氢氧化铟/活性炭协同吸附-光催化复合材料的制备及其甲苯降解性能  

Preparation of Adsorption-photocatalytic Synergistic In(OH)_3/AC Composites for Removal of Toluene Vapor in Air

作　　者：李长玉[1] 吴鹏[1] 樊星[1] 刘守新[1] 

机构地区：[1]东北林业大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《林产化学与工业》2016年第2期9-14,共6页Chemistry and Industry of Forest Products

基　　金：中央高校基本科研业务费专项资金项目(2572015EB01);国家自然科学基金资助项目(30771692)

摘　　要：以In(NO_3)_3·4.5H_2O和六亚甲基四胺(HMT)为起始物,以活性炭(AC)为载体,采用一步水热原位合成法制备In(OH)_3/AC协同吸附-光催化复合材料,采用XRD、FT-IR、DRS、SEM以及TEM等方法对复合材料的晶相结构、表面结构等进行了表征,并测试了复合材料对甲苯的光催化降解性能。结果表明,AC与In(OH)_3是采用化学键结合;AC的加入不仅影响了In(OH)_3的成核与熟化过程,改变了In(OH)_3的晶胞结构,使晶面间距变小、粒径增加,而且降低了其结晶度;但是AC仅影响复合材料对光的吸收强度,对In(OH)_3能阈结构和粒子形貌基本没有影响。复合材料对甲苯的光催化降解测试结果显示,加入适量的AC(3%)所产生的吸附-催化协同效应可以有效地提高材料的光催化性能,光照60 min时,甲苯的降解率可达98.25%。In（ OH）3/ AC composites were prepared by one-step hydrothermal situ method using In（ NO3）3 and hexamine（ HMT）as precursor and activated carbon（ AC） as carrier. XRD,FT-IR,UV-vis diffuse reflectance spectroscopy（ DRS）,SEM and TEM were used to characterize the obtained composites. Toluene was used as a probe molecule to investigate the photocatalytic activity of the obtained composites. The results showed that the conjugation effect was presented between the AC bulk and In—O bond and the addition of AC not only affected the particle size distribution of In（ OH）3but also reduced the interplanar spacing and the degree of crystallinity of In（ OH）3. AC has relationship with the adsorption intensity of composites,and has no apparent relations with the energy band structure and particle of morphology In（ OH）3. The degradation rate of toluene was 98. 25% under UV irradiation 60 minutes when the addition of AC was 3%. This showed that the appropriate amount of activated carbon could effectively improve the photocatalytic performance of composites because In（ OH）3/ AC catalysts had synergetic effect of AC adsorption and In（OH）3photocatalysis on the degradation of toluene.

关 键 词：氢氧化铟 活性炭 甲苯 光催化剂 降解 

分 类 号：TQ35[化学工程] O643[理学—物理化学]