本文關(guān)鍵詞：長(zhǎng)周期光纖光柵鐵離子濃度傳感器的制備及其在MFC中的應(yīng)用研究　出處：《重慶理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 微生物燃料電池 光纖傳感器 靜電層層自組裝技術(shù) 長(zhǎng)周期光纖光柵 溫度補(bǔ)償

【摘要】：微生物燃料電池(MFC)是微生物將有機(jī)物中的化學(xué)能轉(zhuǎn)換為電能的裝置,也是解決環(huán)境污染、開(kāi)發(fā)新型清潔能源的新技術(shù)。它在產(chǎn)電的同時(shí)還能用于廢水處理、去除硫化氫、產(chǎn)氫和地下水修復(fù)等。與傳統(tǒng)的廢水處理工藝相比,MFC產(chǎn)泥量少、無(wú)甲烷產(chǎn)生,但產(chǎn)電功率密度低,影響MFC的發(fā)展,通常還比氫氧燃料電池少3-4個(gè)數(shù)量等級(jí)。為提高M(jìn)FC的產(chǎn)電功率和廢水處理及降低成本,本文系統(tǒng)地研究分析了MFC內(nèi)參與生化反應(yīng)過(guò)程的電極臨近區(qū)域Fe3+的實(shí)時(shí)監(jiān)測(cè)技術(shù)。光纖傳感技術(shù)是以光纖光柵作為傳感單元的新型傳感器,本文采用靜電層層自組裝技術(shù)對(duì)LPFG的傳感部位自組裝高分子聚合物[]20/PAAPDDA敏感膜代替光纖包層,并在敏感膜中加入鐵離子指示劑磺基水楊酸,通過(guò)分析敏感膜的厚度,指示劑的含量對(duì)傳輸光譜及傳輸光強(qiáng)的影響。響應(yīng)測(cè)試了MFC陽(yáng)極室內(nèi)的Fe3+濃度,實(shí)驗(yàn)發(fā)現(xiàn):(1)用光譜儀測(cè)試修飾了敏感膜的光纖傳感器的傳輸光譜,發(fā)現(xiàn)光譜傳輸能力增強(qiáng),且傳感器吸收峰的最大吸光度與光纖表面的鍍膜層數(shù)呈線性減弱關(guān)系,證實(shí)了鍍膜過(guò)程分子是逐層交替沉積的。(2)用電鏡掃描儀器對(duì)鍍了[]20/PAAPDDA膜后的光纖表面進(jìn)行微觀觀察,發(fā)現(xiàn)其外觀形貌完整、表面均勻。可以用來(lái)作為Fe3+指示劑的載體。(3)添加了0.5%的磺基水楊酸指示劑后對(duì)不同濃度的鐵離子溶液的光強(qiáng)變化基本呈線性關(guān)系。即該自組裝敏感膜對(duì)液相狀態(tài)下的鐵離子具有較好的光學(xué)響應(yīng)能力,能夠作為實(shí)時(shí)監(jiān)測(cè)MFC陽(yáng)極界面基質(zhì)不同組分的化合物含量變化的傳感器。(4)用EDTA測(cè)試了光纖傳感器的可重復(fù)使用性,發(fā)現(xiàn)加入脫附鐵離子的EDTA后紅移了2.54nm的光譜會(huì)再藍(lán)移2.5nm回到原來(lái)的中心波長(zhǎng),說(shuō)明光纖傳感器與液相狀態(tài)下的Fe3+反應(yīng)形成了穩(wěn)定的水溶性絡(luò)合物,因此,此傳LPFG-FBG感器能夠重復(fù)多次使用。模擬MFC產(chǎn)電過(guò)程發(fā)生的生物化學(xué)反應(yīng)使反應(yīng)室內(nèi)的溫度和離子濃度發(fā)生改變,影響產(chǎn)電功率的同時(shí)也影響傳感器檢測(cè)的準(zhǔn)確性。因此為了消除在測(cè)量過(guò)程中的溫度交叉敏感,本文對(duì)消除溫度的交叉敏感做了分析,將級(jí)聯(lián)式的LPFG-FBG光纖光柵傳感器用于同時(shí)測(cè)量溫度和傳感器外部環(huán)境介質(zhì)的折射率。分別對(duì)FBG和LPFG的溫度傳感特性與外部環(huán)境折射率作了理論分析,并針對(duì)FBG對(duì)環(huán)境折射率不敏感的特點(diǎn),將FBG與LPFG級(jí)聯(lián),組成對(duì)溫度具有補(bǔ)償功能的新型高敏感傳感器。
[Abstract]:Microbial fuel cell (MFC) is the organic matter in microbial chemical energy into electrical energy device, but also solve the environmental pollution, the development of new technology of new clean energy. It can also be used in wastewater treatment, electric generation and removal of hydrogen sulfide, hydrogen production and groundwater remediation. Compared with the traditional wastewater treatment process. MFC produces less sludge, no methane production, but the power density is low, influence the development of MFC, usually less than a number of 3-4 fuel cell grade. In order to improve the production of MFC electric power and waste water treatment and reduce the cost, this paper systematically analyzes the research of real-time monitoring technology for electrode biochemical reaction process in MFC in the neighborhood of Fe3+. The optical fiber sensing technology is based on optical fiber grating as the sensor unit model, this paper adopts electrostatic layer by layer self assembly technology of LPFG sensor parts of self assembled polymer sensitive 20/PAAPDDA [] The sense of film instead of fiber cladding, and adding iron ion indicator sulfosalicylic acid in sensitive membrane, through the analysis of sensitive film thickness, the effect of indicator content on the transmission spectrum and transmission intensity. In response to the concentration of Fe3+, MFC anode chamber test experiment found that: (1) the spectrum analyzer modified fiber transmission spectrum the sensor sensitive membrane, showed enhanced spectral transmission ability, and the sensor absorption peak maximum absorbance and fiber surface coating layers decreased linearly relationship, confirmed the molecular deposition process is the deposition layer. (2) electric mirror scanning instrument for microscopic observation on the optical fiber surface plating []20/PAAPDDA film after the discovery the appearance of a complete, uniform surface. Can be used as a carrier of Fe3+ indicator. (3) added the sulfosalicylic acid indicator 0.5% after the change of light intensity on the iron ion solution of different concentration was the basic line That is the self assembling. The relation of the sensitive film with iron ions in liquid phase state and good optical response capability, sensor can change compounds content as different groups of real-time monitoring of MFC interface. The anode substrate (4) with the EDTA test of the fiber optic sensor can be used repeatedly, found that adding iron ions desorption the EDTA 2.54nm spectrum will shift back to the blue shift of center wavelength of the original 2.5nm, Fe3+ optical fiber sensor and the liquid phase under the condition of the formation of a stable water soluble complex, therefore, the LPFG-FBG sensor can be used repeatedly. The biological chemical reaction simulation MFC electricity production process occurs so that the temperature of the reaction chamber and the ion concentration changes, while the impact of electric power also affects the accuracy of sensors. In order to eliminate in the process of measurement of temperature cross sensitivity, the elimination of the cross temperature Sensitive analysis has been done, the LPFG-FBG fiber grating sensor cascade for simultaneous measurement of temperature and refractive index sensor external environment medium respectively. The rate of temperature sensing characteristics and the external environment of FBG index and the rate of LPFG is analyzed, and based on the FBG characteristics of the refractive index is not sensitive, FBG and LPFG cascade. The new high sensitive sensor with compensation function of the temperature.

【學(xué)位授予單位】：重慶理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM911.4;TP212

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