A direct oxygen vacancy essential Z-scheme C@Ti4O7/g-C3N4 heterojunctions for visible-light degradation towards environmental dye pollutants

Xin Zhao; Xiaojing Zhang; Bolin Zhao; Fei Jia; Dongxue Han; Yingying Fan; Li Niu; Ari Ivaska

doi:10.1016/j.apsusc.2020.146486

A direct oxygen vacancy essential Z-scheme C@Ti4O7/g-C3N4 heterojunctions for visible-light degradation towards environmental dye pollutants

Xin Zhao, Xiaojing Zhang, Bolin Zhao, Fei Jia, Dongxue Han, Yingying Fan, Li Niu, Ari Ivaska

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Abstract

The unique C@Ti4O7/g-C3N4 photocatalyst was synthesize via wet chemical and annealing & calcining method, which was gifted both the intrinsic oxygen vacancies as well as Z-scheme heterojunction nature in structure. Such a unique three-dimensional structure exhibited exceptional photodegradation performance for the dye simulations system (Rhodamine B (RhB), methylene blue (MB) and methyl orange (MO)) under visible light irradiation, which is better than a single component and Anatase-TiO2. Subsequently, a possible photocatalytic Z-scheme mechanism was proposed to further illustrate the effective separation of photogenerated electron-hole pairs in C@Ti4O7/g-C3N4 based on structure and electrochemical characterizations results, which will help to better understand the nature of Z-scheme heterojunctions.

Original language	English
Pages (from-to)	146486
Journal	Applied Surface Science
Volume	525
DOIs	https://doi.org/10.1016/j.apsusc.2020.146486
Publication status	Published - 2020
MoE publication type	A1 Journal article-refereed

Keywords

C@TiO/g-CN
Specific surface area
Adsorption capacity
Photogenerated carriers
Photodegradation

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10.1016/j.apsusc.2020.146486

Applied Surface Science-Manuscript (1)Accepted author manuscript, 3.93 MBLicence: CC BY-NC-ND

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title = "A direct oxygen vacancy essential Z-scheme C@Ti4O7/g-C3N4 heterojunctions for visible-light degradation towards environmental dye pollutants",

abstract = "The unique C@Ti4O7/g-C3N4 photocatalyst was synthesize via wet chemical and annealing & calcining method, which was gifted both the intrinsic oxygen vacancies as well as Z-scheme heterojunction nature in structure. Such a unique three-dimensional structure exhibited exceptional photodegradation performance for the dye simulations system (Rhodamine B (RhB), methylene blue (MB) and methyl orange (MO)) under visible light irradiation, which is better than a single component and Anatase-TiO2. Subsequently, a possible photocatalytic Z-scheme mechanism was proposed to further illustrate the effective separation of photogenerated electron-hole pairs in C@Ti4O7/g-C3N4 based on structure and electrochemical characterizations results, which will help to better understand the nature of Z-scheme heterojunctions.",

keywords = "C@TiO/g-CN, Specific surface area, Adsorption capacity, Photogenerated carriers, Photodegradation",

author = "Xin Zhao and Xiaojing Zhang and Bolin Zhao and Fei Jia and Dongxue Han and Yingying Fan and Li Niu and Ari Ivaska",

year = "2020",

doi = "10.1016/j.apsusc.2020.146486",

language = "English",

volume = "525",

pages = "146486",

journal = "Applied Surface Science",

issn = "0169-4332",

publisher = "Elsevier",

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TY - JOUR

T1 - A direct oxygen vacancy essential Z-scheme C@Ti4O7/g-C3N4 heterojunctions for visible-light degradation towards environmental dye pollutants

AU - Zhao, Xin

AU - Zhang, Xiaojing

AU - Zhao, Bolin

AU - Jia, Fei

AU - Han, Dongxue

AU - Fan, Yingying

AU - Niu, Li

AU - Ivaska, Ari

PY - 2020

Y1 - 2020

N2 - The unique C@Ti4O7/g-C3N4 photocatalyst was synthesize via wet chemical and annealing & calcining method, which was gifted both the intrinsic oxygen vacancies as well as Z-scheme heterojunction nature in structure. Such a unique three-dimensional structure exhibited exceptional photodegradation performance for the dye simulations system (Rhodamine B (RhB), methylene blue (MB) and methyl orange (MO)) under visible light irradiation, which is better than a single component and Anatase-TiO2. Subsequently, a possible photocatalytic Z-scheme mechanism was proposed to further illustrate the effective separation of photogenerated electron-hole pairs in C@Ti4O7/g-C3N4 based on structure and electrochemical characterizations results, which will help to better understand the nature of Z-scheme heterojunctions.

AB - The unique C@Ti4O7/g-C3N4 photocatalyst was synthesize via wet chemical and annealing & calcining method, which was gifted both the intrinsic oxygen vacancies as well as Z-scheme heterojunction nature in structure. Such a unique three-dimensional structure exhibited exceptional photodegradation performance for the dye simulations system (Rhodamine B (RhB), methylene blue (MB) and methyl orange (MO)) under visible light irradiation, which is better than a single component and Anatase-TiO2. Subsequently, a possible photocatalytic Z-scheme mechanism was proposed to further illustrate the effective separation of photogenerated electron-hole pairs in C@Ti4O7/g-C3N4 based on structure and electrochemical characterizations results, which will help to better understand the nature of Z-scheme heterojunctions.

KW - C@TiO/g-CN

KW - Specific surface area

KW - Adsorption capacity

KW - Photogenerated carriers

KW - Photodegradation

U2 - 10.1016/j.apsusc.2020.146486

DO - 10.1016/j.apsusc.2020.146486

M3 - Article

SN - 0169-4332

VL - 525

SP - 146486

JO - Applied Surface Science

JF - Applied Surface Science

ER -

A direct oxygen vacancy essential Z-scheme C@Ti4O7/g-C3N4 heterojunctions for visible-light degradation towards environmental dye pollutants

Abstract

Keywords

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