Synthesis of Titanium Dioxides by Microemulsion Method and Their Photocatalytic Degradation of p-Nitrophenol

마이크로에멀젼법에 의한 이산화티탄의 합성 및 p-Nitrophenol의 광촉매 분해반응

  • Jung, Won Young (Division of Applied Chemical Engineering, Pukyong National University) ;
  • Han, Yeon Hee (Division of Applied Chemical Engineering, Pukyong National University) ;
  • Lee, Gun-Dae (Division of Applied Chemical Engineering, Pukyong National University) ;
  • Park, Seong Soo (Division of Applied Chemical Engineering, Pukyong National University) ;
  • Hong, Seong-Soo (Division of Applied Chemical Engineering, Pukyong National University)
  • 정원영 (부경대학교 응용화학공학부) ;
  • 한연희 (부경대학교 응용화학공학부) ;
  • 이근대 (부경대학교 응용화학공학부) ;
  • 박성수 (부경대학교 응용화학공학부) ;
  • 홍성수 (부경대학교 응용화학공학부)
  • Received : 2008.05.02
  • Accepted : 2008.05.19
  • Published : 2008.06.10

Abstract

Titania nanoparticles were prepared by controlled hydrolysis of titanium tetraisopropoxide (TTIP) in water-in-oil (W/O) and microemulsion stabilized with a nonionic surfactant, N P-10 (Polyoxyethylene Nonylphenol Ether: $C_9H_{19}C_6H_4(OCH_2CH_2)_{10}OH$)). The nanosized particles prepared in W/O microemulsion were characterized by FT-IR, TEM, XRD, TGA, and DTA. In addition, the photocatalytic degradation of p-nitrophenol has been studied by using a batch reactor in the presence of UV light in order to compare the photocatalytic activity of prepared nanosized titania. The nanaosized titania particles calcined at $300{\sim}600^{\circ}C$ showed an anatase structure, but it transformed to a rutile phase above $700^{\circ}C$ of calacination temperature. With an increase of $W_o$ ratio, the crystallite size increased but photocalytic activity decreased. The titania synthesized at $W_o=5$, R = 2, and calcined at $400{\sim}500^{\circ}C$ showed the highest activity on the photocatalytic degradation of p-nitrophenol.

Acknowledgement

Supported by : 산업자원부

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