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Title: Edge Dislocations Induce Improved Photocatalytic Efficiency of Colored TiO2

Abstract

Titanium oxide is the most widely used material for photocatalytic applications due to its low cost and environmental friendliness. One of the grand challenges to improve its energy conversion efficiency is to utilize more visible light while inhibiting the recombination of photo-generated electrons and holes. We use a one-step hydro-solvothermal method to obtain colored ultra-fine nanowires of rutile and nanoparticles of anatase with edge dislocations, which induced broadened visible solar absorption (400-900 nm) and improved photocatalytic efficiency up to 1.8 times that of rutile or anatase without defects. Enhanced photocatalytic activity of these structures is demonstrated by photodegrading methylene blue measurements under simulated solar light irradiation. Results show the existence of Ti3+, induced by edge dislocations, and subsequent electronic band structure-property relationships. This work highlights a strategy for generating sufficient desired defects in TiO2 nanostructures, leading to broadened visible solar absorption and improved photocatalytic efficiency under visible light irradiation.

Authors:
 [1];  [2];  [2]; ORCiD logo [2];  [2]; ORCiD logo [2];  [3];  [2];  [4]; ORCiD logo [2]
  1. UNIVERSITY PROGRAMS
  2. BATTELLE (PACIFIC NW LAB)
  3. Tongji University
  4. University of California, Riverside
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1572485
Report Number(s):
PNNL-SA-145888
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Advanced Materials Interfaces
Additional Journal Information:
Journal Volume: 6; Journal Issue: 17
Country of Publication:
United States
Language:
English

Citation Formats

Ren, Peng, Song, Miao, Lee, Jaewon, Zheng, Jian, Lu, Zexi, Engelhard, Mark H., Yang, Xiuchun, Li, Xiaolin, Kisailus, David, and Li, Dongsheng. Edge Dislocations Induce Improved Photocatalytic Efficiency of Colored TiO2. United States: N. p., 2019. Web. doi:10.1002/admi.201901121.
Ren, Peng, Song, Miao, Lee, Jaewon, Zheng, Jian, Lu, Zexi, Engelhard, Mark H., Yang, Xiuchun, Li, Xiaolin, Kisailus, David, & Li, Dongsheng. Edge Dislocations Induce Improved Photocatalytic Efficiency of Colored TiO2. United States. doi:10.1002/admi.201901121.
Ren, Peng, Song, Miao, Lee, Jaewon, Zheng, Jian, Lu, Zexi, Engelhard, Mark H., Yang, Xiuchun, Li, Xiaolin, Kisailus, David, and Li, Dongsheng. Fri . "Edge Dislocations Induce Improved Photocatalytic Efficiency of Colored TiO2". United States. doi:10.1002/admi.201901121.
@article{osti_1572485,
title = {Edge Dislocations Induce Improved Photocatalytic Efficiency of Colored TiO2},
author = {Ren, Peng and Song, Miao and Lee, Jaewon and Zheng, Jian and Lu, Zexi and Engelhard, Mark H. and Yang, Xiuchun and Li, Xiaolin and Kisailus, David and Li, Dongsheng},
abstractNote = {Titanium oxide is the most widely used material for photocatalytic applications due to its low cost and environmental friendliness. One of the grand challenges to improve its energy conversion efficiency is to utilize more visible light while inhibiting the recombination of photo-generated electrons and holes. We use a one-step hydro-solvothermal method to obtain colored ultra-fine nanowires of rutile and nanoparticles of anatase with edge dislocations, which induced broadened visible solar absorption (400-900 nm) and improved photocatalytic efficiency up to 1.8 times that of rutile or anatase without defects. Enhanced photocatalytic activity of these structures is demonstrated by photodegrading methylene blue measurements under simulated solar light irradiation. Results show the existence of Ti3+, induced by edge dislocations, and subsequent electronic band structure-property relationships. This work highlights a strategy for generating sufficient desired defects in TiO2 nanostructures, leading to broadened visible solar absorption and improved photocatalytic efficiency under visible light irradiation.},
doi = {10.1002/admi.201901121},
journal = {Advanced Materials Interfaces},
number = 17,
volume = 6,
place = {United States},
year = {2019},
month = {9}
}