Structural and optical properties of TiO2 nanoparticles and their photocatalytic behavior under visible light

被引：7
作者：
Mosquera-Vargas, Edgar [1 ,2 ]
Herrera-Molina, Daniela [1 ,2 ]
Diosa, Jesus E. [1 ,2 ]
机构：
[1] Univ Valle, Fac Ciencias Nat & Exactas, Dept Fis, Cali, Colombia
[2] Univ Valle, Ctr Excelencia Nuevos Mat, Grp Transic Fase & Mat Func, Cali, Colombia
来源：
INGENIERIA Y COMPETITIVIDAD | 2021年 / 23卷 / 02期
关键词：
Photocatalytic; Sol-gel synthesis; Structural and optical properties; TiO2; nanoparticles; METHYL-ORANGE; DEGRADATION; NANOCOMPOSITES; TITANIUM; ANATASE; NANOSTRUCTURES; SYSTEM; RUTILE; DYES;
D O I：
10.25100/iyc.v23i2.10965
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
TiO2 nanoparticles were synthesized using a facile, reproducible, and scalable sol-gel method and their structural and optical properties was studied. XRD ad FTIR was used to identify the phase, crystallite size, and functional groups present in the nanoparticles. The prepared samples crystallize in the anatase structure with a highly crystalline order. TEM/EDX shows that the nanoparticles are pure, spherical, and with an average particle size of 15 +/- 2 nm. The optical band gap energy is around 3.69 +/- 0.10 eV and exhibits blueshift with respect to the bulk anatase. PL emission is attributed to oxygen vacancies (Vo). All samples were photoactive for MO degradation after 240 min of being irradiated with visible light.
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页数：10
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