【摘要】：目的提高半導(dǎo)體石墨相氮化碳(g-C_3N_4)的光催化性能。方法通過(guò)Hummers法和半封閉一步熱裂解法制備了氧化石墨烯(GO)和g-C_3N_4,再分別利用溶劑熱法、熱縮聚法和浸漬化學(xué)還原法制得相應(yīng)的TiO_2/g-C_3N_4、ZnO/g-C_3N_4、RGO/g-C_3N_4復(fù)合材料。采用X-射線衍射(XRD)、掃描電子顯微鏡(SEM)、X射線光電子能譜(XPS)、紫外-可見(jiàn)漫反射吸收光譜(UV-Vis DRS)和傅里葉變換紅外光譜(FT-IR)等手段對(duì)復(fù)合材料進(jìn)行表征,并以降解羅丹明B(Rh B)來(lái)評(píng)價(jià)其在可見(jiàn)光下的光催化性能。結(jié)果以尿素與三聚氰胺的混合物為原料通過(guò)熱裂解法制備的g-C_3N_4,比使用純尿素制備的g-C_3N_4具有更優(yōu)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的降解率分別為95.6%、95.0%、78.1%。RGO質(zhì)量分?jǐn)?shù)為2.0%時(shí),RGO/g-C_3N_4復(fù)合材料的催化效率最高。結(jié)論通過(guò)g-C_3N_4特殊的能帶調(diào)控優(yōu)勢(shì)與TiO_2、ZnO、RGO的協(xié)同作用,提高了復(fù)合材料在可見(jiàn)光區(qū)的吸收強(qiáng)度和電子傳導(dǎo)能力,進(jìn)而提高了在可見(jiàn)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.
【作者單位】： 濱州學(xué)院化學(xué)工程系;山東省工業(yè)污水資源化工程技術(shù)研究中心;長(zhǎng)春工業(yè)大學(xué)化工學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(21507006&21476171) 山東省自然科學(xué)基金(2015BSB01162) 濱州市科技發(fā)展計(jì)劃項(xiàng)目(2013ZC1602) 濱州學(xué)院基金項(xiàng)目(BZXYFB20120603,BZXYZZJJ201403,2013Y08&2013ZDL03)~~
【分類號(hào)】：O643.36
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本文編號(hào)：2123538