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Green in-situ construction of OV-rich HAp/Mo2C Schottky junctions: Boosting antibiotic photodegradation performance and mechanistic insights.

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Title: Green in-situ construction of OV-rich HAp/Mo2C Schottky junctions: Boosting antibiotic photodegradation performance and mechanistic insights.
Authors: Tang, Jiaming1 (AUTHOR), Li, Xiaoyu1 (AUTHOR), Lv, Caizhi2,3 (AUTHOR), Hou, Xiandeng1,4,5 (AUTHOR), Xin, Hui1,4 (AUTHOR) xinhui@scu.edu.cn, Wu, Lan1,4 (AUTHOR) wulan@scu.edu.cn
Source: Separation & Purification Technology. Aug2026:Part 3, Vol. 397, pN.PAG-N.PAG. 1p.
Subjects: Photodegradation, Schottky barrier, Photocatalysis, Oxygen vacancy, Nanocomposite materials, Hydroxyapatite, Molybdenum compounds
Abstract: Developing materials with Schottky junctions has emerged as a powerful strategy for elevating the catalytic performance of photocatalytic systems. However, the semiconductor materials currently used in Schottky junctions often have disadvantages such as biotoxicity, poor chemical stability, and complex preparation, which limit their practical applications. Herein, utilizing hydroxyapatite (HAp), an nontoxic insulator with excellent chemical stability and facile synthesizability, and molybdenum carbide (Mo 2 C) featuring noble-metal-like properties, we fabricated oxygen vacancy-enriched Schottky junction nanocomposites (O V -HAp/Mo 2 C) with intimate interfacial contact via a facile strategy combining coprecipitation and in-situ calcination. The as-prepared materials were applied to the photocatalytic degradation of antibiotics. Photoelectrochemical characterization and DFT calculation results prove that the Schottky junction in the composite material enables unidirectional electron transfer from O V -HAp to Mo 2 C, promoting high-efficiency separation of photogenerated charge carriers. Under full-spectrum irradiation, the active radicals h+, ·O 2 −, and ·OH generated by O V -HAp/Mo 2 C attack norfloxacin (NOR), with a degradation efficiency of 92.3% within 15 min. The degradation rate constant was 0.0950 min−1, which was 6.4 times that of O V -HAp (0.0148 min−1). Besides, it exhibited good reusability with a modest decline after 5 cycles of tests. In addition, O V -HAp/Mo 2 C also exhibits good degradation performance for sulfamethoxazole, tetracycline, and kanamycin. Thus, this work provides novel insights into fabricating non-toxic, stable, and easily synthesizable Schottky junction materials. [ABSTRACT FROM AUTHOR]
Copyright of Separation & Purification Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 193531014
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  Label: Title
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  Data: Green in-situ construction of OV-rich HAp/Mo2C Schottky junctions: Boosting antibiotic photodegradation performance and mechanistic insights.
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  Data: <searchLink fieldCode="AR" term="%22Tang%2C+Jiaming%22">Tang, Jiaming</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Xiaoyu%22">Li, Xiaoyu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lv%2C+Caizhi%22">Lv, Caizhi</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hou%2C+Xiandeng%22">Hou, Xiandeng</searchLink><relatesTo>1,4,5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xin%2C+Hui%22">Xin, Hui</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<i> xinhui@scu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Wu%2C+Lan%22">Wu, Lan</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<i> wulan@scu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Separation+%26+Purification+Technology%22">Separation & Purification Technology</searchLink>. Aug2026:Part 3, Vol. 397, pN.PAG-N.PAG. 1p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Photodegradation%22">Photodegradation</searchLink><br /><searchLink fieldCode="DE" term="%22Schottky+barrier%22">Schottky barrier</searchLink><br /><searchLink fieldCode="DE" term="%22Photocatalysis%22">Photocatalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen+vacancy%22">Oxygen vacancy</searchLink><br /><searchLink fieldCode="DE" term="%22Nanocomposite+materials%22">Nanocomposite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Hydroxyapatite%22">Hydroxyapatite</searchLink><br /><searchLink fieldCode="DE" term="%22Molybdenum+compounds%22">Molybdenum compounds</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Developing materials with Schottky junctions has emerged as a powerful strategy for elevating the catalytic performance of photocatalytic systems. However, the semiconductor materials currently used in Schottky junctions often have disadvantages such as biotoxicity, poor chemical stability, and complex preparation, which limit their practical applications. Herein, utilizing hydroxyapatite (HAp), an nontoxic insulator with excellent chemical stability and facile synthesizability, and molybdenum carbide (Mo 2 C) featuring noble-metal-like properties, we fabricated oxygen vacancy-enriched Schottky junction nanocomposites (O V -HAp/Mo 2 C) with intimate interfacial contact via a facile strategy combining coprecipitation and in-situ calcination. The as-prepared materials were applied to the photocatalytic degradation of antibiotics. Photoelectrochemical characterization and DFT calculation results prove that the Schottky junction in the composite material enables unidirectional electron transfer from O V -HAp to Mo 2 C, promoting high-efficiency separation of photogenerated charge carriers. Under full-spectrum irradiation, the active radicals h+, ·O 2 −, and ·OH generated by O V -HAp/Mo 2 C attack norfloxacin (NOR), with a degradation efficiency of 92.3% within 15 min. The degradation rate constant was 0.0950 min−1, which was 6.4 times that of O V -HAp (0.0148 min−1). Besides, it exhibited good reusability with a modest decline after 5 cycles of tests. In addition, O V -HAp/Mo 2 C also exhibits good degradation performance for sulfamethoxazole, tetracycline, and kanamycin. Thus, this work provides novel insights into fabricating non-toxic, stable, and easily synthesizable Schottky junction materials. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Separation & Purification Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.seppur.2026.138105
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      – Code: eng
        Text: English
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        StartPage: N.PAG
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      – SubjectFull: Photodegradation
        Type: general
      – SubjectFull: Schottky barrier
        Type: general
      – SubjectFull: Photocatalysis
        Type: general
      – SubjectFull: Oxygen vacancy
        Type: general
      – SubjectFull: Nanocomposite materials
        Type: general
      – SubjectFull: Hydroxyapatite
        Type: general
      – SubjectFull: Molybdenum compounds
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    Titles:
      – TitleFull: Green in-situ construction of OV-rich HAp/Mo2C Schottky junctions: Boosting antibiotic photodegradation performance and mechanistic insights.
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            – D: 17
              M: 08
              Text: Aug2026:Part 3
              Type: published
              Y: 2026
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