公开(公告)号：KR100831069B1

公开(公告)日：2008-05-22

申请号：KR1020070102100

申请日：2007-10-10

Applicant: 한국과학기술원

Inventor： 강정구 ,  사지오거스틴 ,  이정우 ,  신원호 ,  한규성 ,  최정훈

IPC: B01J23/745 ,  B82B3/00 ,  B01J37/34 ,  B01J23/75

CPC classification number: B01J23/74 ,  B01J21/185 ,  B01J35/10 ,  B01J37/0238 ,  B01J37/349 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/162 ,  C01B32/18 ,  Y10S977/775 ,  Y10S977/777 ,  Y10T428/12014

Abstract: A nano-sized metal crater catalyst having a crater-shaped hole structure formed in the center thereof is provided to obtain characteristics and structure of the nano material, a method for preparing the nano-sized metal crater catalyst is provided to simplify the process and treat a large quantity of metal nanoparticles at a low cost, and a nano material controlled to a desired structure by preparing the nano material using the metal crater catalyst is provided. A nano-sized metal crater catalyst is characterized in that vacancy and dislocation are formed in one or two metal nanoparticle(s) selected from the group consisting of iron(Fe) and cobalt(Co), and a crater-shaped hole with a diameter of 1 to 20 nm is formed in the center of the metal nanoparticle(s) having a height of 3 to 16 nm. A method for preparing a nano-sized metal crater catalyst comprises the steps of: (a) performing plasma pre-treatment of a film of metal nanoparticles deposited onto a substrate at a plasma power of 500 to 800 W and a temperature of 600 to 1000 deg.C in a nitrogen gas atmosphere with a nitrogen gas flow rate of 80 to 120 sccm to form vacancy and dislocation in the metal nanoparticles; and (b) performing chemical etching of the plasma pre-treated metal nanoparticle film for 2 to 4 hours by using a mixed solution comprising ethanol as a solvent and 10 to 30 %(v/v) of nitric acid containing 1 to 10 wt.% of iodine(I) relative to the ethanol to form a hole in the center of the metal nanoparticles. The metal is at least one selected from metal elements of Groups 3 to 14. The metal is one or two selected from the group consisting of iron(Fe) and cobalt(Co).

Abstract translation: 为了获得纳米材料的特性和结构，提供了一种具有形成在其中心的凹坑形孔结构的纳米级金属火山口催化剂，提供了一种制备纳米尺寸金属火山口催化剂的方法，以简化工艺和处理 提供了低成本的大量金属纳米粒子，以及通过使用金属火山口催化剂制备纳米材料而将其控制到所需结构的纳米材料。 纳米尺寸金属火山口催化剂的特征在于，在选自铁（Fe）和钴（Co）的一种或两种金属纳米颗粒中形成空位和位错，并且具有直径 在高度为3〜16nm的金属纳米粒子的中心形成1〜20nm。 制备纳米尺寸金属火山口催化剂的方法包括以下步骤：（a）以500至800W的等离子体功率和600至1000的温度进行沉积在基板上的金属纳米颗粒膜的等离子体预处理 在氮气气氛中，氮气流速为80〜120sccm，在金属纳米粒子中形成空位和位错; 和（b）通过使用包含乙醇作为溶剂的混合溶液和10至30％（v / v）含有1-10重量％的（V / V）的硝酸进行等离子体预处理的金属纳米颗粒膜的化学蚀刻2至4小时。 相对于乙醇的碘（I）的百分比在金属纳米粒子的中心形成一个孔。 金属是选自第3〜14族的金属元素中的至少一种。金属是选自铁（Fe）和钴（Co）中的一种或两种。