新型光催化纳米材料Nd-TiO_2-SBA-15的制备及应用
|
摘要
采用溶胶-凝胶法,将纳米TiO_2负载到介孔分子筛SBA-15上,得到纳米材料TiO_2-SBA-15;将其浸渍于硝酸钕溶液中,煅烧后得到新型光催化剂Nd-TiO_2-SBA-15.采用XRD,FT-IR,EDS,TEM等手段进行表征,以结晶紫溶液作为目标降解物进行光催化实验.结果表明,相比于其它金属掺杂量催化剂,光催化剂0.4%的Nd-TiO_2-SBA-15降解效率较高,在氙灯300 W,光催化剂用量为15 mg,初始浓度为10 mg/L时,p H=8的条件下,光催化剂降解率达91.8%.
Nano-TiO_2 was loaded onto mesoporous molecular sieve SBA-15 by sol-gel method to obtain nano-material TiO_2-SBA-15.Then it was immersed in cerium nitrate solution,and calcined to obtain new photocatalyst Nd-TiO_2-SBA-15.XRD,FT-IR,EDS and TEM were used to characterize the photocatalytic experiments with crystal violet solution as the target degradation product.The results show that the photocatalyst 0.4% Nd-TiO_2-SBA-15 has higher degradation efficiency than other metal doping catalysts.When the xenon lamp is used for 300 W,the photocatalyst is 15 mg and the initial concentration is 10 mg/L,under the condition of pH=8,the photocatalyst degradation rate reached 91.8%.
Nano-TiO_2 was loaded onto mesoporous molecular sieve SBA-15 by sol-gel method to obtain nano-material TiO_2-SBA-15.Then it was immersed in cerium nitrate solution,and calcined to obtain new photocatalyst Nd-TiO_2-SBA-15.XRD,FT-IR,EDS and TEM were used to characterize the photocatalytic experiments with crystal violet solution as the target degradation product.The results show that the photocatalyst 0.4% Nd-TiO_2-SBA-15 has higher degradation efficiency than other metal doping catalysts.When the xenon lamp is used for 300 W,the photocatalyst is 15 mg and the initial concentration is 10 mg/L,under the condition of pH=8,the photocatalyst degradation rate reached 91.8%.
引文
[1]吕鲲,张庆竹.纳米二氧化钛光催化技术与大气污染治理[J].中国环境科学,2018,38(3):852-861
[2]杨文婷.纳米氧化锌在水处理方面的研究[J].化工技术与开发,2018(2):36-40
[3]杨帆.光催化处理技术研究进展[J].环境研究与监测,2017(2):40-44
[4]周振,姚吉伦,刘波,等.Ti O2光催化水处理技术研究进展[J].化学与生物工程,2017,34(4):1-5
[5]曹军骥,黄宇.纳米光催化技术在大气污染治理中的应用[J].科技导报,2016,34(17):64-71
[6]Fujishima A,Honda K.Electrochemical photolysis of water at a semiconductor electrode[J].Nature,1972,238(5358):37-38
[7]Ii M G S,Dalida M L,Khemthong P,et al.Photocatalytic degradation of paraquat using nano-sized Cu-TiO2/SBA-15 under UVand visible light[J].环境科学学报:英文版,2012,24(6):1125-1132
[8]Binas V D,Sambani K,Maggos T,et al.Synthesis and photocatalytic activity of Mn-doped TiO2,nanostructured powders underUV and visible light[J].Applied Catalysis B Environmental,2012,113-114(1):79-86
[9]宋兵,郑水林,李慧,等.Cu离子掺杂Ti O2光催化材料的研究进展[J].硅酸盐通报,2013,32(11):2259-2262
[10]Li Y J,Chen W,Li L Y,et al.Photocatalytic Degradation of Methylene Blue Using Immobilized Nanoparticles of TiO2 Supportedby SBA-15 Surface[J].Advanced Materials Research,2010,146-147:1801-1805
[11]高航,高梅,李松田,等.稀土金属Dy掺杂Ti O2光催化剂的制备及其对孔雀石绿降解性能的研究[J].应用化工,2015(10):1889-1891
[12]吴迪,李晨,史载锋,等.稀土金属掺杂Ti O2光催化剂及活性预测的研究进展[J].海南师范大学学报:自然科学版,2017(3):317-323
[13]Nghia N V,Vinh H X,Trung N T,et al.Synthesis and characterisation of nanostructured TiO2/SBA-15 and Ag-TiO2/SBA-15mesoporous composites[J].International Journal of Nanotechnology,2015,12(5/6/7):475
[2]杨文婷.纳米氧化锌在水处理方面的研究[J].化工技术与开发,2018(2):36-40
[3]杨帆.光催化处理技术研究进展[J].环境研究与监测,2017(2):40-44
[4]周振,姚吉伦,刘波,等.Ti O2光催化水处理技术研究进展[J].化学与生物工程,2017,34(4):1-5
[5]曹军骥,黄宇.纳米光催化技术在大气污染治理中的应用[J].科技导报,2016,34(17):64-71
[6]Fujishima A,Honda K.Electrochemical photolysis of water at a semiconductor electrode[J].Nature,1972,238(5358):37-38
[7]Ii M G S,Dalida M L,Khemthong P,et al.Photocatalytic degradation of paraquat using nano-sized Cu-TiO2/SBA-15 under UVand visible light[J].环境科学学报:英文版,2012,24(6):1125-1132
[8]Binas V D,Sambani K,Maggos T,et al.Synthesis and photocatalytic activity of Mn-doped TiO2,nanostructured powders underUV and visible light[J].Applied Catalysis B Environmental,2012,113-114(1):79-86
[9]宋兵,郑水林,李慧,等.Cu离子掺杂Ti O2光催化材料的研究进展[J].硅酸盐通报,2013,32(11):2259-2262
[10]Li Y J,Chen W,Li L Y,et al.Photocatalytic Degradation of Methylene Blue Using Immobilized Nanoparticles of TiO2 Supportedby SBA-15 Surface[J].Advanced Materials Research,2010,146-147:1801-1805
[11]高航,高梅,李松田,等.稀土金属Dy掺杂Ti O2光催化剂的制备及其对孔雀石绿降解性能的研究[J].应用化工,2015(10):1889-1891
[12]吴迪,李晨,史载锋,等.稀土金属掺杂Ti O2光催化剂及活性预测的研究进展[J].海南师范大学学报:自然科学版,2017(3):317-323
[13]Nghia N V,Vinh H X,Trung N T,et al.Synthesis and characterisation of nanostructured TiO2/SBA-15 and Ag-TiO2/SBA-15mesoporous composites[J].International Journal of Nanotechnology,2015,12(5/6/7):475