使用CdIn2S4材料光催化降解水中雙酚A之研究

Photocatalytic degradation of bisphenol A by CdIn2S4 catalysts

宋育勳(YU-XUN SONG)

指導教授 ： 張益國 ； CHANG,YI-KUO

中臺科技大學/健康科學院/環境與安全衛生工程系碩士班/碩士(2019年)

摘要

摘要
近年來以光催化降解去除有機污染物為環境污染處理中相當有未來發展性的處理技術，故本研究以鎘銦硫化物(CdIn2S4) 光觸媒來進行光催化降解水中的雙酚A (BPA)，並探討其降解情形及影響催化的因子。研究發現藉由CdIn2S4對於BPA進行光催化反應，大約24小時降解率可達到96％，在實驗中分別探討：光觸媒的劑量、溶液的酸鹼性、鹽類的添加、溶液中BPA 的濃度、不同水樣基質，對於整體降解效率的影響，並探討材料回收再利用對BPA的降解效果，接著研究光催化過程中活性物質是否在其中扮演重要的角色，最後測定降解過程中產生之中間產物，並推導可能的光催化降解機構。實驗結果發現加入適量的CdIn2S4光觸媒可以提高對BPA 的降解效率，溶液的酸鹼性及溶液中的鹽類會影響光催化降解的效果，當樣品溶液濃度越高時，光催化的降解效率也跟著變差，河水的樣品溶液相較於去離子水的樣品溶液，光催化降解效率雖然較差，但照光24小時仍能有效降解BPA達80%以上，因此CdIn2S4光觸媒能實際應用在自然環境水樣。

關鍵字

光催化 ； 雙酚A ； 鎘銦硫化物

並列摘要

Abstract
In recent years, photocatalytic degradation has been a promising technique for the treatment of organic pollutants. Therefore, we synthesize cadmium indium sulfide (CdIn2S4) photocatalyst and use this catalyst to degrade bisphenol A (BPA) in water under visible light irradiation. It was found that the degradation rate of BPA can reach 96% after 24hr of irradiation. The effects of various parameters, such as the amount of the photocatalyst, pH of the system, concentration of BPA and presence of anions have been studied. Besides, we explore the main active substance (h+,•OH, O2•−) in the photocatalytic reaction and investigate the recyclability and the potential of CdIn2S4/visible system for practical applications in treatment of environmental water samples. To scrutinize the mechanistic details of the BPA photodegradation, the intermediates of the process are separated, identified, and characterized by solid-phase microextraction (SPME) and gas chromatography/mass spectrometry (GC/MS). The photocatalytic degradation rate of BPA is found to increase with CdIn2S4 dosage. The photodegradation is much more efficient under acidic conditions (pH 3~6) and decreases with increasing pH. In addition, the presence of inorganic anions decreases the photocatalytic degradation rate of BPA slightly. Although the photocatalytic degradation rate of BPA in river water is not as good as in deionized water, the BPA can also be degraded more than 80% after 24hr of irradiation, so the CdIn2S4 photocatalyst can be practically applied to the natural environment water sample.

並列關鍵字

photocatalysis ； bisphenol A ； cadmium indium sulfide

參考文獻

參考文獻

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