Combing the electrispining technology and calcination,the visible-light-response g-C3N4/TiO2 composite fibers were successfully synthesized based on tetrabutyl titanate,polyvinyl pyrrolidone and graphite carbon nitride (g-C3N4).The fibers were characterized by XRD,SEM and UV-visible spectroscopy to analyze the nanostructure and morphology.The results showed that g-C3N4 nanopaticles were equably located on the surface of anatase TiO2 fiber,and the optical absorption bands of the fibers appeared at about 460 nm.Under visible light irradiation,the degradation rate of Rhodamine B though the fibers was 2.26 times compared with TiO2 fibers.
[1] Zhao K,Zhang L Z,Wang J J,et al.Surface structure-dependent molecular oxygen activation of BiOCl single-crystalline nanosheets[J].Journal of the American Chemical Society,2013,135(42):15750-15753.
[2] Liu J,Liu Y,Liu N Y,et al.Metal-free efficient photocatalyst for stable visible water splitting via a two-electron pathway[J].Science,2015,347(6225):970-974.
[3] Yu J G,Low J X,Xiao W,et al.Enhanced photocatalytic CO2-reduction activity of anatase TiO2 by coexposed {001} and {101} facets[J].Journal of the American Chemical Society,2014,136(25):8839-8842.
[4] Wei X B,Shao C L,Li X H,et al.Facilein situ synthesis of plasmonic nanoparticles-decorated g-C3N4/TiO2 heterojunction nanofibers and comparison study of their photosynergistic effects for efficient photocatalytic H2 evolution[J].Nanoscale,2016,8(21):11034-11043.
[5] Dahu B Y L,Wang X H,Li X T.Preparation and photocatalytic efficiency of Fe3O4/TiO2 nanocomposite fibers modified with Ag nanoparticles[J].Chemical Journal of Chinese Universities,2014,35(2):357-361.
[6] Wang X H,Dahu B Y L,Li X T.TiO2 Nanofibers embedded with Au and Fe3O4 nanoparticles for visible-light photocatalysis[J].Journal of Chinese Universities,2015,36(5):976-980.
[7] Naseri A,Samadi M,Pourjavadi A,et al.Graphitic carbon nitride (g-C3N4)-based photocatalysts for solar hydrogen generation:recent advances and future development directions[J].Journal of Materials Chemistry A,2017,5(45):23406-23433.
[8] Ong W J,Tan L L,Chai S P,et al.Heterojunction engineering of graphitic carbon nitride (g-C3N4) via Pt loading with improved daylight-induced photocatalytic reduction of carbon dioxide to methane[J].Dalton T,2014,44(3):1249-1257.
[9] Li K,Huang Z Y,Zeng X Q,et al.Synergetic effect of Ti3+ and oxygen doping on enhancing photoelectrochemical and photocatalytic properties of TiO2/g-C3N4 heterojunctions[J].ACS Applied Materials & Interfaces,2017,9(13):11577.
[10] Qu A L,Xu X M,Xie H L,et al.Effects of calcining temperature on photocatalysis of g-C3N4/TiO2 composites for hydrogen evolution from water[J].Materials Research Bulletin,2016,80:167-176.
[11] Lu L Y,Wang G H,Zou M,et al.Effects of calcining temperature on formation of hierarchical TiO2/g-C3N4 hybrids as an effective Z-scheme heterojunction photocatalyst[J].Applied Surface Science,2018,441(31):1012-1023.
[12] Lu Z,Zeng L,Song W L,et al.In situ synthesis of C-TiO2/g-C3N4 heterojunction nanocomposite as highly visible light active photocatalyst originated from effective interfacial charge transfer[J].Applied Catalysis B:Environmental,2017,202:489-499.
[13] Zhou X S,Jin B,Li L D,et al.A carbon nitride/TiO2 nanotube array heterojunction visible-light photocatalyst:synthesis,characterization,and photoelectrochemical properties[J].Journal of Materials Chemistry,2012,22(34):17900-17905.
[14] Qiu L H,Feng Y,Zhang X F,et al.Facile stir-dried preparation of g-C3N4/TiO2 homogeneous composites with enhanced photocatalytic activity[J].RSC Advances,2017,7(18):10668-106674.
[15] Cai Q F,Shen J C,Feng Y,et al.Template-free preparation and characterization of nanoporous g-C3N4 with enhanced visible photocatalytic activity[J].Journal of Alloys and Compounds,2015,628(15):372-378.
[16] Dharani P K,Shankar M V,Mamatja K M,et al.Nano-size effects on CuO/TiO2 catalysts for highly efficient H2 production under solar light irradiation[J].Chemical Communications,2013,49(82):9443-9445.
[17] Pan X,Zhao Y,Liu S,et al.Comparing graphene-TiO2 nanowire and graphene-TiO2 nanoparticle composite photocatalysts[J].ACS Applied Materials & Interfaces,2012,4(8):3944-3950.
[18] Zhou J W,Zhang M,Zhu Y F.Photocatalytic enhancement of hybrid C3N4/TiO2 prepared via ball milling method[J].Phys Chem Chem Phys,2015,17(5):3647-52.
[19] Xie L F,Ni J,Tang B,et al.A self-assembled 2D/2D-type protonated carbon nitride-modified graphene oxide nanocom-posite with improved photocatalytic activity[J].Applied Surface Science,2018,434(15):456-463.
基金资助
国家自然科学青年基金项目(21501102)
PDF
