Preparation of TiO2, Ag-doped TiO2 nanoparticle and TiO2–SBA-15 nanocomposites using simple aqueous solution-based chemical method and study of their photocatalytical activity

Naik, Bhanudas; Manoratne, C.H.; Chandrashekhar, Akash; Iyer, Abhishek; Prasad, Virendra; Ghosh, Narendra Nath

doi:10.1080/17458080.2011.597435

Cited by 17 publications

(11 citation statements)

References 44 publications

(54 reference statements)

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“…The wall thickness calculated from the XRD pattern using the equation (Wt = 2 d (100) /3 1/2 − pore diameter) was found to be 5.70 nm, in agreement with previous reports [ 11 ]. A broad peak at 2 θ = 24° was observed, and it was attributed to the amorphous SiO 2 character [ 14 , 32 ].…”

Section: Resultsmentioning

confidence: 99%

Photo-Catalytic Properties of TiO2 Supported on MWCNTs, SBA-15 and Silica-Coated MWCNTs Nanocomposites

Ramoraswi

Ndungu

2015

Nanoscale Res Lett

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Mesoporous silica, specifically SBA-15, acid-treated multi-walled carbon nanotubes and a hybrid nanocomposite of SBA-15 coated onto the sidewalls acid-treated multi-walled carbon nanotubes (CNTs) were prepared and used as supports for anatase TiO2. Sol-gel methods were adapted for the synthesis of selected supports and for coating the materials with selected wt% loading of titania. Physical and chemical properties of the supports and catalyst composite materials were investigated by powder X-ray diffraction (XRD), Raman spectroscopy, thermogravimetric analysis, scanning electron microscope (SEM), high-resolution transmission electron microscope (HRTEM), UV-vis diffuse reflectance spectroscopy and fluorescence spectroscopy. The photo-activity of the catalyst composites were evaluated on the decolorisation of methylene blue as a model pollutant. Coating CNTs with SBA-15 improved the thermal stability and textural properties of the nanotubes. All supported titania composites had high surface areas (207–301 m2/g), altered band gap energies and reduced TiO2 crystallite sizes. The TiO2/SBA-CNT composite showed enhanced photo-catalytic properties and activity than the TiO2/SBA-15 and TiO2/CNT composites. In addition, an interesting observation was noted with the TiO2/SBA-15 nanocomposites, which had a significantly greater photo-catalytic activity than the TiO2/CNT nanocomposites in spite of the high electron-hole recombination phenomena observed with the photoluminescence results. Discussions in terms of morphological, textural and physical-chemical aspects to account for the result are presented.Electronic supplementary materialThe online version of this article (doi:10.1186/s11671-015-1137-3) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 99%

Photo-Catalytic Properties of TiO2 Supported on MWCNTs, SBA-15 and Silica-Coated MWCNTs Nanocomposites

Ramoraswi

Ndungu

2015

Nanoscale Res Lett

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“…Several methods have been applied for Ag/TiO 2 photocatalysts synthesis with different morphologies, including impregnation, sol-gel, co-precipitation, hydrothermal, photo deposition process, etc. (Naik et al 2013;Harikishore et al 2014;Sarteep et al 2016;Wenderich and Mul 2016;Zhang et al 2016b;Zheng et al 2019;Abbad et al 2020). Each synthesis method has its own advantages and shortcomings in terms of performances and preparation.…”

Section: Ag/tio 2 Photocatalystmentioning

confidence: 99%

Recent progress on Ag/TiO2 photocatalysts: photocatalytic and bactericidal behaviors

Chakhtouna

Benzeid

Zari

et al. 2021

Environ Sci Pollut Res

247

111

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For many decades, titanium dioxide (TiO 2 ) semiconductor has been extensively applied in several environmental applications due to its higher photocatalytic performances toward different organic pollutants, pharmaceutical compounds, and bacteria. However, its shortfall response to visible light, and the expeditious recombination rate of the photogenerated electron-hole pairs, hampers its utilization. Doping TiO 2 semiconductor with silver nanoparticles is a sound strategy to (1) extend its photocatalytic activity to visible light, (2) prevent the electron/holes pairs recombination due to the formation of the Schottky barrier at the interfaces with TiO 2 that act as an electron-trapping center, and (3) enhance its bactericide performances. This review focuses on the recent progress on silver-doped titanium dioxide (Ag/TiO 2 )-based photocatalysts. It addresses a wide range of Ag/TiO 2 synthesis techniques, their physicochemical properties and discusses thoroughly the important role of silver (Ag) nanoparticles in enhancing the removal capacity and antibacterial performances of the Ag/TiO 2 photocatalysts.

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“…The results showed that the TiO 2 -SBA-15 nanocomposites exhibited a high methyl orange removal efficiency of 81 % even at a very low TiO 2 loading of 10 wt %. [136] Guo et al also obtained a similar result when employing the TiO 2 @SBA-15 composites for photocatalytic oxidative desulfurization, reaching a high DBT removal rate of 96.1 % in a reaction time of 90 min. [94] Wang et al used the ZSM-5 material for ultra-deep desulfurization of catalytically cracked gasoline and achieved excellent desulfurization results.…”

Section: Structure Modificationsmentioning

confidence: 62%

“…synthesized TiO 2 ‐SBA‐15 nanocomposites using a simple aqueous solution‐based chemical method. The results showed that the TiO 2 ‐SBA‐15 nanocomposites exhibited a high methyl orange removal efficiency of 81 % even at a very low TiO 2 loading of 10 wt % [136] . Guo et al.…”

Section: Solutions To Podsmentioning

confidence: 97%

Desulfurization through Photocatalytic Oxidation: A Critical Review

et al. 2020

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Fuel oil, the most important strategic resource, has been widely used in industrial applications. However, the sulfur‐containing compounds in fuel oil also present humanity with huge environmental issues and health concerns due to the hazardous combustion waste. To address this problem, the low vulcanization of fuel production technology has been intensively explored. Compared with traditional hydrodesulfurization technology, the newly emerged photocatalytic desulfurization has the advantages of milder operating conditions, lower energy consumption, and higher efficiency, holding great prospect to achieve deep desulfurization. Though great efforts have been made, the desulfurization catalysts still suffer from inferior light absorption, fast recombination of photocarriers, and poor structure modification. This Review summarizes recent development of photocatalytic desulfurization, including the desulfurization principle, current desulfurization challenges, and corresponding solutions. Particularly, the roles of defect engineering, hybrid coupling, and structure modifications in the enhancement of photocatalytic performance are emphasized. In addition, the photocatalytic desulfurization mechanism is also introduced with the .OH and .O2− radicals as main active species. Finally, some perspectives on the photocatalytic desulfurization are provided, which can further optimize the desulfurization efficiency and guide future photocatalyst design.

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Preparation of TiO₂, Ag-doped TiO₂ nanoparticle and TiO₂–SBA-15 nanocomposites using simple aqueous solution-based chemical method and study of their photocatalytical activity

Cited by 17 publications

References 44 publications

Photo-Catalytic Properties of TiO2 Supported on MWCNTs, SBA-15 and Silica-Coated MWCNTs Nanocomposites

Photo-Catalytic Properties of TiO2 Supported on MWCNTs, SBA-15 and Silica-Coated MWCNTs Nanocomposites

Recent progress on Ag/TiO2 photocatalysts: photocatalytic and bactericidal behaviors

Desulfurization through Photocatalytic Oxidation: A Critical Review

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