A collection of ordered-disordered Bi_(2)WO_(6)homojunction catalysts was prepared in-situ through a facile one-step hydrothermal process,and their photocatalytic nitrogen fixation to synthesize ammonia performance wa...A collection of ordered-disordered Bi_(2)WO_(6)homojunction catalysts was prepared in-situ through a facile one-step hydrothermal process,and their photocatalytic nitrogen fixation to synthesize ammonia performance was evaluated.Results showed that ordered-disordered Bi_(2)WO_(6)(OD-2)obtained by adding 1.5 mL of ethylene glycol during preparation exhibited the optimal nitrogen fixation performance,with a nitrogen fixation rate of 114.92μmol·g^(-1)·h^(-1).However,its crystal counterpart,Bi_(2)WO_(6)(BWO),lacked nitrogen-fixation activity.In-situ diffuse reflectance-Fourier transform infrared technique(DR-FTIR),electrochemical tests,and energy band structure analysis confirmed that the surface disordered structure in OD-2 not only promoted nitrogen activation but also enabled the effective separation of photogenerated electron-hole pairs at the ordered-disordered interface,facilitating the interface electrons transfer to the surface disordered structure of OD-2 and reacting with N_(2) adsorbed on the disordered structure,thereby promoting the smooth progress of the nitrogen fixation reaction.展开更多
文摘A collection of ordered-disordered Bi_(2)WO_(6)homojunction catalysts was prepared in-situ through a facile one-step hydrothermal process,and their photocatalytic nitrogen fixation to synthesize ammonia performance was evaluated.Results showed that ordered-disordered Bi_(2)WO_(6)(OD-2)obtained by adding 1.5 mL of ethylene glycol during preparation exhibited the optimal nitrogen fixation performance,with a nitrogen fixation rate of 114.92μmol·g^(-1)·h^(-1).However,its crystal counterpart,Bi_(2)WO_(6)(BWO),lacked nitrogen-fixation activity.In-situ diffuse reflectance-Fourier transform infrared technique(DR-FTIR),electrochemical tests,and energy band structure analysis confirmed that the surface disordered structure in OD-2 not only promoted nitrogen activation but also enabled the effective separation of photogenerated electron-hole pairs at the ordered-disordered interface,facilitating the interface electrons transfer to the surface disordered structure of OD-2 and reacting with N_(2) adsorbed on the disordered structure,thereby promoting the smooth progress of the nitrogen fixation reaction.
