Degradation of Antibiotics Using Silver Decorated Heterojunction Carbon Nitride under Visible Light

Taeyoon Lee

doi:10.14481/jkges.2023.24.3.23

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2023 Vol.24, Issue 3 Preview Page

Degradation of Antibiotics Using Silver Decorated Heterojunction Carbon Nitride under Visible Light 은 장식 이종접합 질화탄소를 이용한 가시광선 조건에서의 항생제 분해 연구

1 March 2023. pp. 23-27

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Abstract

Graphitic carbon nitride (g-C₃N₄) has been used as effective photocatalyst for degradation of antibiotics under visible light irradiation. However, the fast recombination of hole-electron pair may limit their photocatalytic efficiency. In our study, Ag was grafted on g-C₃N₄/g-C₃N₄ isotype heterojunction by a microwave-assisted decomposition method. The structure and physical properties of heterojunction photocatalyst were characterized through X-ray diffraction, UV-DRS, FT-IR, and Photoluminescence analyses. Ag decorated g-C₃N₄/g-C₃N₄ isotype heterojunction exhibited excellent photocatalytic activity for degradation of sulfamethoxazole under irradiation under visible light irradiation within 210 min, which is higher than g-C₃N₄/g-C₃N₄ isotype heterojunction and bulk g-C₃N₄. The addition of Ag may broaden the visible light absorption and restrict the recombination of hole-electron pair because of the surface plasmons resonance, resulting in the improving the photocatalytic activity.

Keywords

Graphitic carbon nitride

Photocatalyst

Antibiotics

Visible light

Heterojunction

흑연질화탄소(g-C₃N₄)는 가시광선 조사 하에서 항생제 분해에 효과적인 광촉매로 사용되어 왔다. 그러나 정공-전자 쌍의 빠른 재결합은 광분해 효율을 제한하였다. 본 연구에서는 Ag를 마이크로파 보조 분해 방법에 의해 g-C₃N₄/g-C₃N₄ iso-type 이종 접합 광촉매에 결합시켰다. X선 회절분석, UV-DRS, FT-IR, PL 분석을 통해 이종접합의 구조와 물성을 규명하였고, Ag 장식 g-C₃N₄/g-C₃N₄ 이종접합 광촉매는 g-C₃N₄/g-C₃N₄ iso-type 이종접합 및 벌크 g-C₃N₄ 보다 우수한 성능을 보여주었다. Ag 장식 이종접합 광촉매는 210분 이내에 가시광선 조사 하에서 설파메톡사졸 분해를 하여 우수한 광촉매 활성을 나타냈다. g-C₃N₄에 Ag의 첨가는 가시광선 흡수 범위를 넓히고 표면 플라즈몬 공명으로 인해 정공-전자쌍의 재결합을 제한하여 광촉매 활성을 향상시키는 것을 알 수 있었다.

키워드

질화탄소

광촉매

항생제

가시광선

이종결합

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Information

Publisher :Korean Geo-Environmental Society
Publisher(Ko) :한국지반환경공학회
Journal Title :Journal of the Korean Geo-Environmental Society
Journal Title(Ko) :한국지반환경공학회 논문집
Volume : 24
No :3
Pages :23-27
Received Date : 2023-02-05
Revised Date : 2023-02-06
Accepted Date : 2023-02-22
DOI :https://doi.org/10.14481/jkges.2023.24.3.23

Journal of the Korean Geo-Environmental Society ISSN:1598-0820(Print) 2714-1233(Online) 한국지반환경공학회 논문집

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