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물 속에 존재하는 유해 질소화합물 처리

물 속에 존재하는 유해 질소화합물 처리. 서울대학교 응용화학부 촉매 및 표면화학 연구실 이호인. 대상 물질. 시안이온 (cyanide, CN - ) IMP (6-hydroxy-2-isopropyl-4-methyl pyrimidine). 촉 매. Degussa P25 Transition metal modified TiO 2 (e.g. Ni) POM modified TiO 2 (POM: polyoxometalates) (e.g. PW 12 O 40 3- ) Synthesized TiO 2

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물 속에 존재하는 유해 질소화합물 처리

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  1. 물 속에 존재하는 유해질소화합물 처리 서울대학교 응용화학부 촉매 및 표면화학 연구실 이호인

  2. 대상 물질 • 시안이온 (cyanide, CN-) • IMP (6-hydroxy-2-isopropyl-4-methyl pyrimidine)

  3. 촉 매 • Degussa P25 • Transition metal modified TiO2 (e.g. Ni) • POM modified TiO2 (POM: polyoxometalates) (e.g. PW12O403-) • Synthesized TiO2 • Anatase TiO2 vs. rutile TiO2

  4. 연구 내용 • 반응 메커니즘 분석 • Oxidation pathways • Direct oxidation (e.g. electron transfer) • Indirect oxidation (e.g. •OH, •HO2) • Role of electron scavengers • Band positions

  5. Catalyst: P25 Conc. of cyanide (mM) Irradiation time (min) CN-CNO- NO3- NO2-

  6. Catalyst: Ni/TiO2 Conversion of cyanide (%) Reduction temperature  Amount of Ni: 6 wt%

  7. Catalyst: Ni/TiO2 Conversion of cyanide (%) Amount of Ni (wt%)  Reduction temperature: 500 ℃

  8.  Effect of OH radical scavengers SG-1 & SG-2: H3PW12O40/TiO2 SG-3 & SG-4: pure TiO2 (with different method)  All values in the table are in 10-5 M min-1

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