本文選題：碳基量子點(diǎn)　切入點(diǎn)：功能化修飾　出處：《北京理工大學(xué)》2016年碩士論文

【摘要】：本文對(duì)碳基量子點(diǎn)進(jìn)行功能化修飾和有序組裝,設(shè)計(jì)并制備新型的碳基功能材料。發(fā)展了水熱法和電化學(xué)法兩種方法制備石墨烯量子點(diǎn)。由于所制備的石墨烯量子點(diǎn)表面富含含氧官能團(tuán),不僅賦予石墨烯量子點(diǎn)良好的水溶性,使量子點(diǎn)表面帶有電荷,而且提供了與各種無(wú)機(jī)物、有機(jī)物、聚合物或生物物種之間進(jìn)行功能化反應(yīng)的可能,為組裝具有功能結(jié)構(gòu)的材料提供了更廣闊的平臺(tái)。一方面,我們通過(guò)一步水熱處理法,使石墨烯量子點(diǎn)自發(fā)還原并自組裝修飾在類(lèi)石墨相氮化碳納米片上,形成獨(dú)特的納米復(fù)合物,作為一種新型的非金屬催化劑,其在氧化還原反應(yīng)中表現(xiàn)出顯著增強(qiáng)的催化活性,且催化性能遠(yuǎn)遠(yuǎn)高于其單一的石墨烯量子點(diǎn)和類(lèi)石墨相氮化碳材料,甚至可以與一些石墨烯基材料相比。本工作所研究的納米復(fù)合物為制備新型基于類(lèi)石墨相氮化碳的納米結(jié)構(gòu)材料提供了新的方法。另一方面,我們通過(guò)一步電化學(xué)沉積的方法,由石墨烯量子點(diǎn)組裝制備出結(jié)晶化的石墨烯納米膠囊。通過(guò)調(diào)控不同電極和反應(yīng)溶劑,可控制石墨烯納米膠囊的形成。通過(guò)實(shí)驗(yàn)推測(cè)石墨烯納米膠囊的形成機(jī)理是基于氫氣氣泡提供的軟模板而產(chǎn)生的。而且,當(dāng)石墨烯納米膠囊與石墨烯片結(jié)合后,表現(xiàn)出氧化還原催化活性。這項(xiàng)研究為設(shè)計(jì)和合成基于納米結(jié)構(gòu)的結(jié)晶化石墨烯開(kāi)拓了新的機(jī)會(huì),而且有希望作為先進(jìn)器件的候選材料。
[Abstract]:In this paper, functional modification and ordered assembly of carbon based quantum dots (QDs) were carried out, and novel carbon functional materials were designed and prepared.Hydrothermal and electrochemical methods were developed to prepare graphene quantum dots.Because the surface of graphene quantum dots is rich in oxygen-containing functional groups, it not only endows graphene quantum dots with good water solubility and makes the surface of quantum dots charged, but also provides various inorganic compounds, organic compounds, and organic compounds.The possibility of functionalized reactions between polymers or biological species provides a broader platform for assembling functional materials.On the one hand, we make graphene quantum dots spontaneously reduce and self-assemble on graphite-like carbon nitride nanoparticles by one step hydrothermal treatment, and form unique nanocomposites as a new kind of nonmetallic catalyst.Its catalytic activity in the redox reaction is significantly enhanced, and its catalytic activity is much higher than that of its single graphene quantum dots and graphite-like carbon nitride materials, and can even be compared with some graphene based materials.The nanocomposites studied in this work provide a new method for the preparation of novel graphite-like carbon nitride nanostructures.On the other hand, we prepared crystalline graphene nanocapsules by one-step electrochemical deposition from graphene quantum dots.The formation of graphene nanocapsules can be controlled by regulating different electrodes and reaction solvents.The formation mechanism of graphene nanocapsule is based on the soft template provided by hydrogen bubble.Moreover, when graphene nanocapsule binds to graphene sheet, it shows redox catalytic activity.This study opens up new opportunities for the design and synthesis of crystalline graphene based on nanostructures and is promising as a candidate for advanced devices.
【學(xué)位授予單位】：北京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：O613.71

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