摘要本实验以二氰二胺，尿素，三聚氰胺，硫脲为原料通过热聚合法合成氮化碳，反复烧制，得到层数较少的氮化碳。以硫化钠九水合物为硫源，以钼酸铵四水为钼源，通过与由四种原料合成的氮化碳进行复合，制备出四种不同的氮化碳，通过进行 XRD、Raman、TEM测试，对样品进行了成分分析和性能表征，并进行了对亚甲基蓝和罗丹明B的吸附性能和在可见光光条件下的催化降解实验。实验结果表明由尿素制得的氮化碳具有良好的吸附性，硫脲为原料的氮化碳具有良好的光催化性能，二硫化钼和氮化碳复合的催化剂对染料的降解能力明显好于氮化碳。硫元素的引入，降低了氮化碳的带隙能，从而增强在可见光区的光吸收，使硫脲为原料的氮化碳材料具有较好的光催化活性。79531

毕业论文关键词：氮化碳  复合材料  光催化  吸附

毕业设计说明书外文摘要

Title The synthesis of g-C3N4/MoS2  hybrids and its high photocatalytic activity under visible light irradiation

Abstract Carbon Nitrideis synthesized by heat polymerization,in which cyanide diamine, urea, melamine, and thiourea are used as starting materials, respectively。 Then as-prepared C3N4 samples are heated time and again to acquire thermal spalling carbon nitride。 A facile process are developed tosynthesizeMoS2/C3N4 hybrids by coprecipitation method, in which sodium sulfide nine hydrate is used as sulfur source, ammonium molybdatete trahydrateis used as molybdenum source and as-prepared carbon nitride materials are used as supporter。 The samples were systematically investigated by XRD, Raman and TEM。 Moreover, the usual contaminant methylene blue (MB) and rhodamine B are selected as the model compound to investigate the adsorption properties and photocatalytic performance of as-obtained samples。 The results shows that the carbon nitride started from urea has good adsorption and that started from thiourea has good photocatalytic performance。 MoS2 and carbon nitride composite catalyst has much better photocatalytic activity than that of carbon nitride。 The introduction of sulfur can reduce the band gap of carbon nitride and improve the photocatalytic activity。

Keywords C3N4  composite material  photocatalytic  adsorption

目录

1。绪论 1

1。1半导体光催化 1

1。2二硫化钼 2

1。3石墨相氮化碳 2

1。4本文工作的主要内容 3

2。石墨相氮化碳与二硫化钼/氮化碳的合成与表征 4

2。1引言 4

2。2实验部分 5

2。2。1石墨相氮化碳的制备 5

2。2。2二硫化钼/氮化碳的制备 6

2。3 实验结果的表征与分析 7

2。4 本章小结 12

3。 氮化碳与二元二硫化钼/氮化碳性能研究实验 13

3。1引言 13

3。2 光催化反应动力学的确定 13

3。3实验部分 14

3。3。1 降解亚甲基蓝实验步骤 15

3。3。2 实验结果与讨论 16

3。3。3降解罗丹明B实验步骤 18

3。3。4实验结果与讨论