纳米TiO_2-硅藻土复合材料对染料的光催化降解性能
|
摘要
以TiOSO_4为钛源,氨水为沉淀剂,以水解沉淀法制备纳米TiO_2-硅藻土复合材料;结合XRD、SEM、氮气吸-脱附表征手段,对比研究复合材料、纯TiO_2、纳米级TiO_2(P25)对罗丹明B的光催化性能以及复合材料对罗丹明B、刚果红、甲基橙、亚甲基蓝等染料的吸附及光催化降解性能。结果表明:纳米TiO_2-硅藻土复合材料对罗丹明B的光催化性能明显优于纯TiO_2和P25;复合材料对不同污染物的吸附及光催化性能存在显著差异,对阳离子型的亚甲基蓝的吸附及光催化性能最好,对阴离子型甲基橙的吸附及光催化性能最差。
The nano-sized TiO_2-diatomite composites was prepared by hydrolysis precipitation method using TiOSO_4 as titanium source and ammonia as precipitator. The prepared composites was characterized by XRD, SEM and N_2 adsorptiondesorption. The photocatalytic performances of nano-sized TiO_2-diatomite composites, pure TiO_2 and P25 were compared by the degradations of Rhodamine B. The adsorption and photocatalytic performances of the composites for Rhodamine B, Congo red,methyl orange and methylene blue were studied. The results show that the photocatalytic performance of nano-sized TiO_2-diatomite composites is obviously better than pure TiO_2 and P25 by using Rhodamine B as the targeted pollutant. The nano-sized TiO_2-diatomite composite shows different adsorption and photocatalytic activity for different dye pollutants. The prepared composites shows best adsorption and photocatalytic performance for degrading cationic methylene blue, and the worst performance for anionic methyl orange.
The nano-sized TiO_2-diatomite composites was prepared by hydrolysis precipitation method using TiOSO_4 as titanium source and ammonia as precipitator. The prepared composites was characterized by XRD, SEM and N_2 adsorptiondesorption. The photocatalytic performances of nano-sized TiO_2-diatomite composites, pure TiO_2 and P25 were compared by the degradations of Rhodamine B. The adsorption and photocatalytic performances of the composites for Rhodamine B, Congo red,methyl orange and methylene blue were studied. The results show that the photocatalytic performance of nano-sized TiO_2-diatomite composites is obviously better than pure TiO_2 and P25 by using Rhodamine B as the targeted pollutant. The nano-sized TiO_2-diatomite composite shows different adsorption and photocatalytic activity for different dye pollutants. The prepared composites shows best adsorption and photocatalytic performance for degrading cationic methylene blue, and the worst performance for anionic methyl orange.
引文
[1]FUJISHIMA A,HONDA K.Electrochemical photocatalysis of water at semiconductor electrode[J].Nature,1972,238(5358).
[2]CAREY J H,LAWRENCE J,TOSINE H M.Photodechlorination of PCB's in the presence of titanium dioxide in aqueous suspensions[J].Bulletin of Environmental Contamination&Toxicology,1976,16(6):697-701.
[3]晏太红,崔海霞,林志东,等.稀土掺杂Ti O2薄膜的制备及光催化特性[J].复旦学报(自然科学版),2003,422(6):999-1002.
[4]汪滨,郑水林,张广心.纳米Ti O2/非金属矿物复合光催化剂的研究进展[J].中国非金属矿工业导刊,2013(4):23-27.
[5]郑水林,孙志明,胡志波,等.中国硅藻土资源及加工利用现状与发展趋势[J].地学前缘,2014,21(5):274-280.
[6]张广心,董雄波,郑水林.纳米Ti O2-硅藻土复合材料光催化降解作用研究[J].无机材料学报,2016,31(4):407-412.
[7]LV K,YU J,DENG K,et al.Synergistic effects of hollow structure and surface fluorination on the photocatalytic activity of titania[J].Journal of Hazardous Materials,2010,173(1/2/3):539-543.
[8]HSIEH C,FAN W,CHEN W,et al.Adsorption and visible-lightderived photocatalytic kinetics of organic dye on Co-doped titania nanotubes prepared by hydrothermal synthesis[J].Separation and Purification Technology,2009,67(3):312-318.
[9]詹艳慧,林建伟.羟基磷灰石对水中刚果红的吸附作用研究[J].环境科学,2013,34(8):3143-3150.
[10]ZAINAL Z,HUI L K,HUSSEIN M Z,et al.Removal of dyes using immobilized titanium dioxide illuminated by fluorescent lamps[J].Journal of Hazardous Materials,2005,125(1/2/3):113-120.
[2]CAREY J H,LAWRENCE J,TOSINE H M.Photodechlorination of PCB's in the presence of titanium dioxide in aqueous suspensions[J].Bulletin of Environmental Contamination&Toxicology,1976,16(6):697-701.
[3]晏太红,崔海霞,林志东,等.稀土掺杂Ti O2薄膜的制备及光催化特性[J].复旦学报(自然科学版),2003,422(6):999-1002.
[4]汪滨,郑水林,张广心.纳米Ti O2/非金属矿物复合光催化剂的研究进展[J].中国非金属矿工业导刊,2013(4):23-27.
[5]郑水林,孙志明,胡志波,等.中国硅藻土资源及加工利用现状与发展趋势[J].地学前缘,2014,21(5):274-280.
[6]张广心,董雄波,郑水林.纳米Ti O2-硅藻土复合材料光催化降解作用研究[J].无机材料学报,2016,31(4):407-412.
[7]LV K,YU J,DENG K,et al.Synergistic effects of hollow structure and surface fluorination on the photocatalytic activity of titania[J].Journal of Hazardous Materials,2010,173(1/2/3):539-543.
[8]HSIEH C,FAN W,CHEN W,et al.Adsorption and visible-lightderived photocatalytic kinetics of organic dye on Co-doped titania nanotubes prepared by hydrothermal synthesis[J].Separation and Purification Technology,2009,67(3):312-318.
[9]詹艳慧,林建伟.羟基磷灰石对水中刚果红的吸附作用研究[J].环境科学,2013,34(8):3143-3150.
[10]ZAINAL Z,HUI L K,HUSSEIN M Z,et al.Removal of dyes using immobilized titanium dioxide illuminated by fluorescent lamps[J].Journal of Hazardous Materials,2005,125(1/2/3):113-120.