Anodically Formed TiO&lt;SUB&gt;2&lt;/SUB&gt; Thin Films: Evidence for a Multiparameter Dependent Photocurrent-Structure Relationship

Passalacqua, Rosalba; Ampelli, Claudio; Perathoner, S.; Centi, Gabriele

doi:10.1166/nnl.2012.1303

Cited by 23 publications

(8 citation statements)

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“…A further development could derive from the use of photoelectrocatalytic (PEC) cells 43,[62][63][64] and the use of nanostructured lms of ordered titania nanotubes, [65][66][67] doped with copper ions. In a photo-electrocatalytic approach, the vapours evaporating from a dilute aqueous organic solution are fed to a photo-anode chamber for the oxidation process, while protons migrate through a proton membrane to the cathodic side where combine with the electrons coming from the anode through an external circuit to produce H 2 .…”

Section: Discussionmentioning

confidence: 99%

H2 production by selective photo-dehydrogenation of ethanol in gas and liquid phase on CuOx/TiO2 nanocomposites

et al. 2013

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CuOx/TiO2 nanocomposites prepared by copper photodeposition (1.0 and 2.5 wt% copper loading) on TiO2 (synthesized by three different routes) are studied in the ethanol photo-dehydrogenation in gas- and liquid-phase operations, and characterized in terms of surface area, phase composition by XRD, morphology and copper-oxide nanoparticle size distribution, and copper species by UV-visible diffuse reflectance spectroscopy. Cu2+ ions partially enter into the titania structure leading to the creation of oxygen vacancies responsible for the shift in the band gap, but also the creation of traps for photogenerated holes and electrons. While the band gap shifts to lower energies with the copper content, a maximum photocatalytic activity is shown for the intermediate copper loading. Gas-phase operations allow a higher H2 productivity with respect to liquid-phase operations, and especially a higher selectivity (about 92–93%) to acetaldehyde. It is remarked that the route of photo-dehydrogenation of ethanol to H2 and acetaldehyde has an economic value about 3.0–3.5 times higher than the alternative route of photoreforming to produce H2. Gas-phase operations would be preferable for the photo-dehydrogenation of ethanol

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Section: Discussionmentioning

confidence: 99%

H2 production by selective photo-dehydrogenation of ethanol in gas and liquid phase on CuOx/TiO2 nanocomposites

et al. 2013

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“…It is well known that the characteristics of the obtained TiO 2 nanostructures on Ti foils, such as size, shape, packing density, and length, depend on several synthesis parameters: electrolyte type, applied voltage, pH, and anodization time, etc. [ 26 , 27 ]. However, so far no study has been undertaken to investigate the modifications that occur by using the thin Ti film of commercial electrodes as a substrate.…”

Section: Resultsmentioning

confidence: 99%

Photo-Electrochemical Sensing of Dopamine by a Novel Porous TiO2 Array-Modified Screen-Printed Ti Electrode

Tavella

Ampelli

Leonardi

et al. 2018

Sensors

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In this paper, the development of a nanoporous TiO2 array-modified Ti electrode for photo-electrochemical (PEC) sensing of dopamine (DA) is reported. A porous TiO2 array-modified electrode was fabricated from the controlled anodic oxidation of a Ti working electrode of commercial screen-printed electrodes (SPE). The anodization process and the related morphological and microstructural transformation of the bare Ti electrode into a TiO2/Ti electrode was followed by scanning electron microscopy (SEM) and UV-visible reflectance spectroscopy (DR-UV-Vis). The modified electrode was irradiated with a low-power (120 mW) UV-Vis LED lamp (λ = 400 nm) and showed good performance for the detection of DA with a large linear response range, a sensitivity of 462 nA mM−1 cm−2, and a limit of detection of 20 µM. Moreover, it showed higher photocurrents in the presence of DA in comparison to some foreign species such as ascorbic acid, uric acid, glucose, K+, Na+, and Cl−. Thus, this proposed low-cost photo-electrochemical sensor, with the advantage of very simple fabrication, demonstrates potential applications for the determination of dopamine in real samples.

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“…The electro‐cathode was designed for metal nanoparticles that are embedded in substrates composed of C, while the photo‐anode was made of a thin nano TiO 2 film 109 . Water gets dissociated at the anode to form oxygen, protons, and electrons 110 . CO 2 was reduced at the electro‐cathode by protons moving from the anode through a proton selective membrane generally, Nafion, and electrons through a wire respectively.…”

Section: Methods For Co2 Conversionmentioning

confidence: 99%

Transformation of carbon dioxide, a greenhouse gas, into useful components and reducing global warming: A comprehensive review

Tran

Nguyen

2022

Intl J of Energy Research

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Summary CO2, a greenhouse gas, is continuously emitted by different sources due to the extensive use of fossil fuels. Hence various methods have been developed to mitigate CO2 gas from the environment. The capturing and storing of carbon is termed carbon capture and storage, a method of reducing the level of CO2 from the atmosphere emitted by industrial sites and power stations. The reduction of the atmospheric carbon or the stored carbon to different products by multiple techniques has been a current topic of research, taking the environmental concern into account. The reduction of CO2 is very challenging since the bond energy of C=O is very high. Additionally, the separation of the gas from the atmosphere or industrial flue gas is also technologically difficult. This review comprises a detailed discussion of the methods adopted for the conversion of CO2 into different carbon nano‐materials and hydrocarbons. The mechanisms associated with the conversion, along with the role of electrodes used for the conversion of the gas during electrolysis, have also been conferred extensively.

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Anodically Formed TiO<SUB>2</SUB> Thin Films: Evidence for a Multiparameter Dependent Photocurrent-Structure Relationship

Cited by 23 publications

References 0 publications

H2 production by selective photo-dehydrogenation of ethanol in gas and liquid phase on CuOx/TiO2 nanocomposites

H2 production by selective photo-dehydrogenation of ethanol in gas and liquid phase on CuOx/TiO2 nanocomposites

Photo-Electrochemical Sensing of Dopamine by a Novel Porous TiO2 Array-Modified Screen-Printed Ti Electrode

Transformation of carbon dioxide, a greenhouse gas, into useful components and reducing global warming: A comprehensive review

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