Abstract Ag/Ag1.69Sb2.27O6.25 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/Ag1.69Sb2.27O6.25 particles is about 100-150 nm, and the surface of Ag1.69Sb2.27O6.25 is coated with spherical Ag particles with a size of 10 nm. With the increase of calcination temperature, the depression of Ag/ Ag1.69Sb2.27O6.25 nanoparticles becomes smaller, and the powder color changes from gray to yellow. The photocatalytic activity of Ag/ Ag1.69Sb2.27O6.25 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.
ZHENG Zhihe,HUNG Linjun,ZHANG Ning. Characterization and photocatalytic properties of Ag/Ag1.69Sb2.27O6.25 photocatalytic nano-powder synthesized by ion exchange method[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(5): 452-458.
[1] PAN X, GAO X, CHEN X, et al.Design synthesis of nitrogen- doped TiO2@carbon nanosheets toward selective nitroaromatics reduction under mild conditions[J]. ACS Catalysis, 2017, 7(10), 6991-6998. [2] KAKO T, KIKUGAWA N, YE J.Photocatalytic activities of AgSbO3 under visible light irradiation[J]. Catalysis Today, 2008, 131(1): 197-202. [3] CHEN D P, BOWERS W, SKRABALAK S E.Aerosol-assisted combustion synthesis of single-crystalline NaSbO3 nanoplates: A topotactic template for Ilmenite AgSbO3[J]. Chemistry of Materials, 2015, 27(1): 174-180. [4] LI F, LI J F.Microstructure and thermoelectric properties of AgSbO3 ceramics prepared by ion-exchange powder synthesis and normal sintering[J]. Journal of Electronic Materials, 2011, 40(5): 1035-1041. [5] LOW J, YU J, JARONIEC M, et al.Heterojunction photocatalysts[J]. Adv Mater, 2017, 29(20): 160-169. [6] ASAHI R, MORIKAWA T, OHWAKI T, et al.Visible-light photocatalysis in nitrogen-doped titanium oxides[J]. Science, 2001, 293(5528): 269-271. [7] DIEBOLD U.The surface science of titanium dioxide[J]. Surface Science Reports, 2003, 48(5): 53-229. [8] SUBRAMANIAN V, WOLF E E, KAMAT P V.Catalysis with TiO2/gold nanocomposites. Effect of metal particle size on the fermi level equilibration[J]. Journal of the American Chemical Society, 2004, 126(15): 4943-4950. [9] ZHOU C, SHANG L, YU H, et al.Mesoporous plasmonic Au-loaded Ta2O5 nanocomposites for efficient visible light photocatalysis[J]. Catalysis Today, 2014, 225: 158-163. [10] HOU W, CRONIN S B.A review of surface plasmon resonance-enhanced photocatalysis[J]. Advanced Functional Materials, 2013, 23(13): 1612-1619. [11] SUN Y, SUN Y, ZHANG T, et al.Complete Au@ZnO core-shell nanoparticles with enhanced plasmonic absorption enabling significantly improved photocatalysis[J]. Nanoscale, 2016, 8(20): 10774-10782. [12] DING D, LIU K, HE S, et al.Ligand-exchange assisted formation of Au/TiO2 Schottky contact for visible-light photocatalysis[J]. Nano Lett, 2014, 14(11): 6731-6736. [13] GONG Y, QUAN X, YU H, et al.Synthesis of Z-scheme Ag2CrO4/Ag/g-C3N4 composite with enhanced visible-light photocatalytic activity for 2,4-dichlorophenol degradation[J]. Applied Catalysis B: Environmental, 2017, 219: 439-449. [14] WANG H, YUAN X, WANG H, et al.Facile synthesis of Sb2S3/ultrathin g-C3N4 sheets heterostructures embedded with g-C3N4 quantum dots with enhanced NIR-light photocatalytic performance[J]. Applied Catalysis B: Environmental, 2016, 193: 36-46. [15] SHANG Y, CHEN X, LIU W, et al.Photocorrosion inhibition and high-efficiency photoactivity of porous g-C3N4/Ag2CrO4 composites by simple microemulsion-assisted co-precipitation method[J]. Applied Catalysis B: Environmental, 2017, 204: 78-88. [16] ZHANG N, CHEN C, MEI Z, et al.Monoclinic tungsten oxide with {100} facet orientation and tuned electronic band structure for enhanced photocatalytic oxidations[J]. ACS Appl Mater Interfaces, 2016(8): 10367-10374. [17] KHAN S U M, AL-AHAHRY M, INGLER W B. Efficient photochemical water splitting by a chemically modified n-TiO2[J]. Science, 2002, 297(5590): 2243-2249.
2019, Vol. 24 
