Water decomposition on TiO2-SiO2 and RuS 2/TiO2-SiO2 photocatalysts: The effect of electronic characteristics

The Vinh Nguyen; Sung Sik Kim; O. Bong Yang

doi:10.1016/j.catcom.2003.11.007

Water decomposition on TiO₂-SiO₂ and RuS ₂/TiO₂-SiO₂ photocatalysts: The effect of electronic characteristics

The Vinh Nguyen
, Sung Sik Kim
, O. Bong Yang^*

^*Corresponding author for this work

Division of Chemical Engineering

Jeonbuk National University

Research output: Contribution to journal › Journal article › peer-review

43 Scopus citations

Abstract

Synergistic effects in terms of photocatalytic activity and electronic properties such as band gap energy, flat-band potential and doping density were observed on atomically mixing TiO₂ and SiO₂ by sol-gel method. Hydrogen evolution was remarkably enhanced over the optimal RuS ₂ loading (1 wt%) on TiO₂-SiO₂, which could be successfully explained by the charge transfer mechanism. Hydrogen seems to produce on the RuS₂ surface by the photo-excited electrons transferred from TiO₂-SiO₂ due to the significant difference of flat-band potentials. Meanwhile, oxygen might be evolved by the holes on TiO₂-SiO₂ or on the RuS₂ surface, retarding the recombination of photo-excited electrons and holes.

Original language	English
Pages (from-to)	59-62
Number of pages	4
Journal	Catalysis Communications
Volume	5 2
DOIs	https://doi.org/10.1016/j.catcom.2003.11.007
State	Published - 2004.02

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Charge transfer
Electronic characterization
Photocatalytic water decomposition
RuS
TiO-SiO

Quacquarelli Symonds(QS) Subject Topics

Engineering - Petroleum
Engineering - Chemical
Chemistry

Access to Document

10.1016/j.catcom.2003.11.007

Cite this

@article{9592326941bc4dd0a86fc98f9b8ffa97,

title = "Water decomposition on TiO2-SiO2 and RuS 2/TiO2-SiO2 photocatalysts: The effect of electronic characteristics",

abstract = "Synergistic effects in terms of photocatalytic activity and electronic properties such as band gap energy, flat-band potential and doping density were observed on atomically mixing TiO2 and SiO2 by sol-gel method. Hydrogen evolution was remarkably enhanced over the optimal RuS 2 loading (1 wt\%) on TiO2-SiO2, which could be successfully explained by the charge transfer mechanism. Hydrogen seems to produce on the RuS2 surface by the photo-excited electrons transferred from TiO2-SiO2 due to the significant difference of flat-band potentials. Meanwhile, oxygen might be evolved by the holes on TiO2-SiO2 or on the RuS2 surface, retarding the recombination of photo-excited electrons and holes.",

keywords = "Charge transfer, Electronic characterization, Photocatalytic water decomposition, RuS, TiO-SiO",

author = "Nguyen, \{The Vinh\} and Kim, \{Sung Sik\} and Yang, \{O. Bong\}",

year = "2004",

month = feb,

doi = "10.1016/j.catcom.2003.11.007",

language = "English",

volume = "5 2",

pages = "59--62",

journal = "Catalysis Communications",

issn = "1566-7367",

}

TY - JOUR

T1 - Water decomposition on TiO2-SiO2 and RuS 2/TiO2-SiO2 photocatalysts

T2 - The effect of electronic characteristics

AU - Nguyen, The Vinh

AU - Kim, Sung Sik

AU - Yang, O. Bong

PY - 2004/2

Y1 - 2004/2

N2 - Synergistic effects in terms of photocatalytic activity and electronic properties such as band gap energy, flat-band potential and doping density were observed on atomically mixing TiO2 and SiO2 by sol-gel method. Hydrogen evolution was remarkably enhanced over the optimal RuS 2 loading (1 wt%) on TiO2-SiO2, which could be successfully explained by the charge transfer mechanism. Hydrogen seems to produce on the RuS2 surface by the photo-excited electrons transferred from TiO2-SiO2 due to the significant difference of flat-band potentials. Meanwhile, oxygen might be evolved by the holes on TiO2-SiO2 or on the RuS2 surface, retarding the recombination of photo-excited electrons and holes.

AB - Synergistic effects in terms of photocatalytic activity and electronic properties such as band gap energy, flat-band potential and doping density were observed on atomically mixing TiO2 and SiO2 by sol-gel method. Hydrogen evolution was remarkably enhanced over the optimal RuS 2 loading (1 wt%) on TiO2-SiO2, which could be successfully explained by the charge transfer mechanism. Hydrogen seems to produce on the RuS2 surface by the photo-excited electrons transferred from TiO2-SiO2 due to the significant difference of flat-band potentials. Meanwhile, oxygen might be evolved by the holes on TiO2-SiO2 or on the RuS2 surface, retarding the recombination of photo-excited electrons and holes.

KW - Charge transfer

KW - Electronic characterization

KW - Photocatalytic water decomposition

KW - RuS

KW - TiO-SiO

UR - https://www.scopus.com/pages/publications/0348046437

U2 - 10.1016/j.catcom.2003.11.007

DO - 10.1016/j.catcom.2003.11.007

M3 - Journal article

AN - SCOPUS:0348046437

SN - 1566-7367

VL - 5 2

SP - 59

EP - 62

JO - Catalysis Communications

JF - Catalysis Communications

ER -