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Title: MoS{sub 2}@ZnO nano-heterojunctions with enhanced photocatalysis and field emission properties

Abstract

The molybdenum disulfide (MoS{sub 2})@ZnO nano-heterojunctions were successfully fabricated through a facile three-step synthetic process: prefabrication of the ZnO nanoparticles, the synthesis of MoS{sub 2} nanoflowers, and the fabrication of MoS{sub 2}@ZnO heterojunctions, in which ZnO nanoparticles were uniformly self-assembled on the MoS{sub 2} nanoflowers by utilizing polyethyleneimine as a binding agent. The photocatalytic activities of the composite samples were evaluated by monitoring the photodegradation of methylene blue (MB). Compared with pure MoS{sub 2} nanoflowers, the composites show higher adsorption capability in dark and better photocatalytic efficiency due to the increased specific surface area and improved electron-hole pair separation. After irradiation for 100 min, the remaining MB in solution is about 7.3%. Moreover, the MoS{sub 2}@ZnO heterojunctions possess enhanced field emission properties with lower turn-on field of 3.08 V μm{sup −1}and lower threshold field of 6.9 V μm{sup −1} relative to pure MoS{sub 2} with turn-on field of 3.65 V μm{sup −1} and threshold field of 9.03 V μm{sup −1}.

Authors:
; ; ; ;  [1]
  1. Key Laboratory of Polar Materials and Devices (Ministry of Education of China), Department of Electronic Engineering, East China Normal University, Shanghai 200241 (China)
Publication Date:
OSTI Identifier:
22314619
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 6; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; FABRICATION; FIELD EMISSION; HETEROJUNCTIONS; HOLES; IRRADIATION; MATHEMATICAL SOLUTIONS; METHYLENE BLUE; MOLYBDENUM SULFIDES; NANOPARTICLES; PHOTOCATALYSIS; SPECIFIC SURFACE AREA; VANADIUM 65; ZINC OXIDES

Citation Formats

Tan, Ying-Hua, Yu, Ke, E-mail: yk5188@263.net, Li, Jin-Zhu, Fu, Hao, and Zhu, Zi-Qiang. MoS{sub 2}@ZnO nano-heterojunctions with enhanced photocatalysis and field emission properties. United States: N. p., 2014. Web. doi:10.1063/1.4893020.
Tan, Ying-Hua, Yu, Ke, E-mail: yk5188@263.net, Li, Jin-Zhu, Fu, Hao, & Zhu, Zi-Qiang. MoS{sub 2}@ZnO nano-heterojunctions with enhanced photocatalysis and field emission properties. United States. doi:10.1063/1.4893020.
Tan, Ying-Hua, Yu, Ke, E-mail: yk5188@263.net, Li, Jin-Zhu, Fu, Hao, and Zhu, Zi-Qiang. Thu . "MoS{sub 2}@ZnO nano-heterojunctions with enhanced photocatalysis and field emission properties". United States. doi:10.1063/1.4893020.
@article{osti_22314619,
title = {MoS{sub 2}@ZnO nano-heterojunctions with enhanced photocatalysis and field emission properties},
author = {Tan, Ying-Hua and Yu, Ke, E-mail: yk5188@263.net and Li, Jin-Zhu and Fu, Hao and Zhu, Zi-Qiang},
abstractNote = {The molybdenum disulfide (MoS{sub 2})@ZnO nano-heterojunctions were successfully fabricated through a facile three-step synthetic process: prefabrication of the ZnO nanoparticles, the synthesis of MoS{sub 2} nanoflowers, and the fabrication of MoS{sub 2}@ZnO heterojunctions, in which ZnO nanoparticles were uniformly self-assembled on the MoS{sub 2} nanoflowers by utilizing polyethyleneimine as a binding agent. The photocatalytic activities of the composite samples were evaluated by monitoring the photodegradation of methylene blue (MB). Compared with pure MoS{sub 2} nanoflowers, the composites show higher adsorption capability in dark and better photocatalytic efficiency due to the increased specific surface area and improved electron-hole pair separation. After irradiation for 100 min, the remaining MB in solution is about 7.3%. Moreover, the MoS{sub 2}@ZnO heterojunctions possess enhanced field emission properties with lower turn-on field of 3.08 V μm{sup −1}and lower threshold field of 6.9 V μm{sup −1} relative to pure MoS{sub 2} with turn-on field of 3.65 V μm{sup −1} and threshold field of 9.03 V μm{sup −1}.},
doi = {10.1063/1.4893020},
journal = {Journal of Applied Physics},
number = 6,
volume = 116,
place = {United States},
year = {Thu Aug 14 00:00:00 EDT 2014},
month = {Thu Aug 14 00:00:00 EDT 2014}
}