首页|Cubic S/N co-doped TiO2 with rich oxygen vacancies from Ti-MOFs for efficient elimination of formaldehyde
Cubic S/N co-doped TiO2 with rich oxygen vacancies from Ti-MOFs for efficient elimination of formaldehyde
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The cubic S/N co-doped TiO2(TNSx,x is the calcination temperature)photocatalysts with rich oxygen va-cancies were obtained by high temperature calcination of sulfur powder and titanium-based MOFs NH2-MIL-125 for the photocatalytic removal of gaseous formaldehyde(a volatile organic compound).Among the obtained catalysts,the presence of oxygen vacancies restricted photogenerated electron and holes re-combination.98.00%removal of gaseous formaldehyde in 150 min could be achieved over TNS600 by xenon lamp.The removal efficiency for formaldehyde was well retained for five cycle experiment.The results from PL,TRPL and EIS revealed that TNS600 had the best separation efficiency of photogenerated electrons and holes,and the enhanced charge separation led to a significant increase in photocatalytic activity.The photocatalytic oxidation mechanism indicated that the·OH and·O2-radicals were mainly involved in the efficient elimination of gaseous formaldehyde and were able to mineralize formaldehyde to H2O and CO2.
State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China
Beijing Key Laboratory for Green Catalysis and Separation,Key Laboratory of Beijing on Regional Air Pollution Control,Key Laboratory of Advanced Functional Materials,Education Ministry of China,Department of Chemical Engineering,Beijing University of Technology,Beijing 100124,China