Ordered CdSe-sensitized TiO2 inverse opal film as multifunctional surface-enhanced Raman scattering substrate

Wang, Xueyan; Li, Juan; Gao, Xinna; Shen, Yuhua

doi:10.1016/j.apsusc.2018.08.216

Cited by 12 publications

(3 citation statements)

References 35 publications

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“…The final step is to remove the template, which might be done by calcination (for polymers) [177,178,183,192] and chemical treatment with a concentrated base, sodium hydroxide, or hydrofluoric acid (for silica) [193]. In order to enhance light harvesting and/or the resultant properties and photocatalytic activities, modifications with metals, e.g., gold [179,191], silver [193], nickel [186,194], and semiconductors, e.g., cadmium selenide, cadmium sulfide quantum dots (QDs) [184,195], and zinc oxide NPs [196], have been proposed. crystallization of titania is performed, which results in 15%-30% shrinkage of the structure, causing the pore size reduction [188][189][190][191].…”

Section: Inverse Opal Photonic Crystals (Io-pcs)mentioning

confidence: 99%

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

et al. 2019

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Titania photocatalysts have been intensively examined for both mechanism study and possible commercial applications for more than 30 years. Although various reports have already been published on titania, including comprehensive review papers, the morphology-governed activity, especially for novel nanostructures, has not been reviewed recently. Therefore, this paper presents novel, attractive, and prospective titania photocatalysts, including zero-, one-, two-, and three-dimensional titania structures. The 1D, 2D, and 3D titania structures have been mainly designed for possible applications, e.g., (i) continuous use without the necessity of particulate titania separation, (ii) efficient light harvesting (e.g., inverse opals), (iii) enhanced activity (fast charge carriers' separation, e.g., 1D nanoplates and 2D nanotubes). It should be pointed out that these structures might be also useful for mechanism investigation, e.g., (i) 3D titania aerogels with gold either incorporated inside the 3D network or supported in the porosity, and (ii) titania mesocrystals with gold deposited either on basal or lateral surfaces, for the clarification of plasmonic photocatalysis. Moreover, 0D nanostructures of special composition and morphology, e.g., magnetic(core)-titania(shell), mixed-phase titania (anatase/rutile/brookite), and faceted titania NPs have been presented, due to their exceptional properties, including easy separation in the magnetic field, high activity, and mechanism clarification, respectively. Although anatase has been usually thought as the most active phase of titania, the co-existence of other crystalline phases accelerates the photocatalytic activity significantly, and thus mixed-phase titania (e.g., famous P25) exhibits high photocatalytic activity for both oxidation and reduction reactions. It is believed that this review might be useful for the architecture design of novel nanomaterials for broad and diverse applications, including environmental purification, energy conversion, synthesis and preparation of "intelligent" surfaces with self-cleaning, antifogging, and antiseptic properties.

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Section: Inverse Opal Photonic Crystals (Io-pcs)mentioning

confidence: 99%

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

et al. 2019

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“…To further increase the photocatalytic performance by enhanced light harvesting, IO structures have been modified with various compounds, including metals, e.g., gold [79,91], silver [93], and nickel [86,101], semiconductors, e.g., cadmium selenide and cadmium sulfide QDs [84,102] and zinc oxide NPs [103], and by "self-doping" (surface-disordered-engineered TiO 2 PCs [97]). The modifications with NM, resulting in mainly formation of plasmonic photocatalysts, are discussed in the next section.…”

Section: Photonic Crystals (Pcs)mentioning

confidence: 99%

Photonic Crystals for Plasmonic Photocatalysis

2020

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Noble metal (NM)-modified wide-bandgap semiconductors with activity under visible light (Vis) irradiation, due to localized surface plasmon resonance (LSPR), known as plasmonic photocatalysts, have been intensively studied over the last few years. Despite the novelty of the topic, a large number of reports have already been published, discussing the optimal properties, synthesis methods and mechanism clarification. It has been proposed that both efficient light harvesting and charge carriers’ migration are detrimental for high and stable activity under Vis irradiation. Accordingly, photonic crystals (PCs) with photonic bandgap (PBG) and slow photon effects seem to be highly attractive for efficient use of incident photons. Therefore, the study on PCs-based plasmonic photocatalysts has been conducted, mainly on titania inverse opal (IO) modified with nanoparticles (NPs) of NM. Although, the research is quite new and only several reports have been published, it might be concluded that the matching between LSPR and PBG (especially at red edge) by tuning of NMNPs size and IO-void diameter, respectively, is the most crucial for the photocatalytic activity.

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“…Indeed, the conversion of optical signals into electrical ones is a widely required process in many elds, such as optical communication, ame detection, missile guidance and monitoring of the hole in the ozone layer. [1][2][3][4][5][6][7][8] Wide band gap semiconductor materials are more important for visible-blind ultraviolet (UV) photodetectors because of their higher optical transmittance in the visible region and superior UV photosensitivity, such as ZnO, [9][10][11] SnO 2 , 12 ZnS, [13][14][15] In 2 S 3 , 16,17 MoS 2 , 18 and SnS. 19 Among these wide bandgap materials TiO 2 nanomaterials have great potential in the high-performance photodetector industry thanks to their numerous advantages including excellent chemical stability, abundant reserves, low cost, non-toxicity and their interesting optical and electronic properties.…”

Section: Introductionmentioning

confidence: 99%

Annealing effect on the physical properties of TiO₂ thin films deposited by spray pyrolysis

Alaya,

Souissi,

Toumi

et al. 2023

RSC Adv.

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Ordered CdSe-sensitized TiO2 inverse opal film as multifunctional surface-enhanced Raman scattering substrate

Cited by 12 publications

References 35 publications

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

Photonic Crystals for Plasmonic Photocatalysis

Annealing effect on the physical properties of TiO₂ thin films deposited by spray pyrolysis

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Ordered CdSe-sensitized TiO2 inverse opal film as multifunctional surface-enhanced Raman scattering substrate

Cited by 12 publications

References 35 publications

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

Photonic Crystals for Plasmonic Photocatalysis

Annealing effect on the physical properties of TiO2 thin films deposited by spray pyrolysis

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Annealing effect on the physical properties of TiO₂ thin films deposited by spray pyrolysis