Fabrication of novel magnetically separable nanocomposites using graphitic carbon nitride, silver phosphate and silver chloride and their applications in photocatalytic removal of different pollutants using visible-light irradiation
Fabrication of novel magnetically separable nanocomposites using graphitic carbon nitride, silver phosphate and silver chloride and their applications in photocatalytic removal of different pollutants using visible-light irradiation
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DOI：
10.1016/j.jcis.2016.07.021
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发表时间：
2016-10-15
影响因子：
9.9
通讯作者：
Abitorabi, Masoud
中科院分区：
文献类型：
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作者：
Mousavi, Mitra;Habibi-Yangjeh, Aziz;Abitorabi, Masoud
在本研究中，采用超声辐照法成功制备了在可见光下具有高效光催化活性的g-C3N4/Fe3O4/Ag3PO4/AgCl纳米复合材料。采用XRD、EDX、AAS、SEM、TEM、UV-vis DRS、FT-IR、TG、PL、VSM等技术对制备的样品进行表征。选取罗丹明B、甲基橙、品红和苯酚作为污染物，对制备的样品进行光催化活性评价。其中，g-C3N4/Fe3O4/Ag3PO4/AgCl（30%）纳米复合材料的光催化活性最高。结果表明，该纳米复合材料对罗丹明B的降解活性分别比g-C3N4、g-C3N4/Fe3O4/Ag3PO4（20%）和g-C3N4/Fe3O4/AgCl（30%）样品高近22倍、6倍和7.5倍。该纳米复合材料具有显著的饱和磁化强度（8.78emu g(-1)），表明在磁场作用下光催化剂可以很容易地从处理过的溶液中分离出来。通过捕集实验发现，孔洞是主要的活性物质，驱动降解反应。本研究表明，在可见光照射下，第四系纳米复合材料是一种很有前途的降解有机污染物的光催化剂。(C) 2016 Elsevier Inc.版权所有。
In the present study, g-C3N4/Fe3O4/Ag3PO4/AgCl nanocomposites endowed with efficient photocatalytic activity under visible-light irradiation have been successfully prepared by a facile ultrasonic-irradiation method. The prepared samples were characterized by XRD, EDX, AAS, SEM, TEM, UV-vis DRS, FT-IR, TG, PL, and VSM techniques. Rhodamine B, methyl orange, fuchsine, and phenol were selected as pollutants to evaluate photocatalytic activity of the as-prepared samples. Among the samples, the g-C3N4/Fe3O4/Ag3PO4/AgCl (30%) nanocomposite displayed the highest photocatalytic activity. It was found that activity of this nanocomposite in degradation of rhodamine B is nearly 22, 6, and 7.5-times higher than those of the g-C3N4, g-C3N4/Fe3O4/Ag3PO4 (20%), and g-C3N4/Fe3O4/AgCl (30%) samples, respectively. The significant amount of saturation magnetization (8.78emu g(-1))) for this nanocomposite indicated that the photocatalyst can be easily separated from the treated solution using a magnetic field. According to the trapping experiments, it was found that holes are main active species, driving the degradation reaction. This work suggests that the quaternary nanocomposite is promising photocatalyst for degradation of organic pollutants under visible-light illumination. (C) 2016 Elsevier Inc. All rights reserved.