Direct Z-scheme MoSe2/TiO2 heterostructure with improved piezoelectric and piezo-photocatalytic performance

Han，Qing1; Du，Shiwen1,2; Wang，Yumin1; Han，Ziwu1; Li，Hongjing1; Xu，Hu3; Fang，Pengfei1

2022-09-15

10.1016/j.jcis.2022.04.139

JOURNAL OF COLLOID AND INTERFACE SCIENCE   影响因子和分区

0021-9797

1095-7103

Nano-semiconductor materials coupled with piezoelectric effect have received extensive attention due to their wide application in catalysis. In this work, few-layered MoSe nanosheets were grown vertically on TiO nanorods (TNr) to synthesize a direct Z-scheme heterojunction, exhibiting efficient piezocatalytic and piezo-photocatalytic performance. The MoSe/TNr heterostructure exhibited superior piezoelectric degradation efficiency, successfully removing over 98% of RhB within 360 s under continuous magnetic stirring in dark. Compared with piezocatalysis, the piezo-photocatalytic system possessed higher degradation efficiency and cycle stability. Furthermore, a piezo-photoelectric synergistic effect of nanocomposites was observed by current outputs. Under stirring conditions, the current density of depleted MoSe/TNr and MoSe nanosheets were respectively 6.3 μA/cm and 5.5 μA/cm. When light and stirring were applied, the MoSe/TNr current density increased twice to 13.2 μA/cm, while the MoSe nanosheets didn't exhibit improvement. Through the direct Z-scheme heterojunction of MoSe/TNr, photoexcitation and piezoelectric polarization work together to effectively replenish carriers under light irradiation, and then rapidly separate free charges through piezopotential. This work broadens the application prospects of piezocatalysis and piezo-photocatalysis in renewable energy harvesting and water purification.

Direct Z-scheme heterojunction MoSe2 nanosheets Piezo-photocatalysis Piezoelectric effect

SCI ; EI

英语

其他

National Natural Science Foundation of China[11927808];

Chemistry

Chemistry, Physical

WOS:000799624100002

ACADEMIC PRESS INC ELSEVIER SCIENCE

20221912100954

Degradation ; Energy harvesting ; Heterojunctions ; Nanorods ; Nanosheets ; Photocatalysis ; Piezoelectricity ; Rhodium compounds ; Titanium dioxide

Energy Conversion Issues:525.5 ; Electricity: Basic Concepts and Phenomena:701.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Inorganic Compounds:804.2 ; Solid State Physics:933

CHEMISTRY

2-s2.0-85129738597

Scopus

1.School of Physics and Technology,Key Laboratory of Nuclear Solid State Physics Hubei Province,Wuhan University,Wuhan,430072,China
2.State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian,116023,China
3.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China

Han，Qing,Du，Shiwen,Wang，Yumin,et al. Direct Z-scheme MoSe2/TiO2 heterostructure with improved piezoelectric and piezo-photocatalytic performance[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2022,622:637-651.

Han，Qing.,Du，Shiwen.,Wang，Yumin.,Han，Ziwu.,Li，Hongjing.,...&Fang，Pengfei.(2022).Direct Z-scheme MoSe2/TiO2 heterostructure with improved piezoelectric and piezo-photocatalytic performance.JOURNAL OF COLLOID AND INTERFACE SCIENCE,622,637-651.

Han，Qing,et al."Direct Z-scheme MoSe2/TiO2 heterostructure with improved piezoelectric and piezo-photocatalytic performance".JOURNAL OF COLLOID AND INTERFACE SCIENCE 622(2022):637-651.