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Yong GUO


Ying GUO


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Journal of Zhejiang University SCIENCE A 2024 Vol.25 No.4 P.340-356


N-doping offering higher photodegradation performance of dissolved black carbon for organic pollutants: experimental and theoretical studies

Author(s):  Yong GUO, Mengxia CHEN, Ting CHEN, Ying GUO, Zixuan XU, Guowei XU, Soukthakhane SINSONESACK, Keophoungeun KANMANY

Affiliation(s):  Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210093, China; more

Corresponding email(s):   guoyong@hhu.edu.cn, guoyinghhu@163.com

Key Words:  Dissolved black carbon (DBC), N-doping, Organic pollutants, Band gap, Photodegradation

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Yong GUO, Mengxia CHEN, Ting CHEN, Ying GUO, Zixuan XU, Guowei XU, Soukthakhane SINSONESACK, Keophoungeun KANMANY. N-doping offering higher photodegradation performance of dissolved black carbon for organic pollutants: experimental and theoretical studies[J]. Journal of Zhejiang University Science A, 2024, 25(4): 340-356.

@article{title="N-doping offering higher photodegradation performance of dissolved black carbon for organic pollutants: experimental and theoretical studies",
author="Yong GUO, Mengxia CHEN, Ting CHEN, Ying GUO, Zixuan XU, Guowei XU, Soukthakhane SINSONESACK, Keophoungeun KANMANY",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T N-doping offering higher photodegradation performance of dissolved black carbon for organic pollutants: experimental and theoretical studies
%A Yong GUO
%A Mengxia CHEN
%A Ting CHEN
%A Ying GUO
%A Zixuan XU
%A Guowei XU
%A Soukthakhane SINSONESACK
%A Keophoungeun KANMANY
%J Journal of Zhejiang University SCIENCE A
%V 25
%N 4
%P 340-356
%@ 1673-565X
%D 2024
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2300081

T1 - N-doping offering higher photodegradation performance of dissolved black carbon for organic pollutants: experimental and theoretical studies
A1 - Yong GUO
A1 - Mengxia CHEN
A1 - Ting CHEN
A1 - Ying GUO
A1 - Zixuan XU
A1 - Guowei XU
A1 - Soukthakhane SINSONESACK
A1 - Keophoungeun KANMANY
J0 - Journal of Zhejiang University Science A
VL - 25
IS - 4
SP - 340
EP - 356
%@ 1673-565X
Y1 - 2024
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2300081

We investigated the influence mechanism of n-doping for dissolved black carbon (DBC) photodegradation of organic pollutants. The degradation performance of N-doped dissolved black carbon (NDBC) for tetracycline (TC) (71%) is better than that for methylene blue (MB) (28%) under irradiation. These levels are both better than DBC degradation performances for TC (68%) and MB (18%) under irradiation. Reactive species quenching experiments suggest that h+ and O2- are the main reactive species for NDBC photodegraded TC, while ·OH and h+ are the main reactive species for NDBC photodegraded MB. ·OH is not observed during DBC photodegradation of MB. This is likely because n-doping increases valence-band (VB) energy from 1.55 eV in DBC to 2.04 eV in NDBC; the latter is strong enough to oxidize water to form ·OH. Additionally, n-doping increases the DBC band gap of 2.29 to 2.62 eV in NDBC, resulting in a higher separation efficiency of photo-generated electrons-holes in NDBC than in DBC. All these factors give NDBC stronger photodegradation performance for TC and MB than DBC. High-performance liquid chromatography-mass spectrometry (HPLC-MS) characterization and toxicity evaluation with the quantitative structure-activity relationship (QSAR) method suggest that TC photodegradation intermediates produced by NDBC have less aromatic structure and are less toxic than those produced by DBC. We adopted a theoretical approach to clarify the relationship between the surface groups of NDBC and the photoactive species produced. Our results add to the understanding of the photochemical behavior of NDBC.


作者:郭勇1,3,陈孟霞1,陈婷2,郭颖2,徐子璇1,徐国威1,Soukthakhane SINSONESACK4, Keophoungeun KANMANY4
结论:氮掺杂促进了生物炭衍生的DBC对四环素(TC)和亚甲基蓝(MB)的光降解性能。这可能是由于以下原因:(1)氮掺杂使DBC的价带能量从1.55 eV增加到氮掺杂的可溶性黑炭(NDBC)的2.04 eV,这足以使NDBC的水氧化形成·OH。换句话说,NDBC可以产生-OH和,而DBC只能产生。(2)氮掺杂使DBC的带隙从2.29 eV增加到2.62 eV,从而导致光生电子孔的分离效率提高,最终促进光降解效率。(3)氮掺杂降低DBC在光照下的稳定性,使DBC对可见光的反应更加灵敏。


Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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