石墨相碳化氮复合材料的制备及其可见光光催化性能的研究
发布时间：2018-07-15 09:02
【摘要】：目的提高半导体石墨相氮化碳(g-C_3N_4)的光催化性能。方法通过Hummers法和半封闭一步热裂解法制备了氧化石墨烯(GO)和g-C_3N_4,再分别利用溶剂热法、热缩聚法和浸渍化学还原法制得相应的TiO_2/g-C_3N_4、ZnO/g-C_3N_4、RGO/g-C_3N_4复合材料。采用X-射线衍射(XRD)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)、紫外-可见漫反射吸收光谱(UV-Vis DRS)和傅里叶变换红外光谱(FT-IR)等手段对复合材料进行表征,并以降解罗丹明B(Rh B)来评价其在可见光下的光催化性能。结果以尿素与三聚氰胺的混合物为原料通过热裂解法制备的g-C_3N_4,比使用纯尿素制备的g-C_3N_4具有更优的催化效果。TiO_2、ZnO、RGO的引入提高了g-C_3N_4的光催化活性,Rh B的降解率分别为95.6%、95.0%、78.1%。RGO质量分数为2.0%时,RGO/g-C_3N_4复合材料的催化效率最高。结论通过g-C_3N_4特殊的能带调控优势与TiO_2、ZnO、RGO的协同作用,提高了复合材料在可见光区的吸收强度和电子传导能力,进而提高了在可见光下的光催化性能。
[Abstract]:Aim to improve the photocatalytic activity of g-C _ 3 N _ 4 in semiconductor graphite phase. Methods the graphene oxide (go) and g-C _ 3N _ 4 were prepared by Hummers method and semi-closed one-step pyrolysis method. The corresponding TiO-2 / g-C _ 3N _ 3N _ 3N _ 4 composite was prepared by solvothermal method, thermal condensation method and impregnation chemical reduction method, respectively. The composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), UV-Vis DRS and Fourier transform infrared spectroscopy (FT-IR). The photocatalytic activity of Rhodamine B (Rh B) in visible light was evaluated by degradation of Rhodamine B (Rh B). Results g-C _ 3N _ 4 prepared by pyrolysis method using mixture of urea and melamine as raw material has a better catalytic effect than g-C _ 3N _ 4 prepared with pure urea. The introduction of tio _ 2ZnOO _ (RGO) can improve the photocatalytic activity of g-C _ 3N _ 4. The degradation rate of Rh B of g-C _ 3N _ 4 is 95.6% 78.1%. When the mass fraction is 2.0, the catalytic efficiency of RGO / g-C _ 3N _ 4 composite is the highest. Conclusion the special energy band control advantage of g-C _ 3N _ 4 and the synergistic effect of TiOC _ 2ZN _ O _ (RGO) can improve the absorption strength and electron conductivity of the composites in the visible light region, and then improve the photocatalytic performance of the composites under visible light.
【作者单位】： 滨州学院化学工程系;山东省工业污水资源化工程技术研究中心;长春工业大学化工学院;
【基金】：国家自然科学基金(21507006&21476171) 山东省自然科学基金(2015BSB01162) 滨州市科技发展计划项目(2013ZC1602) 滨州学院基金项目(BZXYFB20120603,BZXYZZJJ201403,2013Y08&2013ZDL03)~~
【分类号】：O643.36
，
本文编号：2123538
[Abstract]:Aim to improve the photocatalytic activity of g-C _ 3 N _ 4 in semiconductor graphite phase. Methods the graphene oxide (go) and g-C _ 3N _ 4 were prepared by Hummers method and semi-closed one-step pyrolysis method. The corresponding TiO-2 / g-C _ 3N _ 3N _ 3N _ 4 composite was prepared by solvothermal method, thermal condensation method and impregnation chemical reduction method, respectively. The composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), UV-Vis DRS and Fourier transform infrared spectroscopy (FT-IR). The photocatalytic activity of Rhodamine B (Rh B) in visible light was evaluated by degradation of Rhodamine B (Rh B). Results g-C _ 3N _ 4 prepared by pyrolysis method using mixture of urea and melamine as raw material has a better catalytic effect than g-C _ 3N _ 4 prepared with pure urea. The introduction of tio _ 2ZnOO _ (RGO) can improve the photocatalytic activity of g-C _ 3N _ 4. The degradation rate of Rh B of g-C _ 3N _ 4 is 95.6% 78.1%. When the mass fraction is 2.0, the catalytic efficiency of RGO / g-C _ 3N _ 4 composite is the highest. Conclusion the special energy band control advantage of g-C _ 3N _ 4 and the synergistic effect of TiOC _ 2ZN _ O _ (RGO) can improve the absorption strength and electron conductivity of the composites in the visible light region, and then improve the photocatalytic performance of the composites under visible light.
【作者单位】： 滨州学院化学工程系;山东省工业污水资源化工程技术研究中心;长春工业大学化工学院;
【基金】：国家自然科学基金(21507006&21476171) 山东省自然科学基金(2015BSB01162) 滨州市科技发展计划项目(2013ZC1602) 滨州学院基金项目(BZXYFB20120603,BZXYZZJJ201403,2013Y08&2013ZDL03)~~
【分类号】：O643.36
，
本文编号：2123538
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