Fabrication of La<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> Heterojunction with Enhanced Photocatalytic Performance of Tetracycline Hydrochloride

Fabrication of La<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> Heterojunction with Enhanced Photocatalytic Performance of Tetracycline Hydrochloride

In this study, La<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> heterojunction photocatalysts doped with different dosages of La<sub>2</sub>O<sub>3</sub> were constructed by a facile ultrasound-assisted calcination appro...

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Autores principales: Zhengru Zhu, Haiwen Xia, Rina Wu, Yongqiang Cao, Hong Li
Formato: article
Lenguaje:EN
Publicado: MDPI AG 2021
Materias:
La<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub>
heterojunction
photocatalytic performance
tetracycline hydrochloride
Crystallography
QD901-999
Acceso en línea:https://doaj.org/article/5b2ad3f4038f49019ef13885d9b9375b
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spelling oai:doaj.org-article:5b2ad3f4038f49019ef13885d9b9375b2021-11-25T17:18:38ZFabrication of La<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> Heterojunction with Enhanced Photocatalytic Performance of Tetracycline Hydrochloride10.3390/cryst111113492073-4352https://doaj.org/article/5b2ad3f4038f49019ef13885d9b9375b2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4352/11/11/1349https://doaj.org/toc/2073-4352In this study, La<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> heterojunction photocatalysts doped with different dosages of La<sub>2</sub>O<sub>3</sub> were constructed by a facile ultrasound-assisted calcination approach. The as-prepared photocatalysts were characterized by XRD, FTIR, FESEM, TEM, XPS, PL and DRS to verify the composite photocatalysts’ purity and to investigate their structural, morphological and elemental composition, and their energy band. According to the results, a type of pure rod–sheet-shaped, heterostructured nanoparticle was successfully obtained. Decorated with 10% La<sub>2</sub>O<sub>3</sub>, 2 g/L of the composite sample had a 93% degradation rate for 20 mg/L tetracycline hydrochloride within 2 h under visible light at a pH of 7. After four successive photocatalytic runs, satisfactory stability and reusability was exhibited, with 70% of the tetracycline hydrochloride being removed in the final experiment. Electrons (e<sup>−</sup>), photogenerated holes (h<sup>+</sup>), superoxide radical anions (·O<sub>2</sub><sup>−</sup>) and hydroxyl radicals (·OH) were the fundamental active species during the photocatalytic process and were investigated via quenching experiments. Furthermore, possible photocatalytic mechanisms were analyzed in this work.Zhengru ZhuHaiwen XiaRina WuYongqiang CaoHong LiMDPI AGarticleLa<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub>heterojunctionphotocatalytic performancetetracycline hydrochlorideCrystallographyQD901-999ENCrystals, Vol 11, Iss 1349, p 1349 (2021)
institution DOAJ
collection DOAJ
language EN
topic La<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub>
heterojunction
photocatalytic performance
tetracycline hydrochloride
Crystallography
QD901-999
spellingShingle La<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub>
heterojunction
photocatalytic performance
tetracycline hydrochloride
Crystallography
QD901-999
Zhengru Zhu
Haiwen Xia
Rina Wu
Yongqiang Cao
Hong Li
Fabrication of La<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> Heterojunction with Enhanced Photocatalytic Performance of Tetracycline Hydrochloride
description In this study, La<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> heterojunction photocatalysts doped with different dosages of La<sub>2</sub>O<sub>3</sub> were constructed by a facile ultrasound-assisted calcination approach. The as-prepared photocatalysts were characterized by XRD, FTIR, FESEM, TEM, XPS, PL and DRS to verify the composite photocatalysts’ purity and to investigate their structural, morphological and elemental composition, and their energy band. According to the results, a type of pure rod–sheet-shaped, heterostructured nanoparticle was successfully obtained. Decorated with 10% La<sub>2</sub>O<sub>3</sub>, 2 g/L of the composite sample had a 93% degradation rate for 20 mg/L tetracycline hydrochloride within 2 h under visible light at a pH of 7. After four successive photocatalytic runs, satisfactory stability and reusability was exhibited, with 70% of the tetracycline hydrochloride being removed in the final experiment. Electrons (e<sup>−</sup>), photogenerated holes (h<sup>+</sup>), superoxide radical anions (·O<sub>2</sub><sup>−</sup>) and hydroxyl radicals (·OH) were the fundamental active species during the photocatalytic process and were investigated via quenching experiments. Furthermore, possible photocatalytic mechanisms were analyzed in this work.
format article
author Zhengru Zhu
Haiwen Xia
Rina Wu
Yongqiang Cao
Hong Li
author_facet Zhengru Zhu
Haiwen Xia
Rina Wu
Yongqiang Cao
Hong Li
author_sort Zhengru Zhu
title Fabrication of La<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> Heterojunction with Enhanced Photocatalytic Performance of Tetracycline Hydrochloride
title_short Fabrication of La<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> Heterojunction with Enhanced Photocatalytic Performance of Tetracycline Hydrochloride
title_full Fabrication of La<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> Heterojunction with Enhanced Photocatalytic Performance of Tetracycline Hydrochloride
title_fullStr Fabrication of La<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> Heterojunction with Enhanced Photocatalytic Performance of Tetracycline Hydrochloride
title_full_unstemmed Fabrication of La<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> Heterojunction with Enhanced Photocatalytic Performance of Tetracycline Hydrochloride
title_sort fabrication of la<sub>2</sub>o<sub>3</sub>/g-c<sub>3</sub>n<sub>4</sub> heterojunction with enhanced photocatalytic performance of tetracycline hydrochloride
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/5b2ad3f4038f49019ef13885d9b9375b
work_keys_str_mv AT zhengruzhu fabricationoflasub2subosub3subgcsub3subnsub4subheterojunctionwithenhancedphotocatalyticperformanceoftetracyclinehydrochloride
AT haiwenxia fabricationoflasub2subosub3subgcsub3subnsub4subheterojunctionwithenhancedphotocatalyticperformanceoftetracyclinehydrochloride
AT rinawu fabricationoflasub2subosub3subgcsub3subnsub4subheterojunctionwithenhancedphotocatalyticperformanceoftetracyclinehydrochloride
AT yongqiangcao fabricationoflasub2subosub3subgcsub3subnsub4subheterojunctionwithenhancedphotocatalyticperformanceoftetracyclinehydrochloride
AT hongli fabricationoflasub2subosub3subgcsub3subnsub4subheterojunctionwithenhancedphotocatalyticperformanceoftetracyclinehydrochloride
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