Er~(3+)-TiO_2催化剂的制备及光催化性能的研究
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摘要
本实验使用溶胶-凝胶法制得Er~(3+)-TiO_2(铒掺杂二氧化钛)催化剂,以罗丹明B为目标污染物,采用太阳光作为光源,探究在不相同制备条件和降解条件下催化剂的光催化性能。实验结果证明:最佳制备条件为铒钛比(摩尔百分比)1.00%、焙烧温度600℃;当催化剂投加量为0.2 g、降解100 m L、20 mg/L的罗丹明B、p H=7时,降解效果最好。最佳条件下光催化反应2.5 h后降解效果可达到95%以上,其降解效果是纯TiO_2催化剂降解效果的5倍,是N-TiO_2(氮掺杂二氧化钛)催化剂降解效果的3.5倍,且Er~(3+)-TiO_2催化剂的催化性能稳定,重复利用性好。
The Er~(3+)-doped TiO_2(Er~(3+)-TiO_2) was prepared by sol-gel method, with rhodamine B as the target pollutant, with sunlight as the light source under different preparation conditions and degradation conditions were studied.The experimental results show that:Under the optimum preparation conditions of erbium doping amount(the molar ratio of erbium and titanium)was 1.00 %, the calcination temperature was 600 ℃.When the dosage of catalyst was 0.2 g, p H=7, the degradation effect was the best to degrade 100 m L 20 mg/L of rhodamine B solution.Under the optimum conditions, the degradation efficiency can reach above 95 %after 2.5h, which was 5 times as much as the pure TiO_2 catalyst,3.5 times as much as N-TiO_2(nitrogen doped titanium) dioxide catalyst and the catalytic performance of Er~(3+)-TiO_2 catalyst was stable and has good reusability.
The Er~(3+)-doped TiO_2(Er~(3+)-TiO_2) was prepared by sol-gel method, with rhodamine B as the target pollutant, with sunlight as the light source under different preparation conditions and degradation conditions were studied.The experimental results show that:Under the optimum preparation conditions of erbium doping amount(the molar ratio of erbium and titanium)was 1.00 %, the calcination temperature was 600 ℃.When the dosage of catalyst was 0.2 g, p H=7, the degradation effect was the best to degrade 100 m L 20 mg/L of rhodamine B solution.Under the optimum conditions, the degradation efficiency can reach above 95 %after 2.5h, which was 5 times as much as the pure TiO_2 catalyst,3.5 times as much as N-TiO_2(nitrogen doped titanium) dioxide catalyst and the catalytic performance of Er~(3+)-TiO_2 catalyst was stable and has good reusability.
引文
[1]凯玲,胡蕾,叶芝祥,等.泡沫镍负载La3+-Ti O2催化剂对苯的可见光降解[J].化工环保,2014,34(3):291-295.
[2]尹荔松,沈辉.二氧化钛光催化研究进展及应用[J].材料导报,2000,14(12):23-25.
[3]SHI Zhongliang,ZHANG Xiaoyan,and YAO Shuhua School of Applied Chemistry,Shenyang University of Chemical Technology,Shenyang 110142,China.Synthesis and photocatalytic properties of lanthanum doped anatase Ti O2coated Fe3O4composites[J].Rare Metals,2011,(3).
[4]康巧梅,洪臣熙.La2O3-Ti O2的制备及其光催化性能[J].化工环保,2015,35(4):432-437.
[5]岳娜娜,王继库,孟宪辉,等.掺杂型纳米二氧化钛光催化剂的制备[J].化学工程与装备,2013,(6):1-2.
[6]王茹,徐悦华,陈明洁,等.铒掺杂对玻璃表面Ti O2薄膜光催化性能的影响[J].中国有色金属学报,2009,19(10):1867-1871.
[7]孙秀云,王连军,徐林,等.纳米二氧化钛光催化降解斯蒂酚酸影响因素的研究[J].环境工程,2003,21(3):76-78.
[8]杨合,薛向欣,赵娜,等.半导体多相光催化技术研究进展[J].环境保护,2003,6:22-23.
[9]柴瑜超,林琳,赵斌,等.稀土掺杂二氧化钛光催化剂的研究进展[J].材料导报,2013,27(1):38-43.
[2]尹荔松,沈辉.二氧化钛光催化研究进展及应用[J].材料导报,2000,14(12):23-25.
[3]SHI Zhongliang,ZHANG Xiaoyan,and YAO Shuhua School of Applied Chemistry,Shenyang University of Chemical Technology,Shenyang 110142,China.Synthesis and photocatalytic properties of lanthanum doped anatase Ti O2coated Fe3O4composites[J].Rare Metals,2011,(3).
[4]康巧梅,洪臣熙.La2O3-Ti O2的制备及其光催化性能[J].化工环保,2015,35(4):432-437.
[5]岳娜娜,王继库,孟宪辉,等.掺杂型纳米二氧化钛光催化剂的制备[J].化学工程与装备,2013,(6):1-2.
[6]王茹,徐悦华,陈明洁,等.铒掺杂对玻璃表面Ti O2薄膜光催化性能的影响[J].中国有色金属学报,2009,19(10):1867-1871.
[7]孙秀云,王连军,徐林,等.纳米二氧化钛光催化降解斯蒂酚酸影响因素的研究[J].环境工程,2003,21(3):76-78.
[8]杨合,薛向欣,赵娜,等.半导体多相光催化技术研究进展[J].环境保护,2003,6:22-23.
[9]柴瑜超,林琳,赵斌,等.稀土掺杂二氧化钛光催化剂的研究进展[J].材料导报,2013,27(1):38-43.