CCVD法制碳纳米管用Ni-Mg-O催化剂的制备研究  

Study of Preparation of Ni-Mg-O Catalysts for Growth of Carbon Nanotubes by CCVD Method

作　　者：周金梅[1] 刘志铭[1] 林国栋[1] 张鸿斌[1] 

机构地区：[1]厦门大学化学化工学院,固体表面物理化学国家重点实验室,醇醚酯化工清洁生产国家工程实验室,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2011年第5期867-872,共6页Journal of Xiamen University：Natural Science

基　　金：国家重点基础研究发展计划(973)项目(2009CB939804);福建省重大专项专题项目(2009HZ0002-1);福建省发改委高技术项目(闽发改高技2009-1030)

摘　　要：用草酸盐共沉淀法制备一类固溶体型NixMg1-xO纳米催化剂.该类催化剂用于甲烷催化分解合成碳纳米管(CNTs)显示出优良的性能.催化剂的制备优化研究揭示,催化剂的金属元素组成、氧化前驱物的焙烧和还原的温度对催化剂的性能有强烈的影响.在经优化的制备条件(n(Ni)∶n(Mg)=0.5:0.5,焙烧温度873 K,H2-还原温度973 K)下制备的Ni0.5Mg0.5O催化剂上,在经优化的制管反应条件(873 K,甲烷原料气GHSV=5×104mL/(h.g))下,反应2 h的CNTs产物的产率达到14.5 g/g.A solid-solution type of NixMgl-xO nanocatalysts was prepared by an oxalate method. The catalysts display excellentperformance for growth of carbon nanotubes （CNTs） from catalytic decomposition of CH4 by CCVD method, The investigation of optimization of preparation conditions for the catalyst showed that the Ni/Mg molar ratio in the catalyst composition and the temperatures for calcination and reduction-activation of catalyst precursor have significant effects for the performance of the catalyst. Over the Ni0.5 Mg0.5 O catalyst,which was prepared.with the optimized conditions （n（Ni）：n（Mg）=0.5 ： 0.5,873 K and 973 K for calcination-temperature and reduction-temperature, respectively）, under the reaction conditions of atmospheric pressure, 873 K, GHSVCH4 =5×10^4 mL/（h, g） ,the yield of CNTs-products with the reaction proceeding for 2 h reached 14.5 g/g.

关 键 词：碳纳米管 催化生长碳 NixMg1-xO纳米催化剂 分解沉积 

分 类 号：O643[理学—物理化学]