用于光电化学水分解的金纳米颗粒敏化氧化锌纳米铅笔阵列

Au nanoparticle sensitized ZnO nanopencil arrays for photoelectrochemical water splitting.

作者信息

Wang Tuo, Lv Rui, Zhang Peng, Li Changjiang, Gong Jinlong

机构信息

Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China.

出版信息

Nanoscale. 2015 Jan 7;7(1):77-81. doi: 10.1039/c4nr03735a.

DOI:10.1039/c4nr03735a

PMID:25113466

Abstract

This paper describes the synthesis of Au nanoparticle sensitized ZnO nanopencil arrays on F-doped SnO2 substrates by an aqueous chemical growth and subsequent photoreduction method. The Au-ZnO nanopencil arrays yield a photocurrent of ∼ 1.5 mA cm(-2) at 1 V versus Ag/AgCl. The enhanced photocurrent is attributed to the surface plasmon resonance effect of Au nanoparticles and the prolonged lifetime of the photo-generated electron-hole pairs. The improved stability of ZnO is due to the plasmon resonance energy transfer process enabled by the Au nanoparticles, which enhances the electric field intensity in a small, well-defined location of the ZnO semiconductor.

摘要

本文描述了通过水热化学生长及后续光还原法在氟掺杂的二氧化锡衬底上合成金纳米颗粒敏化的氧化锌纳米铅笔阵列。相对于Ag/AgCl，金-氧化锌纳米铅笔阵列在1V时产生的光电流约为1.5 mA cm(-2)。光电流增强归因于金纳米颗粒的表面等离子体共振效应以及光生电子-空穴对寿命的延长。氧化锌稳定性的提高归因于金纳米颗粒实现的等离子体共振能量转移过程，该过程增强了氧化锌半导体小的、明确位置处的电场强度。