太陽能光電產業在台灣蓬勃發展，貴金屬如銦、鎵和硒等稀散元素需求量大，但製程中所產生廢料往往未被妥善地處理及回收再利用，以共蒸鍍製程為例，主要產生廢料為真空腔壁內遮板上的沉積生成物，其組成為大量硒摻雜少量的銅、銦及鎵。
本研究從資源回收與資材化兩個面向探討CIGS含硒資材再利用可行性，資源回收係透過鹽酸浸漬方式，提高含硒資材中的硒純度，以期能夠回收再利用，同時達到銅、銦及鎵與硒分離目的；資材化將未經提純含硒資材進行奈米化，探討利用奈米硒微粒及將其披覆於載體表面，應用於勻相與異相光催化反應降解染料-亞甲基藍及材料表面抑菌之可行性。
實驗結果得知，鹽酸浸漬可將含硒資材中硒純度由92.92%（1N2）提高至99.57%（2N5），反應條件為70℃，鹽酸12N，浸漬時間24小時。最佳奈米化條件為硒代硫酸鈉濃度1474 mg/L，硫酸4.5M及PVA 1%，奈米硒微粒粒徑分布範圍為28.8至33.8 nm。勻相光催化部分，透過最佳奈米化條件合成奈米硒微粒可得最佳脫色率為21.1%，非勻相光催化部分，由含浸法在披覆液硒代硫酸鈉濃度328.6 mg/L，硫酸4.5M及PVA0.125%條件下製備的氧化鋁載體可得最佳脫色率為36.11%，團簇法在硒代硫酸鈉濃度1179.2 mg/L，硫酸4.5M條件下製備的氧化鋁載體可得最佳脫色率為29.86%，非勻相光催化部分的脫色率皆高於勻相光催化，且能夠減少硒流佈至環境中的濃度及機會。抑菌成效以團簇法製備PP纖維布效果最佳，24小時可達抑菌率99%。歸納上述實驗結果，含硒資材的硒純度可以鹽酸浸漬的方式提高；資材化部分，透過奈米化製備奈米硒微粒，可使其具有勻相及異相光催化降解亞甲基藍及使材料表面具有抑菌的能力。

Recently the growth of Optoelectronics industry in Taiwan is very quick. Many precious metals and rare elements, like indium, gallium and selenium, have been used during making process. Wastes from the making process was seldom treated and reused well. It will cause environmental problem. For example, CIGS co-evaporation process. The main composition of the wastes is selenium and the rest is copper, indium and gallium.
This study discussed the reuse possibility and other application of selenium-containing sources comes from CIGS co-evaporation process. Dipping into hydrochloric acid could improve the purity of selenium and separate selenium from other metal for reusage. For another application, synthesizing selenium nanoparticles is not only for homogeneous and heterogeneous photocatalysis to decolor Methylene Blue but also for inhibiting growth of Escherichia coli(E. coli)on the substrate surface.
From the results, the purity of selenium could be achieved about 99.57% under temperature 70℃, hydrochloric acid concentration was 12N and dipping time was 24 hours. The optimal conditons for synthesizing selenium nanoparticles were [sodium selenosulphate] = 1474 mg/L, [sulphuric acid] = 4.5 M ,and [polyvinyl alcohol] = 1%. Under the optimal conditions, the size distribution of selenium nanoparticles was from 28.8 to 33.8 nm. The best decolor rate for homogeneous photocatalysis was about 21.1%. For heterogeneous photocatalysis, the best decolor rate of substrate coated selenium nanoparticles under the conditions [sodium selenosulphate] = 382.6 mg/L, [sulphuric acid] = 4.5 M ,and [polyvinyl alcohol] = 0.125% by impregnation method was 36.11% and under [sodium selenosulphate] = 1179.2 mg/L, and [sulphuric acid] = 4.5 M by cluster method was 29.86%. Compared with homogeneous photocatalysis, decolor rate of is higher. The heterogeneous photocatalysis can also reduce concentration of selenium leakage into the environment. The substrate coated selenium nanoparticles by cluster method could inhibit more E. coli compared with impregnation method on the surface in 24 hours. The best inhibit growth rate of cluster method in 24 hours was about 99%.
According to the results, using hydrochloric acid could improve the purity of selenium and separate it from the selenium-containing sources for reusage. Synthesizing selenium nanoparticles could be potential for homogeneous and heterogeneous photocatalysis to decolor methylene blue and for inhibiting growth of Escherichia coli(E. Coli)on the substrate surface for other application.

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