本文關(guān)鍵詞：三種含能材料納米比色分析方法的構(gòu)建及應(yīng)用研究　出處：《西南科技大學》2017年碩士論文　論文類型：學位論文

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【摘要】：在含能材料的制備及使用過程中,會產(chǎn)生許多對環(huán)境、人體有害的物質(zhì)。因此,開展含能材料的檢測工作具有十分重要的意義。納米比色分析方法充分利用了納米材料的光學及電學特性,具有步驟簡易、耗時短、現(xiàn)場檢測方便等優(yōu)勢,是發(fā)展新型含能材料傳感器的一個重要方向。本文基于納米比色分析方法的優(yōu)異性,開展了以下工作:(1)液相還原硝酸銀制備三聚氰酸三鈉修飾的黃色銀納米(Cya-Ag NPs)膠體溶液。Cya-Ag NPs具有良好的表面等離子(SPR)效應(yīng),SPR特征吸收位于418 nm。加入親核物質(zhì)水合肼(N_2H_4)后,Cya-Ag NPs發(fā)生氧化溶解,SPR吸收發(fā)生明顯變化,同時溶液顏色變淡�；诖�,構(gòu)建了一個高選擇性在水溶液中檢測N_2H_4的比色方法,并對檢測機理進行詳細研究。該方法的線性范圍為0.01 40μmol·L~(-1),相關(guān)系數(shù)為0.993,儀器檢出限為0.01μmol·L~(-1),裸眼檢出限為10μmol·L~(-1)。在實際水樣中具有較好的重現(xiàn)性及準確度。(2)液相超聲剝離制備層狀半胱氨酸保護的二硫化鉬納米片(Cys-MoS_2NSs),并進行了結(jié)構(gòu)表征。Cys-MoS_2 NSs具有良好的人工模擬酶活性,能加速過氧化氫(H_2O_2)的分解。基于此,以3,3,5,5-四甲基聯(lián)苯胺(TMB)為底物,構(gòu)建了一個在水溶液比色檢測H_2O_2的簡易方法。該方法線性范圍為0 40μmol·L~(-1),相關(guān)系數(shù)為0.995,儀器檢出限為0.01μmol·L~(-1),裸眼檢出限為16μmol·L~(-1)。在實際水樣中具有較好重現(xiàn)性及準確度。(3)2,4,6-三硝基甲苯(TNT)具有缺電性,能與TMB形成Meisenheimer復合物�；贑ys-MoS_2 NSs類過氧化氫酶活性,以TMB為底物,建立了一個全新的在水溶液中檢測TNT的比色方法,并對檢測機理進行詳細研究。該方法線性范圍為0 50μmol·L~(-1),相關(guān)系數(shù)為0.994,儀器檢出限為0.01μmol·L~(-1),裸眼檢出限為2.5μmol·L~(-1)。在實際水樣中具有較好重現(xiàn)性及準確度。
[Abstract]:In the process of preparation and use of energetic materials, many substances which are harmful to the environment and the human body will be produced. Therefore, it is of great significance to carry out the testing of energetic materials. Nano colorimetric analysis makes full use of the optical and electrical properties of nanomaterials. It has the advantages of simple steps, short time consumption and convenient on-site detection. It is an important direction for developing new sensors for energetic materials. Based on the excellence of nano colorimetric analysis, the following works were carried out as follows: (1) liquid phase reduction of silver nitrate to prepare yellow silver nano (Cya-Ag NPs) colloidal solution modified with sodium cyanuric acid (three nm). Cya-Ag NPs has a good surface plasma (SPR) effect, and the absorption of SPR is located at 418 nm. After adding nucleophilic substance hydrazine (N_2H_4), Cya-Ag NPs is oxidized and dissolved, and the absorption of SPR changes obviously, and the color of the solution becomes light. Based on this, a high selective colorimetric method for detecting N_2H_4 in aqueous solution was constructed, and the detection mechanism was studied in detail. The linear range of the method is 0.0140 Mu mol. L~ (-1), the correlation coefficient is 0.993, the detection limit of the instrument is 0.01 Mu mol. L~ (-1), and the naked eye detection limit is 10 mu mol. L~ (-1). It has good reproducibility and accuracy in the actual water sample. (2) the molybdenum disulfide nanoscale (Cys-MoS_2NSs) protected by layered cysteine was prepared by liquid phase ultrasonic stripping, and the structure was characterized. Cys-MoS_2 NSs has good artificial mimic enzyme activity, which can accelerate the decomposition of hydrogen peroxide (H_2O_2). Based on this, a simple method for detecting H_2O_2 in aqueous solution with 3,3,5,5- four methyl diphenyl amine (TMB) as substrate was constructed. The linear range of the method is 040 Mu mol. L~ (-1), the correlation coefficient is 0.995, the detection limit of the instrument is 0.01 Mu mol. L~ (-1), and the naked eye detection limit is 16 Mu mol. L~ (-1). It has good reproducibility and accuracy in the actual water sample. (3) 2,4,6- three nitrotoluene (TNT) has the property of electricity deficiency and can form Meisenheimer complex with TMB. Based on the activity of Cys-MoS_2 NSs catalase and TMB as substrate, a new colorimetric method for detecting TNT in aqueous solution was established, and the detection mechanism was studied in detail. The linear range of the method is 050 Mu mol. L~ (-1), the correlation coefficient is 0.994, the detection limit of the instrument is 0.01 Mu mol. L~ (-1), and the naked eye detection limit is 2.5 Mu mol. L~ (-1). It has good reproducibility and accuracy in the actual water sample.
【學位授予單位】：西南科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：O657.3

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