Three-phase co-assembly of compositionally tunable WO3/TiO2 inverse opal photoelectrodes

Sakellis, Elias; Tsipas, Polychronis; Giannouri, M.; Gardelis, S.; Boukos, N.; Likodimos, V.

doi:10.1016/j.apsusc.2022.155919

Cited by 11 publications

(14 citation statements)

References 76 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The formation of nanocrystalline walls consisting mainly of anatase crystallites with sizes below 10 nm was identified by the intense diffraction spots in the fast Fourier transform (FFT) patterns arising from the dominant (101) anatase planes with 0.35 nm d -spacing (Figures b and S4). This is in agreement with previous results for the enhanced mesoporosity of co-assembled TiO 2 PC films using the TiBALDH precursor, which retards the growth of anatase nanoparticles and the anatase–rutile phase transformation, maintaining the periodic inverse opal network that is essential for the development of highly efficient mesoporous anatase TiO 2 photocatalysts , accommodating heterojunctions with other VLA constituents. , …”

Section: Resultssupporting

confidence: 93%

“…385 nm along with a stronger peak at ca. 430 nm related to the near-band gap emission and shallow defect states for anatase nanoparticles . The incorporation of MoS 2 nanosheets in the TiO 2 PCs caused a significant decrease of PL intensity, corroborating the presence of strong MoS 2 –TiO 2 interfacial coupling that reduces electron–hole recombination.…”

Section: Resultsmentioning

confidence: 65%

“…430 nm related to the near-band gap emission and shallow defect states for anatase nanoparticles. 50 The incorporation of MoS 2 nanosheets in the TiO 2 PCs caused a significant decrease of PL intensity, corroborating the presence of strong MoS 2 −TiO 2 interfacial coupling that reduces electron−hole recombination. Considering the broad size distribution of MoS 2 nanosheets and their random orientation relative to the anatase nanoparticles, the formation of diverse MoS 2 −TiO 2 heterojunctions in the inverse opal skeleton can be accordingly concluded, which promotes MoS 2 −TiO 2 charge separation and ROS generation for pharmaceutical degradation.…”

Section: Charge Separationmentioning

confidence: 65%

Section: Materials and Methodsmentioning

confidence: 99%

“…In situ incorporation of MoS 2 nanosheets in the nanocrystalline walls of the TiO 2 inverse opals was implemented by the three-phase co-assembly technique, originally applied for the uniform incorporation of plasmonic nanoparticles in metal oxide PCs 48,49 and more recently for the fabrication of heterostructured WO 3 /TiO 2 inverse opals. 50 This method was selected in order to facilitate the random orientation of MoS 2 nanosheet edges with respect to TiO 2 nanoparticles and the formation of firm interfaces (Scheme 1). Liquid cascade centrifugation was initially used for the size selection of MoS 2 nanosheets from the parent polydisperse MoS 2 suspension 51 in order to reduce its broad size distribution which proved detrimental for the inverse opal co-assembly.…”

Section: Chemicals and Reagentsmentioning

confidence: 99%

See 4 more Smart Citations

Co-assembled MoS₂–TiO₂ Inverse Opal Photocatalysts for Visible Light-Activated Pharmaceutical Photodegradation

Loukopoulos,

Sakellis,

Kostakis

et al. 2023

ACS Omega

Self Cite

View full text Add to dashboard Cite

Heterostructured photocatalytic materials in the form of photonic crystals have been attracting attention for their unique light harvesting ability that can be ideally combined with judicious compositional modifications toward the development of visible light-activated (VLA) photonic catalysts, though practical environmental applications, such as the degradation of pharmaceutical emerging contaminants, have been rarely reported. Herein, heterostructured MoS2–TiO2 inverse opal films are introduced as highly active immobilized photocatalysts for the VLA degradation of tetracycline and ciprofloxacin broad-spectrum antibiotics as well as salicylic acid. A single-step co-assembly method was implemented for the challenging incorporation of MoS2 nanosheets into the nanocrystalline inverse opal walls. Compositional tuning and photonic band gap engineering of the MoS2–TiO2 photonic films showed that integration of low amounts of MoS2 nanosheets in the inverse opal framework maintains intact the periodic macropore structure and enhances the available surface area, resulting in efficient VLA antibiotic degradation far beyond the performance of benchmark TiO2 films. The combination of broadband MoS2 visible light absorption and photonic-assisted light trapping together with the enhanced charge separation that enables the generation of reactive oxygen species via firm interfacial coupling between MoS2 nanosheets and TiO2 nanoparticles is concluded as a competent approach for pharmaceutical abatement in water bodies.

show abstract

Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 65%

Section: Charge Separationmentioning

confidence: 65%

Section: Materials and Methodsmentioning

confidence: 99%

Section: Chemicals and Reagentsmentioning

confidence: 99%

See 3 more Smart Citations

Co-assembled MoS₂–TiO₂ Inverse Opal Photocatalysts for Visible Light-Activated Pharmaceutical Photodegradation

Loukopoulos,

Sakellis,

Kostakis

et al. 2023

ACS Omega

Self Cite

View full text Add to dashboard Cite

show abstract

Bioinspired bioassay platforms derived from colloidal crystals with topological shapes

Wang,

Zhang,

Bian

et al. 2023

Aggregate

View full text Add to dashboard Cite

Colloidal crystals are materials self‐assembled from the colloidal nanoparticles. Due to the ordered microstructure, they exhibit significant optical properties and have shown huge potential in the field of biosensing. Besides, the unique macroscopic shapes can also play a critical role in the sensing process. Here, we present a comprehensive discussion on the colloidal crystal‐based biosensors with different topological shapes, including the development strategies of currently reported colloidal crystal particles, films, and fibers, and their recent progress in biosensing. In addition, the faced challenges and the possible solutions are also concluded and discussed. We expect this review can enrich the knowledge and encourage the communication of interdisciplinary researchers, thus promoting the further development and practical applications of colloidal crystal‐based biosensors.

show abstract

Photon Management Enabled by Opal and Inverse Opal Photonic Crystals: from Photocatalysis to Photoluminescence Regulation

Wang,

Cheng,

Zhu

et al. 2024

ChemPlusChem

View full text Add to dashboard Cite

Photonic crystals (PCs) can adjust the propagation and distribution of photons because of their unique periodic structures, which offers a compelling platform for photon management. The periodicity of materials with an alternating refractive index can be used to manipulate the dispersion of photons to generate the photonic bandgap (PBG), in which light is reflected. The slow photon effect, i.e., photon propagation at a reduced group velocity near the edges of the PBG, is widely regarded as another valuable optical property for manipulating light. Furthermore, multiple light scattering can increase the optical path, which is a vital optical property for PCs. Recently, the light reflected by PBG, the slow photon effect, and multiple light scattering have been exploited to improve light utilization efficiency in photoelectrochemistry, materials chemistry, and biomedicine to enhance light‐energy conversion efficiency. In this review, the fabrication of opal or inverse opal PCs and the theory for improving the light utilization efficiency of photocatalysis, solar cells, and photoluminescence regulation are discussed. We envision photon management of opal or inverse opal PCs may provide a promising avenue for light‐assisted applications to improve light‐energy‐conversion efficiency.

show abstract

Three-phase co-assembly of compositionally tunable WO3/TiO2 inverse opal photoelectrodes

Cited by 11 publications

References 76 publications

Co-assembled MoS₂–TiO₂ Inverse Opal Photocatalysts for Visible Light-Activated Pharmaceutical Photodegradation

Co-assembled MoS₂–TiO₂ Inverse Opal Photocatalysts for Visible Light-Activated Pharmaceutical Photodegradation

Bioinspired bioassay platforms derived from colloidal crystals with topological shapes

Photon Management Enabled by Opal and Inverse Opal Photonic Crystals: from Photocatalysis to Photoluminescence Regulation

Contact Info

Product

Resources

About

Three-phase co-assembly of compositionally tunable WO3/TiO2 inverse opal photoelectrodes

Cited by 11 publications

References 76 publications

Co-assembled MoS2–TiO2 Inverse Opal Photocatalysts for Visible Light-Activated Pharmaceutical Photodegradation

Co-assembled MoS2–TiO2 Inverse Opal Photocatalysts for Visible Light-Activated Pharmaceutical Photodegradation

Bioinspired bioassay platforms derived from colloidal crystals with topological shapes

Photon Management Enabled by Opal and Inverse Opal Photonic Crystals: from Photocatalysis to Photoluminescence Regulation

Contact Info

Product

Resources

About

Co-assembled MoS₂–TiO₂ Inverse Opal Photocatalysts for Visible Light-Activated Pharmaceutical Photodegradation

Co-assembled MoS₂–TiO₂ Inverse Opal Photocatalysts for Visible Light-Activated Pharmaceutical Photodegradation