Hierarchical TiO₂photonic crystal spheres prepared by spray drying for highly efficient photocatalysis

Abstract

Hierarchical inverse opal titania photonic crystal (i-TiO 2 -PC) spheres have been prepared via spray drying and show highly photocatalytic capability in pollutant elimination. The hierarchical i-TiO 2 -PC spheres integrated a Mie scattering effect of micro-scale spheres and slow photon effect of photonic crystals with a wavelength-scale period structure, which gave birth to remarkable photocatalytic performance.In the photodegradation of methylene blue under irradiation of UV light, the rate constant of the i-TiO 2 -PC spheres was 1.66 times, on average, higher than that of Degussa P25.

Modular Design of Advanced Catalytic Materials Using Hybrid Organic–Inorganic Raspberry Particles

“…Titania PBs with various pore sizes demonstrated greater photoactivity than the standard nanocrystalline titania photocatalyst P25, as shown in Figure B, possibly due to an improved efficiency of light absorption through multiple scattering and the slow light effect as well as spatial confinement that prolongs the catalyst–reactants' interaction time . These results are in agreement with earlier studies and serve as a foundation for understanding the roles of the various parameters that influence the catalytic activity …”

Fabrication of AgInS2 nanoparticles sensitized TiO2 nanotube arrays and their photoelectrochemical properties

“…Well-aligned TiO 2 nanotube arrays (TiO 2 NTs) fabricated by electrochemical anodization have attracted tremendous interest in recent years because of their remarkably enhanced photoelectric properties and technological importance for various applications, including solar cells, photocatalysis, gas sensors, water splitting, and functional surface devices [1][2][3][4][5]. However, the poor utilization of solar energy and the high recombination rate of photogenerated electron-hole pairs are the two major factors limiting the further improvement of photoelectrochemical properties [6,7].…”

In-situ Construction of Superhydrophilic g-C3N4 Film by Vapor-Assisted Confined Deposition for Photocatalysis

“…To investigate the recyclability of the g-C 3 N 4 film, repeated degradation experiments were performed. The film photocatalyst could avoid the tedious collecting and cleaning steps usually occurred in the heterogeneous powder system (Yang et al, 2012;Liu et al, 2013bLiu et al, , 2016aLiu et al, , 2017bShan et al, 2019). After fourth cycle, CNFD and NFCF still maintain the similar catalytic performances (Figure 5C, Figure S7b).…”