Few-layer transition metal dichalcogenides (MoS2, WS2, and WSe2) for water splitting and degradation of organic pollutants: Understanding the piezocatalytic effect

Li，Shun1,2,3; Zhao，Zhicheng1; Yu，Dongfang1; Zhao，Jin Zhu2,4; Su，Yiping1; Liu，Yong5; Lin，Yuanhua6; Liu，Weishu7; Xu，Hu4; Zhang，Zuotai1,3

2019-12-01

10.1016/j.nanoen.2019.104083

Nano Energy   影响因子和分区

2211-2855

2211-3282

Piezoelectric materials have promising potential for converting mechanical energy into chemical energy (i.e. piezocatalysis) by coupling the piezotronic effect with electrochemical processes. Herein, piezocatalytic water splitting and degradation of organic pollutants have been realized in three few-layer transition metal dichalcogenides (TMDs) (namely MoS, WS, and WSe). We showed that the H evolution rate reached 29.1, 15.4, and 11.3 μmol g h for MoS, WS, and WSe nanosheets respectively, under mechanical force provided by ultrasonic vibration. Moreover, their piezocatalytic activities can be further promoted by loading with heavy metal (e.g. Pt and Au) nanoparticles. In addition, all the samples exhibited good piezocatalytic degradation efficiency and reusability toward different organic pollutants (e.g. tetracycline and Rhodamine B). We also provided a systematic investigation on the piezoelectricity by piezoresponse force microscopy and piezoelectric stress coefficients (e) by first-principle calculations of these three studied compounds, which are accordant with the piezocatalytic results. The present work clearly demonstrates a high correlation between piezoelectricity and mechanical vibration induced catalytic reactions in few-layer TMDs and may provide insight into the mechanisms of piezocatalytic effect.

Hydrogen evolution Piezotronic effect Pollution degradation Two-dimensional materials Ultrasonic vibration

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[51802143] ; Science, Technology and Innovation Commission of Shenzhen Municipality[JCYJ20170817111443306] ; Science, Technology and Innovation Commission of Shenzhen Municipality[JCYJ20180504165648211] ; Shenzhen Peacock Plan[KQTD20160226195840229]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000503062400005

Elsevier Ltd

20193707435393

Catalysis ; Crystallography ; Degradation ; Heavy metals ; Layered semiconductors ; Metal nanoparticles ; Molybdenum compounds ; Piezoelectric devices ; Piezoelectricity ; Reusability ; Scanning probe microscopy ; Selenium compounds ; Transition metals ; Tungsten compounds ; Ultrasonic effects ; Ultrasonic waves ; Vibrations (mechanical) ; Water pollution ; Water treatment

Water Treatment Techniques:445.1 ; Water Pollution:453 ; Metallurgy and Metallography:531 ; Electricity: Basic Concepts and Phenomena:701.1 ; Ultrasonic Waves:753.1 ; Nanotechnology:761 ; Chemistry:801 ; Chemical Reactions:802.2 ; Organic Compounds:804.1 ; Mechanics:931.1 ; Crystalline Solids:933.1

2-s2.0-85072063183

Scopus

1.School of Environmental Science and EngineeringGuangdong Provincial Key Laboratory of Soil and Groundwater Pollution ControlSouthern University of Science and Technology,Shenzhen,518055,China
2.Academy for Advanced Interdisciplinary StudiesSouthern University of Science and Technology,Shenzhen,518055,China
3.Shenzhen Clean Energy Research Institute,Shenzhen,China
4.Department of Physics & Institute for Quantum Science and EngineeringSouthern University of Science and Technology,Shenzhen,518055,China
5.Foshan (Southern China) Institute for New Materials,Foshan,528200,China
6.School of Materials Science and EngineeringTsinghua University,Beijing,100084,China
7.Department of Materials Science and EngineeringSouthern University of Science and Technology,Shenzhen,518055,China

Li，Shun,Zhao，Zhicheng,Yu，Dongfang,et al. Few-layer transition metal dichalcogenides (MoS2, WS2, and WSe2) for water splitting and degradation of organic pollutants: Understanding the piezocatalytic effect[J]. Nano Energy,2019,66.

Li，Shun.,Zhao，Zhicheng.,Yu，Dongfang.,Zhao，Jin Zhu.,Su，Yiping.,...&Zhang，Zuotai.(2019).Few-layer transition metal dichalcogenides (MoS2, WS2, and WSe2) for water splitting and degradation of organic pollutants: Understanding the piezocatalytic effect.Nano Energy,66.

Li，Shun,et al."Few-layer transition metal dichalcogenides (MoS2, WS2, and WSe2) for water splitting and degradation of organic pollutants: Understanding the piezocatalytic effect".Nano Energy 66(2019).