Ag3PO4/reduced graphite oxide sheets nanocomposites with highly enhanced visible light photocatalytic activity and stability
Ag3PO4/reduced graphite oxide sheets nanocomposites with highly enhanced visible light photocatalytic activity and stability
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DOI：
10.1016/j.apcatb.2012.11.022
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发表时间：
2013-03-27
影响因子：
22.1
通讯作者：
Li, Fenghua
中科院分区：
文献类型：
--
作者：
Dong, Pengyu;Wang, Yuhua;Li, Fenghua
在 N,N-二甲基甲酰胺 (DMF) 溶剂中，通过简便的化学沉淀方法制备了一系列 Ag3PO4 和还原石墨氧化物片 (RGO) 纳米复合材料，无需任何硬/软模板。通过 X 射线衍射图谱 (XRD)、傅里叶变换红外光谱 (FTIR)、拉曼光谱、场发射扫描电子显微镜 (SEM)、透射电子显微镜 (TEM) 和紫外-可见 (UV-vis) 漫反射光谱 (DRS) 对所制备的 Ag3PO4/RGOs 复合材料进行了表征。研究发现纳米级 Ag3PO4 颗粒沉积在 RGO 表面。 Ag3PO4/RGOs纳米复合材料在可见光照射下对有机甲基橙（MO）和亚甲基蓝（MB）的光降解表现出增强的光催化活性。 Ag3PO4/2.1 wt% RGOs 纳米复合材料对 MO 和 MB 的降解率分别是纯 Ag3PO4 纳米粒子的 3 倍和 2 倍。此外，Ag3PO4的光催化和结构稳定性也大大增强。建议RGOs可以作为保护涂层来部分抑制Ag3PO4的光腐蚀。总的来说，这项工作不仅可以为提高光催化活性而且可以提高光腐蚀催化剂的稳定性提供新的方法。 (c) 2012 Elsevier B.V. 保留所有权利。
A series of Ag3PO4 and reduced graphite oxide sheets (RGOs) nanocomposites have been fabricated by a facile chemical precipitation approach in N,N-dimethylformamide (DMF) solvent without any hard/soft templates. The as-prepared Ag3PO4/RGOs composites were characterized by X-ray diffraction pattern (XRD), Fourier transform infrared spectra (FTIR), Raman spectroscopy, field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), and ultraviolet-visible (UV-vis) diffuse reflectance spectroscopy (DRS). It is found that the nano-sized Ag3PO4 particles are deposited on the surfaces of RGOs. The Ag3PO4/RGOs nanocomposites exhibit enhanced photocatalytic activity for the photodegradation of organic methyl orange (MO) and methylene blue (MB) under visible light irradiation. The photocatalytic rate of Ag3PO4/2.1 wt% RGOs nanocomposite is 3 and 2 times of that of pure Ag3PO4 nanoparticles for the degradation of MO and MB, respectively. Furthermore, the photocatalytic and structural stability of Ag3PO4 is greatly enhanced. It is suggested that RGOs can be used as protective coatings that partially inhibit the photocorrosion of Ag3PO4. Overall, this work could provide a new approach to the improvement not only in the photocatalytic activity but also the stability of photocorrosion catalysts. (c) 2012 Elsevier B.V. All rights reserved.