- 學位論文
以SnO2/Bi2S3-BiOCl對酸性染料進行光催化降解
Photocatalytic activity of SnO2/Bi₂S₃-BiOCl for removal of Acid red
摘要
在此研究中，使用酸性紅色染料廢水的處理的SnO2 /的Bi2S3-BiOCI複合材料。通過使用不同重量百分比的SnO2, Bi2S3, 5％SnO2/Bi2S3 -BiOCl，15％SnO2/ Bi2S3-BiOCl，30％SnO2/Bi2S3-BiOCl 和50％SnO2/ Bi2S3-BiOCl的水熱法製備所有催化劑。使用X射線衍射（XRD），漫反射光譜（DRS），掃描電子顯微鏡（SEM），傅里葉變換紅外光譜（FTIR）分析獲得的複合材料。對於的SnO2/Bi2S3 -BiOCl複合材料，我們研究了不同的SnO2/Bi2S3 -BiOCl濃度的效果，的SnO2/Bi2S3 -BiOCl pH計，催化劑用量，對降解率可重用性調查。最初，確定了SnO2/Bi2S3 -BiOCl催化劑的最佳合成條件，然後將這些優化條件用於酸性紅，該酸性紅用作模型污染物. SnO2/ Bi2S3 -BiOCl複合材料的光催化降解表明，不同百分比的複合催化劑比純Bi2S3, SnO2催化劑具有更高的效率和穩定性。觀察到由15％SnO2/Bi2S3 -BiOCl製成的複合材料在三個循環中更穩定，最後一次催化劑弱化並降低了效率，第三次循環測試的效率為46.2％。用15％的SnO2/Bi2S3 -BiOCl，5％的SnO2/Bi2S3 -BiOCl分別為0.03g和0.05g，獲得了高酸紅色去除率57％和45％。光降解實驗在不同的參數完成諸如催化劑用量的SnO2，Bi₂S₃，5％的SnO2/Bi₂S₃-BiOCl，15％的SnO2/Bi₂S₃-BiOCl，30％的SnO2/Bi₂S₃-BiOCl，50％的SnO2/Bi₂S₃-BiOCl。在這裡固定了0.03克催化劑的15％SnO2 / Bi2S3具有約57％的去除效率。SnO2/Bi2S3劑量（0.03g）的進一步增加顯著增加了酸性紅的去除。但是，純Bi2S3和SnO2的去除效率分別為6％和4％。
關鍵字
光催化活性並列摘要
In this study, SnO2/Bi2S3-BiOCl composites were used for the degradation of acid red dye from wastewater. All the catalysts were prepared by hydrothermal method using different percentages weight of SnO2, Bi2S3, 5% SnO2/Bi2S3-BiOCl, 15% SnO2/Bi2S3-BiOCl, 30% SnO2/Bi2S3-BiOCl and 50% SnO2/Bi2S3-BiOCl. The obtained composites were analyzed using X-ray diffraction (XRD), Diffuse reflectance spectroscopy (DRS), Scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR). For the SnO2/Bi2S3-BiOCl composites, investigated the effect of different acid red dye concentrations, effect of pH, catalyst amounts, reusability investigation on photodegradation efficiency. Initially, the optimal synthesis conditions for SnO2/Bi2S3-BiOCl catalysts were identified and then these optimized conditions were used for Acid red that was used as a model pollutant. Photocatalyst degradation of SnO2/Bi2S3-BiOCl composites showed that the different percentage composite catalysts were more efficiency and stable than the pure Bi2S3, SnO2, catalysts. The composite fabricated with 15% SnO2/Bi2S3-BiOCl was observed to be more stable for 3st cycles. The photodegradation experiment was completed at different parameter such as catalyst dosage SnO2, Bi₂S₃, 5% SnO2/Bi2S3-BiOCl, 15% SnO2/Bi2S3-BiOCl, 30% SnO2/Bi2S3-BiOCl, 50% SnO2/Bi2S3-BiOCl. In this study 15% SnO2/Bi₂S₃-BiOCl under the optimum operating condition (initial concentration of acid red was 10 ppm, catalyst dosage was 0.03 g, and pH value was 7.0), the degradation rate of Acid red was 57% within 180 min under visible light. However, the removal efficiencies of pure Bi₂S₃ and SnO2 were 6% and 4% respectively.