Research Progress of Photocatalytic Reduction of Nitrogen to Ammonia by Semiconductors
Photocatalytic nitrogen fixation technology takes clean solar energy as the driving energy,using rich nitrogen and water as raw materials.Adhering to the principle of green and sustainable development,it is a potential technology for ammonia synthesis.However,the reaction efficiency of photocatalytic nitrogen reduction is generally low,which seriously restricts the application and development of this technology.Based on the introduction of ni-trogen reduction process,the main challenges of photocatalytic nitrogen fixation system are pointed out in this paper at present.The modification strategies of semiconductor nanomate-rials and the cases for photocatalytic nitrogen fixation reported in recent years are reviewed mainly from enhancing light absorption,accelerating the separation and transfer of photoge-nerated charges,and promoting N2 adsorption and activation.Finally,the future develop-ment trend of this field is analyzed and prospected.
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