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Titanium Dioxide Microsphere-Derived Materials for Solar Fuel Hydrogen Generation

Yan, Kai, Wu, Guosheng
ACS sustainable chemistry 2015 v.3 no.5 pp. 779-791
absorption, carbon, durability, energy, fuels, hydrogen, hydrogen production, optical properties, photocatalysts, solar energy, surface area, titanium dioxide
Hydrogen fuel is an excellent energy carrier for the development of a low carbon emission economy that has the potential to solve the energy and environmental problems in the future. Photocatalytic H₂ generation has received significant growth over the past few decades. Due to their unique properties, TiO₂ microspheres have attracted much attention to be utilized in the photocatalytic H₂ generation from water splitting. These microspheres-derived photocatalysts are known to offer the advantages of large surface area, tunable pore sizes, better allowing light absorption, efficient carrier separation, excellent electronic and optical properties, and high durability. Over the past few decades, significant research efforts have been allocated to the design of TiO₂ microspheres with desired functionality for efficient H₂ generation. This perspective will concentrate on recent advances in the synthesis of TiO₂ microsphere-derived photocatalysts and their applications for efficient solar fuel H₂ evolution from water splitting. Advanced strategies for the fabrication of TiO₂ microsphere-based materials have been critically reviewed. The up-to-date developments of technologies applied to TiO₂ microsphere-based materials for photocatalytic H₂ evolution are compared and commented. Current challenges and future perspectives for solar fuel H₂ generation will be also highlighted and discussed.