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A Three-Component Plasmonic Photocatalyst Consisting of Gold Nanoparticle and TiO2–SnO2 Nanohybrid with Heteroepitaxial Junction: Hydrogen Peroxide Synthesis
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-03-03 , DOI: 10.1021/acs.jpcc.9b11875 Kenta Awa 1 , Shin-ichi Naya 2 , Musashi Fujishima 3 , Hiroaki Tada 1, 2, 3
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-03-03 , DOI: 10.1021/acs.jpcc.9b11875 Kenta Awa 1 , Shin-ichi Naya 2 , Musashi Fujishima 3 , Hiroaki Tada 1, 2, 3
Affiliation
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SnO2 nanorods were hydrothermally grown on rutile TiO2 seed crystals (SnO2–NR#TiO2), where symbol # denotes the heteroepitaxial junction between SnO2 and TiO2. Furthermore, Au nanoparticles (NPs) were loaded on the surfaces of TiO2 and SnO2 of SnO2–NR#TiO2 by the deposition precipitation method (Au/[SnO2–NR#TiO2]). Au/[SnO2–NR#TiO2] possesses broad and strong absorption due to the localized surface plasmon resonance (LSPR) of Au NPs around 550 nm, while both TiO2 and SnO2 are almost transparent to visible light. On excitation of the LSPR (λex > 430 nm), Au/[SnO2–NR#TiO2] exhibits much higher photocatalytic activity for two-electron oxygen reduction reaction than two-component systems of Au/TiO2 and Au/SnO2 and their physical mixture. The striking photocatalytic activity of the three-component system stems from the efficient charge separation due to the LSPR-driven vectorial interfacial electron transfer in the direction of Au (on TiO2) → TiO2 → SnO2 → Au (on SnO2). Consequently, Au NPs on TiO2 and SnO2 work as the oxidation and reduction sites, respectively, and thus, the excellent electrocatalytic activity of Au NP for two-electron oxygen reduction reaction and low catalytic activity of SnO2 for H2O2 decomposition would also contribute to the high photocatalytic activity.
中文翻译：
金纳米粒子与异质外延结的TiO 2 -SnO 2纳米杂化物组成的三组分等离子光催化剂：过氧化氢的合成
SnO 2纳米棒在金红石型TiO 2籽晶（SnO 2 –NR＃TiO 2）上水热生长，其中符号＃表示SnO 2与TiO 2之间的异质外延结。此外，通过沉积沉淀法（Au / [SnO 2 -NR＃TiO 2 ]）将Au纳米颗粒（NPs）负载在SnO 2 -NR＃TiO 2的TiO 2和SnO 2的表面上。Au / [SnO 2 –NR＃TiO 2 ]具有宽而强的吸收性，这是由于Au NP的局部表面等离子体共振（LSPR）在550 nm附近，而两种TiO 2SnO 2和SnO 2对可见光几乎透明。在LSPR（λex > 430 nm）的激发下，Au / [SnO 2 -NR＃TiO 2 ]对双电子氧还原反应的光催化活性比Au / TiO 2和Au / SnO的两组分体系高。2和它们的物理混合物。由于LSPR驱动的矢量界面电子向Au（在TiO 2上）→TiO 2 →SnO 2 →Au（在SnO 2上）的方向进行有效的电荷分离，所以三组分体系具有惊人的光催化活性。因此，TiO 2和SnO上的金纳米颗粒2分别充当氧化和还原位点，因此，Au NP对两电子氧还原反应的出色电催化活性和SnO 2对H 2 O 2分解的低催化活性也将有助于高光催化活性。
更新日期：2020-03-03
中文翻译：
金纳米粒子与异质外延结的TiO 2 -SnO 2纳米杂化物组成的三组分等离子光催化剂：过氧化氢的合成
SnO 2纳米棒在金红石型TiO 2籽晶（SnO 2 –NR＃TiO 2）上水热生长，其中符号＃表示SnO 2与TiO 2之间的异质外延结。此外，通过沉积沉淀法（Au / [SnO 2 -NR＃TiO 2 ]）将Au纳米颗粒（NPs）负载在SnO 2 -NR＃TiO 2的TiO 2和SnO 2的表面上。Au / [SnO 2 –NR＃TiO 2 ]具有宽而强的吸收性，这是由于Au NP的局部表面等离子体共振（LSPR）在550 nm附近，而两种TiO 2SnO 2和SnO 2对可见光几乎透明。在LSPR（λex > 430 nm）的激发下，Au / [SnO 2 -NR＃TiO 2 ]对双电子氧还原反应的光催化活性比Au / TiO 2和Au / SnO的两组分体系高。2和它们的物理混合物。由于LSPR驱动的矢量界面电子向Au（在TiO 2上）→TiO 2 →SnO 2 →Au（在SnO 2上）的方向进行有效的电荷分离，所以三组分体系具有惊人的光催化活性。因此，TiO 2和SnO上的金纳米颗粒2分别充当氧化和还原位点，因此，Au NP对两电子氧还原反应的出色电催化活性和SnO 2对H 2 O 2分解的低催化活性也将有助于高光催化活性。
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