Gd掺杂和Gd/N共掺杂TiO_2光催化剂的制备及其光催化性能研究
|
摘要
采用溶胶凝胶法分别制备Gd掺杂和Gd/N共掺杂纳米TiO_2光催化剂,用XRD、TEM、SEM等手段表征TiO_2光催化剂的形貌组织,用UV-Vis DRS、PL测试其光学性能。研究Gd掺杂量和Gd/N共掺杂量分别对二氧化钛在紫外和可见光下降解甲基橙性能的影响并分析其机理。结果表明:1.5%Gd掺杂TiO_2经7.6h紫外线照射下对甲基橙降解率达到100%,0.5%Gd、8.0%N共掺杂的TiO_2经7.6h可见光照射下对甲基橙降解率达到68.4%。
Gd-doped and Gd/N-codoped nano TiO_2 photocatalysts were prepared by sol-gel method.The morphology and microstructure of TiO_2 photocatalyst were characterized by XRD,TEM andEDS.The optical properties were tested by UV-Vis DRS and PL.Influence of Gd and Gd-N doping on the TiO_2 performance degradation of methyl orange under uv light and visible light was studied and its mechanism was studied.The results showed that 1.5% Gd-doped TiO_2 for 7.6hunder uv light could degrade 100%of methyl orange;8.0%Gd-0.5% N doped TiO_2 for 7.6hunder visible light irradiation could degrade68.4% of methyl orange.
Gd-doped and Gd/N-codoped nano TiO_2 photocatalysts were prepared by sol-gel method.The morphology and microstructure of TiO_2 photocatalyst were characterized by XRD,TEM andEDS.The optical properties were tested by UV-Vis DRS and PL.Influence of Gd and Gd-N doping on the TiO_2 performance degradation of methyl orange under uv light and visible light was studied and its mechanism was studied.The results showed that 1.5% Gd-doped TiO_2 for 7.6hunder uv light could degrade 100%of methyl orange;8.0%Gd-0.5% N doped TiO_2 for 7.6hunder visible light irradiation could degrade68.4% of methyl orange.
引文
[1]何东林,黄洪,钟理.TiO2可见光催化研究进展及其应用前景[J].化工进展,2015(A01):104-109.
[2]王城英,姜洪泉,李井申,等.TiO2-yNx纳米光催化剂的制备及其可见光响应机理[J].应用化学,2010,27(12):1413-1418.
[3]LUO S,LIU S X.Preparation and characterization of gadolinium-doped TiO2/Activated carbon fibre composite[J].Chinese J Appl Chem,2011,28(1):66-71.
[4]EL-BAHY Z M,ISMAIL A A,MOHAMED R M.Enhancement of titania by doping rare earth for photodegradation of organic dye(Direct Blue)[J].J Hazard Mater,2009,166(1):138-143.
[5]ASAHI R,OHWAKI T,AOKI K,et al.Visible-light photocatalysis in nitrogen-doped titanium oxides[J].Science,2001,293(5528):269-271.
[6]石建稳,郑经堂,胡燕,等.La掺杂纳米TiO2的制备及光催化性能研究[J].工业催化,2007,15(1):52-53.
[7]于洋洋,于美燕,张钥,等.氮掺杂TiO2粉体的制备及掺杂机理研究[J].无机化学学报,2013,29(8):1657-1662.
[8]卢旭东,姜承志,苏会东.低量Gd3+掺杂TiO2粉体的制备及催化活性[J].环境科学与技术,2008,31(8):26-28,43.
[9]李凤丽,彭绍琴,李越湘.Gd3+掺杂纳米TiO2的制备及性能[J].有色金属,2007(3):41-45.
[10]曾爱香.酸对TiO2结构和光催化性能的影响[J].长沙理工大学学报,2014,11(1):88-92.
[11]秦好丽,古国榜,柳松,等.溶胶凝胶法制备氮掺杂二氧化钛及其可见光活性的研究[J].太阳能学报,2007,28(4):363-367.
[12]秦好丽,古国榜,柳松,等.尿素为氮源制备氮掺杂二氧化钛及其光催化性[J].华南理工大学学报(自然科学版),2006,34(12):78-82.
[2]王城英,姜洪泉,李井申,等.TiO2-yNx纳米光催化剂的制备及其可见光响应机理[J].应用化学,2010,27(12):1413-1418.
[3]LUO S,LIU S X.Preparation and characterization of gadolinium-doped TiO2/Activated carbon fibre composite[J].Chinese J Appl Chem,2011,28(1):66-71.
[4]EL-BAHY Z M,ISMAIL A A,MOHAMED R M.Enhancement of titania by doping rare earth for photodegradation of organic dye(Direct Blue)[J].J Hazard Mater,2009,166(1):138-143.
[5]ASAHI R,OHWAKI T,AOKI K,et al.Visible-light photocatalysis in nitrogen-doped titanium oxides[J].Science,2001,293(5528):269-271.
[6]石建稳,郑经堂,胡燕,等.La掺杂纳米TiO2的制备及光催化性能研究[J].工业催化,2007,15(1):52-53.
[7]于洋洋,于美燕,张钥,等.氮掺杂TiO2粉体的制备及掺杂机理研究[J].无机化学学报,2013,29(8):1657-1662.
[8]卢旭东,姜承志,苏会东.低量Gd3+掺杂TiO2粉体的制备及催化活性[J].环境科学与技术,2008,31(8):26-28,43.
[9]李凤丽,彭绍琴,李越湘.Gd3+掺杂纳米TiO2的制备及性能[J].有色金属,2007(3):41-45.
[10]曾爱香.酸对TiO2结构和光催化性能的影响[J].长沙理工大学学报,2014,11(1):88-92.
[11]秦好丽,古国榜,柳松,等.溶胶凝胶法制备氮掺杂二氧化钛及其可见光活性的研究[J].太阳能学报,2007,28(4):363-367.
[12]秦好丽,古国榜,柳松,等.尿素为氮源制备氮掺杂二氧化钛及其光催化性[J].华南理工大学学报(自然科学版),2006,34(12):78-82.