Fabrication of Mesoporous Metal Chalcogenide Nanoflake Silica Thin Films and Spongy Mesoporous CdS and CdSe

Türker, Yurdanur; Karakaya, Cüneyt; Dag, Ömer

doi:10.1002/chem.201102643

Cited by 10 publications

(14 citation statements)

References 50 publications

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“…It can be seen that the edge absorptions of the composite films are coincident with the literature values of CdS nanostructures. 42,46,47 Note that the absorption edge of CdS-PDI composite films is blue-shifted gradually with decreased reaction time, indicating the formation of smaller CdS nanoparticles on the template of the PDI Langmuir film at shorter reaction time. 48 However, we have not observed the absorption peaks from the PDI component in the UV-vis absorption CdS-PDI composite films, which were expected to appear at ca.…”

Section: Uv-vis Absorption and Fluorescence Emission Spectramentioning

confidence: 99%

“…7), should be attributed to the excimer formed by the interaction between adjacent PDI molecules in the slipped cofacial arrangement in H-type aggregation. 37,47,48 Meanwhile, an emission band with relatively weak intensity in the 507-523 nm region can be assigned to the emission of CdS nanostructures. 36,42,46,49 Consistent with the absorption measurement, the emission maxima of CdS also show a gradual blue-shift depending on particle size (Fig.…”

Section: Uv-vis Absorption and Fluorescence Emission Spectramentioning

confidence: 99%

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Controlled preparation of CdS nanoparticle arrays in amphiphilic perylene tetracarboxylic diimides: organization, electron-transfer and semiconducting properties

et al. 2014

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Section: Uv-vis Absorption and Fluorescence Emission Spectramentioning

confidence: 99%

Section: Uv-vis Absorption and Fluorescence Emission Spectramentioning

confidence: 99%

Controlled preparation of CdS nanoparticle arrays in amphiphilic perylene tetracarboxylic diimides: organization, electron-transfer and semiconducting properties

et al. 2014

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“…These M‐MSNs resulting from the synthetic advances enable control over their composition, size, and morphology. Various metal species incorporated into the mesoporous silica frameworks include aluminum (Al), bismuth (Bi), cerium (Ce), chromium (Cr), cobalt (Co), copper (Cu), gadolinium (Gd), gallium (Ga),16a,23 gold (Au), indium (In), iridium (Ir), iron (Fe), manganese (Mn), molybdenum (Mo), nickel (Ni), palladium (Pd),21b,24,26,31 platinum (Pt),4n,14b,26,32 rhodium (Rh),26,32b rhuthenium (Ru), silver (Ag),14b,28b titanium (Ti),14c Zinc (Zn), Zirconium (Zr), and their respective oxides [aluminium oxide (Al 2 O 3 ), cadmium oxide (CdO), cerium oxide (CeO 2 ),27c cobalt(II) oxide/cobaltous oxide (CoO),20a,37 cobalt (II,III) oxide (Co 3 O 4 ),20a,38 cobalt(III) oxide/ cobaltic oxide (Co 2 O 3 ), chromium(III) oxide (Cr 2 O 3 ), copper oxide (CuO), ferric oxide (Fe 2 O 3 ), ferrous oxide (Fe 3 O 4 ), indium oxide (In 2 O 3 ), magnesium oxide (MgO), manganese oxide (Mn 3 O 4 ), manganese dioxide (MnO 2 ), molybdenum dioxide (MoO 2 ), molybdenum trioxide (MoO 3 ) nickel oxide (NiO),30a,48 palladium oxide (PdO),16a titanium dioxide (TiO 2 ),28b,34,49 vanadium oxide, zinc oxide (ZnO),], sulfides [cadmium sulfide (CdS), zinc sulfide (ZnS)],…”

Section: Impact Of Metals On Msnsmentioning

confidence: 99%

Metal Species–Encapsulated Mesoporous Silica Nanoparticles: Current Advancements and Latest Breakthroughs

Kankala

Zhang

Liu

et al. 2019

Adv Funct Materials

134

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Despite their advantageous morphological attributes and attractive physicochemical properties, mesoporous silica nanoparticles (MSNs) are merely supported as carriers or vectors for a reason. Incorporating various metal species in the confined nanospaces of MSNs (M-MSNs) significantly enriches their mesoporous architecture and diverse functionalities, bringing exciting potentials to this burgeoning field of research. These incorporated guest species offer enormous benefits to the MSN hosts concerning the reduction of their eventual size and the enhancement of their performance and stability, among other benefits. Substantially, the guest species act through contributing to reduced aggregation, augmented durability, ease of long-term storage, and reduced toxicity, attributes that are of particular interest in diverse fields of biomedicine. In this review, the first aim is to discuss the current advancements and latest breakthroughs in the fabrication of M-MSNs, emphasizing the pros and cons, the confinement of various metal species in the nanospaces of MSNs, and various factors influencing the encapsulation of metal species in MSNs. Further, an emphasis on potential applications of M-MSNs in various fields, including in adsorption, catalysis, photoluminescence, and biomedicine, among others, along with a set of examples is provided. Finally, the advances in M-MSNs with perspectives are summarized.(2-5 nm), tunable sizes (50-150 nm), shapes (hexagonal, wormhole-like, cubic, and lamellar) and morphologies (spheres, helical fibers, tubules, gyroids, crystals, and numerous other hierarchical complex architectures), ease of surface functionalization (both interior as well as exterior), unique topology, colloidal and thermal stabilities, and high dispersity. [4] The exceptional topology of surfactant-templated MSNs makes them unique with desirable properties that can be obtained by controlling the preparation conditions, such as the reaction temperature, pH value, stirring speed, and type of silica source, as well as surfactant, among others. [4j,m,n,5] These advantages make the MSNs as versatile materials and ideal choice for catalysis, [6] adsorption, [7] optical devices, [4j] polymeric fillers, [8] and diverse biomedical applications including bio-imaging, [4r,t,u,9] biocatalysts, [10] biosensing, [11] tissue engineering, [4f ] and drug/ gene delivery accounting for targeted and controlled release systems. [3d,4i,o-t,v,12] With these significant advantages and attractive physicochemical properties, it is highly anticipated to harness the desirable and beneficial properties of MSNs through the incorporation of various metals and their respective conjugates for exploration in innovative applications with exceptional performance. [13] The encapsulated metal species in the confined nanospaces of MSNs (M-MSNs) not only significantly enrich the mesoporous architecture and functionalities of MSN, but also tend to overcome their intrinsic limitations, such as their poor suspension ability and stability, lack of intrig...

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“…26 The MASA process also eliminates the formation of acids of the counter anion (usually nitrate or chloride) of the salt, used as a metal-ion source, in the H 2 S or H 2 Se reactions to convert the metal ions into metal sulfide or metal selenide QPs. 29…”

Section: Introductionmentioning

confidence: 99%

Modifying Titania Using the Molten-Salt-Assisted Self-Assembly Process for Cadmium Selenide–Quantum Dot-Sensitized Photoanodes

Yaman¹,

Han²,

Bandara

et al. 2017

ACS Omega

Self Cite

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Sensitizing titania with semiconducting quantum dots (QDs) is an important field for the development of third-generation photovoltaics. Many methods have been developed to effectively incorporate QDs over the surface of mesoporous titania, assembled from the 20–25 nm titania nanoparticles. Here, we introduce a molten-salt-assisted self-assembly (MASA) method to fabricate CdSe-modified mesoporous titania photoanodes. A mixture of ethanol, two surfactants (cetyltrimethylammonium bromide and 10-lauryl ether), silica (tetramethyl orthosilicate) or titania source (Ti(OC 4 H 9 ) 4 , acid (HNO 3 ), and cadmium nitrate solution was infiltrated into the pores of mesoporous titania (assembled using Degussa 25, P25) and immediately calcined at 450 °C to obtain mesoporous cadmium oxide–silica–titania (meso-CdO–SiO 2 –P25) or cadmium titanate–titania (meso-CdTiO 3 –P25) films. The MASA process is a simple method to smoothly coat or fill the pores of titania with mesoporous CdO–SiO 2 or CdTiO 3 that can be reacted under an H 2 Se atmosphere to convert cadmium species to CdSe at 100 °C. Etching of the silica films with a very dilute hydrogen fluoride solution produces mesoporous CdSe–titania (meso-CdSe–P25) electrodes. The method is flexible to adjust the CdSe/TiO 2 mole ratio over a very broad range in the films. The films were characterized at every stage of the preparation to demonstrate the effectiveness of the method. The electrodes were also tested in a simple two-electrode solar cell to demonstrate the performance of the electrodes that have a power conversion efficiency of 3.35%.

show abstract

Fabrication of Mesoporous Metal Chalcogenide Nanoflake Silica Thin Films and Spongy Mesoporous CdS and CdSe

Cited by 10 publications

References 50 publications

Controlled preparation of CdS nanoparticle arrays in amphiphilic perylene tetracarboxylic diimides: organization, electron-transfer and semiconducting properties

Controlled preparation of CdS nanoparticle arrays in amphiphilic perylene tetracarboxylic diimides: organization, electron-transfer and semiconducting properties

Metal Species–Encapsulated Mesoporous Silica Nanoparticles: Current Advancements and Latest Breakthroughs

Modifying Titania Using the Molten-Salt-Assisted Self-Assembly Process for Cadmium Selenide–Quantum Dot-Sensitized Photoanodes

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