F-TiO_2微粒制备及其负载纳米Ag_3PO_4颗粒
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摘要
采用水热法制备分层次结构F-TiO_2微粒,并通过原位沉淀方法对这些微粒进行Ag_3PO_4负载以增强其可见光响应,研究F-TiO_2微粒的可见光催化性能(光降解罗丹明B溶液的速率),并研究了复合物中Ag_3PO_4的加入量对光催化活性的影响。结果表明,F-TiO_2微粒的光催化活性在负载Ag_3PO_4以后显著高于纯Ag_3PO_4的活性,当Ag_3PO_4与F-TiO_2的质量比为1∶1.67时,其可见光催化活性最佳。
The hierarchical structural F-TiO_2 particles are prepared by adopting the hydrothermal method,and through the in situ precipitation method,these particles are loaded with Ag_3PO_4 to enhance their visible light response for the study of their visible photocatalytic properties(speed rate of photo-degradation of Rhodamine B solution).The results show that the photocatalytic activity of F-TiO_2 particles after loaded with Ag_3PO_4 is significantly higher than that of pure Ag_3PO_4.When the mass ratio of Ag_3PO_4 to F-TiO_2 is 1:1.67,the photocatalytic activity of the visible light is the best.
The hierarchical structural F-TiO_2 particles are prepared by adopting the hydrothermal method,and through the in situ precipitation method,these particles are loaded with Ag_3PO_4 to enhance their visible light response for the study of their visible photocatalytic properties(speed rate of photo-degradation of Rhodamine B solution).The results show that the photocatalytic activity of F-TiO_2 particles after loaded with Ag_3PO_4 is significantly higher than that of pure Ag_3PO_4.When the mass ratio of Ag_3PO_4 to F-TiO_2 is 1:1.67,the photocatalytic activity of the visible light is the best.
引文
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[6]Tsuji I,Kato H,Kobayashi H,et al.Photocatalytic H2evolution reaction from aqueous solutions over band structure-controlled(AgIn)xZn2(1-x)S2solid solution photocatalysts with visible-light response and their surface nanostructures[J].J Am Chem Soc,2004,126(41):13406-13413.
[7]Yao W,Huang C,Muradov N,et al.A novel Pd-Cr2O3/CdS photocatalyst for solar hydrogen production using a regenerable sacrificial donor[J].J Hydrogen Energy,2011,36:4710-4715.
[8]Romanyuk A,Oelhafen P,Formation and electronic structure of TiO2-Ag interface[J].Solar energy materials and solar cells[J].Sol Energy Mater Sol Cells,2007,91:1051-1054.
[9]Mandal S S,Bhattacharyya A J.Electrochemical sensing and photocatalysis using Ag-TiO2 microwires[J].Journal of Chemical Science,2012,124(5):969-978.
[10]Wang D,Zhou Z,Yang H,et al.Preparation of TiO2loaded with crystalline nano Ag by a one-step low-temperature hydrothermal method[J].J Mater Chem,2012,22:16306-16311.
[11]Linic S,Christopher P,Ingram D B,et al.Plasmonic-metal nanostructures for efficient conversion of solar to chemical energy[J].Nature Materials,2011,10:911-921.
[12]Awazu K,Fujimaki M,Rockstuhl C,et al.A plasmonic photocatalyst consisting of silver nanoparticles embedded in titanium dioxide[J].J Am Chem Soc,2008,130(5):1676-1680.
[13]Christopher P,Ingram D B,Linic S,Enhancing photochemical activity of semiconductor nanoparticles with optically active Ag nanostructures:photochemistry mediated by Ag surface plasmons[J].J Phys Chem C,2010,114(19):9173-9177.
[14]Tian Y,Tatsuma T.Mechanisms and applications of plasmon-induced charge separation at TiO2films loaded with gold nanoparticles[J].J Am Chem Soc,2005,127(20):7632-7637.
[15]Yang L X,Duan W Y,Jiang H M,et al.Mesoporous TiO2@Ag3PO4photocatalyst with high adsorbility and enhanced photocatalytic activity under visible light[J].Materials Research Bulletin,2015,70:129-136.
[16]Hurum D C,Agrios G A,Gray K A,et al.Explaining the enhanced photocatalytic activity of Degussa P25 mixed-phase TiO2using EPR[J].Journal of Physical Chemistry B,2003,107(19):4545-4549.
[17]Yi Z,Ye J,Kikugawa N,et al.An orthophosphate semiconductor with photooxidation properties under visible-light irradiation[J].Nature Materials,2010,9(7):559-564.
[18]Dong P,Wang Y,Li H,et al.Shape-controllable synthesis and morphology-dependent photocatalytic properties of Ag3PO4crystals[J].J Mater Chem A,2013,1:4651-4656.