氮/铈/TiO_2复合光催化剂制备及其工艺优化
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摘要
通过溶胶凝胶法,以二乙胺为氮源,硝酸铈为铈源,制备氮/铈共掺杂的TiO_2光催化剂。通过X射线衍射(XRD)、UV-可见漫反射光谱(UV-Vis DRS)对样品进行表征。结果表明制备的N/Ce/TiO_2光催化剂比TiO_2具有较好的催化活性,可更好地应用于铝材加工的废水处理中。采用正交法对N/Ce/TiO_2催化罗丹明B进行工艺优化,最佳反应工艺为:反应温度45°C、罗丹明B初始浓度20 mg/L、催化剂用量20 mg、时间240 min。
N and Ce Co-doped TiO_2 nanocatalysts were successfully synthesized through a sol-gel method by using diethylamine as nitrogen source and Cerium nitrate hexahydrate as the precursors. The products were characterized by X-ray diffraction(XRD) and UV-vis diffuse reflectance spectroscopy(UV-Vis DRS).The results showed that the N/Ce/TiO_2 showed higher catalytic activity than TiO_2. Meanwhile, the orthogonal test was used to optimize the photocatalysis process. The optimum condition is reaction temperature of 45°C, the initial concentration of Rhodamine B20 mg/L, catalyst amount 20 mg, reaction time 240 min.
N and Ce Co-doped TiO_2 nanocatalysts were successfully synthesized through a sol-gel method by using diethylamine as nitrogen source and Cerium nitrate hexahydrate as the precursors. The products were characterized by X-ray diffraction(XRD) and UV-vis diffuse reflectance spectroscopy(UV-Vis DRS).The results showed that the N/Ce/TiO_2 showed higher catalytic activity than TiO_2. Meanwhile, the orthogonal test was used to optimize the photocatalysis process. The optimum condition is reaction temperature of 45°C, the initial concentration of Rhodamine B20 mg/L, catalyst amount 20 mg, reaction time 240 min.
引文
[1]Kubacka A,Fernández-García M,Colón G.Advanced nanoarchitectures for solar photocatalytic applications[J].Chemical Reviews,2012,112(3):1555-1614
[2]杨岳,关成立.光催化剂TiO2的改性研究进展[J].化工技术与开发,2012,41(8):32-34
[3]SUN Q,LI H,ZHENG S L.Characterizations of nanoTiO2/diatomite composites and their photocatalytic reduction of aqueous Cr(VI)[J].Applied Surface Science,2014,311:369-376
[4]周武艺,曹庆云.硫掺杂纳米TiO2的掺杂机理及可见光催化活性的研究[J].无机材料学报,2006,21(4):776-782
[5]YIN Y S,ZHANG W W,CHENn S G,et al.Theoretical and experimental study on the electronic structure and optical absorption properties of nitrogen-doped nanometer TiO2[J].Materials Chemistry and Physics,2009(113):982-985
[6]WANG Y J,LU K C,FENG C G.Photocatalytic degradation of methyl orange by polyoxometalates supported on yttrium-doped TiO2[J].Journal of Rare Earths,2011(29):866-871
[7]Khan M,CAO W.Preparation of Y-doped TiO2by hydrothermal method and investigation of its visible light photocatalytic activity by the degradation of methylene blue[J].Journal of Molecular Catalysis A-Chemical,2013(376):71-77
[8]ZHANG H R,TAN K Q,ZHENG H W,et al.Preparation,characterization and photocatalytic activity of TiO2codoped with yttrium and nitrogen[J].Materials Chemistry and Physics,2011(125):156-160
[9]WANG Y.Y.,ZHOU G.W.,Li T.D.,et al.Catalytic activity of mesoporous TiO2-xNx photocatalysts for the decomposition of methyl orange under solar simulated light[J].Catalysis Communications,2009,10:412-415
[10]姚淑华,陈爽,邹沛宸,等.磷钨酸掺杂二氧化钛光催化剂的吸附性能及光催化活性[J].化工学报,2015,66(9):3456-3461
[11]YAN P P,JIANG H Q,ZANG S Y,et al.Sol-solvothermal preparation and characterization of(Yb,N)-codoped anatase-TiO2nano-photocatalyst with high visible light activity[J].Materials Chemistry and Physics,2013,139:1014-1022
[2]杨岳,关成立.光催化剂TiO2的改性研究进展[J].化工技术与开发,2012,41(8):32-34
[3]SUN Q,LI H,ZHENG S L.Characterizations of nanoTiO2/diatomite composites and their photocatalytic reduction of aqueous Cr(VI)[J].Applied Surface Science,2014,311:369-376
[4]周武艺,曹庆云.硫掺杂纳米TiO2的掺杂机理及可见光催化活性的研究[J].无机材料学报,2006,21(4):776-782
[5]YIN Y S,ZHANG W W,CHENn S G,et al.Theoretical and experimental study on the electronic structure and optical absorption properties of nitrogen-doped nanometer TiO2[J].Materials Chemistry and Physics,2009(113):982-985
[6]WANG Y J,LU K C,FENG C G.Photocatalytic degradation of methyl orange by polyoxometalates supported on yttrium-doped TiO2[J].Journal of Rare Earths,2011(29):866-871
[7]Khan M,CAO W.Preparation of Y-doped TiO2by hydrothermal method and investigation of its visible light photocatalytic activity by the degradation of methylene blue[J].Journal of Molecular Catalysis A-Chemical,2013(376):71-77
[8]ZHANG H R,TAN K Q,ZHENG H W,et al.Preparation,characterization and photocatalytic activity of TiO2codoped with yttrium and nitrogen[J].Materials Chemistry and Physics,2011(125):156-160
[9]WANG Y.Y.,ZHOU G.W.,Li T.D.,et al.Catalytic activity of mesoporous TiO2-xNx photocatalysts for the decomposition of methyl orange under solar simulated light[J].Catalysis Communications,2009,10:412-415
[10]姚淑华,陈爽,邹沛宸,等.磷钨酸掺杂二氧化钛光催化剂的吸附性能及光催化活性[J].化工学报,2015,66(9):3456-3461
[11]YAN P P,JIANG H Q,ZANG S Y,et al.Sol-solvothermal preparation and characterization of(Yb,N)-codoped anatase-TiO2nano-photocatalyst with high visible light activity[J].Materials Chemistry and Physics,2013,139:1014-1022