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Reasons For The Deactivation Of Pt~0/tio_2 Photocatalyst Treated By Inert Gas N_2

机译:惰性气体N_2处理Pt〜0 / tio_2光催化剂失活的原因

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The effect of N_2 treatment on the photocatalytic activity of Pt~0/TiO_2 was investigated. The results showed that after treatment at 500 ℃ in N_2, 70% of the photocatalytic activity of 1.0 wt.% Pt~0/TiO_2 was lost by the evaluation of photocatalytic oxidation reaction of C_3H_6. Transmission electron microscopy (TEM) and Ar~+ ion sputtering tests revealed that in the course of high-temperature N_2 treatment, the size of Pt~0 particles on TiO_2 increases and a strong interaction between metal and support, i.e. Pt~0 particles encapsulated by Ti_xO_y, happens, which are the reasons for the deactivation of Pt~0/TiO_2 photocatalyst treated by high-temperature N_2.
机译:研究了N_2处理对Pt〜0 / TiO_2光催化活性的影响。结果表明,通过对C_3H_6的光催化氧化反应评价,在N_2中500℃处理后,失去了1.0重量%Pt〜0 / TiO_2的70%的光催化活性。透射电镜(TEM)和Ar〜+离子溅射测试表明,在高温N_2处理过程中,TiO_2上Pt〜0粒子的尺寸增加,金属与载体之间有很强的相互作用,即封装的Pt〜0粒子发生Ti_xO_y引起的,这是高温N_2处理使Pt〜0 / TiO_2光催化剂失活的原因。

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