g-C3N4/BiOI/Ag3PO4复合光催化剂的制备表征
毕业论文关键词：g-C3N4；BiOI；Ag3PO4；复合光催化剂；染料降解
Abstract Photocatalytic technology can completely efficiently degrade the dyes and other pollutants in the organic wastewater at room temperature and atmospheric pressure。 In this paper, we studied the photocatalytic properties of the new composite photocatalyst g-C3N4/BiOI/Ag3PO4 under visible light。 We characterized the crystal structure, surface morphology and optical absorption properties of the related photocatalyst by X ray diffraction (XRD), scanning electron microscopy (SEM) and UV VIS spectrophotometer。 Then we studied light degradation behavior of the prepared photocatalyst under visible light with Rhodamine B (RhB), methyl blue (MB) and methyl orange (MO)。 The results show that compared with the original photocatalyst g-C3N4, composite photocatalyst g-C3N4/BiOI/Ag3PO4 not only enhances the catalytic activity, but also has a high efficient stable catalytic activity。 This research provides a new idea for the design and development of heterojunction composite nano materials which can greatly improve the utilization of solar energy。
Keywords: g-C3N4；BiOI；Ag3PO4；Composite photocatalyst；Dye degradation
目 录
第一章 绪论 1
1。1光催化剂的研究背景及意义 1
1。2石墨烯型氮化碳g-C3N4材料的结构、性质和制备 3
1。2。1石墨烯型氮化碳g-C3N4材料的研究背景 3
1。2。2石墨烯型氮化碳g-C3N4材料的结构 3
1。2。3石墨烯型氮化碳g-C3N4材料的制备方法 4
1。3铋系光催化剂简介 4
1。3。1BiOX(X=Cl,Br,I)材料简介 4
1。3。2BiOX材料的结构与性质 5
1。3。3BiOX材料的制备方法 6
1。3。4BiOX(X=Cl,Br,I)纳米光催化剂的固载技术 7
1。4Ag3PO4光催化剂的催化机理 8
1。5g-C3N4/BiOI复合光催化剂的研究 9
1。5。1引言 9
1。5。2g-C3N4/BiOI复合光催化剂的催化机理 9
1。5。3g-C3N4/BiOI复合光催化剂的制备方法 10
1。6Ag/BiOX（X=Cl,Br,I)/Ag3PO4复合光催化剂的研究 10
1。6。1Ag/AgX/BiOX（X=C1,Br,I)光催化剂的制备及其不同的可见光催化活性增强机理 10
1。6。2g-C3N4/BiOI/Ag3PO4复合光催化剂的制备方法 11
第二章 实验 12
2。1实验原理 12
2。2实验试剂与仪器 12
2。3样品制备 13
2。3。1制备g-C3N4、BiOI、Ag3PO4单体 13
2。3。2制备g-C3N4/BiOI 14
2。3。3制备BiOI/Ag3PO4 14
2。3。4制备g-C3N4/BiOI/Ag3PO4 14
2。4样品表征 15