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不同金屬離子修飾的氧化石墨烯的制備表征

時間:2019-05-11 19:30來源:畢業論文
采用改進的Hummers法制備氧化石墨烯(GO),然后將金屬離子吸附到GO表面,形成功能化的氧化石墨烯(GO-M)。通過紫外吸收光譜、熒光光譜和X射線衍射光譜(XRD)對所得產物進行了初步

摘要:氧化石墨烯由于特殊的結構,在電學、光學及熱導性能等方面都有很多優異性。但當大量的石墨烯片在一起時,很容易由于范德華力吸引而重新聚集在一起,重新回到石墨狀態。故本文希望通過金屬離子修飾氧化石墨烯,能形成穩定的石墨烯結構,在儲能方面和電池方面能更有效的利用。本文采用改進的Hummers法制備氧化石墨烯(GO),然后將金屬離子吸附到GO表面,形成功能化的氧化石墨烯(GO-M)。通過紫外吸收光譜、熒光光譜和X射線衍射光譜(XRD)對所得產物進行了初步表征。進而研究了金屬離子濃度和種類對氧化石墨烯光譜性能的影響。結果表明,金屬離子的引入,對GO的熒光沒有明顯影響,在紫外吸收方面除了個別離子的個別濃度有明顯差異外,其他離子的其他濃度并無明顯差別。而通過XRD表征,證明吸附金屬離子的氧化石墨烯層間距增大。35331
畢業論文關鍵詞:修飾;氧化石墨;制備;表征
Preparation of graphene oxide modified by different metal ions
Abstract: Because of the special structure of graphene oxide, there are many advantages in the electrical, optical and thermal conductivity of graphene.. But when a large number of graphene sheets together, it is easy to attract and re gathered together due to van Edward force, resulting in re returning to graphite state. It is hoped that graphene oxide can form stable graphene structure by metal ion modified graphene oxide, and can be used more effectively in energy storage and battery. In this paper, using a modified Hummers method for the preparation of graphene oxide (GO) and ultrasonic stripping graphene oxide nano preparation of layered structure, metal ions are adsorbed onto the surface of go, formation of functionalized graphene oxide GO-M. Study the performance of different concentration and different metal ion modification of graphene oxide is improved, by UV absorption spectra, fluorescence spectra and X-ray diffraction spectra (XRD) were used to characterize the chemical structure. The results show that metal ion doping, in the fluorescence detection of no significant difference, in the ultraviolet absorption in addition to the inpidual concentrations of inpidual ions have obvious difference, other ions other concentration had no significant difference. The graphene oxide layer spacing of graphene oxide layer is increased, so the structure is more stable with XRD. 源¥自%六:維;論-文'網=www.aftnzs.live
Keywords: Modification; graphite oxide;preparation;characterization
目錄
1. 引言    1
1.1 石墨烯的簡介    2
1.1.1石墨烯的發現及其結構    3
1.1.2 石墨烯的制備及應用價值    4
1.2氧化石墨烯簡介[5]    4
1.2.1 氧化石墨烯的結構和特征    5
1.2.2 共價法修飾氧化石墨烯[3-5]    5
1.2.3 非共價法修飾氧化石墨烯[9]    6
1.3 石墨烯復合材料在能源領域的應用    6
1.3.1鋰離子電池    6
1.3.2 燃料電池電極催化劑載體    7
1.3.3 光伏電池    7
1.4 石墨烯的儲能應用-燃料電池    7
1.4.1石墨烯修飾的燃料電池[16]    8
1.4.2石墨烯作為燃料電池基底[18]    8
1.4.3石墨烯作為非共價功能化聚合物    9
1.4.4石墨烯作為ORR催化劑    10
1.5 石墨烯的儲能應用-太陽能電池    11
1.5.1 在電池活性層作為傳輸材料的邊緣石墨烯    11
1.5.2 功能化石墨烯    12
1.5.3 基底平面官能化氧化石墨烯中的PSCs有孔提取層    13
1.6 選題意義及主要研究內容    14
2. 實驗部分    16 不同金屬離子修飾的氧化石墨烯的制備表征:http://www.aftnzs.live/huaxue/20190511/33234.html
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