标题:Carbon nanosheet facilitated charge separation and transfer between molybdenum carbide and graphitic carbon nitride toward efficient photocatalytic H-2 production
作者:Zou, Yajun; Ma, Dandan; Sun, Diankun; Mao, Siman; He, Chi; Wang, Zeyan; Ji, Xin; Shi, Jian-Wen
作者机构:[Zou, Yajun; Ma, Dandan; Sun, Diankun; Mao, Siman; Ji, Xin; Shi, Jian-Wen] Xi An Jiao Tong Univ, Sch Elect Engn, Ctr Nanomat Renewable Energy, State K 更多
通讯作者:Shi, JW
通讯作者地址:[Shi, JW]Xi An Jiao Tong Univ, Sch Elect Engn, Ctr Nanomat Renewable Energy, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Shaanxi, Peop 更多
来源:APPLIED SURFACE SCIENCE
出版年:2019
卷:473
页码:91-101
DOI:10.1016/j.apsusc.2018.12.102
关键词:Photocatalysis; H-2 evolution; Water splitting; Carbon nitride;; Heterojunction
摘要:Interfacial manipulation of nanostructured heterojunction photocatalysts to enhance charge separation and transfer is highly desirable to achieve a high photocatalytic activity. In this work, a well-designed non-noblemetal Mo2C@C/g-C3N4 heterostructure is constructed, in which the intercalated carbon nanosheets serve as a binder to form an excellent interfacial contact between Mo2C and g-C3N4. In addition, large quantities of carbon quantum dotsare found to be homogeneously embedded in the carbon nanosheets. The as-obtained Mo2C@C/gC(3)N(4) hybrid exhibits a remarkably improved photocatalytic H-2 evolution rate of 52.1 mu mol h(-1) under visible-light irradiation (lambda >= 420 nm) without co-catalyst, which is up to nearly 260 times higher than that of pristine gC(3)N(4)(0.2 mu mol h(-1)) under the same conditions. The significant increase in photocatalytic activity mainly results from the fast charge migration and separation between Mo2C and g-C3N4 facilitated by the conducing carbon nanosheets as an efficient electron mediator. Moreover, the carbon quantum dots embedded in the carbon support also promotes solar energy utilization. This work highlights a feasible strategy to explore highly efficient photocatalysts via interfacial engineering on heterojunction composites.
收录类别:SCOPUS;SCIE
Scopus被引频次:1
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85058542875&doi=10.1016%2fj.apsusc.2018.12.102&partnerID=40&md5=16424fc35fcaea5280cef248faabe249
TOP