A promising visible-light photocatalyst: H2 plasma-activated amorphous-TiO2-supported Au nanoparticles
A promising visible-light photocatalyst: H2 plasma-activated amorphous-TiO2-supported Au nanoparticles
复制标题
一种有前途的可见光光催化剂：氢气等离子体激活的非晶态 TiO2 负载的金纳米粒子
DOI：
10.1016/j.jcat.2019.05.027
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发表时间：
2019-07-01
影响因子：
7.3
通讯作者：
Zhu, Ai-Min
中科院分区：
文献类型：
--
作者：
Sun, Zhi-Guang;Li, Xiao-Song;Zhu, Ai-Min
功能化的无定形二氧化钛(AMT)具有较高的比表面积和丰富的表面羟基，有望成为等离子体金/二氧化钛纳米催化剂的载体。为了克服常规热处理对等离子体Au/AMT纳米催化剂的限制，采用了冷氢(H-2)等离子体活化，使其能够获得优异的可见光(VL)光催化活性和耐久性。催化剂的表征结果表明，H-2等离子体可以活化Au/AMT纳米催化剂，形成高水平的金属Au，具有很强的表面等离子体共振、低的电荷转移阻力以及Au纳米粒子与AMT载体之间独特的界面。对不同等离子体(H-2或O-2)活化Au/AMT和Au/P25(Degussa Ti02)的比较研究表明，H-2等离子体活化Au/AMT的优异性能源于表面羟基与Au前驱体之间的强相互作用。这项工作为在柔性衬底上制备VL光催化Au/AMT薄膜提供了可能性，在光催化和太阳能电池中具有广泛的应用。(C)2019 Elsevier Inc.保留所有权利。
Functionalized amorphous TiO2 (AmT) with high surface area and abundant surface hydroxyl groups could be a promising support for plasmonic Au/TiO2 nanocatalysts. To overcome the limitations of conventional heat treatment on plasmonic Au/AmT nanocatalysts, cold hydrogen (H-2) plasma activation is employed and makes it possible to achieve superior visible-light (VL) photocatalytic activity and durability. Catalyst characterization results suggest that H-2 plasma can activate Au/AmT nanocatalysts to form high levels of metallic Au with strong surface plasmon resonance, low charge transfer resistance, and a unique interface between Au nanoparticles and AmT support. Comparative study of Au/AmT and Au/P25 (Degussa TiO2) activated by different plasmas (H-2 or O-2) reveals that the excellent performance of H-2 plasma in Au/AmT activation originates from strong interaction between surface hydroxyl groups and Au precursors. This work offers the potential for preparing VL photocatalytic Au/AmT films on flexible substrates for extensive applications in photocatalysis and solar cells. (C) 2019 Elsevier Inc. All rights reserved.