Fabrication and Photocatalytic Activity of Ag3PO4-TiO2 Heterostructural Nanotube Arrays
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2016年第2期
论文作者：貊艳平 陈峰 YANG Yunyun SONG Jia XU Qiong 徐瑛
文章页码：236 - 241
摘 要：To extend the absorption capability of TiO2 into visible light region and inhibit the recombination of photogenerated electrons and holes,we put forward an effective strategy of the coupling of TiO2 with a suitable semiconductor that possesses a narrow band gap.Meanwhile,Ag3PO4-TiO2 heterostructuralnanotube arrays were prepared by the two-step anodic oxidation to obtain the TiO2 nanotube arrays and then by a deposition-precipitation method to load Ag3PO4.The samples were characterized by field emission scanning electron microscopy（FESEM）,energy dispersive spectrometry（EDS）,X-ray diffraction（XRD）,and UV-vis diffuse reflectance spectroscopy（UV-vis DRS）.The experimentalresults showed that Ag3PO4 nanoparticles were uniformly dispersed on the highly ordered TiO2 nanotube arrays,which increased the visible-light absorption of TiO2 photocatalyst.The photocurrent density and photocatalytic degradation of methylorange indicated that the performance of Ag3PO4-TiO2 heterostructuralnanotube arrays was better than that of the TiO2 nanotube arrays,which could be attributed to the effective electron-hole separation and the improved utilization of visible light.
貊艳平，陈峰，YANG Yunyun，SONG Jia，XU Qiong，徐瑛
Department of Chemistry,School of Chemistry,Chemical Engineering & Life Sciences,Wuhan University of Technology
摘 要：To extend the absorption capability of TiO2 into visible light region and inhibit the recombination of photogenerated electrons and holes,we put forward an effective strategy of the coupling of TiO2 with a suitable semiconductor that possesses a narrow band gap.Meanwhile,Ag3PO4-TiO2 heterostructuralnanotube arrays were prepared by the two-step anodic oxidation to obtain the TiO2 nanotube arrays and then by a deposition-precipitation method to load Ag3PO4.The samples were characterized by field emission scanning electron microscopy（FESEM）,energy dispersive spectrometry（EDS）,X-ray diffraction（XRD）,and UV-vis diffuse reflectance spectroscopy（UV-vis DRS）.The experimentalresults showed that Ag3PO4 nanoparticles were uniformly dispersed on the highly ordered TiO2 nanotube arrays,which increased the visible-light absorption of TiO2 photocatalyst.The photocurrent density and photocatalytic degradation of methylorange indicated that the performance of Ag3PO4-TiO2 heterostructuralnanotube arrays was better than that of the TiO2 nanotube arrays,which could be attributed to the effective electron-hole separation and the improved utilization of visible light.
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