Improvement in photocatalytic activity of TiO2 under visible irradiation through addition of N-TiO2

In Cheol Kang; Qiwu Zhang; Shu Yin; Tsugio Sato; Fumio Saito

doi:10.1021/es702932m

Improvement in photocatalytic activity of TiO₂ under visible irradiation through addition of N-TiO₂

In Cheol Kang, Qiwu Zhang, Shu Yin, Tsugio Sato, Fumio Saito

IMRAM - Division of Inorganic Material Research

Tohoku University

Research output: Contribution to journal › Article › peer-review

97 Citations (Scopus)

Abstract

This work is focused on improvement in photocatalytic activity of anatase-TiO₂ (a-TiO₂) photocatalyst under visible-light irradiation by adding nitrogen-doped TiO₂ (N-TiO₂) for depression of recombination rate between photoexcited electron and hole. The composites (a-TiO₂/N-TiO₂) were prepared by grinding in ethanol solvent at 200 rpm for 15 min with change in weight ratio of N-TiO ₂. In addition to the characterizations by X-ray diffraction and X-ray photoelectron spectroscopy, measurements of existing singlet oxygen by chemiluminescens method and photocatalytic activity by using NO_x decomposition were conducted. The increases in singlet oxygen and photocatalytic activity have been observed and the phenomena are discussed based on the efficient prevention of recombination between photoexcited electron and hole within the prepared composite.

Original language	English
Pages (from-to)	3622-3626
Number of pages	5
Journal	Environmental Science & Technology
Volume	42
Issue number	10
DOIs	https://doi.org/10.1021/es702932m
Publication status	Published - 2008 May 15

Access to Document

10.1021/es702932m

Cite this

@article{92d3d98fc17d49cda879def78cb2ba14,

title = "Improvement in photocatalytic activity of TiO2 under visible irradiation through addition of N-TiO2",

abstract = "This work is focused on improvement in photocatalytic activity of anatase-TiO2 (a-TiO2) photocatalyst under visible-light irradiation by adding nitrogen-doped TiO2 (N-TiO2) for depression of recombination rate between photoexcited electron and hole. The composites (a-TiO2/N-TiO2) were prepared by grinding in ethanol solvent at 200 rpm for 15 min with change in weight ratio of N-TiO 2. In addition to the characterizations by X-ray diffraction and X-ray photoelectron spectroscopy, measurements of existing singlet oxygen by chemiluminescens method and photocatalytic activity by using NOx decomposition were conducted. The increases in singlet oxygen and photocatalytic activity have been observed and the phenomena are discussed based on the efficient prevention of recombination between photoexcited electron and hole within the prepared composite.",

author = "Kang, {In Cheol} and Qiwu Zhang and Shu Yin and Tsugio Sato and Fumio Saito",

year = "2008",

month = may,

day = "15",

doi = "10.1021/es702932m",

language = "English",

volume = "42",

pages = "3622--3626",

journal = "Environmental Science & Technology",

issn = "0013-936X",

publisher = "American Chemical Society",

number = "10",

}

TY - JOUR

T1 - Improvement in photocatalytic activity of TiO2 under visible irradiation through addition of N-TiO2

AU - Kang, In Cheol

AU - Zhang, Qiwu

AU - Yin, Shu

AU - Sato, Tsugio

AU - Saito, Fumio

PY - 2008/5/15

Y1 - 2008/5/15

N2 - This work is focused on improvement in photocatalytic activity of anatase-TiO2 (a-TiO2) photocatalyst under visible-light irradiation by adding nitrogen-doped TiO2 (N-TiO2) for depression of recombination rate between photoexcited electron and hole. The composites (a-TiO2/N-TiO2) were prepared by grinding in ethanol solvent at 200 rpm for 15 min with change in weight ratio of N-TiO 2. In addition to the characterizations by X-ray diffraction and X-ray photoelectron spectroscopy, measurements of existing singlet oxygen by chemiluminescens method and photocatalytic activity by using NOx decomposition were conducted. The increases in singlet oxygen and photocatalytic activity have been observed and the phenomena are discussed based on the efficient prevention of recombination between photoexcited electron and hole within the prepared composite.

AB - This work is focused on improvement in photocatalytic activity of anatase-TiO2 (a-TiO2) photocatalyst under visible-light irradiation by adding nitrogen-doped TiO2 (N-TiO2) for depression of recombination rate between photoexcited electron and hole. The composites (a-TiO2/N-TiO2) were prepared by grinding in ethanol solvent at 200 rpm for 15 min with change in weight ratio of N-TiO 2. In addition to the characterizations by X-ray diffraction and X-ray photoelectron spectroscopy, measurements of existing singlet oxygen by chemiluminescens method and photocatalytic activity by using NOx decomposition were conducted. The increases in singlet oxygen and photocatalytic activity have been observed and the phenomena are discussed based on the efficient prevention of recombination between photoexcited electron and hole within the prepared composite.

UR - http://www.scopus.com/inward/record.url?scp=43749088111&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=43749088111&partnerID=8YFLogxK

U2 - 10.1021/es702932m

DO - 10.1021/es702932m

M3 - Article

C2 - 18546699

AN - SCOPUS:43749088111

SN - 0013-936X

VL - 42

SP - 3622

EP - 3626

JO - Environmental Science & Technology

JF - Environmental Science & Technology

IS - 10

ER -

Improvement in photocatalytic activity of TiO₂ under visible irradiation through addition of N-TiO₂

Abstract

Access to Document

Other files and links

Fingerprint

Cite this