离子交换法制备Ag/Ag1.69Sb2.27O6.25光催化纳米粉末的表征与光催化性能

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Abstract Ag/Ag_1.69Sb_2.27O_6.25 photocatalytic nano-powders were synthesized by ion exchange method using K₂H₂Sb₂O₇·4H₂O and AgNO₃ as raw materials. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet diffuse reflectance and ultraviolet-visible-spectrophotometer were used to analyze and test the phase, morphology, structure and optical properties of the nano-powders obtained at different calcination temperatures. The photocatalytic properties of the nano-powders were measured by photodegradation experiments of tetracycline hydrochloride (TC-HCl) under visible light. The results show that the diameter of Ag/Ag_1.69Sb_2.27O_6.25 particles is about 100-150 nm, and the surface of Ag_1.69Sb_2.27O_6.25 is coated with spherical Ag particles with a size of 10 nm. With the increase of calcination temperature, the depression of Ag/ Ag_1.69Sb_2.27O_6.25 nanoparticles becomes smaller, and the powder color changes from gray to yellow. The photocatalytic activity of Ag/ Ag_1.69Sb_2.27O_6.25 nano-materials prepared at 250 ℃ is the highest, which is 7 times higher than that of the materials (Ag/ASO-250) prepared at 900 ℃. Moreover, the percentage of TC-HCl degradation by AgSbO₃-ssr, N-TiO₂ and Ag/ASO-250 is 65%, 77%, and 90% respectively when the photocatalytic degradation reaction lasts 90 minutes. This indicates that Ag/ASO-250 has strong photocatalytic activity compared with AgSbO₃-ssr and N-TiO₂.

Key words： silver antimonite silver photocatalysis calcination tetracycline hydrochloride surface rlasmon resonance metal loading

Received: 18 April 2019 Published: 14 November 2019

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	ZHENG Zhihe
	HUNG Linjun
	ZHANG Ning

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ZHENG Zhihe,HUNG Linjun,ZHANG Ning. Characterization and photocatalytic properties of Ag/Ag_1.69Sb_2.27O_6.25 photocatalytic nano-powder synthesized by ion exchange method[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(5): 452-458.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2019/V24/I5/452

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