Abstract:
본 발명은 황화수소 광분해용 금속산화물계 광촉매와 클라우스 공정을 대체하는 상기 촉매를 이용한 황화수소의 광분해 방법에 관한 것으로서, 더욱 상세하게는 밴드갭 에너지(band gap energy)가 2.3 ∼ 4.3 eV 범위이고 광에 의한 부식 저항성 및 광흡수율이 향상되어 황화수소의 분해능을 가진 신규의 금속산화물계 광촉매와, 그리고 기존의 황화수소를 물과 황으로 분해하는 클라우스 공정과는 전혀 다른 개념의 것으로 상기한 금속산화물계 광촉매의 황화수소에 대한 우수한 광분해 활성을 이용하여 황화수소로부터 청정에너지원인 수소를 직접 생산하는 새로운 개념의 황화수소의 광분해 방법에 관한 것이다. 금속산화물계 광촉매, 황화수소, 광분해
Abstract:
본 발명은 인듐 포스파이드(InP)의 나노입자 양자점의 제조 방법에 관한 것으로서, 하기의 화학식 VII 및 VIII의 두 단계반응 방법으로 제조되어지는 것을 특징으로 하며, 본 발명을 통하여 제조공정이 단순화되고, 안정적이며 폭발의 위험성이 없는 물질을 사용하여 인듐포스파이드(InP) 나노입자 양자점을 선택적으로 제조할 수 있게 되었다.
Abstract:
PURPOSE: Provided is a thin-film photoelectrode made of ion-added titanium oxide compound which is used for converting light energy to electric energy. And a method for preparing the same and a method for generating photoelectrical current using the same are also provided. CONSTITUTION: The thin-film photoelectrode made of titanium oxide compound is represented by the formula (1) CG/TixMyO2: wherein, CG is a conducting glass, which collects photoelectrical current generated from a semiconductor, such as indium tin oxide glass or SnO2 glass; M is ionic materials added to synthesize the titanium oxide semiconductor compound and is selected from the group consisting of P, As, Sb, Cr, V, Mo, Mn, Re, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Al, Ga, Sn, Pb, S, Y, Rb, Na, Mg and Ca; x represents atom % of Ti/(Ti+M) and is 92.00-99.99; and y represents atom % of M/(Ti+M) and is 0.01-8.00. The method for preparing the thin-film photoelectrode of titanium oxide compound comprises steps of: (i) gradually adding Ti(OCH(CH3)2)4 mixed with isopropyl alcohol to distilled water to make atom % of Ti/(Ti+M) be 92.00-99.99 under nitrogen atmosphere and intensely stirring the solution for 5-20 minutes; (ii) after adding HNO3 to the obtained solution of the step (i) until the pH value gets 1-2 to accurately deposit titania, adding ionic materials to the solution to make atom % of M/(Ti+M) be 0.01-8.00; (iii) intensely mixing the solution at a temperature of 60-100 deg.C for 5-10 hours and then evaporating water to obtain sol having viscosity; (iv) after dropping fixed amount of the obtained sol on ITO plate to coat the plate with the sol in order to have uniform thickness, sintering the ITO plate at a temperature of 200-550 deg.C for 30-60 minutes.
Abstract:
PURPOSE: A method for preparing 2-hydroxy-4-octyloxybenzophenone of a benzophenone-based photostabilizer is provided, to improve the selectivity of the product(a yield of 95% without the generation of isomers). CONSTITUTION: The method comprises the step of mixing 2,4-dihydroxybenzophenone and octyl halide with a molar ratio of 2.0:1.8 to 2.0:3.0 (See the reaction scheme 1). In the reaction scheme 1, X is Cl, Br or I. Preferably the reaction temperature is 120-160 deg.C and the reaction time is 5-12 hours. Preferably an acid neutralizer(Na2CO3), a reaction catalyst(KI) and a reaction solvent(PEG400 : poly(ethylene glycol), a mean molecular weight 400) are employed. The molar ratio of Na2CO3 to 2,4-dihydroxybenzophenone is 2.0:0.5 to 1:1, and the molar ratio of KI is 0.05-0.10 mol% based on the weight of 2,4-dihydroxybenzophenone.
Abstract translation:目的:提供二苯甲酮类光稳定剂的2-羟基-4-辛氧基二苯甲酮的制备方法,提高产物的选择性(产率95%,不产生异构体)。 方案:该方法包括以摩尔比2.0:1.8至2.0:3.0混合2,4-二羟基二苯甲酮和辛基卤化物的步骤(参见反应方案1)。 在反应方案1中,X为Cl,Br或I.优选反应温度为120-160℃,反应时间为5-12小时。 优选使用酸中和剂(Na 2 CO 3),反应催化剂(KI)和反应溶剂(PEG400:聚(乙二醇),平均分子量400)。 Na 2 CO 3与2,4-二羟基二苯甲酮的摩尔比为2.0:0.5:1:1,基于2,4-二羟基二苯甲酮的重量,KI的摩尔比为0.05-0.10mol%。
Abstract:
PURPOSE: A photocatalyst for generating hydrogen is provided to activate the photo catalyst in a sunbeam area as well as in a visible ray area, to increase generating amount of hydrogen and to make the life span of the catalyst semi-permanent. CONSTITUTION: A photo catalyst is indicated as a chemical formula, m(A)/Cd(M(B))S. A method for producing the photo catalyst is composed of the steps of: dissolving a compound containing Cd and M to make mole % of M 0.05 to 20.00; stirring the dissolved compound after giving the compound H2S or Na2S as a reactor to gain a Cd£M|S deposit; cleansing the deposit with water until pH keeps 7; drying the cleansed deposit in a vacuum under a nitrogen atmosphere, and doping the deposit by giving the deposit liquid compound containing m to be 0/10 to 2.50wt% of m content. The m stands for doped metal.
Abstract:
PURPOSE: A photo catalyst having a semi-eternal life span is provided to activate a catalyst in a visible ray area regulated with a photo filter and to improve the amount of generating hydrogen. CONSTITUTION: In an equation of Pt(x)Zn/£M(y)|S, x shows a weight percentage of Pt and has a 0.05 to 2.50 value, and M is an element metal selected among V, Cr, Mo, Mn, Re, Fe, Ru, Os, Rh, Ir, Ni, Cu, Al, Ga and P. In addition, y shows a mole % of M/(M+Zn) and has a 0.01 to 20.00 value. Herein, a compound containing Zn and M is dissolved in water so M as to be 0.01 to 20, and H2S or Na2S is given in the compound to obtain a Zn(M)S deposit. Then, the deposit is washed with water until pH becomes 7, and the washed deposit is dried. The Pt compound of a liquid phase is given in the dried Zn(M)S deposit so the Pt content as to be 0.05 to 2.50 wt%, and an ultra violet photo is injected to dope Pt on Zn£M|S in a nitrogen atmosphere. Then, it is washed and dried again until pH becomes 7, oxidation-calcined at 280 to 420°C for 1 to 3 hours and reduction-calcined at 280 to 420°C for 1 to 3 hours.