본 연구에서는 에멀젼 자기조립틀을 활용하여 거대기공을 갖는 타이타니아 분말을 합성하였으며, 자외선 조사를 활용한 광촉매 실험을 통해 상용화된 타이타니아 나노입자와 다공질 타이타니아 분말을 이용한 고초균의 살균 효과를 비교하였다. 다공질 분말의 기공 크기를 달리하여 자외선 조사 시간에 따른 고초균 수의 감소를 측정하였으며, 살균 실험의 최적 조건을 도출하기 위하여 기공 크기에 따른 다공질 타이타니아 분말의 살균력을 비교하였다. 기공 크기가 작아질수록 살균 효과는 증대됨을 관찰하였으며, 광촉매의 활용 및 자외선 조사에 의해 1시간 동안 50% 이상의 고초균이 제거되는 효과를 확인하였다. 또한 활성 화학종의 발생을 촉진하기 위하여 과산화수소의 희석 용액을 광촉매 살균 방식과 결합하였으며, 1시간 동안의 자외선 조사에 의해 균주의 거의 대부분이 사멸되는 등 고초균에 대한 살균 효과를 증진시킬 수 있었다.

In this study, macroporous titania powders were synthesized utilizing the emulsion-assisted self-assembly to apply the removal of B. subtilis under UV irradiation, and the results were compared with the bactericidal effect of commercial titania nanoparticles. By changing the pore size of the porous titania powder, the reduction of B. subtilis by photocatalytic effect was measured, and the bactericidal capacity of the porous particles according to the pore size was compared in order to derive the optimum condition of the sterilization experiment. It was observed that the sterilization effect increased as the pore size became smaller, and it was confirmed that more than 50% of B. subtilis cold be removed for 1 hour of UV irradiation. Also, in order to promote the generation of active chemical species, a diluted solution of hydrogen peroxide was combined with the photocatalytic sterilization method, resulting in the removal of most of the strain after ultraviolet irradiation for 1 hour.

Macroporous titania Photocatalyst B. subtilis Antibacterial activity

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