Journal of Adhesion and Interface (접착 및 계면)

The Society of Adhesion and Interface, Korea (한국접착및계면학회)
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Phosphine-Functionalized Mesoporous Silica for the Adsorption of Heavy Metal Ions in Water

수중 중금속이온 흡착을 위한 포스핀 기능화된 메조다공성 실리카

  • Sung Soo Park (Department of Polymer Nano Engineering, Dong-Eui University) ;
  • Mi-Ra Kim (Department of Polymer Nano Engineering, Dong-Eui University) ;
  • Weontae Oh (Department of Polymer Nano Engineering, Dong-Eui University) ;
  • Minjae Kim (Busanil Science High School) ;
  • Taegeon Son (Busanil Science High School) ;
  • Hamin Lee (Busanil Science High School) ;
  • Sunghwan Jang (Busanil Science High School) ;
  • Dojun Jung (Busanil Science High School)
  • 박성수 (동의대학교 고분자나노공학과) ;
  • 김미라 (동의대학교 고분자나노공학과) ;
  • 오원태 (동의대학교 고분자나노공학과) ;
  • 김민재 (부산일과학고등학교) ;
  • 손태건 (부산일과학고등학교) ;
  • 이하민 (부산일과학고등학교) ;
  • 장성환 (부산일과학고등학교) ;
  • 정도준 (부산일과학고등학교)
  • Received : 2024.08.19
  • Accepted : 2024.10.15
  • Published : 2024.12.31
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Abstract

In this study, TEOS was used as a silica source, and a triblock copolymer (P123) was used as a template to produce mesoporous silica with a well-ordered hexagonal mesopore array (p6mm) through a self-assembly method and hydrothermal process under acidic condition. (Surfactant-extracted SBA-15). Surfactant-extracted SBA-15 showed the particle shape of a short rod with a size of approximately 990 nm. The surface area and pore diameter were 676 m2g-1 and 70.2 Å, respectively. Meanwhile, 2-(diphenylphosphino) ethyltriethoxysilane (DPPTES) with phosphine atom was grafted into the mesopores using a post-synthesis method. (DPPTES-SBA-15) Mesoporous silica (DPPTES-SBA-15) modified with DPPTES had a well-ordered pore structure (p6mm) and well-maintained particle shape of short rods. The surface area and pore diameter of DPPTES-SBA-15 decreased to 598 m2g-1 and 64.5 Å, respectively. The adsorption study on heavy metal ions was performed using DPPTES-SBA-15 as an adsorbent, and the results showed excellent adsorption capacities of 3.6 (749.6 mg Pb2+ g-1), 3.9 (249.2 mg Cu2+g-1), and 3.9 mmolg-1 (773.6 mg Hg2+g-1) for Pb2+, Cu2+, and Hg2+ heavy metal ions, respectively

본 연구에서는 실리카원으로 Tetraethyl orthosilicate (TEOS)를 사용하고 주형으로 트리블럭 공중합체 (P123)를 사용하여 산성 조건에서 자기조립 방법과 수열합성 과정을 거쳐서 잘 배열된 육방체 구조(p6mm)의 메조세공 배열구조를 가지는 다공성 실리카 물질 (Surfactant-extracted SBA-15)을 합성하였다. Surfactant-extracted SBA-15는 약 990 nm의 크기를 가지는 짧은 로드의 입자 모양을 보여주었다. 그리고 표면적과 세공 직경은 각각 676 m2g-1와 70.2 Å이었다. 한편, 포스트-합성방법 (post-synthesis method)을 이용하여, 메조세공 표면에 포스핀 (P)이 포함된 유기 기능기 {2-(diphenylphosphino)ethyltriethoxysilane, DPPTES}를 그래프팅 (grafting) 하였다. (DPPTES-SBA-15) DPPTES-SBA-15는 잘 배열된 이차원 메조세공구조 (p6mm)를 가지고 짧은 로드의 입자모양을 잘 유지하였다. DPPTES-SBA-15의 표면적과 세공 직경은 각각 598 m2g-1와 64.5Å으로 감소하였다. DPPTES-SBA-15를 흡착제로 사용하여 중금속 이온 흡착 연구를 수행한 결과, Pb2+, Cu2+ 그리고 Hg2+ 중금속 이온에 대해 각각 3.6 (749.6 mg Pb2+ g-1), 3.9 (249.2 mg Cu2+ g-1), 3.9 mmolg-1 (773.6 mg Hg2+ g-1)의 우수한 흡착능을 보여주었다.

Keywords

Acknowledgement

본 연구는 과학기술정보통신부/한국연구재단의 지역대학 우수과학자 지원 사업(NRF-2021R1I1A3059777) 프로그램의 지원을 받아 수행되었습니다. 그리고 2023학년도 부산일과학고등학교 R&E 프로그램 일환으로 수행되었습니다. 이에 감사드립니다.

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