本文選題：微生物燃料電池 + 溶解氧　； 參考：《重慶理工大學(xué)》2017年碩士論文

【摘要】：微生物燃料電池是一種新型清潔的能源裝置,它在產(chǎn)電的同時(shí)還能對(duì)廢水進(jìn)行處理,近年來(lái)成為相關(guān)領(lǐng)域研究的熱點(diǎn)。雖然微生物燃料電池具有諸多優(yōu)點(diǎn),但微生物燃料電池的產(chǎn)電功率低,影響微生物燃料電池產(chǎn)電性能最主要的非生物因素有溫度、p H值、溶解氧濃度以及底物濃度等。因此,準(zhǔn)確、在線地監(jiān)測(cè)影響微生物燃料電池產(chǎn)電性能的非生物參數(shù),對(duì)于優(yōu)化控制微生物燃料電池產(chǎn)電性能尤為重要。目前關(guān)于溶解氧濃度檢測(cè)的方法法存在費(fèi)時(shí)、費(fèi)力、耗氧、實(shí)時(shí)測(cè)定困難和受溫度影響等缺點(diǎn),無(wú)法有效地運(yùn)用于微生物燃料電池內(nèi)溶解氧濃度的測(cè)量。因此,探索一種新型的用于微生物燃料電池內(nèi)溶解氧濃度準(zhǔn)確在線測(cè)量的方法就顯得尤為重要。本文采用長(zhǎng)周期光纖光柵(LPFG)和布拉格光纖光柵(FBG)相耦合的方式來(lái)實(shí)現(xiàn)對(duì)微生物燃料電池內(nèi)溶解氧濃度的準(zhǔn)確測(cè)量,其中FBG主要響應(yīng)電池內(nèi)溫度變化信息,LPFG主要響應(yīng)電池內(nèi)部溫度和溶解氧濃度進(jìn)變化信息。本文從以下幾個(gè)方面展開(kāi)了研究:(1)對(duì)基于塑料光纖的溶解氧濃度的測(cè)量進(jìn)行了相關(guān)實(shí)驗(yàn)研究,探索光纖表面溶解氧敏感膜的制備方案和條件,來(lái)得到效果最佳的氧傳感器。(2)利用溶膠-凝膠法制備將氧敏感膜固定在光纖上,通過(guò)光纖鍍膜前后的光譜特性變化及鍍膜的熒光光譜的變化趨勢(shì)與鄰啡咯啉釕(Ⅱ)的熒光光譜的變化趨勢(shì)一致,并對(duì)敏感膜進(jìn)行了表征。(3)利用所制作好的傳感器對(duì)不同溶解氧濃度進(jìn)行測(cè)量�；谒芰瞎饫w的氧傳感器,通過(guò)對(duì)熒光強(qiáng)度的測(cè)量來(lái)測(cè)量氧的濃度,靈敏度較高,說(shuō)明敏感膜的性能良好。制出的良好敏感膜性能為基于LPFG的氧傳感器奠定了基礎(chǔ),可以通過(guò)對(duì)中心波長(zhǎng)偏移情況來(lái)測(cè)量溶解氧濃度,擬合系數(shù)R2達(dá)到0.9564。(4)為了提高LPFG溶解氧測(cè)量的準(zhǔn)確度,設(shè)計(jì)并制作了FBG-LPFG組合式光纖氧傳感器來(lái)消除溫度的影響,得出:FBG、LPFG的中心波長(zhǎng)偏移量與溫度之間呈一定的線性關(guān)系,FBG的溫度靈敏度為0.0063nm/℃,LPFG的溫度靈敏度為0.0588nm/℃;測(cè)量濃度時(shí),LPFG的中心波長(zhǎng)發(fā)生偏移,LPFG的折射率靈敏度為-56.66nm/RIU,FBG的中心波長(zhǎng)沒(méi)有發(fā)生偏移。說(shuō)明FBG-LPFG組合式光纖氧傳感器可以同時(shí)測(cè)量濃度和溫度。(5)把FBG-LPFG組合式光纖氧傳感器放在MFC中測(cè)量微生物燃料電池溶解氧濃度的變化,測(cè)得當(dāng)溶解氧濃度為0.24mg/L時(shí),輸出功率最大。本文設(shè)計(jì)的兩種測(cè)量溶解氧濃度的方法都能有效的對(duì)其測(cè)量,但是用塑料光纖測(cè)量時(shí),是在溫度恒定的情況下進(jìn)行測(cè)量的。由于微生物燃料電池的溫度受到微生物的新陳代謝、內(nèi)阻的影響,溫度時(shí)時(shí)變化,在微生物燃料電池的使用中具有一定的局限性,不過(guò)本文中塑料光纖傳感器是為了探究了敏感膜的制備最優(yōu)方法及條件,同時(shí)為L(zhǎng)PFG傳感器做了前期的準(zhǔn)備,本文制作的消除溫度影響的氧傳感器對(duì)今后的溶解氧傳感器的研究具有一定的意義。
[Abstract]:Microbial fuel cell is a new type of clean energy device. It can also treat wastewater while generating electricity. In recent years, microbial fuel cell has become a research hotspot in related fields. Although the microbial fuel cell has many advantages, the electric power of the microbial fuel cell is low. The main abiotic factors affecting the electrical performance of the microbial fuel cell are temperature pH value, dissolved oxygen concentration and substrate concentration. Therefore, it is very important to monitor the non-biological parameters that affect the electrical performance of microbial fuel cells on line, so it is very important to optimize the performance of microbial fuel cells. At present, the methods of dissolved oxygen concentration measurement are time-consuming, laborious, oxygen consuming, difficult to determine in real time and affected by temperature, and can not be effectively used in the measurement of dissolved oxygen concentration in microbial fuel cells. Therefore, it is very important to explore a new method for accurate on-line measurement of dissolved oxygen concentration in microbial fuel cells. In this paper, the long period fiber grating (LPFG) and the fiber Bragg grating (FBG) are coupled to realize the accurate measurement of dissolved oxygen concentration in microbial fuel cells. FBG mainly responds to the variation information of temperature and dissolved oxygen concentration inside the cell. In this paper, the following aspects of the study: 1) the measurement of dissolved oxygen concentration based on plastic fiber has been studied, and the preparation scheme and conditions of the dissolved oxygen sensitive film on the surface of optical fiber have been explored. To obtain the most effective oxygen sensor. 2) the oxygen sensitive film was prepared by sol-gel method and immobilized on the optical fiber. The change trend of fluorescence spectrum before and after optical fiber coating is the same as that of o-Phenanthroline ruthenium (鈪，

本文編號(hào)：1794559