Advanced   Register
IMR OpenIR  > 中国科学院金属研究所  > 期刊论文

题名: Efficient photocatalytic oxygen production over Ca-modified LaTiO2N
作者: Wu, Fangfang;  Liu, Gang;  Xu, Xiaoxiang
发表日期: 2017-2-1
摘要: LaTiO2N has been considered a promising candidate for efficient photocatalytic water splitting. However, its photocatalytic activity is often hampered by the presence of structural defects and poor charge mobility. In this work, we introduced Ca into the crystal structure of LaTiO2N via a simple co-precipitation method and investigated the photocatalytic and photoelectrochemical properties for the full range solid solution La1-xCaxTiO2+yN1-y (0 <= x, y <= 1). Our results show that incorporating Ca into LaTiO2N induces a strong structural shrinkage as well as a space group change from I mma to P nma around a middle doping point (x = 0.5). The presence of Ca effectively boosts the photocatalytic oxygen production and aids photocurrent extraction for LaTiO2N. The best photocatalytic activity was achieved for sample La0.3Ca0.7TiO2.7N0.3 with oxygen production rate similar to 66.96 mu mol/h under visible light illumination (lambda >= 420 nm), corresponding to apparent quantum efficiency similar to 3.13%. XPS analysis revealed a substantial reduction in surface Ti3+ species and a removal of A-site cation segregation for samples containing Ca. Further photoelectrochemical analysis highlights the critical role of Ca in enhancing the charge mobility of LaTiO2N. The better photocatalytic performance of Ca-modified LaTiO2N can be understood as a result of defect removal, high charge mobility, and improved surface charge migration pathways that considerably prolong the lifetimes of photogenerated charges. (C) 2016 Elsevier Inc. All rights reserved.
Appears in Collections:中国科学院金属研究所_期刊论文

Files in This Item:

There are no files associated with this item.

Recommended Citation:
Wu, Fangfang,Liu, Gang,Xu, Xiaoxiang. Efficient Photocatalytic Oxygen Production Over Ca-modified Latio2n[J]. Journal Of Catalysis,2017,346:10-20.

SCI Citaion Data:
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Wu, Fangfang]'s Articles
 [Liu, Gang]'s Articles
 [Xu, Xiaoxiang]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Wu, Fangfang]‘s Articles
 [Liu, Gang]‘s Articles
 [Xu, Xiaoxiang]‘s Articles
Scirus search
 Similar articles in Scirus
Related Copyright Policies
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to  Add to Digg  Add to Reddit 
所有评论 (0)
内 容:
Email:  *
验证码:   刷新
标 题:
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.



Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院金属研究所  -Feedback
Powered by CSpace