TiO_2光催化氧化降解高沸醇木质素的研究  

Study on Degradation of High Boiling Solvent Lignin by TiO_2 Photochemical Catalysis

作　　者：陈婷[1] 陈云平[1] 张英[1] 程贤甦[2] 

机构地区：[1]闽江学院化学与化学工程系,福建福州350108 [2]福州大学材料科学与工程学院,福建福州350002

出　　处：《纤维素科学与技术》2010年第4期13-18,共6页Journal of Cellulose Science and Technology

基　　金：福建省自然科学基金项目(2006J0264);福建省教育厅科技项目(JA08182)

摘　　要：高沸醇木质素是利用高沸醇溶剂(HBS)法制备纸浆过程中获得的木质素,具有较高的化学活性。在TiO2光催化条件下,研究紫外光降解高沸醇木质素的结构变化,通过紫外分光光度法测定溶液吸光度来判断不同因素条件下高沸醇木质素降解的程度,包括TiO2加入量、光照强度、光照时间、氧化剂用量等。对降解产物进行红外谱图和GC-MS分析,结果表明木质素本身具有复杂的结构形式,经过降解后可以得到香草醛、愈创木基衍生物等小分子物质。High boiling solvent lignin is separated from biomass using 1,4-butanediol as the solvent,which has better chemical activity than traditional lignin.The influence of different factors such as the dosage of TiO2,the intensity of UV,the time of illumination and the dosage of oxidizing agent on the degradation ratio of HBS lignin was investigated by ultraviolet irradiation using TiO2 as photo-catalyst.The product of degradation was analyzed by IR and GC-MS.The results showed that the lignin was composed by complicated structure,which could be degraded to lower molecule substances such as vanilla or guaiacyl ramification.

关 键 词：高沸醇木质素 光催化 降解 

分 类 号：O636.2[理学—高分子化学] O643[理学—化学]