Enhanced catalytic performance by multi-field coupling in KNbO3 nanostructures: Piezo-photocatalytic and ferro-photoelectrochemical effects

Yu, Dongfang1; Liu, Zhenghao2; Zhang, Jianming3; Li, Shun1,4; Zhao, Zhicheng1; Zhu, Lifeng5; Liu, Weishu6; Lin, Yuanhua7; Liu, Hong8; Zhang, Zuotai1

2019-04

10.1016/j.nanoen.2019.01.095

Nano Energy   影响因子和分区

2211-2855

2211-3282

The coupling between piezo-/ferroelectricity and photoexcitation in semiconductors creates unique opportunities to enhance the photocatalytic and photoelectrochemical (PEC) performance. It is important to develop desirable piezo-/ferroelectric nanostructures to realize the full potential of polarization-modulated built-in electric fields that can effectively separate excited electron/hole pairs. In this work, taking KNbO3 as a representative material, we show that two-dimensional nanosheets exhibit greatly improved piezo-photocatalytic degradation efficiency for organic dyes compared to that of nanocubes. In addition, effective tuning of the PEC water splitting property by manipulating the ferroelectric polarization was observed in these KNbO3 nanostructures, demonstrating versatile and tuneable devices for solar energy conversion. By changing the poling configuration, a significant photocurrent density enhancement of 55% was achieved for KNbO3 nanosheets, which is much greater than the 25% enhancement observed for the nanocube counterparts. These results could be attributed to the larger piezo-/ferroelectric response in the nanosheets as determined by piezoresponse force microscopy analysis and piezoelectric potential simulation based on the finite element method. Our findings may provide insights into strategies for designing highly efficient piezo-/ferroelectric nanomaterials for solar energy conversion.

Nanosheet Solar water splitting Piezocatalytic effect Ferroelectric polarization Piezoresponse force microscopy

SCI ; EI

英语

ESI高被引

第一 ; 通讯

NSFC[51602143]

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

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

WOS:000461433600079

ELSEVIER SCIENCE BV

20190706500672

Degradation ; Electric fields ; Energy conversion ; Ferroelectricity ; Nanosheets ; Photoelectrochemical cells ; Polarization ; Scanning probe microscopy ; Solar energy

Energy Conversion Issues:525.5 ; Solar Energy and Phenomena:657.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Electric Batteries:702.1 ; Nanotechnology:761 ; Chemistry:801 ; Chemical Reactions:802.2 ; Solid State Physics:933

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Soil & Groundwater Pollut, Shenzhen 518055, Peoples R China
2.Chinese Acad Sci, Shenzhen Key Lab Nanobiomech, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China
3.Jiangsu Univ, Sch Chem & Chem Engn, Zhenjiang 212013, Jiangsu, Peoples R China
4.Southern Univ Sci & Technol, SUSTech Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China
5.Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
6.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
7.Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China
8.Univ Jinan, IAIR, Jinan 250022, Shandong, Peoples R China

Yu, Dongfang,Liu, Zhenghao,Zhang, Jianming,et al. Enhanced catalytic performance by multi-field coupling in KNbO3 nanostructures: Piezo-photocatalytic and ferro-photoelectrochemical effects[J]. Nano Energy,2019,58:695-705.

Yu, Dongfang.,Liu, Zhenghao.,Zhang, Jianming.,Li, Shun.,Zhao, Zhicheng.,...&Zhang, Zuotai.(2019).Enhanced catalytic performance by multi-field coupling in KNbO3 nanostructures: Piezo-photocatalytic and ferro-photoelectrochemical effects.Nano Energy,58,695-705.

Yu, Dongfang,et al."Enhanced catalytic performance by multi-field coupling in KNbO3 nanostructures: Piezo-photocatalytic and ferro-photoelectrochemical effects".Nano Energy 58(2019):695-705.