本文選題：CuO/MnO_2　切入點：Cu_2O　出處：《合肥工業(yè)大學》2015年碩士論文

【摘要】：鑒于納米結構陣列材料相比于無序堆積的納米粉體材料具有比表面積高、活性位點多、電荷傳輸能力強的特性,作為催化劑和鋰離子電池電極材料均可表現(xiàn)更加優(yōu)異的性能。本文設計實驗方案,以生長在銅箔上的Cu(OH)2納米棒陣列為模板,分別采用化學浸漬法、液相還原法和金屬基底誘導熱還原法制備了CuO/MnO2、CuO/Cu2O復合納米棒結構陣列和Cu20納米棒結構陣列,并分別研究了它們在催化降解染料廢水和鋰離子電池中的應用,主要研究內容總結如下：1.以生長在銅箔上的Cu(OH)2納米棒陣列為模板,Mn(NO3)2溶液為錳源,通過化學浸漬法和后期焙燒制備CuO/MnO2納米結構陣列,并將其作為催化劑催化H2O2氧化降解酸性品紅(AF)溶液,研究AF溶液初始濃度、H202用量對催化性能的影響,結果發(fā)現(xiàn)當AF濃度為20mg/L,H2O2用量為0.05 mL時,CuO/MnO2催化劑的催化性能最佳；同時制備CuO納米棒陣列催化劑和粉末狀MnO2納米棒催化劑,比較相同條件下三種催化劑對AF溶液的催化降解性能,其降解率分別為：94.05%、72.5%、79.6%,說明CuO/MnO2納米棒陣列催化劑對催化H2O2氧化降解AF染料效果最為優(yōu)異；探究CuO/MnO2納米棒陣列催化劑的穩(wěn)定性和循環(huán)使用性能,結果顯示同一片CuO/MnO2催化劑經(jīng)過10次重復利用后,AF溶液的降解率沒有明顯的變化(首次：94.05%,第10次：90.28%),并且CuO/MnO2催化劑在放大約6倍的染料體系中仍然具有較好的催化性能,說明CuO/Mn02納米棒陣列催化劑具有良好的應用前景。2.以生長在銅箔上的Cu(OH)2納米棒陣列為模板,抗壞血酸和NaBH4為還原劑,分別在30℃水浴加熱和0-5℃低溫條件下,通過“液相還原”和后期熱處理得到CuO/Cu2O復合納米棒結構陣列；并將其作為光催化劑,研究其在可見光條件下對剛果紅溶液(CR)的光催化降解性能。結果發(fā)現(xiàn)當CR濃度為30 ppm時,CuO/Cu2O催化劑對剛果紅溶液的光催化降解率可達93.81%;同時制備CuO納米棒陣列催化劑和Cu20納米球薄膜催化劑,比較相同條件下三種催化劑對CR溶液的可見光催化降解性能,其降解率分別為：93.81%、64.28%、48.29%,說明將Cu20負載到具有納米棒陣列結構的CuO表面可顯著提高其對CR溶液的可見光催化降解性能。3.以生長在銅箔上的Cu(OH)2納米棒陣列為模板,通過金屬基底誘導熱還原法制備Cu20納米棒結構陣列,并將其作為鋰離子電池負極材料,研究其充放電性能、循環(huán)性能及倍率性能,結果表明：Cu20納米棒結構陣列薄膜具有很好的循環(huán)性能和倍率性能,在1.0 C下經(jīng)過200次循環(huán)后放電比容量為358 mAhg-1,在10C下其放電比容量仍然有315 mAh g-1;電化學交流阻抗譜的測試發(fā)現(xiàn)Cu20納米棒結構陣列的電荷遷移電阻僅為59.2Ω,說明Cu20納米棒結構陣列薄膜具有更高的電子傳輸能力；同時,設置對比實驗研究Cu20納米棒結構陣列的形成機理,結果發(fā)現(xiàn)單質Cu的引入改變了反應吉布斯自由能變從而顯著降低了Cu(OH)2到Cu20的相轉變溫度。
[Abstract]:In view of the fact that nanostructured array materials have higher specific surface area, more active sites and stronger charge transport ability than those of disordered stacked nano-powder materials, As catalysts and electrode materials for lithium ion batteries, the experimental scheme was designed. The Cu(OH)2 nanorod arrays grown on copper foil were used as templates, respectively, by chemical impregnation. Cuo / MnO2CuO / CuO / CuO / CuO / Cu2O nanorod arrays and Cu20 nanorods arrays were prepared by liquid phase reduction and metal substrate induced thermal reduction. Their applications in catalytic degradation of dye wastewater and lithium ion batteries were studied. The main research contents are summarized as follows: 1. The Cu(OH)2 nanorod arrays grown on copper foil were used as template and manganese source. CuO/MnO2 nanostructures were prepared by chemical impregnation and later calcination. The effect of the initial concentration of AF solution on the catalytic performance was studied. The results showed that the best catalytic performance was obtained when the concentration of AF was 20mg / L H _ 2O _ 2 and the dosage of H _ 2O _ 2 was 0.05ml. CuO nanorods array catalysts and powdered MnO2 nanorods catalysts were prepared at the same time. The catalytic degradation properties of three kinds of catalysts for AF solution were compared under the same conditions. The degradation rates of CuO/MnO2 nanorods were 72.5% and 79.6% respectively, which showed that the CuO/MnO2 nanorod array catalyst was the most effective catalyst for the oxidation and degradation of AF dyes by H2O2, and the stability and recycling performance of CuO/MnO2 nanorod array catalysts were investigated. The results showed that there was no significant change in the degradation rate of the same CuO/MnO2 catalyst after 10 reuses (the first time was 94.05, the tenth was 90.280.28%), and the CuO/MnO2 catalyst still had good catalytic performance in the dye system of about 6 times magnification. The results show that the CuO/Mn02 nanorod array catalyst has a good application prospect. (2) the Cu(OH)2 nanorod array grown on copper foil is used as template, ascorbic acid and NaBH4 are used as reducing agents, and heated in water bath at 30 鈩，

本文編號：1694677