Fabrication of Ag-decorated CaTiO3 nanoparticles and their enhanced photocatalytic activity for dye degradation

doi:10.1166/jnn.2016.10668

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	Fabrication of Ag-decorated CaTiO3 nanoparticles and their enhanced photocatalytic activity for dye degradation
	Xian, T.1,2; Yang, H.1,2; Huo, Y.S.1; Ma, J.Y.2; Zhang, H.M.1; Su, J.Y.1; Feng, W.J.1
刊名	Journal of Nanoscience and Nanotechnology
	2016
卷号	16 期号:1 页码:570-575
关键词	Azo dyes Complexation Free radicals Irradiation Metal nanoparticles Perovskite Photocatalysis Photocatalytic activity Silver nanoparticles Synthesis (chemical) Hydroxyl radicals Photocatalytic efficiency Photochemical reduction methods Photogenerated electrons Photogenerated holes Polyacrylamide gel routes Terephthalic acids Ultraviolet irradiations
ISSN号	15334880
DOI	10.1166/jnn.2016.10668
英文摘要	CaTiO3 nanoparticles of 30-40 nm in size were synthesized via a polyacrylamide gel route. Ag nanoparticles with size of 8-16 nm were deposited onto CaTiO3 particles by a photochemical reduction method to yield CaTiO3@Ag composites. The photocatalytic activity of prepared samples was evaluated by degrading methyl orange under ultraviolet irradiation. It is demonstrated that Ag-decorated CaTiO3 particles exhibit an enhanced photocatalytic activity compared to bare CaTiO3 particles. After 60 min of photocatalysis, the degradation percentage of MO increases from 54% for bare CaTiO3 particles to 72% for CaTiO3@Ag composites. This can be explained by the fact that photogenerated electrons are captured by Ag nanoparticles and photogenerated holes are therefore increasingly available to react with OH-/H2O to generate hydroxyl (•OH) radicals. •OH radicals were detected by fluorimetry using terephthalic acid as a probe molecule, revealing an enhanced yield on the irradiated CaTiO3@Ag composites. In addition, it is found that the addition of ethanol, which acts as an •OH scavenger, leads to a quenching of •OH radicals and simultaneous decrease in the photocatalytic efficiency. This suggests that •OH radicals are the dominant active species responsible for the dye degradation.
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	American Scientific Publishers
WOS记录号	WOS:000369680400060
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/112546]
专题	理学院材料科学与工程学院
作者单位	1.School of Science, Lanzhou University of Technology, Lanzhou; 730050, China 2.State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Xian, T.,Yang, H.,Huo, Y.S.,et al. Fabrication of Ag-decorated CaTiO3 nanoparticles and their enhanced photocatalytic activity for dye degradation[J]. Journal of Nanoscience and Nanotechnology,2016,16(1):570-575.
APA	Xian, T..,Yang, H..,Huo, Y.S..,Ma, J.Y..,Zhang, H.M..,...&Feng, W.J..(2016).Fabrication of Ag-decorated CaTiO3 nanoparticles and their enhanced photocatalytic activity for dye degradation.Journal of Nanoscience and Nanotechnology,16(1),570-575.
MLA	Xian, T.,et al."Fabrication of Ag-decorated CaTiO3 nanoparticles and their enhanced photocatalytic activity for dye degradation".Journal of Nanoscience and Nanotechnology 16.1(2016):570-575.