한국지반환경공학회 논문집 (Journal of the Korean GEO-environmental Society)

  • 제24권3호
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  • Pages.23-27
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  • 2023
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  • 1598-0820(pISSN)
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  • 2714-1233(eISSN)
한국지반환경공학회 (Korean Geo-Environmental Society)
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은 장식 이종접합 질화탄소를 이용한 가시광선 조건에서의 항생제 분해 연구

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

  • Taeyoon, Lee (Department of Environmental Engineering, Pukyong National University)
  • 투고 : 2023.02.05
  • 심사 : 2023.02.22
  • 발행 : 2023.03.01
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초록

흑연질화탄소(g-C3N4)는 가시광선 조사 하에서 항생제 분해에 효과적인 광촉매로 사용되어 왔다. 그러나 정공-전자쌍의 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 이종 접합 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.

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.

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과제정보

본 연구는 부경대학교 자율창의연구지원사업(과제번호: 202206610001)으로 수행되었습니다.

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