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分级多孔Cafe2O4/C的合成及其微波催化活性
宋艺,孔超,李嘉*
作者单位E-mail
宋艺 铁酸钙微波催化活性木棉降解  
孔超 铁酸钙微波催化活性木棉降解  
李嘉* 铁酸钙微波催化活性木棉降解 mse_lij@ujn.edu.cn 
摘要:
以天然木棉为模板,利用造孔及纳米颗粒自组装两步法合成了分级多孔的Cafe2O4/C复合催化剂. Cafe2O4/C复合催化剂保留了木棉模板的中空纤维形貌,且该中空纤维是由碳及均匀分布在碳表面的Cafe2O4纳米颗粒组成. 该复合催化剂具有较强的甲基紫微波催化降解活性. 研究了Cafe2O4负载量、微波功率、催化剂用量、甲基紫的初始浓度和pH值对微波诱导甲基紫降解的影响. 结果表明,Cafe2O4/C微波降解甲基紫的催化反应具有较高的反应速率和较短的反应时间. 其降解反应符合一级动力学模型. Cafe2O4/C 高的催化活性得益于催化反应和吸附特性之间的协同作用.
关键词:  铁酸钙,微波,催化活性,木棉,降解
DOI:10.1063/1674-0068/28/cjcp1407125
分类号:
基金项目:
Synthesis of Hierarchically Porous Cafe2O4/Carbon Fiber Hybrids and Microwave Induced Catalytic Activity (cited: 2)
Yi Song,Chao Kong,Jia Li*
Abstract:
Hierarchically porous CaFe2O4/carbon ber hybrids with enhanced microwave induced cat-alytic activity for the degradation of methyl violet (MV) from water were synthesized from kapok by a novel two-step process coupling pore-fabricating and nanoparticles assembling. The as-prepared samples exhibited characteristic hollow ber morphology, CaFe2O4 nanopar-ticles dispersed uniformly on the surface of hollow carbon fibers (HCF). The effects of various factors such as CaFe2O4 loading, microwave power, catalyst doses, initial concen-tration of MV solution and pH value on the microwave induced degradation of MV over CaFe2O4/HCF were evaluated. It was found that the microwave induced degradation of MV over CaFe2O4/HCF had high reaction rate and short process time. The kinetic study indicated that the degradation of MV over CaFe2O4/HCF followed pseudo-first-order kinet-ics model. The high catalytic activity of CaFe2O4/HCF was facilitated by the synergistic relationship between microwave induced catalytic reaction and adsorption characteristics.
Key words:  Cafe2O4, Microwave, Catalytic activity, Kapok, Degradation