在此研究中，β-幾丁聚醣(Chitosan)作為主要反應物，其吸附機制是透過大量的官能基(Hydroxy and amino groups)進行吸附，但其材料在熱與酸性環境下不穩定以及機械強度不足，所以利用氧化石墨烯 (Graphene oxide)提高材料性能，Graphene oxide擁有高比表面積及穩定性佳之外，利用它表面上的含氧官能基進行氮胺基改質，改善其團聚的問題並且增加表面活性位點，並用傅立葉變換紅外光譜、拉曼光譜、元素分析、界達電位、掃描電子顯微鏡證明成功合成三乙烯四胺官能化氧化石墨烯(TFGO)。我們使用冷凍乾燥技術製備發泡材，因吸附材在發泡材型態時，可藉由延展表面增加吸附位點，因此，比較了無孔幾丁聚醣(Non-porous chitosan)、多孔幾丁聚醣發泡材(Chitosan foam)與多孔幾丁聚醣/三乙烯四胺官能化氧化石墨烯發泡材(CS/TFGO foam)的吸附能力，在室溫下固定一小時pH值2至10做吸附測試，Non-porous chitosan吸附容量從96.05mg/g至53.24 mg/g、Chitosan foam吸附容量從1022.76mg/g至187.18 mg/g而CS/TFGO foam吸附容量從1672.09 mg/g至997.81 mg/g，由此的知CS/TFGO foam吸附染料的能力得到明顯的提升尤其是在鹼性的環境下，有望應用於工業廢水處理。

In this study, we report a facile method for preparing high porosity hybrid foams through the use of a hybrid β-chitosan (BC)/graphene oxide (GO) template by freeze-drying process. The CS as the main adsorbent agent that adsorption mechanism through a large number of functional groups in chitosan derivatives (amino group and hydroxyl group) for organic C.I. Reactive Red 195 dye (RB195) adsorption. Besides, the graphene oxide (GO) consist of large surface area and mechanical stability to improve chitosan derivatives properties due to CS is unstable under acidity, low thermal stability, and lack of mechanical properties. The surface functional groups of GO can be functionalized by triethylenetetramine (TETA) that show improvement in functional groups, surface active sites and prevent the aggregation of GO platelets into larger species forms. TETA functionalized graphene oxide (TFGO) were analyzed with Fourier transform infrared spectroscopy (FTIR), Raman spectra, elemental analyses (EA), zeta potential and scanning electron microscope (SEM) to demonstrate the successful synthesis. In addition, freeze dryer could been prepared foams from CS/TFGO solutions that increase the adsorption site by stretching the surface. Therefore, compare the adsorption capacity of non-porous CS, CS foam (high porosity) and CS/TFGO foam (high porosity) with pH 2 to 10 for 1 h at 25oC. The adsorption capacity for the RB195 dye of non-porous CS from 96.05 mg/g to 53.24 mg/g, CS foam from 1022.76mg/g to 187.18 mg/g and CS/TFGO foam from 1672.09 mg/g to 997.81 mg/g. CS/TFGO foam shows adsorption capacity is improved, especially under weak alkaline conditions and it is expected to be applied for industrial effluent treatment.

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