Manuscript Topics

The fast increase in urbanization, industrialization, and population results in rapid growth of various problems, including energy, environment and drinking water issues. It is believed that “green” technology is the most promising to solve these problems, especially technologies based on solar radiation since natural and free energy from the Sun could be used for both energy conversion (generation of current and fuels, e.g., hydrogen via water splitting) and environmental purification, e.g., via reactive oxygen species (ROS) on the surface of photo-irradiated semiconductors (photocatalysts).

Among various semiconductor photocatalysts, metal oxides, especially titanium(IV) oxide (titania) is the most broadly investigated because of high activity, stability, low price and high abundance. However, the properties and thus resultant activities of various titania photocatalysts differ significantly. It is thought that polymorphic form, crystallinity, crystallite size, specific surface area, density and type (shallow vs deep) of defects (electron traps, ETs) govern the overall performance of photocatalysts. For example, high crystallinity, fine crystallite size, larger specific surface area and low content of deep ETs usually cause the low rate of charge carriers’ recombination, and thus high quantum yields of photocatalytic reactions. Additionally, the morphology of photocatalysts has been found crucial to influence the charge carriers’ migration. Accordingly, various nanoarchitecture design has been proposed to obtain highly efficient materials, e.g., nanotubes, nanowires, faceted nanoparticles, opals, inverse opals, microballs, flake balls, microspheres.

This special issue covers the design, preparation, characterization and application of nanostructured photocatalysts. The contributions on the following topics are highly welcome:
• Nanoarchitecture design
• Faceted particles
• 2D and 3D nanomaterials
• Mechanism study
• Solar energy conversion
• Environmental purification
• Water and wastewater treatment
• Antimicrobial properties
• Vis-responsive materials
• Solar fuels
• Green nanotechnology

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