A new perspective for effect of S and Cu on the photocatalytic activity of S, Cu-codoped nano-TiO2 under visible light irradiation

• Published in: Journal of sol-gel science and technology Vol. 69; no. 2; pp. 386 - 396
• Main Authors: Yi, Wentao, Yan, Chunyan, Yan, Peng, Li, Faqiang
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01-02-2014; Springer; Springer Nature B.V
• Subjects: ACTIVITY; Catalysis; CATALYSTS; Catalytic activity; Ceramics; Chemistry; Chemistry and Materials Science; Colloidal gels. Colloidal sols; Colloidal state and disperse state; Composites; Copper; Diffuse reflectance spectroscopy; DOPING; Dyes; Exact sciences and technology; Fourier transforms; General and physical chemistry; Glass; Illumination; Infrared analysis; Infrared spectra; Inorganic Chemistry; Light; Light irradiation; Materials Science; MICROSTRUCTURES; Nanoparticles; Nanostructure; Nanotechnology; Natural Materials; Optical and Electronic Materials; Orange II; Original Paper; Oxidation; PARTICLE SIZE AND SHAPE; Photocatalysis; Photochemistry; Photoelectrons; Physical chemistry of induced reactions (with radiations, particles and ultrasonics); RADIATION; Raman spectra; Scanning electron microscopy; Spectral sensitivity; Spectroscopic analysis; Spectrum analysis; Sulfur; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; TITANIUM DIOXIDE; Valence; X ray fluorescence analysis; X RAYS; X-ray diffraction; Photocatalytic activity; AO7; Sol-hydrothermal; Nano particles; Codoped TiO; Particle; Heterogeneous catalysis; Sol gel process; Photocatalysis; Transition element compounds; Titanium oxide; Hydrothermal condition
• ISSN: 0928-0707; 1573-4846
• DOI: 10.1007/s10971-013-3231-2

Sulfur and copper codoped TiO
2
nanoparticles were prepared by sol-hydrothermal process. And the samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectra analysis, scanning electron microscopy, Brunauer Emmett Teller analysis, UV–vis diffuse reflectance spectroscopy, X-ray photoelectron spectra and X-ray fluorescence analysis. It was found that the S, Cu-codoped TiO
2
became amorphous with the increase of Cu content, and copper on the surface of TiO
2
existed in the oxidation state of Cu(II) while S in the form of S
6+
species. And the codoped particles had higher surface area, smaller particle size, stronger spectral response in visible region compared with pure TiO
2
. The effects of doping amount in a wide range, catalyst dosage, and recycle on the photocatalytic activity of the codoped catalysts were investigated with Acid Orange 7 as the model compound under visible light illumination (λ > 447 nm). The results showed that S (2.0 %), Cu (5.0 %) codoped TiO
2
had the highest visible light photocatalytic activity and good reusability performance. The kinetic study showed that this photocatalytic process coincided with the Langmuir–Hinshelwood pseudo first order reaction model.