沈積法搭配不鏽鋼基材為電極，將TiO2沈積於正極之上形成TiO2鍍膜的試片。完成的試片使用光學顯微鏡(OM)與掃瞄式電子顯微鏡(SEM)檢視鍍膜試片表面的均勻度與裂痕來篩選出電泳沉積製程的最佳參數。最後將選定的試片放入氣體污染物測試箱之中，以380-385 nm、427-432 nm、460-465 nm的LED燈板照光之下進行九小時的甲醛(formaldehyde)光催化降解性能實驗。 研究結果顯示奈米流體摻雜硝酸鋰改質後其特性會出現改變。在MB實驗中可得知以LiNO3濃度在0.02M 對MB光降解效果最佳，降解率達34%。在電泳沉積製程中發現未改質、浸泡硝酸鋰改質與共沈積硝酸鋰改質的最佳製程參數分別為7mA/9min、7mA/9min和5mA/10min。最佳三種製程參數的試片進行甲醛降解實驗發現照光波長確實會影響各試片的光催化性能。摻雜LiNO3的試片在照光波長427-432 nm的降解甲醛效果最好，且兩種添加LiNO3的方式均有明顯的效果。結果顯示光觸媒摻雜LiNO3後能達到可見光光催化且最佳光催化性能的照光波長應在427-432 nm之間。zh_TW
dc.description.abstractIn this study, a method is proposed that using electrophoretic deposition (EPD) to fabricate the titania (TiO2) photocatalyst on stainless steel substrate, and successfully modifying TiO2 photocatalyst by lithium nitrate (LiNO3) to be visible light-responsive to effectively degrade contaminants. Firstly, the two-step synthesis method was used to produce TiO2/water nanofluid with alginates as a dispersant to enhance suspension performance and reduced bubble problem from electrolysis of water. The characteristics measurement of TiO2/water nanofluid and methylene blue (MB) photocatalytic degradation experiments were carried out. Then, we used the constant current electrophoretic deposition method with a stainless steel substrate for the electrode, the TiO2 deposited on positive electrode to form the TiO2 coated specimens. We check the uniformity and cracks of coating surface on the completed specimens to determine the optimal parameters of EPD process by a optical microscope (OM) and scanning electron microscope (SEM). Finally, the selected specimen was put into the test box of gaseous pollutants to conduct the photocatalytic degradation of formaldehyde experiments for nine hours under radiation of the LED light board with wavelength of 380-385 nm, 427-432 nm, and 460-465 nm separately. The results showed that the properties of TiO2/water nanofluid were changed after doping LiNO3. MB experiments could be observed the TiO2/water nanofluid with LiNO3 of 0.02M had best result of photocatalytic degradation, and the degradation rate could reach to 34%. In the EPD process, the optimum process parameters of unmodified, modified by soaking LiNO3, and modified by codeposition of LiNO3 were 7mA/9min, 7mA/9min, and 5mA/10min, respectively. The degradation of formaldehyde experiment using specimen with best process parameters was found the wavelength of irradiation did affect the photocatalytic properties of the specimen. The LiNO3 doped specimen had best degradation of formaldehyde at 427-432 nm of irradiation wavelength, and two kinds of ways to dope LiNO3 had a significant effect. The results showed that after LiNO3 doped could achieve photocatalytic degradation under visible light and the optimum photocatalytic performance should be according to the wavelength of irradiation between 427-432 nm.en_US
dc.description.sponsorship機電工程學系zh_TW
dc.identifierGN060073034H
dc.identifier.urihttp://etds.lib.ntnu.edu.tw/cgi-bin/gs32/gsweb.cgi?o=dstdcdr&s=id=%22GN060073034H%22.&%22.id.&
dc.identifier.urihttp://rportal.lib.ntnu.edu.tw:80/handle/20.500.12235/97112
dc.language中文
dc.subject光觸媒zh_TW
dc.subject二氧化鈦zh_TW
dc.subject甲基藍zh_TW
dc.subject甲醛zh_TW
dc.subjectphotocatalysten_US
dc.subjectTiO2en_US
dc.subjectmethylene blueen_US
dc.subjectformaldehydeen_US
dc.title奈米二氧化鈦溶液摻雜硝酸鋰進行在可見光下光觸媒降解汙染物之研究zh_TW
dc.titleStudy on photocatalytic degradation of pollutants under visible lighting by using TiO2/water nanofluid doped with LiNO3en_US

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