Stepwise irradiative engineering based on Einstein quantum theory for promoting PVA/TiO2 photocatalytic activity at minimized irradiance consumption

Hu，Wenyu1,3; Zhao，Lin1; Deng，Yong1,3; Li，Ximin2; Qiu，Yang3; Hu，Xulin4; Bai，Xueyuan5,6; Zheng，Zhou5; Ma，Jian1; Wu，Bo1; Chen，Longqing7; Qiu，Wenbin7; Li，Chunhong2,5; Peng，Biyou2; Wang，Xiaoyi1,5,8; Chen，Gang2; Han，Rui2; Jin，Chaoyuan8,9,10; Cui，Xudong5

2022-11-01

10.1016/j.apsusc.2022.154145

APPLIED SURFACE SCIENCE   Impact Factor & Quartile

0169-4332

Promoting photocatalytic performance by modulating the external irradiation field is a new concept in both photocatalytic theory and applications. Here, based on the Einstein rate equation, we have firstly demonstrated that the duration of atom activity can be prolonged by decoupling the weak excitation towards ultra-violet spectra or saturating the irradiative intensity at material central frequency. Guided by the theoretical deduction, the wavelength dispersive in-situ florescence spectroscopy and stepwise irradiative technique were then employed to give experimental evidences, where the theory derived optimal irradiation field was validated for promoting photocatalytic activity of Polyvinyl Alcohol (PVA)/TiO hybrid materials. By periodically projecting the optimal excitation instead of continuous visible illumination, the photocatalytic performance can be improved by 15% with nearly halved irradiance consumption (55%). It is believed that these findings might push photocatalytic efficiency into higher steps with the assistance of a deep understanding of irradiative theory and engineering.

Energy-saving In-situ fluorescence spectra Minimized irradiance consumption Photocatalysis Stepwise irradiation theory

EI

English

Others

Health Canada[2020NTD03];

20222912384763

Energy conservation ; Hybrid materials ; Photocatalytic activity ; Quantum theory

Energy Conservation:525.2 ; Physical Chemistry:801.4 ; Quantum Theory; Quantum Mechanics:931.4

MATERIALS SCIENCE

2-s2.0-85134308754

Scopus

1.Southwest Minzu University,State Ethnic Affairs Commission,Chengdu,610041,China
2.School of Materials Science and Engineering,Xihua University,Chengdu,610039 Sichuan,China
3.Materials Characterization and Preparation Center and Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
4.Hospital of Chengdu University,Chengdu University,Sichuan,610081,China
5.Institute of Chemical Materials,China Academy of Engineering Physics,Mianyang,621900,China
6.School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing,210094,China
7.Key laboratory of Radiation Physics and Technology of Ministry of Education,Institute of Nuclear Science and Technology,Sichuan University,Chengdu,610064,China
8.Institute of Microelectronics and Nanoelectronics,College of Information Science and Electronic Engineering,Zhejiang University,Hangzhou,310007,China
9.Zhejiang Laboratory,Hangzhou,311121,China
10.International Joint Innovation Center,Zhejiang University,Haining,314400,China

Hu，Wenyu,Zhao，Lin,Deng，Yong,et al. Stepwise irradiative engineering based on Einstein quantum theory for promoting PVA/TiO2 photocatalytic activity at minimized irradiance consumption[J]. APPLIED SURFACE SCIENCE,2022,601.

Hu，Wenyu.,Zhao，Lin.,Deng，Yong.,Li，Ximin.,Qiu，Yang.,...&Cui，Xudong.(2022).Stepwise irradiative engineering based on Einstein quantum theory for promoting PVA/TiO2 photocatalytic activity at minimized irradiance consumption.APPLIED SURFACE SCIENCE,601.

Hu，Wenyu,et al."Stepwise irradiative engineering based on Einstein quantum theory for promoting PVA/TiO2 photocatalytic activity at minimized irradiance consumption".APPLIED SURFACE SCIENCE 601(2022).