Adsorption and photocatalytic degradation of methylene blue over TiO2 films on carbon fiber prepared by atomic layer deposition

Dey, Nilay Kumar; Kim, Myoung Joo; Kim, Kwang-Dae; Seo, Hyun Ook; Kim, Dongwun; Kim, Young Dok; Lim, Dong Chan; Lee, Kyu Hwan

doi:10.1016/j.molcata.2011.01.010

Cited by 68 publications

(17 citation statements)

References 37 publications

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“…For all adsorbents, over 80% of the adsorption capacity was reached within the first 20 min of adsorption. Similar quick initial uptake of MB on other adsorbents has been reported in the literature [41,45]. At equilibrium, more MB is adsorbed by titania than by any of the synthesized nanocomposites as shown in Figures 8(b) and 8(c) and listed in Table 4.…”

Section: International Journal Of Photoenergysupporting

confidence: 86%

Synthesis of CdS Sensitized TiO₂Photocatalysts: Methylene Blue Adsorption and Enhanced Photocatalytic Activities

Makama

Salmiaton

Saion

et al. 2016

International Journal of Photoenergy

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A series of CdS/TiO2nanocomposites with different Cd to Ti molar ratio were synthesized from P25-TiO2nanopowder using microwave-assisted hydrothermal method. The as-produced powders were characterized by XRD, electron microscopy, EDX, and UV-Vis diffuse reflectance spectroscopy. The adsorption capacity and photocatalytic activity of the samples were investigated using methylene blue as a model pollutant. Sorption tests revealed that the adsorption of MB onto the samples obeys the Freundlich-Langmuir isotherm model. The sorption capacity decreased as follows:TiO2>TCd2>TCd1>TCd3>TCd4. The results of the photocatalytic tests under high-intensity discharge (HID) lamp revealed that CdS/TiO2powders with low Cd to Ti molar ratios exhibited much higher activities than P25-TiO2. The CdS/TiO2sample with 20% CdS/(TCd2) showed the most activity among all these samples. The results also show that the Cd to Ti molar ratio of the nanocomposite has a significant effect on the photodegradation of MB and the enhanced activities exhibited by the nanocomposites are because of the low rate of electron-hole recombination.

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Section: International Journal Of Photoenergysupporting

confidence: 86%

Synthesis of CdS Sensitized TiO₂Photocatalysts: Methylene Blue Adsorption and Enhanced Photocatalytic Activities

Makama

Salmiaton

Saion

et al. 2016

International Journal of Photoenergy

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“…The main contribution is attributed to Ti-O (531.0 eV) in TiO 2 [38]. The other two kinds of oxygen contributions can be counted by the hydroxyl groups (532.6 eV) and the C-O bonds (533.5 eV), respectively.…”

Section: Ft-ir and Xps Investigationmentioning

confidence: 99%

Visible-Light Degradation of Dyes and Phenols over Mesoporous Titania Prepared by Using Anthocyanin from Red Radish as Template

Yan

Gong

Chen

et al. 2014

International Journal of Photoenergy

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Heterogeneous photocatalysis is able to operate effectively to eliminate organic compounds from wastewater in the presence of semiconductor photocatalyst and a light source. Although photosensitization of titania by organic dyes is one of the conventional ways for visible-light utilization of titania, previous studies have not yet addressed the use of natural food coloring agents as templates in the synthesis of mesostructured materials, let alone the simultaneous achievement of highly crystalline mesoscopic framework and visible-light photocatalytic activity. In this work, anthocyanin, a natural pigment from red radish was directly used as template in synthesis of highly crystalline mesoporous titania. The synthesized mesoporous titania samples were characterized by a combination of various physicochemical techniques, such as XRD, SEM, HRTEM, nitrogen adsorption/desorption, and diffuse reflectance UV-Vis. The prepared mesoporous titania photocatalyst exhibited significant activity under visible-light irradiation for the degradation of dyes and phenols due to its red shift of band-gap-absorption onset and visible-light response as a result of the incorporation of surface carbon species.

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“…It is often assumed that the ALD process results in layer-by-layer growth of thin films. However, detailed studies of thin film growth on the nanometer scale show diverse growth modes of thin films by employing ALD [88,104]. NiO nanoparticles were prepared inside commercially available mesoporous silica using 50 ALD cycles and the resulting structure was used as a catalyst for DRM [57,58].…”

Section: Drm Catalysts Consisting Of Nanoparticles Implemented In a Mmentioning

confidence: 99%

“…For both cases (TiO 2 and MgO deposition), H 2 O vapor was used as the oxidizing agent. By altering the number of ALD cycles, the thickness of the metal oxide thin layers could be finely altered [88]. The ALD process generally operates below 300 • C, where metal oxide layers tend to show amorphous structures with rather ill-defined oxidation numbers of metal atoms as opposed to highly crystalline structures [69].…”

Section: Introductionmentioning

confidence: 99%

Atomic Layer Deposition for Preparation of Highly Efficient Catalysts for Dry Reforming of Methane

et al. 2019

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In this article, the structural and chemical properties of heterogeneous catalysts prepared by atomic layer deposition (ALD) are discussed. Oxide shells can be deposited on metal particles, forming shell/core type catalysts, while metal nanoparticles are incorporated into the deep inner parts of mesoporous supporting materials using ALD. Both structures were used as catalysts for the dry reforming of methane (DRM) reaction, which converts CO2 and CH4 into CO and H2. These ALD-prepared catalysts are not only highly initially active for the DRM reaction but are also stable for long-term operation. The origins of the high catalytic activity and stability of the ALD-prepared catalysts are thoroughly discussed.

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Adsorption and photocatalytic degradation of methylene blue over TiO2 films on carbon fiber prepared by atomic layer deposition

Cited by 68 publications

References 37 publications

Synthesis of CdS Sensitized TiO₂Photocatalysts: Methylene Blue Adsorption and Enhanced Photocatalytic Activities

Synthesis of CdS Sensitized TiO₂Photocatalysts: Methylene Blue Adsorption and Enhanced Photocatalytic Activities

Visible-Light Degradation of Dyes and Phenols over Mesoporous Titania Prepared by Using Anthocyanin from Red Radish as Template

Atomic Layer Deposition for Preparation of Highly Efficient Catalysts for Dry Reforming of Methane

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Adsorption and photocatalytic degradation of methylene blue over TiO2 films on carbon fiber prepared by atomic layer deposition

Cited by 68 publications

References 37 publications

Synthesis of CdS Sensitized TiO2Photocatalysts: Methylene Blue Adsorption and Enhanced Photocatalytic Activities

Synthesis of CdS Sensitized TiO2Photocatalysts: Methylene Blue Adsorption and Enhanced Photocatalytic Activities

Visible-Light Degradation of Dyes and Phenols over Mesoporous Titania Prepared by Using Anthocyanin from Red Radish as Template

Atomic Layer Deposition for Preparation of Highly Efficient Catalysts for Dry Reforming of Methane

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Synthesis of CdS Sensitized TiO₂Photocatalysts: Methylene Blue Adsorption and Enhanced Photocatalytic Activities

Synthesis of CdS Sensitized TiO₂Photocatalysts: Methylene Blue Adsorption and Enhanced Photocatalytic Activities