常压水热法合成玉米棒状In_2O_3及其性能研究  

Preparation of Cob-shaped In_2O_3 by Hydrothermal Method Under Atmospheric Pressure and Their Properties

作　　者：吕宝华[1] 李玉珍[2] 黄健[1] 姚陈忠[1] 

机构地区：[1]运城学院应用化学系,山西运城044000 [2]运城学院机电公共实验中心,山西运城044000

出　　处：《合成化学》2017年第4期330-334,共5页Chinese Journal of Synthetic Chemistry

基　　金：国家自然科学基金资助项目(21576230);山西省自然科学基金资助项目(2013011009-3);运城学院产学研科研项目(CY-2013002)

摘　　要：以In(NO_3)_3·4.5H_2O和(NH_2)_2CO为原料,采用常压水热法于95℃反应22 h制得氧化铟(In_2O_3)前驱物氢氧化铟,于600℃煅烧2 h合成了In_2O_3粉体,其结构、形貌及性能经紫外-可见(UV-Vis)光谱、X-射线衍射(XRD)、拉曼光谱和扫描电镜(SEM)表征。以甲基橙为目标降解物,研究了In_2O_3粉体的光催化活性。结果表明:In_2O_3粉体为体心立方晶系方铁锰矿结构和亚稳相刚玉六方结构的混合体,In_2O_3的UV-Vis谱图中出现了明显的蓝移。当In(NO_3)_3·4.5H_2O和(NH_2)_2CO物质的量比为1∶7时,In_2O_3粉体中出现了玉米棒状结构,棒状体长度约为500 nm,直径约150 nm;该棒状结构的In_2O_3对甲基橙有较好的光催化活性,在紫外光照射6.5 h后甲基橙的降解率为69.7%。The In2O3 precursor, indium hydroxide, was prepared by reaction at 95 ℃ for 22 h under atmospheric pressure via hydrothennal method, with In（ NO3 ） 3 · 4.5H2O and （ NH2 ）2 CO as the raw materials. The In2O3 powder was synthesized by calcining of indium hydroxide at 600 ℃ for 2 h. The structure, morphology and properties of the InSO3 powders were characterized by ultraviolet-visible spectrophotometry（ UV-Vis）, X-ray diffraction（XRD） , raman spectrometer and scanning electron mi- croscope （SEM）. The photocatalytic activity of the In2 O3 powders for degradation of methyl orange was studied. The results showed that the In2O3 powder is a mixture of body-centered cubic bixbyite-type crystal and metastable corundum-type hexagonal structure, and the blue shift of the In2O3 is apparent in the UV-Vis spectrum. As the amount proportion of In（NO3 ）3 ·4.5H2O and （NH2）2CO was 1：7, the rod-shaped structure was appeared in the In2O3 powder, the rod body length and diameter were a- bout 500 nm and 150 nm, respectively. The rod like structure of In2O3 exhibited good photocatalytic activity, and the degradation rate of methyl orange was 69.7% after 6.5 h of UV light irradiation.

关 键 词：硝酸铟 尿素 玉米棒状氧化铟 水热法 合成 光催化 

分 类 号：O611.62[理学—无机化学] O643.3[理学—化学]