Preparation and enhanced photoelectrochemical performance of selenite-sensitized zinc oxide core/shell composite structure

TY - JOUR

T1 - Preparation and enhanced photoelectrochemical performance of selenite-sensitized zinc oxide core/shell composite structure

AU - Hong, Tiantian

AU - Liu, Zhifeng

AU - Liu, Hui

AU - Liu, Junqi

AU - Zhang, Xueqi

AU - Han, Jianhua

AU - Guo, Keying

AU - Wang, Bo

N1 - Publisher Copyright: © The Royal Society of Chemistry 2015.

PY - 2015

Y1 - 2015

N2 - A fast, versatile and low-cost hydrothermal chemical synthesis based on ion-exchange has been used to deposit a shell of cupric selenite onto vertically aligned zinc oxide nanorod arrays with a buffer layer of zinc selenite for photoelectrochemical water splitting. In the present work, detailed growth mechanisms for single shell of zinc selenite composite structure and double shells of zinc selenite and cupric selenite closed nanotubes based on zinc oxide core are discussed. The enhanced optical property and the improved photoelectrochemical performance are characterized. On the basis of cupric selenite outer shell, such a novel core/shell nanostructure provides a high photocatalytic activity, and the photocurrent density is up to 5.70 mA cm-2. This promising result is probably due to the improved absorption efficiency, enhanced photoelectron collection process and reduced recombination rate including photoelectron injection and charge transportation. The double shells based on zinc oxide composite structure can render this new material promising in photoelectrochemical water splitting.

AB - A fast, versatile and low-cost hydrothermal chemical synthesis based on ion-exchange has been used to deposit a shell of cupric selenite onto vertically aligned zinc oxide nanorod arrays with a buffer layer of zinc selenite for photoelectrochemical water splitting. In the present work, detailed growth mechanisms for single shell of zinc selenite composite structure and double shells of zinc selenite and cupric selenite closed nanotubes based on zinc oxide core are discussed. The enhanced optical property and the improved photoelectrochemical performance are characterized. On the basis of cupric selenite outer shell, such a novel core/shell nanostructure provides a high photocatalytic activity, and the photocurrent density is up to 5.70 mA cm-2. This promising result is probably due to the improved absorption efficiency, enhanced photoelectron collection process and reduced recombination rate including photoelectron injection and charge transportation. The double shells based on zinc oxide composite structure can render this new material promising in photoelectrochemical water splitting.

UR - http://www.scopus.com/inward/record.url?scp=84922900717&partnerID=8YFLogxK

U2 - 10.1039/c4ta05973e

DO - 10.1039/c4ta05973e

M3 - 文章

AN - SCOPUS:84922900717

SN - 2050-7488

VL - 3

SP - 4239

EP - 4247

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 8

ER -