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研究生： 楊朝仁
Yang, Chao-Jen
論文名稱： 經光化學改質後氧化石墨烯濾膜於水處理之應用
Filtration Membranes Fabricated by Photochemically Modified Graphene Oxide Towards Water Treatment
指導教授： 侯文哲
Hou, Wen-Che
學位類別： 碩士
Master
系所名稱： 工學院 - 環境工程學系
Department of Environmental Engineering
論文出版年： 2016
畢業學年度： 104
語文別： 英文
論文頁數： 56
中文關鍵詞： 氧化石墨烯 、太陽能改質 、天然有機物 、膜過濾
外文關鍵詞： Graphene Oxide, Solar Modification, Natural Organic Matter, Membrane Filtration
相關次數： 點閱：131  下載：3 
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    • 氧化石墨烯是一種兩維的奈米材料，它具有廣泛的應用潛力如光電、光催化、奈米醫學、環境整治等等。有越來越多的石墨烯衍生物被用於製造高性能的濾膜，並用於去除水中之污染物。近年來的研究大多以改質氧化石墨烯結構之方式來製作濾膜。雖然這些改質方法是有效的，但在製作過程中它們所消耗的能量與其排出的廢棄物可能導致更多的碳足跡，進而污染我們的環境。
    本研究之目的是以環保的太陽能來改質氧化石墨烯，以製作高性能的濾膜，且在其改質過程中沒有任何化學藥劑的使用。本研究發現，經過光化學改質後之氧化石墨烯濾膜能有效提高污染物的去除率與通量(80 ± 0.3 LMH/bar)，在pH=8時，其通量約是原始的氧化石墨烯濾膜的兩倍。同時在pH值的變化下，光化學改質後比起原始的氧化石墨烯濾膜擁有更加穩定的過濾表現。此外，與其他超濾膜與原始的氧化石墨烯濾膜相比，光化學改質後之氧化石墨烯濾膜展現出較高的天然有機物去除率。本研究提供了氧化石墨烯濾膜一個新的改質方法。

    Graphene oxide, a two-dimensional nanomaterial, is promising in a range of proposed applications such as light-emitting electronics, photocatalysis, nanomedicine, environmental remediation to name a few. Increasingly, graphene-based nanomaterials are used to fabricate high-performance filtration membranes that can remove pollutants from water for a range of water treatment purposes. These recent studies have mostly used as-prepared GO to create water filtration membranes with limited work involving structurally modified GO materials. While these modification processes are effective, they could leave greater ecological footprints as a result of the wastes discharged and energy consumption.
    This research was to present a greener method that uses solar energy without any chemical addition to tune the properties of GO that is used to fabricate high-performance water filtration membranes. It was found that the photochemical modification GO membrane exhibit enhanced pollutant rejection and permeate fluxes (80 ± 0.3 LMH/bar), roughly 2 times higher than pristine GO membranes in pH = 8. And, the filtration performance of photochemical modification GO membrane was stable than pristine GO membranes with pH chance. In addition to, photochemical modification GO membranes exhibited a greater NOM removal compared to GO membranes and commercially available UF membranes. This provides a new modification method of the GO membrane for enhancing the filtration performance.

    摘要 I Abstract II Acknowledgement III Contents IV List of Table VII List of Figure VIII List of Symbols XI Chapter 1 Introduction 1 1.1 Background 1 1.2 Objectives 2 Chapter 2 Literature Review 3 2.1 Graphene-Based Nanomaterials 3 2.2 GO Synthesis and Modification 4 2.2.1 Synthesis 4 2.2.2 Modification 6 2.3 Membrane Filtration for Water Treatment 7 2.4 Graphene-Enabled Membrane Filtration 9 2.4.1 Physical deposition 10 2.4.2 Chemical binding 10 2.4.3 Blended into membrane 11 Chapter 3 Materials and Methods 17 3.1 Materials. 17 3.2 Preparation of GO Materials. 17 3.3 GO Modification. 18 3.4 Membrane Assembly 19 3.4.1 Physical Deposition 19 3.4.2 Cross Linking 20 3.5 Filtration 20 3.6 Analysis 21 Chapter 4 Results and Discussion 24 4.1 Characterization of GO before and after photochemical modification 24 4.1.1 AFM image 24 4.1.2 XPS 26 4.1.3 TOC 27 4.1.4 Zeta potential 28 4.2 Characterization of GO- and modified GO-enabled membranes 28 4.2.1 Images of membranes 29 4.2.2 SEM 29 4.2.3 Contact angle 30 4.3 Parameters affecting membrane filtration performances 31 4.3.1 GO loading effect 31 4.3.2 GO modification effect 32 4.3.3 pH effect 34 4.3.4 Filtration pressure effect 37 4.3.5 Filtration time effect 38 4.4 Filtration of different solutes 41 4.4.1 Rhodamine 6G and Rhodamine B 42 4.4.2 Filtration of NOM 44 4.5 Effect of Cross Linking (CL) 48 Chapter 5 Conclusions 50 References 52

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