本文關(guān)鍵詞： 催化發(fā)光 氣體傳感器 稀土配合物 揮發(fā)性有機(jī)物　出處：《延安大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：催化發(fā)光(Cataluminescence,CTL)技術(shù)近些年來發(fā)展迅速,尤其是在VOCs氣體檢測方面,依靠催化發(fā)光原理設(shè)計(jì)的氣體傳感器在環(huán)境安全、排放監(jiān)察、醫(yī)療健康等方面發(fā)揮了巨大作用。與體積龐大、操作復(fù)雜的大型氣體檢測儀器相比,催化發(fā)光氣體傳感器具有操作簡便、高效快速、易于小型化等優(yōu)點(diǎn),對實(shí)現(xiàn)氣體實(shí)時(shí)在線監(jiān)測上展現(xiàn)出明顯的優(yōu)勢。對低溫、經(jīng)濟(jì)、高效的催化發(fā)光敏感材料的研究和開發(fā)是近年來催化發(fā)光傳感器的研究熱點(diǎn),多種類型的材料已被應(yīng)用于此,其中稀土類材料表現(xiàn)出優(yōu)異的發(fā)光性能。而同樣擁有優(yōu)秀發(fā)光性能的稀土配合物在催化發(fā)光領(lǐng)域的應(yīng)用卻未見報(bào)道,因此本文便選用了稀土配合物作為傳感器的敏感材料,系統(tǒng)的研究了其催化發(fā)光行為并設(shè)計(jì)了四種類型的催化發(fā)光氣體傳感器。拓展敏感材料類型,為催化發(fā)光氣體傳感器的發(fā)展和應(yīng)用提供新思路。主要內(nèi)容包括:1.在研究過程中發(fā)現(xiàn)正丙醇在硼酸鏑材料表面有強(qiáng)烈的發(fā)光現(xiàn)象,設(shè)計(jì)了以硼酸鏑為傳感材料檢測正丙醇的傳感器。該傳感器在波長為535 nm、溫度為150℃、載氣流速為200 mL/min時(shí),測定正丙醇質(zhì)量濃度工作曲線的線性范圍為40~1800 mg/m3(R=0.9955),檢出限為15 mg/m3。選擇了13種干擾氣體進(jìn)行選擇性測試,除二氯化碳、乙醇、正丁醇分別有4%、9%、5%左右的干擾外,其他氣體并無干擾。連續(xù)通入45個(gè)小時(shí)300 mg/m3的正丙醇,發(fā)光強(qiáng)度無明顯變化,說明該傳感器具有良好的使用壽命。2.研究了環(huán)氧氯丙烷在層狀納米材料硼酸釔上的催化發(fā)光響應(yīng)情況,提出了檢測空氣中環(huán)氧氯丙烷的新方法。該方法具有較好的選擇性和較低的工作溫度,對低濃度的環(huán)氧氯丙烷響應(yīng)十分迅速,僅需1秒左右便達(dá)到峰值。在最優(yōu)實(shí)驗(yàn)條件下,該傳感器的線性范圍為10~800 mg/m3,檢出限為2.9 mg/m3�；厥章蕼y試在101%~104%之間,說明該方法可用于環(huán)氧氯丙烷的實(shí)時(shí)監(jiān)測。3.研究了VOCS在草酸鈰上的化學(xué)發(fā)光行為,研究過程中發(fā)現(xiàn)丙酮通過草酸鈰表面時(shí)有強(qiáng)烈的化學(xué)發(fā)光信號(hào),據(jù)此設(shè)計(jì)了基于草酸鈰催化發(fā)光法檢測丙酮的氣體傳感器,相比于之前報(bào)道的丙酮的催化發(fā)光傳感器,具有敏感材料經(jīng)濟(jì)簡單、工作溫度低的特點(diǎn)�？疾炝�9種可能與丙酮共存的VOCs(可與丙酮互溶的醇類、脂類、酮類、烴以及鹵代烴等)對該傳感器的干擾情況,除了乙醚和丙醛干擾較大外,其余氣體均無干擾。4.實(shí)驗(yàn)發(fā)現(xiàn)乙醚在檸檬酸鈰表面會(huì)產(chǎn)生強(qiáng)烈的化學(xué)發(fā)光現(xiàn)象,在考察了溫度、波長、流速對其發(fā)光信號(hào)的影響后設(shè)計(jì)了乙醚催化發(fā)光氣體傳感器。該傳感器具有較低的工作溫度,可用于實(shí)際樣品的檢測。
[Abstract]:In recent years, the catalytic luminescence technology has developed rapidly, especially in the field of VOCs gas detection. The gas sensors based on the principle of catalytic luminescence have played a great role in environmental safety, emission monitoring, medical health and so on. Compared with large gas detection instrument with complex operation, catalytic luminous gas sensor has the advantages of simple operation, high efficiency and fast speed, easy miniaturization and so on. In recent years, the research and development of highly efficient catalytic luminescent sensitive materials has been a hot topic in the field of catalytic luminescence sensors, and many kinds of materials have been applied in this field. Rare earth materials exhibit excellent luminescence properties, but the applications of rare earth complexes with excellent luminescence properties in the field of catalytic luminescence have not been reported. Therefore, rare earth complexes have been selected as sensitive materials for sensors in this paper. The catalytic luminescence behavior was systematically studied and four types of catalytic luminescence gas sensors were designed. It provides a new idea for the development and application of catalytic luminescent gas sensors. The main contents include: 1. In the research process, it was found that there is a strong luminescence phenomenon of n-propanol on the surface of dysprosium borate. A sensor for detecting n-propanol using dysprosium borate as the sensing material is designed. The sensor has a wavelength of 535 nm, a temperature of 150 鈩，

本文編號(hào)：1511478