Few-layer MoS2 nanosheet-coated KNbO3 nanowire heterostructures: piezo-photocatalytic effect enhanced hydrogen production and organic pollutant degradation

Jia, Shufan1; Su, Yiping1,2; Zhang, Boping1; Zhao, Zhicheng2; Li, Shun2,3; Zhang, Yunfei1; Li, Pucai1; Xu, Mingyuan1; Ren, Ran4

2019-04-28

10.1039/c9nr00246d

Nanoscale   影响因子和分区

2040-3364

2040-3372

The introduction of a piezoelectric field has been considered as a promising strategy to enhance photocatalytic activity by inhibiting the recombination of photogenerated electron-hole pairs in semiconductor photocatalysts. In this work, a novel heterostructured photocatalyst that combines piezoelectric KNbO3 nanowires and few-layer MoS2 nanosheets was designed and synthesized via a simple two-step hydrothermal method. Under simulated solar light illumination, the KNbO3/MoS2 heterostructures showed significantly enhanced photocatalytic H-2 production and organic pollutant (e.g. rhodamine B) degradation efficiency, compared to pristine KNbO3 nanowires and MoS2 nanosheets. The photocatalytic activity can be further improved greatly by co-utilizing the solar and mechanical energy provided by ultrasonic vibration. The enhancement of photocatalytic activity can be attributed to the promotion of charge separation caused by the synergetic effect of the formation of a heterojunction and the internal piezoelectric field induced by mechanical vibration. Our findings may provide insight into strategies for designing highly efficient piezoelectric material-based nanocomposites for various photocatalytic applications such as environmental remediation and renewable energy production.

SCI ; EI

英语

ESI高被引

通讯

Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control[2017B030301012]

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

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

WOS:000467776400015

ROYAL SOC CHEMISTRY

20192106943595

Degradation ; Dyes ; Heterojunctions ; Hydrogen production ; Layered semiconductors ; Molybdenum compounds ; Nanosheets ; Nanowires ; Niobium compounds ; Organic pollutants ; Photocatalysis ; Photocatalytic activity ; Piezoelectricity ; Sulfur compounds ; Ultrasonic effects ; Vibrations (mechanical)

Gas Fuels:522 ; Electricity: Basic Concepts and Phenomena:701.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Ultrasonic Waves:753.1 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Organic Compounds:804.1 ; Mechanics:931.1 ; Solid State Physics:933

Web of Science

1.Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Key Lab New Energy Mat & Technol, Beijing 100083, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Soil & Groundwater Pollut, Shenzhen 518055, Guangdong, Peoples R China
3.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen 518055, Guangdong, Peoples R China
4.Univ Sci & Technol Beijing, Dongling Sch Econ & Management, Beijing 100083, Peoples R China

Jia, Shufan,Su, Yiping,Zhang, Boping,et al. Few-layer MoS2 nanosheet-coated KNbO3 nanowire heterostructures: piezo-photocatalytic effect enhanced hydrogen production and organic pollutant degradation[J]. Nanoscale,2019,11(16):7690-7700.

Jia, Shufan.,Su, Yiping.,Zhang, Boping.,Zhao, Zhicheng.,Li, Shun.,...&Ren, Ran.(2019).Few-layer MoS2 nanosheet-coated KNbO3 nanowire heterostructures: piezo-photocatalytic effect enhanced hydrogen production and organic pollutant degradation.Nanoscale,11(16),7690-7700.

Jia, Shufan,et al."Few-layer MoS2 nanosheet-coated KNbO3 nanowire heterostructures: piezo-photocatalytic effect enhanced hydrogen production and organic pollutant degradation".Nanoscale 11.16(2019):7690-7700.