溶胶-凝胶法制备Eu~(3+)-Ce~(3+)共掺杂TiO_2及光催化性能

详细信息    查看官网全文

• 英文论文题名：Photocatalytic properties of Eu~(3+)-Ce~(3+) co-doped TiO_2 nanoparticle by sol-gel method
• 论文作者：徐晓虹 ; 叶芬 ; 吴建锋 ; 宋佳 ; 张乾坤 ; 王东斌
• 英文论文作者：XU Xaohong ; YE Fen ; WU Jianfrng ; SONG Jia ; ZHANG Qiankun ; WANG Dongbin ; School of Materials Science and Engineering ; Wuhan University of Technology
• 年：2016
• 作者机构：武汉理工大学材料科学与工程学院;
• 论文关键词：溶胶-凝胶法 ; Eu~(3+)-Ce~(3+)共掺 ; 光催化性 ; TiO_2纳米粉体 ; 亚甲基蓝 ; 正交试验
• 英文论文关键词：sol-gel method ; Eu~(3+)-Ce~(3+) co-doped ; photocatalytic degradation ; TiO_2 nanapaticles ; methyl blue degradation ; orthogonal test
• 会议召开时间：2016-11-05
• 会议录名称：2016中国硅酸盐学会陶瓷分会学术年会会刊
• 语种：中文
• 分类号：O643.36;X703
• 学会代码：EUGQ
• 会议名称：2016中国硅酸盐学会陶瓷分会学术年会
• 会议地点：中国辽宁沈阳
• 主办单位：中国硅酸盐学会陶瓷分会、辽宁省沈阳市法库县政府、辽宁省轻工科学研究院
• 学会名称：中国硅酸盐学会
• 页数：12
• 文件大小：1208k
• 原文格式：O
• 会议级别：全国

摘要

采用溶胶-凝胶法制备了Eu~(3+)-Ce~(3+)共掺杂TiO_2纳米粉体,以亚甲基蓝溶液为目标降解物、用正交试验方法考察了内部因素和外部因素对掺杂样品的光吸收和光催化性能的影响,同时采用XRD、FE-SEM、UV-Vis吸收谱等表征了样品结构与性能。结果表明最佳的实验方案为热处理温度为550℃、Ce~(3+)的掺杂量为0.02mo1%、Eu~(3+)的掺杂量为0.2mo1%,最佳的外部环境为共掺杂TiO_2纳米粉体光催化剂加入量为0.15g/50mL、亚甲基蓝溶液的初始pH值及浓度分别为6.5和10 mg/L。样品的晶粒尺寸在20nm左右,共掺样品的光催化率明显比单掺和未掺样品的高,且吸收边向可见光红移了53nm左右。共掺样品对亚甲基蓝降解反应符合一级动力学模式。共掺样品光催化率的提高归因于Eu~(3+)和Ce~(3+)的协同作用,一方面增加有效的空穴电子数,另一方面可使样品吸收更低能量的波长而被激发。
Nano-TiO_2 co-doped with Eu~(3+)-Ce~(3+) was prepared by sol-gel method and the photocatalystic activity under ultra-violet light was evaluated by photocatalytic degradation of methyl blue.The microstructure and performance were characterized by tesing techniques such as XRD,FE-SEM,UV-Vis.The result of internal and external factor influence co-doped samples' photoabsorption and photocatalytic properties by orthogonal test.The results show that the optimal formula of the sample is that the amount of Ce~(3+)and Eu~(3+) is 0.02mol%and 0.02mof%respectively,heating temperature is at 550℃,the average size is20 nm.The optimal addition amount is 0.15g/50 mL,the initial concentration is 10mg/L and the pH value is6.5 The photocatalysis rate of co-doped samples was better than no doped and pure samples.The co-doped samples cause the red-shift(53nm)of the optical absorption edge,and its UV-Vis light absorption increase.The co-doped photocatalyst on methyl blue degradation coincide first order dynamic equation.The reasons for photocatalysis rate raise were the increase of effective electron and hole,also made the sample be excited by wavelength with lower energy.

引文

[1]吕英英,顾晓天,周家宏,等.N、S共掺杂型二氧化钛光催化降解有机污染物的性能研究[J].南京师大学报(自然科学版),2008,31(4):69-73
    [2]杨国营.光催化氧化法处理污水的研究[J].河北化工,2002,(1):11~12
    [3]Youngmin Cho,Hyunsook Kyung,Wonyong Choi.Visible light activity of TiO_2 for the photoreduction of CCl_4 and Cr(Ⅵ)in the presence of nonionic surfactant.Applied Catalysis B:Environmental,2004,52:23~32
    [4]徐晓虹,田越,吴建锋,等.稀土复合掺杂纳米TiO_2薄膜光催化活性的研究[J].武汉理工大学,2009,31(11):36~40
    [5]李振宏,伍虹.我国稀土应用的现状与前景[J].稀土,1996,17(6):48
    [6]北京大学数学力学概率统计组.正交设计法.北京:石油化学工业出版社,1976:3~10
    [7]彭海滨.正交试验设计与数据分析方法.计量与测试技术,2009,36(12):38~40
    [8]李雁,易永胜,高全,等.高性能化海砂混凝土配合比设计的正交试验研究.建筑技术,201o,41(2);162~164
    [9]吴翊,李永乐,胡庆军,等.应用数理统计.长沙:国防科技大学出版社,2005:405~414
    [10]魏亚光,施朝淑,戚泽明,等.Gd_2O_3:(Ce~(3+),Eu~(3+))微晶中稀土离子间的级联能量传递.发光学报,2001,22(3):243~247
    [11]陈俊涛,李新军,杨莹,等.稀土元素掺杂对TiO_2薄膜光催化性能的影响.中国稀土学报,2003,21(12):67~71
    [12]张献明,苏海全,叶泽人,等.BaY_2F_8:Ce,Eu中Ce~(3+)→Eu~(2+)的能量传递和Ce~(3+)→Eu~(3+)的电子转移.高等学校化学学报,2001,22(3):358~361