摘要用不同条件下焙烧的氮化碳与硫化镉通过共沉淀法合成硫化镉-氮化碳复合材料,并使用X射线衍射、透射电子显微镜、比表面积测定仪进行表征。氮化碳与硫化镉复合可以减少硫化镉的光腐蚀作用,从而使该复合材料具有很高的可见光催化活性。焙烧所需氮化碳的最佳材料是三聚氰胺,最适合温度是520℃。该条件下合成的复合材料对弱酸性废水的处理效果好于氧化性及强酸性废水,并且随废水浓度升高处理的效果逐渐下降。64143
毕业论文关键词 硫化镉氮化碳复合材料 光腐蚀作用 可见光催化性能
毕业设计说明书(论文)英文摘要
The Synthesis of C3N4-CdS and the Study on Its Visible-light Photocatalytic Activity
Abstract C3N4-CdS were prepared by C3N4 synthesized in different conditions and CdS via coprecipitation method and characterized by X-ray diffraction, transmission electron microscopy, BET surface area measurement. The combination of C3N4 and CdS can reduce the photocorrosion of CdS, consequently improving the visible-light photocatalytic activity of C3N4-CdS. The best material for synthesizing C3N4 is melamine at the best temperature 520℃. The C3N4-CdS synthesized under the above conditions have a better photocatalytic activity in weakly acidic wastewater compared with those in oxidizing wastewater and strongly acidic wastewater. In addition, the effects are getting worse as the concentration of the wastewater increases.
Keywords C3N4-CdS photocorrosion visible-light catalytic activity
目录
1.绪论 1
1.1光催化概述 1
1.1.1光催化技术 1
1.1.2光催化反应机理 1
1.1.3光催化剂 3
1.2可见光催化技术 4
1.3硫化镉概述 5
1.3.1硫化镉的理化性质 5
1.3.2硫化镉的作用和用途 5
1.3.3硫化镉的危险性 5
1.3.4硫化镉的光催化性能 5
1.4 氮化碳概述 6
1.4.1氮化碳的合成研究 6
1.4.2氮化碳合成的难点 9
1.4.3氮化碳的光催化性能 10
1.5 复合材料光催化剂的研究背景 10
1.6 实验试剂及实验仪器 11
1.6.1 实验试剂 11
1.6.2 实验仪器 13
2.硫化镉氮化碳复合材料的制备实验 13
2.1 氮化碳的制备 13
2.2 硫化镉氮化碳复合材料的制备 14
3.硫化镉氮化碳复合材料的表征 14
3.1 透射电子显微镜分析(TEM) 14
3.2 X射线衍射图(XRD) 17
3.3 BET比表面积分析 19
4.硫化镉氮化碳复合材料的可见光催化反应实验 19
4.1 不同硫化镉氮化碳复合材料的可见光催化性能试验 19
4.1.1 最适合催化剂投加量的实验 19