天然闪锌矿可见光催化降解CCl_4实验研究  

An Experimental Study on Photocatalytic Reduction of CCl_4 by Natural Sphalerite Under Visible Light Irradiation

作　　者：杨心鸽[1,2] 鲁安怀[1,2] 李艳[1,2] 王长秋[1,2] 颜云花[1,2] 

机构地区：[1]北京大学造山带与地壳演化教育部重点实验室,北京100871 [2]北京大学地球与空间科学学院,北京100871

出　　处：《矿物学报》2010年第1期18-25,共8页Acta Mineralogica Sinica

基　　金：国家重点基础研究发展计划资助项目(课题编号:2007CB815602);国家自然科学基金项目(40902016)

摘　　要：研究了天然闪锌矿可见光催化还原降解四氯化碳(CCl4)的能力,并系统探讨了光源、闪锌矿用量、电子供体和溶解氧对N,N-二甲基甲酰胺有机体系中CCl4降解效果的影响,获得了该光催化反应体系的最佳实验条件。在可见光下,闪锌矿用量为1g/L,电子供体为甲酸0.5mol/L,溶解氧含量为空气平衡时,经8h光照反应,CCl4降解率达91.48%。通过GC-MS对降解产物进行分析,提出了天然闪锌矿在改有机体系中可见光催化还原降解CCl4的机理。The photocatalytic reduction of CCl4 in natural sphalerite suspension under visible light irradiation was examined.The effects of sphalerite dosage,electron donors and dissolved oxygen on CCl4 degradation rate were discussed in N,N-dimethylformamide（DMF） organic solvent system.And the optimum experiment condition was obtained based on series trials,namely sphalerite dosage was 1 g/L,electron donor was formic acid with concentration of 0.5 mol/L,and dissolved oxygen condition is air equipment.Under the best experiment condition,CCl4 was degraded 91.48% after being illuminated for h8h with visible light.The degradation mechanism was discussed based on the analysis of degradation products.

关 键 词：天然闪锌矿 光催化还原 四氯化碳 可见光 N N-二甲基甲酰胺 

分 类 号：O644.19[理学—物理化学] P578.2[理学—化学]