SnO2-based thin films with excellent photocatalytic performance

Kong, Xiangquan; Li, Fang; Qi, Zhong‐Nan; Lei, Qi; Yao, Mingming

doi:10.1007/s10854-017-6459-8

Cited by 10 publications

(8 citation statements)

References 35 publications

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“…21-1276). Compared to the diffraction peaks of pure TiO 2 , those of the Co-B codoped TiO 2 /ZnO are more broad and weak, indicating a small crystal size of this sample [ 3 , 19 ]. According to the Scherrer equation: D = 0.89λ/βcosθ, the average crystallite sizes of pure TiO 2 and Co-B codoped TiO 2 /ZnO are 7 and 3 nm, respectively, indicating that the multi-modification TiO 2 can effectively hinder the increase of the crystallite size.…”

Section: Resultsmentioning

confidence: 99%

“…However, these techniques cannot transfer organic compounds into non-hazardous compounds [ 2 ]. Semiconductor heterogeneous photocatalysis, a new water treatment technology, is considered as an effective environmentally-friendly approach to decrease the concentrations of organic contaminants in various wastewaters [ 3 ]. Among various semiconductors, titanium dioxide is considered to be the most useful photocatalyst due to its physical and chemical stability, photo-corrosion resistance, non-toxicity, convenience of preparation, cost-effective breakdown of harmful organic molecules, etc.…”

Section: Introductionmentioning

confidence: 99%

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Nanocrystalline TiO2 Composite Films for the Photodegradation of Formaldehyde and Oxytetracycline under Visible Light Irradiation

et al. 2017

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In order to effectively photodegradate organic pollutants, ZnO composite and Co-B codoped TiO2 films were successfully deposited on glass substrates via a modified sol-gel method and a controllable dip-coating technique. Combining with UV–Vis diffuse reflectance spectroscopy (DRS) and photoluminescence spectra (PL) analyses, the multi-modification could not only extend the optical response of TiO2 to visible light region but also decrease the recombination rate of electron-hole pairs. XRD results revealed that the multi-modified TiO2 film had an anatase-brookite biphase heterostructure. FE-SEM results indicated that the multi-modified TiO2 film without cracks was composed of smaller round-like nanoparticles compared to pure TiO2. BET surface area results showed that the specific surface area of pure TiO2 and the multi-modified TiO2 sample was 47.8 and 115.8 m2/g, respectively. By degradation of formaldehyde and oxytetracycline, experimental results showed that the multi-modified TiO2 film had excellent photodegradation performance under visible light irradiation.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nanocrystalline TiO2 Composite Films for the Photodegradation of Formaldehyde and Oxytetracycline under Visible Light Irradiation

et al. 2017

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“…The photocatalytic efficiency of the composite thin film was evaluated through the degradation of organic pollutants such as acid naphthol red and formaldehyde. The B/Fe co-doped SnO 2 -ZnO film exhibits the highest photocatalytic activity compared with an undoped or only singly doped SnO 2 thin film [127].…”

Section: Supported Sno 2 Photocatalystsmentioning

confidence: 98%

Supported-Metal Oxide Nanoparticles-Potential Photocatalysts

Tan¹

2021

Photophysics, Photochemical and Substitution Reactions - Recent Advances

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Recently, nanosized metal oxides play an essential role in the photocatalytic system due to their ability to create charge carriers during the light irradiation. Metal oxide nanoparticles display excellent light absorption properties, outstanding charge transport characteristics, which are suitable in the photocatalytic system for the treatment of wastewater. Most of the photocatalysts found in the literature are in the form of powders. Only a few supported photocatalytic systems have been reported. The advantages of supported photocatalysts, such as that they produce a small pressure drop, have good mechanical stability and are easily separated from the reaction medium, make them superior to conventional powder photocatalysts. In this chapter, the definition of supported-metal oxide nanoparticles as the photocatalyst and their synthesis methodology are detailed discussed.

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“…The band gap of the semiconductors can be acquired using the following formula αhν = A(hν − E g ) n/2 , where α, h, ν, A, E g are absorption coefficient, Planck's constant, light frequency, proportional constant, and energy band gap, respectively. The value of n, a constant, is determined by the type of a semiconductor [20]. Therefore, a plot of (αhν) 1/2 versus energy (hν) can be used to determine the band gap energy of the films.…”

Section: Optical Absorptionmentioning

confidence: 99%

“…SnO 2 sol or ZnO sol was prepared through the sol-gel method [12,20]. We added 12.64 g SnCl 2 •2H 2 O to 80 mL of anhydrous ethanol in a beaker.…”

Section: Film Preparationmentioning

confidence: 99%

SnO2 Composite Films for Enhanced Photocatalytic Activities

Han

Peng

et al. 2018

Catalysts

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As a new type of promising semiconductor photocatalyst, SnO2 cannot be widely applied due to its low utilization efficiency to visible light and swift recombination of photogenerated electrons and holes. These drawbacks were effectively overcome by preparing the B/Ag/F tridoped SnO2-ZnO composite films using the simple sol–gel method. The degradation of the methyl green and formaldehyde solutions was used to value the photocatalytic activity of the samples. Photoluminescence (PL) spectra and the UV–Vis absorption spectroscopy results of the samples illustrated that the B/Ag/F tridoped SnO2-ZnO composite film not only improved the lifetime of the charge carriers, but also enhanced their visible light absorption. The X-ray diffraction (XRD) results showed that the crystalline SnO2 was in the structure of rutile. As exhibited in the BET surface area results, the specific surface area of pure SnO2 was 19.9 m2g−1, while that of the B/Ag/F tridoped SnO2-ZnO was 85.3 m2g−1. Compared to pure SnO2, SnO2-ZnO, or the mono- or di-doped SnO2-ZnO films, the B/Ag/F tridoped SnO2-ZnO composite film had the highest photocatalytic activity.

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SnO2-based thin films with excellent photocatalytic performance

Cited by 10 publications

References 35 publications

Nanocrystalline TiO2 Composite Films for the Photodegradation of Formaldehyde and Oxytetracycline under Visible Light Irradiation

Nanocrystalline TiO2 Composite Films for the Photodegradation of Formaldehyde and Oxytetracycline under Visible Light Irradiation

Supported-Metal Oxide Nanoparticles-Potential Photocatalysts

SnO2 Composite Films for Enhanced Photocatalytic Activities

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