AgI/Ag3PO4 hybrids with highly efficient visible-light driven photocatalytic activity

被引：38

作者：

Katsumata, Hideyuki ^{[1
]}

Hayashi, Takahiro ^{[1
]}

Taniguchi, Masanao ^{[1
]}

Suzuki, Tohru ^{[2
]}

Kaneco, Satoshi ^{[1
,2
]}

机构：

[1] Mie Univ, Grad Sch Engn, Dept Chem Mat, Tsu, Mie 5148507, Japan

[2] Mie Univ, Mie Global Environm Ctr Educ & Res, Tsu, Mie 5148507, Japan

来源：

MATERIALS RESEARCH BULLETIN | 2015年 / 63卷

关键词：

Halides; Semiconductors; Optical properties; Catalytic properties; PLASMONIC PHOTOCATALYST; FACILE SYNTHESIS; AG3PO4; DEGRADATION; MECHANISM; NANOCOMPOSITES; SEMICONDUCTOR; COMPOSITES; STABILITY; MICROCRYSTALS;

D O I：

10.1016/j.materresbull.2014.11.040

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Highly efficient visible-light-driven AgI/Ag3PO4 hybrid photocatalysts with different mole ratios of AgI were prepared via an in situ anion-exchange method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis diffuse reflectance spectroscopy (DRS) and photo-luminescence (PL) technique. Under visible light irradiation (>420 nm), the AgI/Ag3PO4 photocatalysts displayed the higher photocatalytic activity than pure Ag3PO4 and AgI for the decolorization of acid orange 7 (AO 7). Among the hybrid photocatalysts, AgI/Ag3PO4 with 80% of AgI exhibited the highest photocatalytic activity for the decolorization of AO 7. X-ray photoelectron spectroscopy (XPS) results revealed that AgI/Ag3PO4 readily transformed to be Ag@AgI/Ag3PO4 system while the photocatalytic activity of AgI/Ag3PO4 remained after 5 recycling runs. In addition, the quenching effects of different scavengers displayed that the reactive h(+) and O-2(center dot-) play the major role in the AO 7 decolorization. The photocatalytic activity enhancement of AgI/Ag3PO4 hybrids can be ascribed to the efficient separation of electron-hole pairs through a Z-scheme system composed of Ag3PO4, Ag and AgI, in which Ag nanoparticles act as the charge separation center. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：116 / 122

页数：7

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