• Proceedings of the Korea Air Pollution Research Association Conference
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• 2006.04a
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• pp.514-516
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• 2006

• Proceedings of the Korean Vacuum Society Conference
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• 2006.08a
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• pp.176-176
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• 2006

• Journal of Korean Society of Environmental Engineers
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• v.22 no.10
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• pp.1809-1816
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• 2000

The catalytic combustion of methanol as a model volatile organic compound(VOC) was been investigated over metal-phthalocyanine(PC) in a fixed bed flow reactor system. The catalytic activity of Co-PC pretreated with air and methanol mixture at $450^{\circ}C$ and 60 cc/min for 1 hr was very excellent. The order of catalytic activity on methanol combustion was summarized as follows: metal free-PC < Zn-PC < Fe-PC < Cu($\alpha$)-PC < Co-PC. By TG/DTA analysis, the tendency of thermal decomposition was increased as follows: metal free-PC < Zn-PC < Cu($\alpha$)-PC < Co-PC < Fe-PC. Under this pretreatment condition, the basic structures of Co-PC, Cu($\alpha$)-PC and Fe-PC were destroyed, and the new metal oxide such as $Co_3O_4$ from Co-PC was confirmed by EA and XRD analysis. But Zn-PC and metal free-PC were retained its basic structure under this pretreatment condition. On the combustion of methanol over Co-PC, HCHO and $HCOOCH_3$ were observed as an intermediate products in the high concentration of reactant or the short contact time(W/F).

• Journal of Sensor Science and Technology
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• v.7 no.4
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• pp.254-262
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• 1998

Multilayer Langmuir-Blodgett (LB) films coated on quartz crystal microbalance (QCM) of octa-substituted metallophhtalocyanines ($MPc(OEH)_8$, M = Cu, Co, and Sn) and dihydrogen phthalocyanines ($H_2Pc(OEH)_8$) were used to quantify $NO_2$ concentrations. They were exposed to various concentrations of $NO_2$ in dry $N_2$. Among the four phthalocyanines we tested, the metal-free $H_2Pc(OEH)_8$ was observed to be most sensitive to $NO_2$. However, its LB film showed a partially irreversible behavior, that is part of the frequency change due to $NO_2$ adsorption could not be recovered even after purging with pure $N_2$ gas for an extended period. Examining the spectra of NMR and FTIR revealed fact that the irreversible portion of frequency change was due to ether groups in the linkage between side chains and the Pc unit. In order to remove the effect of such initial deactivation, on $NO_2$ quantification experiment, a freshly fabricated LB film was treated at a high concentration of $NO_2$ so that the ether sites were saturated. A pretreated LB film showed a reproducible performance for repeated uses. The $CuPc(OEH)_8$ LB film showed a satisfactory sensing performance down to as low as 4 ppm. For the $H_2Pc(OEH)_8$ LB film, the lower detection limit was found to be 35ppb of $NO_2$. In order to make the experimental condition more realistic, the carrier gas, dry nitrogen, was replaced by air. It was observed that the presence of oxygen, a weak electron acceptor, reduced the sensitivity and thus increased the sensing limit to hundreds of ppb. Results of experiments with moisture added showed that the interference of moisture was quite severe.

• Journal of the Korean Chemical Society
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• v.42 no.1
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• pp.42-50
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• 1998

Titanium dioxide $(TiO_2)$ thin film samples were prepared by using spray pyrolysis methodology and were by using X-ray photoelectron spectroscopy and X-ray diffraction analysis. It was found that anatase prepared by the hydrolysis of titanium(Ⅳ) oxyacetylacetonate exhibited the largest specific surface area. The particle size increased with increasing temperature, while the thickness decreased. Titanium dioxide $(TiO_2)$ in the anatase form was prepared at $400^{\circ}C$ and the photoconductivity was determined using photocurrent measurements. Photoelectrochemical properties of the $TiO_2$-phthalocyanine system were measured in a three-electrode system. The photocurrent action spectrum in the visible region coincided with intrinsic absorption spectrum of phthalocyanine. The crystal structure of phthalocyanine is considered to be a very important property in the photogeneration phenomena.

• Electrical & Electronic Materials
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• v.7 no.5
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• pp.409-416
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• 1994

A double layered photoreceptor using phthalocyanine dye was made by dip-coating method. The under cutting layer(UCL) was coated with A1$\_$2/O$\_$3/ or polyamide, and the charge generation layer(CGL) was formed by .tau.-type metal-free phthalocyanine. The oxadiazole was used as a charge transport layer(CTL) and polycarbonate and poly(vinyl butyral) was employed as a host polymer. The .tau.-H$\_$2/Pc had an absorption peak around 780nm, which coincided with the emitting wavelengths of GaAlAs diode lasers. Maximum charge acceptance of CTL that gives thickness of 12.mu.m was -900V by corona charge of -6.0kV. In photo-induced discharge measurements, residual potential was less than -20V and sufficient for ordinary use, and sample films using of poly(vinyl butyral) was showed good charge retention. In printing test, drum that was employed polycarbonate as a host polymer showed the good print quality.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.10a
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• pp.195-196
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• 2018

We have investigated electrical and optical characteristics of $H_2Pc$ introduced OLED devices. $H_2Pc$ layer acted on tunnel barrier for incident electrons. we have also observed that energy band of the proposed structure was varied as applied electric field by simulation using TCAD program.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1999.10a
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• pp.449-450
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• 1999

VOCs(volatile organic compounds)는 대기중에서 질소산화물과 함께 광화학반응에 참여하여 인체 및 동식물에 유해한 오존 등 2차 오염물질인 광화학산화물을 형성하는 전구물질로 작용한다. 1998년 8월 미국 EPA에서는 휘발성유기화합물과 지표 부근의 오존 또는 스모그의 발생량을 감소시키기 위해 페인트, 세제 및 살충제의 제조공법에 관한 새로운 규칙을 발표하여 휘발성 용제 사용 규제를 강호하고 있다(과학기술부, 1998).(중략)

• Proceedings of the Korean Fiber Society Conference
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• 1998.04a
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• pp.338-341
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• 1998

악취의 주원인은 염기성 취기의 대표인 암모니아, 산성 취기의 대표인 황화수소, 그리고 트리메틸아민이며, 이들은 법정 악취물질로써 지정되어 있다$^1$. 이와 같은 악취를 없애는 소취기구는 활성탄 및 제오라이트 등과 같은 물질에 대한 물리적 흡착에 의한 것, 산화제 및 환원제에 의한 화학반응에 의한 것, 미생물 및 효소에 의한 생물학적 반응에 의한 것으로 대별되지만, 물리 흡착은 재방출의 문제가 있고 화학 및 생물학적 반응에는 소취성분 자체의 유해성 및 반응후 물질의 유해성이 문제가 되는 경우가 있다.(중략)

• Polymer(Korea)
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• v.38 no.5
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• pp.671-675
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• 2014

Well-defined star shaped and linear block copolymers were synthesized to study the dispersion stability of copper phthalocyanine (CuPc). We synthesized dispersants using (2-dimethylamino) ethyl methacrylate (DMAEMA) and poly(ethylene glycol) methyl ether methacrylate) (PEGMA) by activators generated by electron transfer (AGET) atom transfer radical polymerization (ATRP). pDMAEMA-b-pPEGMA copolymers were characterized by GPC and NMR. Furthermore, we studied the effect of the dispersion stability of copper phthalocyanine by controlling the degree of polymerization of PEGMA as a stabilizing group. The 4-arm star shaped polymeric dispersant showed better dispersion stability of CuPc at $25^{\circ}C$ for 7 days.