本文選題：二氧化硅 + 金納米顆粒��； 參考：《東南大學(xué)》2016年碩士論文

【摘要】：近十幾年來,隨著環(huán)境污染日益嚴(yán)重及人們需求的日益增加,越來越多來源廣泛且節(jié)能環(huán)保型材料引起了科學(xué)家們的廣泛關(guān)注,其中二氧化硅材料憑借著來源廣泛、價(jià)格低廉、安全無毒等優(yōu)勢吸引了人們的眼球,將其制作成介孔或中空介孔結(jié)構(gòu)更是能夠大大提高材料本身的比表面積和孔體積,極大的增加了其吸附能力。由于該材料表面有大量硅羥基存在,可以對(duì)其表面進(jìn)行修飾,增加材料本身的生物相容性,因此介孔或中空介孔二氧化硅材料集以上所有優(yōu)點(diǎn)和特性于一身,能夠廣泛應(yīng)用于催化、醫(yī)療、環(huán)境保護(hù)等領(lǐng)域。在本論文中,我們制備了多種不同結(jié)構(gòu)類型的中空介孔二氧化硅納米材料,并對(duì)其性能進(jìn)行了表征,具體工作如下：第一章：簡述了介孔二氧化硅納米顆粒(MSNs)及中空介孔二氧化硅納米顆粒(HMSNs)的制備方法、影響因素及應(yīng)用。第二章：我們利用軟模板法,以硅酸四乙酯(TEOS)和3-氨丙基三乙氧基硅烷(APTES)為硅源,通過溶膠-凝膠過程及選擇性刻蝕技術(shù)制備了單層中空介孔二氧化硅納米顆粒(SHMSNs),然后以制得的SHMSNs為初始模板進(jìn)一步制得了雙層中空介孔二氧化硅納米顆粒(DHMSNs)。在制備過程中,我們研究了各種因素對(duì)產(chǎn)物形貌結(jié)構(gòu)的影響,如催化劑、刻蝕劑、反應(yīng)溫度及刻蝕時(shí)間等,并對(duì)制得的產(chǎn)物的性能進(jìn)行了表征,經(jīng)表征證明,SHMSNs和DHMSNs均具有結(jié)構(gòu)良好的單層及雙層中空介孔結(jié)構(gòu),且擁有大的比表面積(SHMSNs為103.4m2g-1,DHMSNs為152.3 m2 g-1),在載藥釋藥實(shí)驗(yàn)中也表現(xiàn)出了令人滿意的載藥量及緩釋特性。第三章：我們制備了二氧化硅包覆金核的多功能型復(fù)合材料,首先根據(jù)文獻(xiàn)報(bào)道的方法(有所改動(dòng))制得單分散的包金介孔二氧化硅納米顆粒(Au@mSiO2),在此基礎(chǔ)上,通過層疊法和選擇性刻蝕技術(shù)進(jìn)一步制備了核-殼包金中空介孔二氧化硅納米顆粒(Au@mSiO2@hollow mSiO2).同樣,我們研究了金前體(HAuCl4)用量對(duì)金納米核的影響,并對(duì)制得的產(chǎn)物的性能進(jìn)行了相關(guān)表征,經(jīng)表征證明,Au@mSiO2和Au@mSiO2@hollow mSiO2均具有各自良好的包金介孔及包金中空介孔結(jié)構(gòu),Au@mSiO2@hollow mSiO2更是擁有大的比表面積(270 m2g-1),且表現(xiàn)出了高的熱穩(wěn)定性能。
[Abstract]:In the past ten years, with the increasing of environmental pollution and people's demand, more and more materials of energy saving and environmental protection have attracted the attention of scientists. Among them, silicon dioxide materials have a wide range of sources and low price. The advantages of safety and non-toxicity attract people's attention. Making them into mesoporous or hollow mesoporous structures can greatly improve the specific surface area and pore volume of the material and greatly increase its adsorption capacity. Due to the presence of a large number of hydroxyl groups on the surface of the material, it can be modified to increase the biocompatibility of the material itself. Therefore, the mesoporous or hollow mesoporous silica material has all the above advantages and characteristics. Can be widely used in catalysis, medical treatment, environmental protection and other fields. In this thesis, we prepared a variety of hollow mesoporous silica nanomaterials with different structures and characterized their properties. The main work is as follows: in Chapter 1, the preparation methods, influencing factors and applications of mesoporous silica nanoparticles (MSNs) and hollow mesoporous silica nanoparticles (HMSNs) are briefly described. Chapter 2: we used tetraethyl silicate (TEOS) and 3-aminopropyl triethoxysilane (APTES) as silicon source by soft template method. The monolayer hollow mesoporous silica nanoparticles were prepared by sol-gel process and selective etching technique, and then the double-layer hollow mesoporous silica nanoparticles were further prepared by using the SHMSNs prepared as the initial template. In the process of preparation, we studied the influence of various factors on the morphology and structure of the product, such as catalyst, etchant, reaction temperature and etching time, and characterized the properties of the prepared products. It is proved that both SHMSNs and DHMSNs have good monolayer and double-layer hollow mesoporous structures, and have a large specific surface area of 103.4m2g-1DHMSNs of 152.3 m2g-1ns, showing satisfactory drug loading and slow-release properties. Chapter 3: we have prepared the multifunctional composite materials of silica coated with gold nuclei. Firstly, we prepared monodisperse gold coated mesoporous silica nanoparticles AumSiO2 based on the methods reported in the literature. The core-shell gold hollow mesoporous silica nanoparticles were further prepared by stacking and selective etching techniques. Similarly, the effect of the amount of gold precursor HAuCl _ 4 on the gold nanocrystalline was studied, and the properties of the prepared products were characterized. It has been proved that both Au@ mSiO _ 2 and Au@mSiO2@hollow mSiO2 have good mesoporous and hollow mesoporous structure AumSiO _ 2 mSiO2 with large specific surface area of 270m2g-1g ~ (-1), and exhibit high thermal stability.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TQ127.2;TB383

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