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)還能對廢水進(jìn)行處理,近年來成為相關(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)測影響微生物燃料電池產(chǎn)電性能的非生物參數(shù),對于優(yōu)化控制微生物燃料電池產(chǎn)電性能尤為重要。目前關(guān)于溶解氧濃度檢測的方法法存在費(fèi)時(shí)、費(fèi)力、耗氧、實(shí)時(shí)測定困難和受溫度影響等缺點(diǎn),無法有效地運(yùn)用于微生物燃料電池內(nèi)溶解氧濃度的測量。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)確在線測量的方法就顯得尤為重要。本文采用長周期光纖光柵(LPFG)和布拉格光纖光柵(FBG)相耦合的方式來實(shí)現(xiàn)對微生物燃料電池內(nèi)溶解氧濃度的準(zhǔn)確測量,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)方面展開了研究:(1)對基于塑料光纖的溶解氧濃度的測量進(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與鄰啡咯啉釕(Ⅱ)的熒光光譜的變化趨勢一致,并對敏感膜進(jìn)行了表征。(3)利用所制作好的傳感器對不同溶解氧濃度進(jìn)行測量�；谒芰瞎饫w的氧傳感器,通過對熒光強(qiáng)度的測量來測量氧的濃度,靈敏度較高,說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),可以通過對中心波長偏移情況來測量溶解氧濃度,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消除溫度的影響,得出:FBG、LPFG的中心波長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/℃;測量濃度時(shí),LPFG的中心波長發(fā)生偏移,LPFG的折射率靈敏度為-56.66nm/RIU,FBG的中心波長沒有發(fā)生偏移。說明FBG-LPFG組合式光纖氧傳感器可以同時(shí)測量濃度和溫度。(5)把FBG-LPFG組合式光纖氧傳感器放在MFC中測量微生物燃料電池溶解氧濃度的變化,測得當(dāng)溶解氧濃度為0.24mg/L時(shí),輸出功率最大。本文設(shè)計(jì)的兩種測量溶解氧濃度的方法都能有效的對其測量,但是用塑料光纖測量時(shí),是在溫度恒定的情況下進(jìn)行測量的。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LPFG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