本文選題：氧化石墨烯 + 納米復(fù)合材料　； 參考：《西南科技大學(xué)》2017年碩士論文

【摘要】：氧化石墨烯(GO)作為化學(xué)法制備石墨烯的前驅(qū)物,由于在表面及邊緣上大量含氧基團的引入,易于修飾與功能化,可控性高且保持著化學(xué)穩(wěn)定性�；谑┑膹�(fù)合材料是石墨烯應(yīng)用領(lǐng)域中的重要研究方向,其在能量儲存、電子器件、生物材料、傳感材料和催化劑載體等領(lǐng)域展現(xiàn)出了優(yōu)良性能,具有廣闊的應(yīng)用前景。雖然原材料石墨片來源廣泛、成本低廉,但石墨烯、還原氧化石墨稀為疏水性且易于團聚,很難充分發(fā)揮其優(yōu)良性能,因此,對氧化石墨烯進行功能化且制備宏觀材料一直是材料研究熱點。本論文通過使用無機納米材料(銀納米粒子、二氧化硅納米線、納米二氧化鈦)和有機高分子材料(卡拉膠和魔芋葡甘聚糖)對氧化石墨烯進行功能化并自組裝成宏觀塊體或薄膜材料,并將所制備材料應(yīng)用于芳香族化合物可見光催化和仿生材料研究。本論文的主要研究內(nèi)容與結(jié)果如下:(1)通過簡單的溶液混合方法,在常溫下制備得到了不同銀納米粒子含量的形貌均一的系列3-D網(wǎng)狀結(jié)構(gòu)的宏觀可分離AgNPs-SiO_2NWs-RGO納米復(fù)合材料,并將其用于催化還原對硝基苯酚。復(fù)合材料各組分之間以強分子間氫鍵和靜電吸附作用相互結(jié)合。材料的疏水性和弱磁性有利于材料的重復(fù)使用。AgNPs添加量為10 mL時,復(fù)合材料表現(xiàn)出最佳的光化學(xué)催化性能及穩(wěn)定性。(2)通過水熱反應(yīng)方法,在130℃,反應(yīng)10小時制備得到了不同Ag-TiO_2含量的形貌統(tǒng)一的系列特殊的具有皺紋的3-D粗糙蓬松結(jié)構(gòu)的宏觀可分離Ag-TiO_2/RGO納米復(fù)合材料,并將其應(yīng)用于催化降解單寧酸。Ag-TiO_2與RGO之間生成Ti-O-C連接,但C原子并未進入TiO_2晶格間隙。材料的疏水性有利于塊體材料的重復(fù)使用。Ag-TiO_2添加量為25 mg時,復(fù)合材料表現(xiàn)出最佳的光化學(xué)催化性和穩(wěn)定性。(3)通過自蒸發(fā)溶液自組裝法,在最佳制備條件下制備了不同GO添加量的具有界限分明的層狀結(jié)構(gòu)的天然高分子/氧化石墨烯納米復(fù)合薄膜材料。GO與高分子之間以強的分子間氫鍵連接,GO含量達到10 wt%時會出現(xiàn)GO團聚成石墨的現(xiàn)象。GO的添加有效的提高了薄膜的機械性能,GO含量為7.5 wt%時達到機械性能的最佳值。GO的存在使得薄膜材料能有效抵抗冷熱循環(huán)和臭氧老化對于材料性能的破壞。細胞毒性測試表明無毒高強度的CKG薄膜具有很好的細胞生物相容性。本論文通過嘗試不同的材料和方法,制備得到了不同性能的氧化石墨烯納米復(fù)合材料,并有望在催化和生物材料領(lǐng)域?qū)崿F(xiàn)應(yīng)用。
[Abstract]:Graphene oxide (GOO) is a precursor for the preparation of graphene by chemical method. Because of the introduction of a large number of oxygen-containing groups on the surface and edge, it is easy to modify and functionalize, and has high controllability and chemical stability. Graphene based composite is an important research field in graphene applications. It has shown excellent properties in energy storage, electronic devices, biomaterials, sensing materials and catalyst carriers, and has broad application prospects. Although the raw material graphite sheet has a wide range of sources and low cost, but graphene, reduced graphite oxide thin is hydrophobic and easy to agglomerate, it is difficult to give full play to its excellent properties. The functionalization of graphene oxide and the preparation of macroscopical materials have been the focus of material research. In this paper, inorganic nanomaterials (silver nanoparticles, silica nanowires, silica nanowires) were used. Nano-TiO _ 2) and organic polymer materials (carrageenan and konjac glucomannan) functionalized graphene oxide and self-assembled into macroscopic bulk or thin film materials, The prepared materials were applied to the visible light catalysis and biomimetic materials of aromatic compounds. The main contents and results of this thesis are as follows: (1) A series of macroscopically separable AgNPs-SiO-2 NWs-RGO nanocomposites with homogeneous morphology of different silver nanoparticles were prepared at room temperature by simple solution mixing method. It was used for catalytic reduction of p-nitrophenol. The intermolecular hydrogen bond and electrostatic adsorption are combined among the components of the composite. The hydrophobicity and weak magnetic properties of the composite are favorable to the reuse of the material. When the amount of AgNPs added is 10 mL, the composite exhibits the best photochemical catalytic performance and stability by hydrothermal reaction at 130 鈩，

本文編號：2013000