超分子法制备氮化碳及其性能研究

摘要本文以三聚氰胺-三聚氰酸超分子为前躯体，采用超分子自组装的方法成功制备了球形氮化碳，并通过氢氧化钾的强碱作用对其表面进行改性研究。结果表明：与传统氮化碳相比，由超分子自组装方法制备的氮化碳具有更高的物理化学稳定性，并成功应用于亚甲基蓝、罗丹明B、中性红和对硝基苯酚等有机污染物的降解；其中，氢氧化钾改性后的氮化碳吸附能力和光催化活性都有明显提高，这主要是因为改性后的氮化碳具有更大的比表面积，光吸收范围明显增加，光生电子和空穴的分离能力显著增强。除此之外，超分子法制备的氮化碳及其表面改性之后的氮化碳都具有良好的循环性能，在循环使用3 次之后，其催化活性依然能保持在90%以上。74315

毕业论文关键词光催化氮化碳超分子氢氧化钾改性对硝基苯酚

毕业设计说明书外文摘要

Title Synthesis of highly photoactive carbon nitride through solvent

mediated supramolecular interactions of monomers

Abstract Spherical carbon nitride has been synthesized via supramolecular self-assemble method with cyanuric acid-melamine aggregates as the precursor。 Sequential solvents were introduced to improve the stability of the aggregates, avoiding their collapse during the calcination。 SEM shows very homogeneous spherical morphology of produced carbon nitride after sequential solvents treatment。 Besides, potassium hydroxide was involved to modify the carbon nitride’s surface。 In terms of photocatalytic performance of carbon nitride, ones after the modification showed superior adsorption capacity and seductive catalytic activity on methylene blue and neutral red, which was contributed to the larger surface area, enhanced light adsorption and efficient transportation。 Furthermore, attractive stability was also presented of spherical carbon nitride, even after 3 cycles of photocatalysis, the degradation degree was still above 90%。

Keywords photocatalysis carbon nitride supramolecular KOH modified p-nitrophenol

1 引言 1

1。1 半导体光催化 1

1。2 氮化碳 2

1。3 超分子自组装 3

1。4 本课题的研究内容与意义 4

2 球形氮化碳的制备、表征及光催化测试 6

2。1 实验试剂 6

2。2 球形氮化碳的制备 6

2。3 球形氮化碳的表征 7

2。4 球形氮化碳的光催化性能测试 7

3 球形氮化碳的形貌和结构研究 9

3。1 球形氮化碳的形貌研究 9

3。2 球形氮化碳的结构研究 12 超分子法制备氮化碳及其性能研究:http://www.youerw.com/huaxue/lunwen_84891.html