Adsorption and visible-light photocatalytic degradation of organic pollutants by functionalized biochar: Role of iodine doping and reactive species

Tianqi Wang; Pavani Dulanja Dissanayake; Mingzhe Sun; Zeyu Tao; Wei Han; Ning An; Qinfen Gu; Dehua Xia; Bingbing Tian; Yong Sik Ok; Jin Shang

doi:10.1016/j.envres.2021.111026

Adsorption and visible-light photocatalytic degradation of organic pollutants by functionalized biochar: Role of iodine doping and reactive species

Tianqi Wang, Pavani Dulanja Dissanayake, Mingzhe Sun, Zeyu Tao, Wei Han, Ning An, Qinfen Gu, Dehua Xia, Bingbing Tian, Yong Sik Ok, Jin Shang

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

48 Citations (Scopus)

Abstract

Here we developed the functionalized biochar as low-cost and heavy metal-free photocatalysts via a facile iodine doping method, which exhibit efficient adsorption and visible-light-driven photocatalytic degradation of representative organic pollutants, phenol and tetracycline. On one hand, iodine doping elevates the adsorption via creating extra pores, e.g., the adsorbed amounts of phenol by iodine-doped WSP and OSR biochar are increased by 161.8% and 146.3%, respectively, which in turn facilitates the photocatalytic oxidation of the adsorbed pollutants. On the other hand, iodine doping leads to the strong photo-induced excitation and remarkably reduced charge carrier transfer resistance, boosting the photocatalytic activity of iodine-doped biochar by more than 20 orders towards organic pollutants (e.g., phenol) degradation. The systematic analysis of reactive species reveals the active roles of [rad]O₂⁻, H₂O₂, ¹O₂, [rad]OH, electrons, and holes in photocatalytic process and identifies [rad]O₂⁻ to be the major contributor. This work affords a facile approach to generating porous and visible-light-driven photocatalyst from biomass for efficient adsorbing and degrading organic pollutants, opening up an avenue to turn biowaste into biomaterials for sustainable environmental remediation.

Original language	English
Article number	111026
Journal	Environmental Research
Volume	197
DOIs	https://doi.org/10.1016/j.envres.2021.111026
Publication status	Published - 2021 Jun

Bibliographical note

Funding Information:
This research was financially supported by the Science and Technology Innovation Commission of Shenzhen Municipality ( JCYJ20180307123906004 , JCYJ20190808181003717 ), the National Natural Science Foundation of China ( 21706224 , 21671075 ), the China Postdoctoral Science Foundation ( 2020M672810 ), the Research Grants Council of Hong Kong ( CityU 21301817 , 11215518 ), the Applied Research Grant from City University of Hong Kong (Ref: CityU 9667217 ), and the Strategic Research Grants from City University of Hong Kong (Ref: CityU 11306419 , 11308420 ). The authors would like to acknowledge the support of the UK Biochar Research Centre, School of Geosciences, University of Edinburgh . This research was also supported by the Hydrogen Energy Innovation Technology Development Program of the National Research Foundation of Korea (NRF) funded by the Korean government (Ministry of Science and ICT ( MSIT )) (No. NRF-2019M3E6A1064197 ) (Prof. Yong Sik Ok, Contribution: 100%).

Publisher Copyright:
© 2021

Keywords

Biochar
Iodine doping
Organic pollutants
Phenol
Tetracycline
Visible light photocatalytic degradation

ASJC Scopus subject areas

Biochemistry
General Environmental Science

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10.1016/j.envres.2021.111026

Cite this

@article{111e2d9bb93047cb9f05851508410f7b,

title = "Adsorption and visible-light photocatalytic degradation of organic pollutants by functionalized biochar: Role of iodine doping and reactive species",

abstract = "Here we developed the functionalized biochar as low-cost and heavy metal-free photocatalysts via a facile iodine doping method, which exhibit efficient adsorption and visible-light-driven photocatalytic degradation of representative organic pollutants, phenol and tetracycline. On one hand, iodine doping elevates the adsorption via creating extra pores, e.g., the adsorbed amounts of phenol by iodine-doped WSP and OSR biochar are increased by 161.8% and 146.3%, respectively, which in turn facilitates the photocatalytic oxidation of the adsorbed pollutants. On the other hand, iodine doping leads to the strong photo-induced excitation and remarkably reduced charge carrier transfer resistance, boosting the photocatalytic activity of iodine-doped biochar by more than 20 orders towards organic pollutants (e.g., phenol) degradation. The systematic analysis of reactive species reveals the active roles of [rad]O2−, H2O2, 1O2, [rad]OH, electrons, and holes in photocatalytic process and identifies [rad]O2− to be the major contributor. This work affords a facile approach to generating porous and visible-light-driven photocatalyst from biomass for efficient adsorbing and degrading organic pollutants, opening up an avenue to turn biowaste into biomaterials for sustainable environmental remediation.",

keywords = "Biochar, Iodine doping, Organic pollutants, Phenol, Tetracycline, Visible light photocatalytic degradation",

author = "Tianqi Wang and Dissanayake, {Pavani Dulanja} and Mingzhe Sun and Zeyu Tao and Wei Han and Ning An and Qinfen Gu and Dehua Xia and Bingbing Tian and Ok, {Yong Sik} and Jin Shang",

note = "Funding Information: This research was financially supported by the Science and Technology Innovation Commission of Shenzhen Municipality ( JCYJ20180307123906004 , JCYJ20190808181003717 ), the National Natural Science Foundation of China ( 21706224 , 21671075 ), the China Postdoctoral Science Foundation ( 2020M672810 ), the Research Grants Council of Hong Kong ( CityU 21301817 , 11215518 ), the Applied Research Grant from City University of Hong Kong (Ref: CityU 9667217 ), and the Strategic Research Grants from City University of Hong Kong (Ref: CityU 11306419 , 11308420 ). The authors would like to acknowledge the support of the UK Biochar Research Centre, School of Geosciences, University of Edinburgh . This research was also supported by the Hydrogen Energy Innovation Technology Development Program of the National Research Foundation of Korea (NRF) funded by the Korean government (Ministry of Science and ICT ( MSIT )) (No. NRF-2019M3E6A1064197 ) (Prof. Yong Sik Ok, Contribution: 100%). Publisher Copyright: {\textcopyright} 2021",

year = "2021",

month = jun,

doi = "10.1016/j.envres.2021.111026",

language = "English",

volume = "197",

journal = "Environmental Research",

issn = "0013-9351",

publisher = "Academic Press Inc.",

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T1 - Adsorption and visible-light photocatalytic degradation of organic pollutants by functionalized biochar

T2 - Role of iodine doping and reactive species

AU - Wang, Tianqi

AU - Dissanayake, Pavani Dulanja

AU - Sun, Mingzhe

AU - Tao, Zeyu

AU - Han, Wei

AU - An, Ning

AU - Gu, Qinfen

AU - Xia, Dehua

AU - Tian, Bingbing

AU - Ok, Yong Sik

AU - Shang, Jin

N1 - Funding Information: This research was financially supported by the Science and Technology Innovation Commission of Shenzhen Municipality ( JCYJ20180307123906004 , JCYJ20190808181003717 ), the National Natural Science Foundation of China ( 21706224 , 21671075 ), the China Postdoctoral Science Foundation ( 2020M672810 ), the Research Grants Council of Hong Kong ( CityU 21301817 , 11215518 ), the Applied Research Grant from City University of Hong Kong (Ref: CityU 9667217 ), and the Strategic Research Grants from City University of Hong Kong (Ref: CityU 11306419 , 11308420 ). The authors would like to acknowledge the support of the UK Biochar Research Centre, School of Geosciences, University of Edinburgh . This research was also supported by the Hydrogen Energy Innovation Technology Development Program of the National Research Foundation of Korea (NRF) funded by the Korean government (Ministry of Science and ICT ( MSIT )) (No. NRF-2019M3E6A1064197 ) (Prof. Yong Sik Ok, Contribution: 100%). Publisher Copyright: © 2021

PY - 2021/6

Y1 - 2021/6

N2 - Here we developed the functionalized biochar as low-cost and heavy metal-free photocatalysts via a facile iodine doping method, which exhibit efficient adsorption and visible-light-driven photocatalytic degradation of representative organic pollutants, phenol and tetracycline. On one hand, iodine doping elevates the adsorption via creating extra pores, e.g., the adsorbed amounts of phenol by iodine-doped WSP and OSR biochar are increased by 161.8% and 146.3%, respectively, which in turn facilitates the photocatalytic oxidation of the adsorbed pollutants. On the other hand, iodine doping leads to the strong photo-induced excitation and remarkably reduced charge carrier transfer resistance, boosting the photocatalytic activity of iodine-doped biochar by more than 20 orders towards organic pollutants (e.g., phenol) degradation. The systematic analysis of reactive species reveals the active roles of [rad]O2−, H2O2, 1O2, [rad]OH, electrons, and holes in photocatalytic process and identifies [rad]O2− to be the major contributor. This work affords a facile approach to generating porous and visible-light-driven photocatalyst from biomass for efficient adsorbing and degrading organic pollutants, opening up an avenue to turn biowaste into biomaterials for sustainable environmental remediation.

AB - Here we developed the functionalized biochar as low-cost and heavy metal-free photocatalysts via a facile iodine doping method, which exhibit efficient adsorption and visible-light-driven photocatalytic degradation of representative organic pollutants, phenol and tetracycline. On one hand, iodine doping elevates the adsorption via creating extra pores, e.g., the adsorbed amounts of phenol by iodine-doped WSP and OSR biochar are increased by 161.8% and 146.3%, respectively, which in turn facilitates the photocatalytic oxidation of the adsorbed pollutants. On the other hand, iodine doping leads to the strong photo-induced excitation and remarkably reduced charge carrier transfer resistance, boosting the photocatalytic activity of iodine-doped biochar by more than 20 orders towards organic pollutants (e.g., phenol) degradation. The systematic analysis of reactive species reveals the active roles of [rad]O2−, H2O2, 1O2, [rad]OH, electrons, and holes in photocatalytic process and identifies [rad]O2− to be the major contributor. This work affords a facile approach to generating porous and visible-light-driven photocatalyst from biomass for efficient adsorbing and degrading organic pollutants, opening up an avenue to turn biowaste into biomaterials for sustainable environmental remediation.

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KW - Iodine doping

KW - Organic pollutants

KW - Phenol

KW - Tetracycline

KW - Visible light photocatalytic degradation

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DO - 10.1016/j.envres.2021.111026

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AN - SCOPUS:85103116968

SN - 0013-9351

VL - 197

JO - Environmental Research

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M1 - 111026

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Adsorption and visible-light photocatalytic degradation of organic pollutants by functionalized biochar: Role of iodine doping and reactive species

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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