新穎材料農業：農業新穎材料在農產品保鮮開發、應用與機理【土壤環境科學系/林耀東特聘教授】
| 論文篇名 | 英文：Doping TiO2 with CuSO4 enhances visible light photocatalytic activity for organic pollutant degradation 中文：CuSO4摻雜TiO2可增強可見光光催化降解有機污染物的活性 |
| 期刊名稱 | Environmental Science and Pollution Research |
| 發表年份,卷數,起迄頁數 | 2020, 27, 24604–24613 |
| 作者 | de Luna, Mark Daniel G.; Garcia-Segura, Sergi; Mercado, Chinee H.; Lin, Yao-Tung(林耀東); Lu, Ming-Chun* |
| DOI | 10.1007/s11356-019-05789-5 |
| 中文摘要 | 光催化是最有前途的高級氧化過程之一，因為固體催化劑能夠在光照射下連續產生氧化劑物質。使用傳統紫外線燈的成本很高，這破壞了在發展中國家的可能實施。可見光活性光催化劑可以克服這些挑戰，並為有競爭力的技術實施找到市場機會。這項工作提出了在簡便的溶膠-凝膠合成之後合成可見光活性催化劑，該合成將 CuSO4 作為 TiO2 中的摻雜劑引入。結果表明，在 50 mW cm-2 藍光（λ = 450 nm）下處理 120 分鐘後亞甲藍完全減少，而商業 P25 TiO2 在相同條件下顯示無效減少。包括摻雜劑水平和煅燒溫度在內的合成參數允許基於材料特性修改和催化活性增強來定義最佳合成條件。將 0.21 mol% CuSO4 的摻雜水平確定為使在 300°C 下煅燒的摻雜 TiO2 催化劑進行可見光光催化的最佳條件。最後，對操作參數進行了評估，定義了在 3.0 g L-1 催化劑劑量下的寬範圍 pH 操作，以處理高達 20 g L-1 的高度頑固吩噻嗪染料。這些最佳條件允許在處理 120 分鐘後在可見光下完全去除染料。 |
| 英文摘要 | Photocatalysis is one of the most promising advanced oxidation processes due to the capability of solid catalyst to continuously produce oxidant species under light irradiation. The use of conventional UV lamps is high cost intensive, which undermines the possible implementation in developing countries. Visible light active photocatalysts can overcome these challenges and find a market opportunity for competitive technology implementation. This work proposes the synthesis of visible light active catalyst following a facile sol-gel synthesis that introduces CuSO4 as dopant in TiO2. Results present complete abatement of methylene blue in 120 min of treatment under 50 mW cm−2 of blue light (λ = 450 nm), while commercial P25 TiO2 presented null abatement under identical conditions. Synthesis parameters including dopant level and calcination temperature allowed defining optimum synthesis conditions based on material characteristics modification and catalytic activity enhancement. A doping level of 0.21 mol% CuSO4 was identified as optimum condition to enable visible light photocatalysis of doped TiO2 catalysts calcined at 300 °C. Finally, operational parameters were evaluated defining a wide range of pH operation under 3.0 g L−1 of catalyst dose to treat up to 20 g L−1 of highly recalcitrant phenothiazine dye. These optimum conditions allowed complete dye removal under visible light after 120 min of treatment. |
| 發表成果與本中心研究主題相關性 | 農業新穎材料在農產品保鮮開發、應用與機理 |
