期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 8, 期 37, 页码 19623-19630出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta06747d
关键词
-
资金
- National Natural Science Foundation of China [21701122]
- Natural Science Foundation of Tianjin City [17JCJQJC44700]
Developing a novel strategy for energy-efficient and clean synthesis of NO from distributed sources is highly desirable. Herein, we present a facile and green method to synthesize NO through the thermal-assisted photocatalytic oxidation of N(2)using simulated air as the reactant in a flow reactor. The TiO2/WO(3)heterostructured nanorods were constructed and exhibited good activity for NO photosynthesis assisted by heating in the range of 200-350 degrees C. The yield rate of NO reached 0.16 mmol g(-1)h(-1)at 300 degrees C with a quantum efficiency of 0.31% at 365 nm.N-15 isotope labeling experiments proved the origin of NO from N(2)oxidation. Experimental and theoretical results revealed that the lattice oxygen in the heterostructures participated in the photooxidation reaction of N-2, and the electron transfer from WO(3)to TiO(2)at the interface of the heterojunction under illumination could facilitate the adsorption of N(2)and the formation of NO* intermediates and thus enhanced the photocatalytic N(2)oxidation performance. Importantly, the solar-driven oxidation generated NO can be directly used for the synthesis of fine chemicals including nitric acid and beta-nitrostyrolene. Our work opens a new avenue for nitrogen fixationviasolar-driven N(2)oxidation from distributed sources of air.
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