State-of-the-art advancements of crystal facet-exposed photocatalysts beyond TiO2: Design and dependent performance for solar energy conversion and environment applications |
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| Affiliation: | 1. State Key Laboratory of Environmental Friendly Energy Materials, Southwest University of Science and Technology, Mianyang, Sichuan 621010, PR China;2. Key Laboratory of Modern Acoustics (MOE), Institute of Acoustics, Department of Physics, Nanjing University, Nanjing, Jiangsu 210093, PR China;3. Chongqing Key Laboratory of Green Synthesis and Applications & Chongqing Key Laboratory of Inorganic Functional Materials, College of Chemistry, Chongqing Normal University, Chongqing 401331, China;4. School of Energy and Environment, Anhui University of Technology Ma''anshan 243002, Anhui, PR China;5. College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu 210093, PR China;6. Jiangsu Key Laboratory for Nano Technology, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Physics, Nanjing University, Nanjing, Jiangsu 210093, PR China |
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| Abstract: | Tailoring semiconductor crystals with optimized reactive facets is considered one of effective strategies to improve photocatalytic activity and selectivity for energy conversion and environmental remediation. The arrangement of surface atom structure through crystal facet engineering could tune surface free energy, electronic band structure, charge transfer and separation, the reactant adsorption and product desorption, and surface redox sites. This progress report aims to concisely highlight recent state-of-the-art progress of crystal facet-dependent performance of promising photocatalysts beyond TiO2. It includes (1) design of crystal-facet exposed photocatalysts with various routes through altering the relative order of the surface energy; (2) crystal facet-based surface junctions to promote the charge transfer and separation; (3) in situ techniques to detection of charge accumulation on crystal-faceted surfaces; (4) exposed face-determined photocatalytic application in water splitting, photoreduction of CO2 into renewable fuels, degradation of organic contaminants from the point of the reactant adsorption and activation. The challenges and prospects for future development are also presented. |
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