台灣每年工廠排放大量染料廢水，這些廢水若直接排放將嚴重威脅台灣的生態環境，開發高通量、高選擇性之染料廢液處理薄膜，則可以同時解決工廠排放染料廢水汙染環境及染料回收再利用的問題，本研究將以開發處理染料廢液的高效能奈濾薄膜為主要目標。
本研究利用球磨結合脲素改質六方氮化硼(h-BN)合成胺化六方氮化硼奈米片(h-BN(-NH2)) ，並以真空輔助法製備疊層複合薄膜，奈米片沉積形成薄膜時，片與片之間常出現無選擇性的空隙(shortcuts)，或是片材本身在球磨時產生缺陷而導致低染料阻擋率，因此本實驗添加不同尺寸碳奈米片(氧化石墨烯(GO)及GO量子點)來修補缺陷並調控薄膜的微結構，將較大尺寸的GO奈米片與h-BN(-NH2)混和形成1wt% GO/h-BN(-NH2)薄膜；或是以小尺寸的GO量子點(GQD)作為摻混物製作1wt% GQD/h-BN(-NH2)薄膜。探討添加不同尺寸的碳奈米片對h-BN(-NH2)疊層複合薄膜微結構及奈米過濾效能的影響。
FTIR、XRD被用於確認胺基成功接枝在六方氮化硼邊緣並剝離成奈米片。 DLS、TEM結果可確認h-BN(-NH2)、GO及GQD之尺寸大小。Zeta potential、AFM、WCA用於鑑定薄膜表面之電性、粗糙度和親水性。DBES用於分析薄膜內部之微結構，確認GQD或GO的摻合可成功填補薄膜片層間的缺陷。
在奈濾分離測試中，h-BN(-NH2)薄膜之純水通量達到295.3 LMH bar-1，對於methyl green染料阻擋率僅72.9%；1wt% GQD/h-BN(-NH2)薄膜可增加methyl green的阻擋率至90.6% 並維持283.4 LMH bar-1的高純水通量；而1wt% GO/h-BN(-NH2)薄膜對於methyl green達到> 97.5%阻擋率、純水通量為170.8 LMH bar-1。
長時間抗結垢操作結果，h-BN(-NH2)、1wt% GQD/h-BN(-NH2)及1wt% GO/h-BN(-NH2)三種薄膜的通量回復率（FRR）分別為86.8%、88.3%、88.3%，三種薄膜皆表現良好的海藻酸鈉(SA)抗污染性能。

The factories in Taiwan discharge huge among of dye wastewater every year. It will seriously threaten Taiwan's ecological environment, if the dye wastewater was directly discharged. The development of high-flux and high-selectivity membranes for dye wastewater treatment can simultaneously solve the problem of dye wastewater discharge polluting the environment and dye recycling and reuse. The main goal of this research is to develop high-efficiency membranes for treating dye wastewater.
In this work, urea was used to modify inorganic hexagonal boron nitride (h-BN) to form ammoniated hexagonal boron nitride nanosheets (h-BN(-NH2)), and the laminated composite membranes were prepared by vacuum-assisted method. Shortcuts appear when stacking with the sheets, or the sheets formed defects during ball milling which result in low dye selectivity. Therefore, in this research, the blending of carbon nanosheets of different sizes are used to repair the defects and adjust the microstructure of the membranes. 1wt% GO/h-BN(-NH2) membrane was prepared by mixing larger-area GO nanosheets with h-BN(-NH2). Small-sized GO quantum dots (GQDs) blend with h-BN(-NH2) forming 1wt% GQD/h-BN(-NH2) membrane. The effect of the size of the blended nanosheets on the microstructure and nanofiltration efficiency of h-BN(-NH2) lamina composite membranes was investigated.
FTIR and XRD were used to confirm that amino groups were successfully grafted on the edge of hexagonal boron nitride and exfoliated into nanosheets. DLS and TEM results can confirm the size of h-BN(-NH2), GO and GQD. Zeta potential, AFM, WCA are used to identify the electrical properties, roughness and hydrophilicity of the membranes. DBES was used to analyze the microstructure of the membranes, confirming that the blending of GQD or GO can successfully fill the defects in the membranes.
The pure water flux of h-BN(-NH2) membranes for nanofiltration reaches 295.3 LMH bar-1, but the rejection of methyl green is only 72.9%; The 1wt% GQD/h-BN(-NH2) membranes maintain 283.4 LMH bar-1 high pure water flux and the rejection of methyl green reaches 90.6%; The pure water flux of 1wt% GO/h-BN(-NH2) membrane is 170.8 LMH bar-1 and over 97.5% dye rejection for methyl green dyes.
The results of anti-fouling test show that the three kinds of membranes have good anti-fouling performance. The Flux recovery ratio (FRR) for h-BN(-NH2), 1wt% GQD/h-BN(-NH2) and 1wt% GO/h-BN(-NH2) membranes are 86.8%, 88.3% and 88.3%, respectively.

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