本论文选取W18O49为研究对象，通过Mo掺杂对缺陷态进行进一步调控。

In this paper, W18O49 is selected as the research object, and the defect state is further controlled by Mo doping. Doped Mo replaces lattice defects in a low-cost form, and W atoms form unique Mo–W sites. Due to the different electronic structures of Mo and W, the Mo–W sites are heterogeneous, which changes the N2 molecule. The charge distribution of this type increases the difference in the charge density of N2 molecules. At the same time, Mo doping will also enhance the covalent nature of the metal oxygen (M–O) bond at the defect and promote electron transfer. Doping can also adjust the defect energy level and reduce the relaxation of electrons to the defect energy level during charge transfer. This promotes the activation and separation of N≡N bonds and improves the efficiency of photocatalytic nitrogen fixation to synthesize NH3.

This paper selected W18O49 as the research object, and further regulated the defect state by Mo doping. Doped Mo in the form of low-cost form to replace lattice defects, W atoms form a unique Mo-W site, because of the different electronic structure of Mo and W, resulting in Mo-W site has heterogeneity, thus changing the n2 molecular charge distribution, this distribution increases the difference in the charge density of N2 molecules, at the same time, Mo doping will also enhance the common properties of the metal oxygen (M-O) key at the defect, promoting electron transfer. Doping can also regulate the defect energy level, reduce the phenomenon of electron-to-defect energy-level relaxation in charge transfer, which promotes the activation and separation of the N-N key, and improves the efficiency of photocatalytic nitrogen-fixing synthesis NH3.

In this paper, W18O49 is selected as the research object, and the defect state is further regulated by Mo doping. The doped Mo takes the place of lattice defects in the form of low price, and W atoms form unique Mo-W sites. Due to the different electronic structures of Mo and W, Mo-W sites have heterogeneity, which changes the charge distribution of N2 molecules. This distribution increases the difference of charge density of N2 molecules. At the same time, Mo doping also enhances the covalent property of metal oxygen (M-O) bonds at the defects and promotes electron transfer Move. Doping can also adjust the defect energy level and reduce the relaxation of electrons to the defect energy level during the charge transfer process, which promotes the activation and separation of n ≡ n bond and improves the efficiency of photocatalytic nitrogen fixation to NH3.