醇热法制备球形TiO_2及其光催化活性研究
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摘要
以钛酸四丁酯为钛源,乙醇和丙三醇混合液为溶剂,采用醇热法制备球形二氧化钛(TiO_2)。考察了丙三醇的用量对产物结构和性能的影响。以盐酸四环素为目标物,考察了制得的纳米TiO_2的光催化活性。研究结果表明:丙三醇与乙醇的体积配合比1∶0.2制得的球形纳米TiO_2对盐酸四环素的光催化降解效果最佳,在纳米TiO_2光催化剂投加量为1g/L,盐酸四环素为0.1g/L,紫外光或模拟太阳光照2h条件下,对盐酸四环素的降解率分别达到98.58%和90.00%。
The spherical TiO_2 was prepared by the glycol-thermal method,using tetra-butyl titanate as the titanium source,ethanol and glycerol as solvent.The influence of the ratio of glycerol on the structure and performance of products was investigated.The photocatalytic activity of TiO_2 was studied by photocatalytic degradation of tetracycline hydrochloride.The results indicated that the spherical nano TiO_2,prepared by the volume ratio of glycerol to ethanol 1∶0.2 showed the optimal photocatalysis.When the dosage of nano-TiO_2 was 1 g/L and the concentration of tetracycline hydrochloride was 0.1 g/L,the degradation rate of tetracycline hydrochloride could reach to 98.58% and90.00% under ultraviolet light or simulated sunlight for 2 h,respectively.
The spherical TiO_2 was prepared by the glycol-thermal method,using tetra-butyl titanate as the titanium source,ethanol and glycerol as solvent.The influence of the ratio of glycerol on the structure and performance of products was investigated.The photocatalytic activity of TiO_2 was studied by photocatalytic degradation of tetracycline hydrochloride.The results indicated that the spherical nano TiO_2,prepared by the volume ratio of glycerol to ethanol 1∶0.2 showed the optimal photocatalysis.When the dosage of nano-TiO_2 was 1 g/L and the concentration of tetracycline hydrochloride was 0.1 g/L,the degradation rate of tetracycline hydrochloride could reach to 98.58% and90.00% under ultraviolet light or simulated sunlight for 2 h,respectively.
引文
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[18]李珊.球形化高氯酸铵的制备与表征及其热分解性能研究[D].北京:北京理工大学,2015.
[2]胡彦杰,李春忠.气相燃烧法制备纳米材料的研究进展[J].中国材料进展,2012,31(3):44-55.
[3]吴腊英,李长江.纳米二氧化钛粉末的溶胶-凝胶法合成及晶相转化[J].无机化学学报,2002,18(4):139-143.
[4]黄旭,姜小龙,张刚生,等.水热辅助液相合成TiO2及其光催化性能的研究[J].广东化工,2016,43(12):12-13.
[5] Zhang L J,Menendez-Flores V M,Murakami N,et al.Improvement of photocatalytic activity of brookite titanium dioxide nanorods by surface modification using chemical etching[J].Applied Surface Science,2012,258(15):5803-5809.
[6] Chen C,Wang Z Y.Synthesis and crystal growth mechanism of titanium dioxide nanorods[J].Journal of Inorganic Materials,2012,27(1):45-48.
[7] Zheng Y H,Zheng L R,Zhan Y Y,et al.Ag/ZnO heterostructure nanocrystals:synthesis,characterization,and photocatalysis[J].Inorg Chem,2007,46(17):6980-6986.
[8] Niederberger M,Bard M H,Stucky G D.Benzyl alcohol and transition metal chlorides as a versatile reaction system for the nonaqueous and low-temperature synthesis of crystalline nano-objects with controlled dimensionality[J].J Am Chem Soc,2002,124:13642-13643.
[9] Chen D,Shen G Z,Tang K B,et al.Aligned SnS2nanotubes fabricated via a template-assisted solvent-relief process[J].Appl Phys A,2003,77:747-749.
[10]朱建,曹艳凤,卞振峰,等.双醇诱导自组装制备多级蛋壳结构TiO2材料及其光催化性能研究[J].中国科学(化学),2012,42(11):1627-1635.
[11]孙静,高廉.TiCl4水解条件对相转变的影响[J].无机材料学报,2003,18(2):505-508.
[12] Golobostanfard M R,Abdizadeh H.Effect of mixed solvent on structural,morphological,and optoelectrical properties of spin-coated TiO2thin films[J].Ceramics International,2012,38(7):5843-5851.
[13]马娇娜,杨国龙,陈素琴,等.几种醇对Lipozyme RM IM催化卵磷脂乙醇解的影响及其工艺条件优化[J].食品科学,2014,35(22):92-6.
[14]段佳才.乙醇分子间脱水制乙醚[J].化学教育,1992,13(2):33-37.
[15]姚超,丁永红,李为民,等.有机表面修饰温度对纳米二氧化钛微结构的影响[J].无机材料学报,2009,24(3):438-42.
[16] Zhao Q,Shao Xing L I,Jiang T S,et al.Synthesis mesoporous titanium dioxide and their photocatalytic activity for decomposition of methyl orange[J].Chemical Research&Application,2007,534(12):1345-1348.
[17]黄文艺,史智鹏,程昊,等.溶剂热法制备纳米TiO2可见光光催化剂[J].广西科技大学学报,2016,27(3):89-94.
[18]李珊.球形化高氯酸铵的制备与表征及其热分解性能研究[D].北京:北京理工大学,2015.