光催化
材料科学
表面等离子共振
肖特基势垒
纳米技术
纳米晶
面(心理学)
化学工程
吸收(声学)
制氢
等离子体子
光电子学
纳米颗粒
氢
催化作用
化学
复合材料
工程类
二极管
社会心理学
有机化学
人格
生物化学
心理学
五大性格特征
作者
Xiangjiu Guan,Maochang Liu,Samuel S. Mao,Shaohua Shen
摘要
Localized surface plasmon resonance (LSPR) has drawn much interest in photocatalysis due to the advantages in extending light-absorption and improving charge-separation efficiency. In this work, Au nanocubes with exposed {100} facets and Au nanotrioctahedrons with exposed {221} facets are synthesized via the seed-growth method with the aim of demonstrating the photocatalytic performance under the LSPR effect using a typical TiO2 photocatalyst. The modification of Au nanocrystals results in accelerated charge separation in the TiO2 photocatalyst, which is attributed to the synergetic effect of local electromagnetic field enhancement from the LSPR effect and the Schottky junction established in Au and TiO2. Consequently, the photocatalytic hydrogen-production from the TiO2 photocatalyst is greatly improved. Moreover, Au nanotrioctahedrons modified TiO2 exhibits superior photocatalytic performance due to the stronger local electromagnetic field of the LSPR and the more efficient electron trapping originated from the unique morphology with exposed {221} facets.
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