本文選題：多孔金 + 生物模板��； 參考：《華中農(nóng)業(yè)大學(xué)》2017年碩士論文

【摘要】：金納米顆粒由于其獨(dú)特的催化性質(zhì),在有機(jī)化學(xué)催化和電化學(xué)催化方面都有著十分廣泛的應(yīng)用。然而金納米顆粒穩(wěn)定性不好,容易團(tuán)聚,而且催化性質(zhì)也有待進(jìn)一步的提高。針對這些問題,本論文基于生物模板法制備了多孔金棒和小顆粒納米金棒,并在此基礎(chǔ)上制備了多孔金棒-二氧化鈦和小顆粒納米金棒-鉑的復(fù)合材料,并在對硝基苯酚還原反應(yīng)和甲醇的電催化氧化反應(yīng)中進(jìn)行了應(yīng)用。具體研究內(nèi)容如下:1.以枯草芽孢桿菌及聚苯乙烯微球?yàn)殡p模板制備了多孔金棒及多孔金-二氧化鈦復(fù)合材料,并進(jìn)行了催化性能的研究:制備了多孔金棒及多孔金-二氧化鈦復(fù)合材料,并研究了材料孔徑大小、組分比例及材料晶型等條件對其催化性能的影響。當(dāng)控制聚苯乙烯微球直徑為110 nm時、二氧化鈦溶膠中鈦酸四丁酯:H_2O為4:1、老化時間為1.5 h、煅燒溫度為450℃、煅燒時間2 h、菌液與溶膠比例為1:2、復(fù)合時間為16 h時,我們可制備孔洞直徑為70 nm、二氧化鈦含量為5.3%,且晶型為銳鈦礦的催化性能最優(yōu)異的多孔金二氧化鈦復(fù)合材料。2.以枯草芽孢桿菌為模板制備小顆粒納米金棒及其金屬鉑復(fù)合材料,并進(jìn)行了催化性能研究:制備了小顆粒納米金棒及其金屬鉑復(fù)合材料,并通過調(diào)整化學(xué)沉積金屬鉑時間,氯鉑酸與加入納米金棒的量,控制了復(fù)合材料中金屬鉑的含量。當(dāng)小顆粒納米金棒-鉑復(fù)合材料沉積的鉑含量為2.2%時,甲醇電催化氧化的效果最好。
[Abstract]:Gold nanoparticles have been widely used in organic chemistry and electrochemical catalysis due to their unique catalytic properties. However, the stability of gold nanoparticles is poor, easy to agglomerate, and the catalytic properties need to be further improved. In order to solve these problems, porous gold rods and nanocrystalline gold rods were prepared based on the biological template method, and composite materials of porous gold rod and titanium dioxide and small particle nanocrystalline gold rod platinum were prepared. It has been applied to the reduction of p-nitrophenol and the electrocatalytic oxidation of methanol. The specific contents of the study are as follows: 1. Porous gold rods and porous gold-titanium dioxide composites were prepared by using Bacillus subtilis and polystyrene microspheres as double templates. The catalytic properties of porous gold rods and porous gold-titanium dioxide composites were studied. The effects of pore size, composition ratio and crystal type on the catalytic performance were studied. When the diameter of polystyrene microspheres is 110 nm, tetrabutyl titanate: H2O is 4: 1, aging time is 1.5 h, calcination temperature is 450 鈩，

本文編號：1798316