Abstract:
PURPOSE: A manufacturing method of a chiral alcohol compound is provided to regenerate the cofactor of an oxidoreductase with the high efficiency of 40% and to manufacture a chiral alcohol compound in a (R)-shape, thereby being with the optical activity of 80% from a ketone compound through an enzymatic reaction. CONSTITUTION: A manufacturing method of a chiral alcohol compound using a photo-biosystem comprises a step of a putting phosphorous-buffering solution, a cofactor of an oxidoreductase, an oxidation and reduction medium, a graphene-porphyrin optical catalyst, a non-polar organic solvent, an alcohol dehydrogenase, and a ketone derivative into a reactor and mixing the material while light is applied into the reactor under an inert gas atmosphere to conduct the reduction reaction of the ketone derivatives, thereby obtaining the chiral alcohol compound. The oxidation reduction medium is at least one selected from methyl viologen, a ruthenium (II) composite, and a rhodium (III) composite.
Abstract:
PURPOSE: A novel graphene photocatalyst absorbing visible light, a regeneration method of oxidoreductase cofactor using the same, and a manufacturing method of formic acid from carbon dioxide with an enzyme reaction using the same are provided to be economic and environment-friendly, to enable the mass production and automation, and to be able to be usefully used in a novel manufacture industry in which artificial photosynthesis which selectively manufactures various compounds by fixing carbon dioxide which is global warming gas. CONSTITUTION: A novel graphene composite is represented by Chemical formula 1. The novel graphene composite is used as a photocatalyst absorbing visible light. A regeneration method of oxidoreductase cofactor comprises a step of inputting a phosphate buffer solution; oxidative oxidoreductase cofactor methyl viologen; at least one oxidation-reduction medium selected from the group consisting of a ruthenium (II) composite and a rhodium (III) composite; and the graphene photocatalyst absorbing visible light represented by Chemical formula 1 in a reactor, and stirring while applying light to produce a reductive oxidoreductase cofactor.
Abstract:
PURPOSE: A novel visible light absorption grapheme-porphyrin photocatalyst and a method for regenerating oxidoreductase cofactors are provided to save energy. CONSTITUTION: A novel graphene-porphyrin complex is denoted by chemical formula 1. A visible light absorptioin grapheme-porphyrin photocatalyst contains the novel grapheme-porphyrin complex as an active ingredient. A method for regenerating oxidorductase cofactors comprises: a step of mixing phosphate buffer, oxidative oxidoreductase cofactor, methyl viologen, luthenium(II) complex or rhodium(III) complex and the photocatalyst in a reactor; and a step of applying light and stirring. The cofactor is NAD+, NADP+, FAD+ or FMN+.
Abstract:
본 발명은 인듐 나노입자의 제조방법에 관한 것으로서, 더욱 상세하게는 질소(N)나 인(P) 원소를 함유하는 특정의 유기용매와 특정의 반응온도 조건에서 염화인듐(InCl 3 )과 금속 나트륨(Na)을 반응하여 인듐 나노입자를 제조하는 신규의 방법으로, 종래에 비해 낮은 반응온도에서 보다 경제적으로 나노크기를 갖는 인듐 입자의 제조가 가능하여 단전자 트랜지스터, 바이오나노 기술, 나노지로그래피, 인듐포스파이드(InP)의 출발물질 등의 여러 나노기술 분야에 적용 가능한 신규한 인듐 나노입자의 제조방법에 관한 것이다. 염화인듐, 금속 나트륨, 질소(N)나 인(P) 원소를 함유하는 유기용매, 인듐 나노입자
Abstract:
A method for preparing colloidal oil-soluble iron oxide nano-particle with high dispersity and stability is provided to improve dispersity of the particle in organic solvent and to employ the particle in magnetic recording medium, printer ink, paint additive, ferrofluild, etc. by preparing iron hydroxide slurry and capping surface of the slurry in fatty acid and petroleum solvent to form the nano-particle. The method includes the steps of: preparing iron hydroxide by reacting iron precursor compound with basic compound containing alkaline metal, alkaline earth metal or ammonium cations to form microfine iron hydroxide, precipitating and washing the product; preparing amorphous colloidal iron hydroxide nano-particles by blending the washed product with C10 to C30 fatty acid and petroleum solvent; and preparing iron oxide nano-particles after separating the colloidal iron hydroxide nano-particles into water phase and organic phase, removing the water phase and water content from the organic phase.
Abstract:
본 발명은 고 친유성 산화마그네슘 나노입자의 제조 방법에 관한 것으로서, 더욱 상세하게는 마그네슘 화합물과 염기를 반응하여 침전 및 세척한 다음, 저온 소성하여 산화마그네슘을 제조하고, 상기 제조된 산화마그네슘을 특정의 지방산과 석유계 용제를 이용하여 표면을 캡핑(capping)처리하는 일련의 공정으로, 구형이고, 균일한 나노 입자 크기를 가져 단위 부피 당 차지하는 입자의 표면적이 클 뿐만 아니라 표면처리에 의해 유계 용제내에서 분산성이 종래에 비해 월등히 향상되어, 내열 재료, 고온 절연 및 광학 등의 여러 산업 분야 특히, 연료 첨가제 분야에 매우 유용한 고 친유성 산화마그네슘 나노입자의 제조 방법에 관한 것이다. 저온 소성, 표면처리, 친유성, 산화마그네슘 나노입자
Abstract:
본 발명은 직접메탄올 연료전지(DMFC)용 술폰산 함유 폴리아릴에테르벤즈이미다졸 전해질 및 이를 이용한 전해질 복합막에 관한 것으로서, 더욱 상세하게는 내열성, 기계적 물성 및 용해성 등의 우수한 성질을 가지고 있는 술폰산 함유 폴리아릴에테르벤즈이미다졸을 반복단위로 하는 신규의 고분자 전해질과, 상기한 고분자 전해질을 지지체에 코팅하여 제조된 것으로 이온전도도 및 메탄올 투과도가 현저히 감소되어 직접메탄올 연료전지(DMFC)의 전해질막으로 유용한 전해질 복합막에 관한 것이다.
Abstract:
본 발명은 다공성 나노탄소섬유 지지체의 제조방법과 이를 이용한 직접메탄올 연료전지용 전극촉매 및 그 제조방법에 관한 것으로, 본 발명의 다공성 나노탄소섬유 지지체의 제조방법은 통상의 방법을 통하여 얻어진 다공성 나노탄소섬유를, 알곤 기류하에서 고온 열처리 한 후 증류수에 분산시키고 초음파처리 후 원심분리하고 95-105 o C의 온도에서 진공건조 하는 것을 특징으로 하며, 본 발명의 전극촉매의 제조방법은 상기 방법에 의하여 제조된 다공성 나노 탄소섬유 지지체에, 백금 (H 2 PtCl 6 ) 및 루테늄(RuCl 3 ) 이온을 흡착시킨 후 상온에서 환원시약으로(NaBH 4 ) 환원시키는 것을 특징으로 한다.
Abstract:
PURPOSE: A mixed metal sulfide based photocatalyst used in manufacturing hydrogen from water by photoreaction is provided, a method for manufacturing the same is provided, and a method for manufacturing hydrogen using the same is provided. CONSTITUTION: The mixed metal sulfide based photocatalyst for generating hydrogen is characterized in that it has the following general formula 1: MxM1yS, where M is a metal selected from Al, Cu, Ag, Sn and Zn, M1 is a metal selected from Pb, Fe, Mo, Ag, Cu, Ni and Al, x for showing a mixing ratio represented in an atom% of M/(M+M1) has a value of 5.0 to 95.0, and y for showing a mixing ratio represented in an atom% of M1/(M+M1) has a value of 5.0 to 95.0.