In this paper,ethylenediamine,diethylenetriamine and triethylene tetramine were used as N source and boric acid as B source to prepare different precursors to directly high temperature ammonolysis polymerize borocarbonitrides(BCN-x,recorded as BCN-EDA,BCN-DETA and BCN-TETA,respectively).XRD,SEM,TEM,XPS,UV-Vis,and PL were used to analyze the chemical composition,morphology,and optical proper-ties of samples.And the photocatalytic CO2 reduction performance of BCN-x samples was assessed without compromising agents and cocatalysts.The results show that all the prepared samples have lamellar structure,and BCN-EDA represents higher crystallinity and higher photocarrier separation efficiency.Under visible light irradiation at 350-780 nm,the produced BCN-x can reduce CO2 to CO and CH4,and BCN-EDA has the best photocatalytic CO2 reduction performance,with a CO yield of 32.20 pmol/g and the photocatalytic stability can be maintained within 20 h.
关键词
硼碳氮/光催化CO2还原/光生载流子分离/光催化稳定性
Key words
borocarbonitrides/photocatalytic CO2 reduction performance/photocarrier separation/photocatalytic stability
万方数据