低温高效催化分解过氧化氢的Co-SiO_2催化剂  

Co-SiO_2 Catalysts for Highly Efficient,Catalytic Decomposition of H_2O_2 at Low-temperature

作　　者：袁强[1] 李辉[1] 吴迎秋[1] 杨乐夫[2] 

机构地区：[1]贵州大学化学与化工学院,贵州贵阳550025 [2]厦门大学化学化工学院,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2010年第4期589-592,共4页Journal of Xiamen University：Natural Science

基　　金：贵州省科学技术基金(20072013);贵州大学人才基金(X060025)

摘　　要：H2O2常在工业和实验室过程中用作绿色氧化剂,但其残留量需要分解处理,否则会对环境造成一定的污染.采用溶胶凝胶法合成M-SiO2（M=Ni、Zn、Fe、Bi、Cu、Al、Cd、Co）催化剂.考察了催化剂在低温条件下（5~20℃）对H2O2的催化分解性能,结果表明Co-SiO2催化剂对H2O2表现出优异的催化分解作用.当Co质量分数为8.0%时,Co-SiO2催化效果达到最佳.在5~20℃范围内,0.05 g 8.0%Co-SiO2催化剂对H2O2均表现出优异的催化分解性能.5℃下反应40 min时,10 mL 1.0 mol/L H2O2分解率为71.7%,20℃下分解率几乎达到100%.并以XRD对代表性的Co-SiO2催化剂进行表征,结果表明Co在SiO2中可能处于高分散状态.Hydrogen peroxide is often used as a green oxidizing reagent in both industry and lab processes. Its residues have to be decomposed,otherwise will lead to polluting the environment in some degree. In this paper,M-SiO2（M=Ni,Zn,Fe,Bi,Cu,Al,Cd,Co） catalysts were synthesized by sol-gel method. The catalytic properties of catalysts on decomposition of H2O2 were investigated at low temperature （5℃ to 20 ℃）. Among these catalysts,the results showed that the Co-SiO2 catalysts displayed excellent catalytic per-formance on decomposition of H2O2 in the range of 5℃ to 20℃. At 5℃ ,0. 05 g 8.0%（by mass） Co-SiO2 catalyst after reacting 40 min with 10 mL 1.0 mol/L H2O2, H2O2 decomposition rate was 71.7%;at 20℃, it was nearly 100 %. The representative Co-SiO2 catalysts were characterized by XRD. The results indicated that the Co is highly dispersed in SiO2.

关 键 词：H2O2 溶胶凝胶法 分解 CO SIO2 

分 类 号：O643.32[理学—物理化学]