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为了防止负载型催化剂在实际应用中发生金纳米颗粒高温团聚现象,制备了一种耐高温多孔Au@NiO,并探索了最佳实验条件。利用SEM、BET、XRD等手段对其进行表面结构的表征分析,结果发现其孔径分布(23~75 nm)正好位于有效金纳米颗粒催化粒径范围(0~100 nm)。随后,将金纳米颗粒负载在其表面,结果发现这类多孔氧化镍结构有效隔断了高温下金纳米颗粒的团聚,表现出了较好的耐热性,抑制了该环境下金纳米颗粒高温团聚现象。
In order to prevent the agglomeration of gold nanoparticles during practical application, a high temperature porous Au @ NiO was prepared and the best experimental conditions were explored. The surface structure was characterized by SEM, BET and XRD. The results showed that the pore size distribution (23 ~ 75 nm) was just within the range of 0 ~ 100 nm in the catalytic particle size of Au NPs. Subsequently, gold nanoparticles were supported on the surface of the gold nanoparticles. As a result, it was found that such porous nickel oxide structures effectively block the agglomeration of the gold nanoparticles at a high temperature, exhibit good heat resistance, inhibit the high temperature aggregation of the gold nanoparticles phenomenon.