Low temperature preparation and visible light photocatalytic activity of mesoporous carbon-doped crystalline TiO2

Ren, Wenjie; Ai, Zhihui; Jia, Falong; Zhang, Lizhi; Fan, Xiaoxing; Zou, Zhigang

doi:10.1016/j.apcatb.2006.06.015

Cited by 922 publications

(436 citation statements)

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“…It was found that TiO 2 modification by non-metals such as carbon (3) causes light absorption in the visible region. For this purpose different inorganic and organic carbon precursors were used (4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21). Wide range of used precursors make it possible to widen TiO 2 activation range of irradiation to visible region.…”

Section: Introductionmentioning

confidence: 99%

Modification of Titanium Dioxide with Graphitic Carbon from Anthracene Thermal Decomposition as a Promising Method for Visible- Active Photocatalysts Preparation

Kusiak-Nejman

Wanag

Kowalczyk

et al. 2016

Journal of Advanced Oxidation Technologies

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Abstract:This work investigated the photocatalytic performance of TiO 2 photocatalysts modified with graphitic carbon under visible light with a very small component of UV. The graphitic carbon modification was conducted at 200-500 °C using thermal anthracene decomposition. The increase of calcination temperature leads to typical increase of crystallites size, decrease of the specific surface area and carbon content in modified samples. The characteristic peak for a skeletal in-plane vibrations of the anthracene ring located at 1522 cm -1 as well as the band at 1410 cm -1 assigned to C=C aromatic stretching vibrations mode were possible to observe. The analysis of the morphology using SEM confirmed the presence on new multi-layer carbonaceous flakes decorated with TiO 2 nanoparticles. TEM analysis and Raman studies proved the presence of graphitic structures covering the surface of the prepared TiO 2 /C photocatalysts. The highest photocatalytic activity, calculated on the basis of phenol photodegradation under visible light, was found for the photocatalyst modified with graphitic carbon at 400 °C (TiO 2 /C-400).

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Section: Introductionmentioning

confidence: 99%

Modification of Titanium Dioxide with Graphitic Carbon from Anthracene Thermal Decomposition as a Promising Method for Visible- Active Photocatalysts Preparation

Kusiak-Nejman

Wanag

Kowalczyk

et al. 2016

Journal of Advanced Oxidation Technologies

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“…For this purpose many of the carbon precursors can be used, such as: n-hexane (2-4), poly(vinyl alcohol) or poly(ethylene terephthalate) (5-9), citric acid (10), cellulose (11)(12), glucose (13), sucrose (14)(15), poly(divinylbenzene) (16) and formaldehyde polymers (17)(18)(19)(20). Commonly used method to introduce carbon into TiO 2 lattice is thermal treatment.…”

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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“…The montmorillonite has a cation-exchange capacity (CEC) of 110 meq/100g and the following structural formula: (Na 0.32 K 0. 12 4 was obtained by using a <2 µm size fraction 17 .…”

Section: Methodsmentioning

confidence: 99%

“…The titanium in a host matrix solid can be used in appropriate applications: for example, photocatalytic properties can be improved by using TiO 2 [2] as a pillar in clay 3 , and visible light photocatalytic activity 4 could be improved by preparing mesoporous carbon-doped TiO 2 . Studies related to titanium-clay were started around 20 year ago by Sterte 5 , thereafter solids were analyzed for catalytic uses: butanol hydroxylation 6 , hydroxylation of phenol 7 , dehydration of pentanol 8 ; decomposition of propanol 9 , selective catalytic reduction of NO by Ti-pillared clays 10,11 .…”

Section: Introductionmentioning

confidence: 99%

Thermal behaviour of titanium in host matrix clay

Volzone

Cesio

2009

Mat. Res.

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The aim of the manuscript was to analyze the structural and textural changes of the titanium in host matrix clay at room temperature and after thermal treatment. Materials and MethodsA montmorillonite supplied by Georgia Kaolin Co. was used in this study and referred to as E. The E sample is a clay mineral with high montmorillonite as clay composition. Quartz and α-cristobalite impurities in low proportions were detected in the sample. The montmorillonite has a cation-exchange capacity (CEC) of 110 meq/100g and the following structural formula: (Na 0.32 Titanium-solutionsThe titanium-solutions (containing partially hydrolyzed titanium cations) were obtained by different methods: a) using a TiCl 4 solution and 6.0 M HCl 5 , where the final Ti concentration was 0.80 M, and the HCl/Ti ratio was 1.22. The solution was aged for 3 hours at 20 °C before use (TiT-solution); b) a TiCl 4 solution was slowly added to absolute alcohol (ethanol), this solution was then added to glycerol (50% v.v -1 in water) following Lin et al. 18 and Bovey et al. 8 . This was named as TiG solution. Preparation of titanium-claysNatural montmorillonite clay (E) and acid treated montmorillonite clay (AE) were used as clays to prepare OH-Ti-clay. The acid activated montmorillonite (AE) was prepared by treating the montmorillonite with a 6 NH 2 SO 4 solution at boiling temperature for 30 minutes with a solid/acid ratio of 5%w.v -1 . The OH-Ti-clays were obtained by adding OH-Ti-solution addition drop wise to a stirred suspension of montmorillonite clay in water. After 4 hours in continuous stirring, the solid was separated by centrifugation, and washed several times with distilled water until being chloride free. The amount of Ti added to the solid was *e-mail: volzcris@netverk.com.ar Thermal Behaviour of Titanium in Host Matrix ClayCristina Volzone*, Ana María Cesio Titanium in hosted by a clay matrix has important applications in a variety of catalysts. However, there is insufficient information about of textural and structural characteristics of the titanium in matrix clay at room temperature and after thermal treatment. In this study, titanium in host matrix clay was obtained by treating montmorillonite clay minerals with different OH-Ti solutions. The titanium-solutions containing partially hydrolyzed titanium were obtained using a TiCl 4 solution with and without the addition of glycerol. The amount of Ti added to the solid was 20 mmol Ti per gram of clay. Thermal treatments were carried out at 500 and 1,000 °C in an air atmosphere. The solids were characterized by X ray diffraction, thermal analyses, infrared spectroscopy, N 2 adsorption-desorption isotherms. The products presented different structural and textural characteristics and, after calcination at 1,000 °C, anatase and rutile in different proportions were present in the samples. Centro de Tecnología de Recursos Minerales y Cerámica (CETMIC)-CIC/ CONICET, La

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Low temperature preparation and visible light photocatalytic activity of mesoporous carbon-doped crystalline TiO2

Cited by 922 publications

References 24 publications

Modification of Titanium Dioxide with Graphitic Carbon from Anthracene Thermal Decomposition as a Promising Method for Visible- Active Photocatalysts Preparation

Modification of Titanium Dioxide with Graphitic Carbon from Anthracene Thermal Decomposition as a Promising Method for Visible- Active Photocatalysts Preparation

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

Thermal behaviour of titanium in host matrix clay

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