Preparation and Characterization of Visible-Light-Driven Carbon−Sulfur-Codoped TiO2 Photocatalysts

Sun, Hongqi; Bai, Yuan; Cheng, Youping; Jin, Wanqin; Xu, Nanping

doi:10.1021/ie060350f

Cited by 201 publications

(146 citation statements)

References 21 publications

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“…The experimental results showed that up to 70% of NO x could be oxidized in a continuous flow type reaction system under irradiation with visible light. Other researchers modified TiO 2 by calcinations of hydrolysis product from Ti precursors and heat treatment with urea and thiourea (36)(37)(38) or tetrabutylammonium hydroxide (39)(40)(41)(42). These studies showed that carbon addition to TiO 2 lowered the band gap and make them active under irradiation with visible light.…”

Section: Introductionmentioning

confidence: 99%

The Photocatalytic Performance of Benzene- Modified TiO2 Photocatalysts under UV-vis Light Irradiation

Kusiak-Nejman¹,

Wanag²,

Kowalczyk³

et al. 2015

Journal of Advanced Oxidation Technologies

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Abstract:In this study a photocatalytic performance of new carbon-modified titanium dioxide photocatalysts was discussed. Benzene was used as carbon precursor. It was found that the photocatalytic activity of obtained samples increases with the increase of modification temperature and decrease of carbon concentration present in TiO 2 /C samples. This could be related to the kind of interactions between TiO 2 surface and carbon from thermal decomposition of benzene. The higher calcination temperature the less carbon deposits on the surface of modified samples and the higher probability of the Ti and C interaction confirmed by means of UV-vis/DR studies. It was proved that the photocatalytic activity of carbon modified titania nanomaterials strongly depends on carbon content in TiO 2 /C photocatalysts. Modification of starting TiO 2 with benzene is a promising method especially by taking into account the mineralization of phenol and the co-products of its degradation.

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Section: Introductionmentioning

confidence: 99%

The Photocatalytic Performance of Benzene- Modified TiO2 Photocatalysts under UV-vis Light Irradiation

Kusiak-Nejman¹,

Wanag²,

Kowalczyk³

et al. 2015

Journal of Advanced Oxidation Technologies

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“…These observations suggest that the lattice structure of TiO 2 is locally distorted by incorporation of dopants, S or Zr ions into TiO 2 . 17,29,37 To clarify the effect of these dopants on the lattice structure of TiO 2 , the lattice parameters of the catalysts were measured using (101) and (200) in anatase crystal planes by using equations 4.1 and 4.2:…”

Section: Resultsmentioning

confidence: 99%

“…The results are summarized in , respectively in TiO 2 , the lattice parameters of c increase relative to that of TiO 2 because of larger ionic radius of dopants. 29,37,39 Therefore, the Zr-TiO 2 -S lattice exists in a strain form with high lattice energy. Consequently, some structural defects such as oxygen vacancies might be generated on the surface of ZrTiO 2 -S.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization, and Application of Zr,S Co-doped TiO₂as Visible-light Active Photocatalyst

Kim¹,

Khan²,

Kim

et al. 2008

Bulletin of the Korean Chemical Society

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A series of Zr,S co-doped TiO 2 were synthesized by a modified sol-gel method and characterized by various spectroscopic and analytical techniques. The presence of sulfur caused a red-shift in the absorption band of TiO 2 . Co-doping of sulfur and zirconium (Zr-TiO 2 -S) improves the surface properties such as surface area, pore volume, and pore diameter and also enhances the thermal stability of the anatase phase. The Zr-TiO 2 -S systems are very effective visible-light active catalysts for the degradation of toluene. All reactions follow pseudo firstorder kinetics with the decomposition rate reaching as high as 77% within 4 h. The catalytic activity decreases in the following order: Zr-TiO 2 -S > TiO 2 -S > Zr-TiO 2 > TiO 2 P-25, demonstrating the synergic effect of codoping with zirconium and sulfur. When the comparison is made within the series of Zr-TiO 2 -S, the catalytic performance is found to be a function of Zr-contents as follows: 3 wt % Zr-TiO 2 -S > 0.5 wt % Zr-TiO 2 -S > 5 wt % Zr-TiO 2 -S > 1 wt % Zr-TiO 2 -S. Higher calcination temperature decreases the reactivity of Zr-TiO 2 -S.

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“…In addition, 88.4% of MB was degraded when using the commercial TiO 2 nanoparticles, while MB was degraded completely when using the core-shell nanospheres. It has been reported that dye impurities were still found when using TiO 2 nanoparticles as a photocatalyst indicating the low photocatalytic activity of the TiO 2 nanoparticles [61] [62] [63]. These results showed that the core-shell nanospheres had high photocatalytic activity compared with the commercial TiO 2 nanoparticles in terms of decolourisation of the binary mixture of MO and MB, so this process could be considered a promising process for removal of harmful dyes from the environment.…”

Section: Comparison With Commercial Tio 2 Nanoparticlesmentioning

confidence: 97%

Photodegradation of Binary Azo Dyes Using Core-Shell Fe3O4/SiO2/TiO2 Nanospheres

Alzahrani¹

2017

AJAC

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Photodegradation has emerged as an environmentally friendly method of decomposing harmful dyes in wastewater. In this study, core-shell Fe 3 O 4 /SiO 2 / TiO 2 nanospheres with magnetic cores were obtained from synthesised magnetic Fe 3 O 4 nanoparticles through the precipitation method, the surface of the magnetic Fe 3 O 4 nanoparticles was coated with a silica (SiO 2 ) layer by hydrolysis of tetramethoxysilane (TMOS) as a silica source, and finally, Fe 3 O 4 /SiO 2 nanospheres were coated with titanium (TiO 2 ) layer using tetrabutyltitanate (TBT) as a precursor through the sol-gel process. The morphology and structure of the prepared materials were characterised by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), X-ray energy dispersive spectrometry (EDAX), Fourier transform infrared spectroscopy (FT-IR), and atomic force microscopy (AFM). The photocatalytic activities of the prepared core-shell nanospheres were studied using binary azo dyes, namely methyl orange (anionic dye, MO) and methylene blue (cationic dye, MB) in aqueous solution under UV light irradiation (365 nm), and UV-Vis spectrophotometer was utilised to monitor the amount of each dye in the mixture. It was found that 90.2% and 100% of binary MO and MB were removed for 5 h, respectively. The results revealed that the efficiency of the photocatalytic degradation of the core-shell nanospheres was not degreased after five runs that can be used as recyclable photocatalysts. The results show that the performance of the prepared core-shell nanospheres was better than that of commercial TiO 2 nanoparticles. Moreover, the magnetic separation properties of the core-shell Fe 3 O 4 /SiO 2 /TiO 2 nanospheres can enable the prepared materials to have wider application prospects.

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Preparation and Characterization of Visible-Light-Driven Carbon−Sulfur-Codoped TiO₂ Photocatalysts

Cited by 201 publications

References 21 publications

The Photocatalytic Performance of Benzene- Modified TiO2 Photocatalysts under UV-vis Light Irradiation

The Photocatalytic Performance of Benzene- Modified TiO2 Photocatalysts under UV-vis Light Irradiation

Synthesis, Characterization, and Application of Zr,S Co-doped TiO₂as Visible-light Active Photocatalyst

Photodegradation of Binary Azo Dyes Using Core-Shell Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/TiO<sub>2</sub> Nanospheres

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Preparation and Characterization of Visible-Light-Driven Carbon−Sulfur-Codoped TiO2 Photocatalysts

Cited by 201 publications

References 21 publications

The Photocatalytic Performance of Benzene- Modified TiO2 Photocatalysts under UV-vis Light Irradiation

The Photocatalytic Performance of Benzene- Modified TiO2 Photocatalysts under UV-vis Light Irradiation

Synthesis, Characterization, and Application of Zr,S Co-doped TiO2as Visible-light Active Photocatalyst

Photodegradation of Binary Azo Dyes Using Core-Shell Fe&lt;sub&gt;3&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt;/SiO&lt;sub&gt;2&lt;/sub&gt;/TiO&lt;sub&gt;2&lt;/sub&gt; Nanospheres

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Preparation and Characterization of Visible-Light-Driven Carbon−Sulfur-Codoped TiO₂ Photocatalysts

Synthesis, Characterization, and Application of Zr,S Co-doped TiO₂as Visible-light Active Photocatalyst

Photodegradation of Binary Azo Dyes Using Core-Shell Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/TiO<sub>2</sub> Nanospheres