Nitrogen doped carbon nanotubes grafted TiO2 rutile nanofilms: Promising material for dye sensitized solar cell application

Belkhanchi, Hamza; Ziat, Younes; Hammi, Maryama; Laghlimi, Charaf; Moutcine, Abdelaziz; Benyounes, Anas; Kzaiber, Fouzia

doi:10.1016/j.ijleo.2020.166234

Cited by 13 publications

(4 citation statements)

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“…Figure 3 d shows that TiO 2 nanoparticles are uniformly dispersed over CNT, as was found in previous works on N-doped TiO 2 /CNT composites synthesized with traditional synthesis [ 32 ] and undoped TiO 2 /CNT composites synthesized with supercritical fluids [ 8 ]. The crystallite size was about 10 nm, showing a narrower distribution than unsupported N-doped TiO 2 nanoparticles (14 nm).…”

Section: Resultssupporting

confidence: 75%

“…In this case, the main reason is undoubtedly the extraordinarily good ability of the composites obtained in this work to absorb visible light compared to conventional N-doped TiO 2 /rGO materials [ 39 ]. The poorer photocatalytic activity of N-doped TiO 2 /CNT composites seems to be derived from the smaller crystallite size [ 32 ] and BET area [ 34 ] of the materials obtained in this work, in contrast to those synthesized with traditional methods.…”

Section: Resultsmentioning

confidence: 99%

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Photocatalytic Reduction of CO2 with N-Doped TiO2-Based Photocatalysts Obtained in One-Pot Supercritical Synthesis

et al. 2022

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The objective of this work was to analyze the effect of carbon support on the activity and selectivity of N-doped TiO2 nanoparticles. Thus, N-doped TiO2 and two types of composites, N-doped TiO2/CNT and N-doped TiO2/rGO, were prepared by a new environmentally friendly one-pot method. CNT and rGO were used as supports, triethylamine and urea as N doping agents, and titanium (IV) tetraisopropoxide and ethanol as Ti precursor and hydrolysis agent, respectively. The as-prepared photocatalysts exhibited enhanced photocatalytic performance compared to TiO2 P25 commercial catalyst during the photoreduction of CO2 with water vapor. It was imputed to the synergistic effect of N doping (reduction of semiconductor band gap energy) and carbon support (enlarging e−-h+ recombination time). The activity and selectivity of catalysts varied depending on the investigated material. Thus, whereas N-doped TiO2 nanoparticles led to a gaseous mixture, where CH4 formed the majority compared to CO, N-doped TiO2/CNT and N-doped TiO2/rGO composites almost exclusively generated CO. Regarding the activity of the catalysts, the highest production rates of CO (8 µmol/gTiO2/h) and CH4 (4 µmol/gTiO2/h) were achieved with composite N1/TiO2/rGO and N1/TiO2 nanoparticles, respectively, where superscript represents the ratio mg N/g TiO2. These rates are four times and almost forty times higher than the CO and CH4 production rates observed with commercial TiO2 P25.

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Section: Resultssupporting

confidence: 75%

Section: Resultsmentioning

confidence: 99%

Photocatalytic Reduction of CO2 with N-Doped TiO2-Based Photocatalysts Obtained in One-Pot Supercritical Synthesis

et al. 2022

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“…Dye Sensitized Solar Cells (DSSC) were first discovered by Michael Grätzel and Brian O'Regan in 1991. DSSC continues to develop until the manufacture of Nitrogen-doped carbon nanotubes grafting rutile TiO 2 nanofilms, which is carried out by Belkhanchi et al [10]. The DSSC device consists of a conductive glass, a semiconductor oxide material, a dye as a photosensitizer, an electrolyte, and a counter electrode [11][12].…”

Section: ■ Introductionmentioning

confidence: 99%

Fabrication of Dye Sensitized Solar Cell (DSSC) Using Combination of Dyes Extracted from Curcuma (<i>Curcuma xanthorrhiza</i>) Rhizome and Binahong (<i>Anredera cordifolia</i>) Leaf with Treatment in pH of the Extraction

Setiarso,

Harsono,

Kusumawati

2023

Indones. J. Chem.

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Research on Dye Sensitized Solar Cell (DSSC) fabrication has been carried out using a combination of dyes extracted from Curcuma xanthorrhiza and Anredera cordifolia. Each dye was extracted by treating pH 1 to 13 and then characterized using UV-Vis spectroscopy. The band gap energy was determined by using the cyclic voltammetric method. The UV-Vis spectrum of C. xanthorrhiza extract reveals the presence of curcumin components. The UV-Vis spectrum of A. cordifolia indicates the presence of chlorophyll and a trace of anthocyanin. C. xanthorrhiza extract had the least band gap energy in the acid phase, pH 1, at 0.66 eV, and the alkaline phase, pH 13, at 0.43 eV. The minimum band gap energy of A. cordifolia extract was determined to be 0.96 eV in the acid phase, pH 7, and 0.65 eV in the alkaline phase, pH 12. When A. cordifolia and C. xanthorrhiza extracts were mixed, with the best composition ratios being pH 7:pH 1 (3:2 ≈ pH 1.7) and pH 12:pH 13 (1:4 ≈ pH 12.6). The composition of this mixture was applied to the DSSC resulting in an efficiency of 0.096 and 0.147%, respectively.

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“…Dye photovoltaic cells are commonly developed in the last decades as the 3rd generation of solar cells [6]. It is a simple and inexpensive technology according to the literature because it uses inexpensive and available semiconductor materials; for example: titanium dioxide (TiO2) [7][8][9][10][11] or zinc oxide (ZnO) [12][13][14][15]. To make these cells more competitive it is important to study their characteristics and the possibility of adding (and/or replacing some components with) other materials that can improve photon absorption and charge transport in the active layer and limiting charge recombination in order to increase the conversion efficiency of the cell.…”

Section: Introductionmentioning

confidence: 99%

CNTs modified ZnO and TiO₂ thin films: The effect of loading rate on band offset at metal / semiconductor interfaces

et al. 2022

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ZnO and TiO2 are direct wide band gap semiconductors with intriguing properties. A wide range of applications makes it one of the most studied materials in the past decade, particularly when elaborated as nanostructures. In this work, we focus on synthesis of CNTs modified ZnO and TiO2 thin films using sol-gel method. The morphological and optical characterizations of the based ZnO and TiO2 films were carried out using scanning and transmission electron microscopy (SEM and TEM), XRD and UV spectroscopy. Electrical properties of the deposited ZnO/CNTs and CNTs /TiO2 were studied using I-V measurements at room temperature in metal/semiconductor/metal configuration, by the use of an array of metallic micro-electrodes deposited on the surface of the elaborated thin films. This allows determining qualitatively the electrical conductivity of thin films and the different parameters of the Schottky junction between the composites nano-films and the substrate. This study is necessary for future applications in solar cell.

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Nitrogen doped carbon nanotubes grafted TiO2 rutile nanofilms: Promising material for dye sensitized solar cell application

Cited by 13 publications

References 14 publications

Photocatalytic Reduction of CO2 with N-Doped TiO2-Based Photocatalysts Obtained in One-Pot Supercritical Synthesis

Photocatalytic Reduction of CO2 with N-Doped TiO2-Based Photocatalysts Obtained in One-Pot Supercritical Synthesis

Fabrication of Dye Sensitized Solar Cell (DSSC) Using Combination of Dyes Extracted from Curcuma (<i>Curcuma xanthorrhiza</i>) Rhizome and Binahong (<i>Anredera cordifolia</i>) Leaf with Treatment in pH of the Extraction

CNTs modified ZnO and TiO₂ thin films: The effect of loading rate on band offset at metal / semiconductor interfaces

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Nitrogen doped carbon nanotubes grafted TiO2 rutile nanofilms: Promising material for dye sensitized solar cell application

Cited by 13 publications

References 14 publications

Photocatalytic Reduction of CO2 with N-Doped TiO2-Based Photocatalysts Obtained in One-Pot Supercritical Synthesis

Photocatalytic Reduction of CO2 with N-Doped TiO2-Based Photocatalysts Obtained in One-Pot Supercritical Synthesis

Fabrication of Dye Sensitized Solar Cell (DSSC) Using Combination of Dyes Extracted from Curcuma (<i>Curcuma xanthorrhiza</i>) Rhizome and Binahong (<i>Anredera cordifolia</i>) Leaf with Treatment in pH of the Extraction

CNTs modified ZnO and TiO2 thin films: The effect of loading rate on band offset at metal / semiconductor interfaces

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CNTs modified ZnO and TiO₂ thin films: The effect of loading rate on band offset at metal / semiconductor interfaces