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

题名: Hollow CaTiO3 cubes modified by La/Cr co-doping for efficient photocatalytic hydrogen production
作者: Wang, RN;  Ni, S;  Liu, G;  Xu, XX
发表日期: 2018-6-5
摘要: In this work, we have applied microstructure management and doping techniques to conventional wide band gap semiconductor CaTiO3 with the aim to improve its light absorption and photocatalytic activity. A series of La/Cr co-doping hollow CaTiO3 cubes have been successfully prepared by a template-free hydrothermal method. Their crystal structures, microstructures, optical absorption and photocatalytic hydrogen production have been systematically investigated. Our results suggest that hollow CaTiO3 owns a higher light absorption than solid one and demonstrates a much better photocatalytic activity both under full range (lambda >= 250 nm) and visible light illumination (lambda >= 400 nm). These improvements probably originate from the peculiar hollow microstructures that increase photon-matter interactions and shorten the charge migration pathways. The photocatalytic activity for hydrogen production has been further studied by varying the La/Cr content in CaTiO3. An optimal doping point at 5% La/Cr doping level has been reached for full range illumination with apparent quantum efficiency approaching similar to 2.41%. Nevertheless, the activity under visible light illumination shows a clear dependence on doping level with highest apparent quantum efficiency similar to 0.40% at 20% La/Cr doping level. DFT calculations reveal the critical role of Cr in forming a new spin-polarized valence band inside the original band gap of CaTiO3 therefore is responsible for band gap reduction and visible light photocatalysis. This work here highlights the importance of microstructure control to the photocatalytic performance and shall shed a light on the design and development of efficient photocatalytic materials/systems.
刊名: APPLIED CATALYSIS B-ENVIRONMENTAL
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:
Wang, RN,Ni, S,Liu, G,et al. Hollow Catio3 Cubes Modified By La/cr Co-doping For Efficient Photocatalytic Hydrogen Production[J]. Applied Catalysis B-environmental,2018,225:139-147.

SCI Citaion Data:
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Wang, RN]'s Articles
 [Ni, S]'s Articles
 [Liu, G]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Wang, RN]‘s Articles
 [Ni, S]‘s Articles
 [Liu, G]‘s Articles
Scirus search
 Similar articles in Scirus
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
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