Wu Yeqiu, He Tao
Department of Building Engineering, Shanxi Datong University, Datong 037003, China.
Wenzhou Vocational and Technical College, Wenzhou 325003, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2018 Jun 15;199:283-289. doi: 10.1016/j.saa.2018.03.078. Epub 2018 Mar 29.
The synthesis and photocatalytic activities of Ag-SrTiO nanofibers were reported in this work. The fabricated Ag-SrTiO nanofibers were characterized by TG-DSC, XRD, IR, XPS, SEM, TEM, DRS and ESR techniques. The XRD and IR results show that Ag-SrTiO nanofibers have a perovskite structure after the heat treatment at 700°C. The XPS result shows that Ag element exists as Ag in the fabricated Ag-SrTiO nanofibers. The SEM and TEM images indicate the obtaining of nanofibers with porous structure. The photocatalytic activity of Ag-SrTiO nanofibers was evaluated by degrading RhB and MB under visible light irradiation. The Ag-SrTiO nanofibers show excellent photocatalytic activity under visible light irradiation because of the surface plasmon resonance effect of Ag. In the photocatalysis process of RhB and MB, lots of hydroxyl radicals were generated, which plays the key role in the decomposition of organic pollutants.
本工作报道了Ag-SrTiO纳米纤维的合成及其光催化活性。通过TG-DSC、XRD、IR、XPS、SEM、TEM、DRS和ESR技术对制备的Ag-SrTiO纳米纤维进行了表征。XRD和IR结果表明，Ag-SrTiO纳米纤维在700°C热处理后具有钙钛矿结构。XPS结果表明，在制备的Ag-SrTiO纳米纤维中，Ag元素以Ag的形式存在。SEM和TEM图像表明获得了具有多孔结构的纳米纤维。通过在可见光照射下降解RhB和MB来评价Ag-SrTiO纳米纤维的光催化活性。由于Ag的表面等离子体共振效应，Ag-SrTiO纳米纤维在可见光照射下表现出优异的光催化活性。在RhB和MB的光催化过程中，产生了大量的羟基自由基，这在有机污染物的分解中起关键作用。
