钨青铜结构KSr2Nb5-xTaxO15粉体的制备与摩擦催化性能OA

KSr2Nb5-xTaxO15(doping content x=0,1,2,3,4)powders with rod-shaped were synthesized by the molten salt method,.Tribocatalytic performance of the catalysts was evaluated through dye degradation.The results show that the best catalytic activity is achieved in the sample with x=1.The degradation efficiency of Rhodamine B dye reachs 94.2％ after 2 h.Ta substitution improves the spontaneous polarization(Pr=20.06 μC/cm2)and specific surface area(11.4 m2/g)of the catalyst.Meanwhile,under the synergistic effect of friction and illumination,the degradation efficiency of RhB reaches 91.7％ after 50 minutes,and reaction efficiency increases up to 2.08 time.Considered ferroelectric material properties and tribocharging effect,a tribocatalytic mechanism involving the synergistic action between atoms and electron transition was proposed.