Li_2CO_3-Y~(3+)共掺杂TiO_2纳米材料的制备及光催化性能的研究
|
摘要
采用溶胶-凝胶法制备了Y~(3+)-TiO_2纳米粒子,利用X-射线衍射仪(XRD)、扫描电镜(SEM)、紫外-可见光谱(UVvis)等仪器对样品的物化性质进行了表征。以对亚甲基蓝为目标降解物,考查了Y~(3+)掺杂对纳米TiO_2光催化活性的影响。实验结果表明,掺杂浓度摩尔比为0. 03的Y~(3+)有利于提升TiO_2光催化活性,能有效提高对亚甲基蓝的光催化降解效率。对TiO_2纳米粒子进行了Y~(3+)和Li_2CO_3共掺杂,Li_2CO_3共掺Y~(3+)-TiO_2相比于Y~(3+)-TiO_2对亚甲基蓝的光催化降解效率有了进一步的提升,同时对相关机理进行了详细的论证,推测Li_2CO_3在本研究中起到空穴补偿剂而不是电荷补偿剂的作用。
Y~(3+)-TiO_2 nanoparticles were prepared by sol-gel method. The physicochemical properties of the samples were characterized by X-ray diffractometer( XRD),scanning electron microscope( SEM) and ultraviolet visible spectroscopy( UVvis). The effect of Y~(3+) doping on photocatalytic activity of TiO_2 nanomaterials was investigated with methylene blue as the target degradation product. Qualitative analyses indicate that Y~(3+) doped TiO_2 with the content of 0. 03 molar can effectively improve the photocatalytic degradation efficiency of methylene blue. In addition,the photocatalytic degradation efficiency of methylene blue was further improved by Li_2CO_3-Y~(3+) co-doping TiO_2 nanomaterials. Furthermore,the related mechanism was discussed in detail. It was speculated that Li_2CO_3 played a role of hole compensator rather than charge compensator in this study.
Y~(3+)-TiO_2 nanoparticles were prepared by sol-gel method. The physicochemical properties of the samples were characterized by X-ray diffractometer( XRD),scanning electron microscope( SEM) and ultraviolet visible spectroscopy( UVvis). The effect of Y~(3+) doping on photocatalytic activity of TiO_2 nanomaterials was investigated with methylene blue as the target degradation product. Qualitative analyses indicate that Y~(3+) doped TiO_2 with the content of 0. 03 molar can effectively improve the photocatalytic degradation efficiency of methylene blue. In addition,the photocatalytic degradation efficiency of methylene blue was further improved by Li_2CO_3-Y~(3+) co-doping TiO_2 nanomaterials. Furthermore,the related mechanism was discussed in detail. It was speculated that Li_2CO_3 played a role of hole compensator rather than charge compensator in this study.
引文
[1]凯玲,胡蕾,叶芝祥,等.泡沫镍负载La3+-TiO2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] Chen X B,Mao S S. Titanium dioxide nanomaterials:synthesis,properties,modifications and applicationgs[J]. Chemical Reviews.. 2007,107(7):2891-2959.
[4] Devi L G,Nagaraj B,Rajashekhar K E. Synergistic effect of Ag deposition and nitrogen doping in TiO2for the degradation of phenol under solar irradiation in presence of electron acceptor[J]. Chemical Engineering Journal.,2012,181(1):259-266.
[5] Hammer N,Kvande I,Xu X,et al. Au-TiO2 Catalyst on carbon nanofibres prepared by deposition-precipitation and from colloid solutions[J].Catalysis Today.,2007,123(1):245-256.
[6]钟超阳,潘海波,郭先发,等.四磺基酞菁锌敏化TiO2的原位自组装合成及可见光光催化[J].光谱学与光谱分析,2007,27(11):2329-2332.
[7] Xu Y H,Zeng Z X. The preparation,characterization,and photocatalytic activities of Ce-TiO2/Si O2[J]. Journal of Molecular Catalysis A:Chemical.,2008,279(1/2):77-81.
[8] Zeng Q G,Le T,Zou H,et al. Temperature effect on the structure and optical properties of Eu/TiO2nanomaterials[J]. Chin. J. Lumin.,2011,32(4):358-362.
[9] Shi W J,Zheng J T,et al. Influence of Ho doping on the crystal structure and photocatalytic activity of TiO2[J]. J. Chin. Ceram. Soc. 2007,35(2):182-186.
[10] Jiang X L,Ji Y C,Fan Y H,et al. Preparation and visible-light photocatalysis property of yttrium-doped ordered porous TiO2thin films[J]. J.Chin. Ceram. Soc. 2012,40(4):555-561.
[11] R. D. Shannon. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides[J]. Acta Cryst..1976,A32:751-767.
[12] Xin S Y,Zhou F G,et al. Synthesis,luminescence property and thermal quenching investigation of niobate phosphors Ba3Zr Nb4O15:Eu3+under multiple excitations[J]. Journal of Solid State Science and Technology. 2018,7(6):R94-R98.
[13]李莎莎,刘勇,王红艳,等.钴掺杂改性TiO2的制备及其光催化性能研究[J].化工新型材料,2016,44(9):159-161.
[14] Lin X,Fei R,Xiang J,et al. Carbon-doped mesoporous TiO2film and its photocatalytic activity[J]. Microporous&Mesoporous Materials,2011,142(1):276-281.
[15]张美红,丁士文,王振兴,等.化学自组装合成Sn掺杂的纳米TiO2介孔材料及其光催化性能[J].中国科学B辑:化学,2005,35(3):206-211.
[16] Ganesh I,Gupta A K,Kumar P P,et al. Preparation and characterization of Co-doped TiO2materials for solar light induced current and photocatalytic applications[J]. Materials Chemistry and Physics,2012,135(1):220-234.
[17] Han C,Pelaez M,Likodimous V,et al. Innovative visible light-activated sulfur doped TiO2films for water treatment[J]. Applied Catalysis B:Environmental,2011,107(1/2):77-87.
[18]张文保,崔玉民.金属离子掺杂对TiO2光催化活性的影响综述[J].稀土,2008,29(5):80-84.
[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] Chen X B,Mao S S. Titanium dioxide nanomaterials:synthesis,properties,modifications and applicationgs[J]. Chemical Reviews.. 2007,107(7):2891-2959.
[4] Devi L G,Nagaraj B,Rajashekhar K E. Synergistic effect of Ag deposition and nitrogen doping in TiO2for the degradation of phenol under solar irradiation in presence of electron acceptor[J]. Chemical Engineering Journal.,2012,181(1):259-266.
[5] Hammer N,Kvande I,Xu X,et al. Au-TiO2 Catalyst on carbon nanofibres prepared by deposition-precipitation and from colloid solutions[J].Catalysis Today.,2007,123(1):245-256.
[6]钟超阳,潘海波,郭先发,等.四磺基酞菁锌敏化TiO2的原位自组装合成及可见光光催化[J].光谱学与光谱分析,2007,27(11):2329-2332.
[7] Xu Y H,Zeng Z X. The preparation,characterization,and photocatalytic activities of Ce-TiO2/Si O2[J]. Journal of Molecular Catalysis A:Chemical.,2008,279(1/2):77-81.
[8] Zeng Q G,Le T,Zou H,et al. Temperature effect on the structure and optical properties of Eu/TiO2nanomaterials[J]. Chin. J. Lumin.,2011,32(4):358-362.
[9] Shi W J,Zheng J T,et al. Influence of Ho doping on the crystal structure and photocatalytic activity of TiO2[J]. J. Chin. Ceram. Soc. 2007,35(2):182-186.
[10] Jiang X L,Ji Y C,Fan Y H,et al. Preparation and visible-light photocatalysis property of yttrium-doped ordered porous TiO2thin films[J]. J.Chin. Ceram. Soc. 2012,40(4):555-561.
[11] R. D. Shannon. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides[J]. Acta Cryst..1976,A32:751-767.
[12] Xin S Y,Zhou F G,et al. Synthesis,luminescence property and thermal quenching investigation of niobate phosphors Ba3Zr Nb4O15:Eu3+under multiple excitations[J]. Journal of Solid State Science and Technology. 2018,7(6):R94-R98.
[13]李莎莎,刘勇,王红艳,等.钴掺杂改性TiO2的制备及其光催化性能研究[J].化工新型材料,2016,44(9):159-161.
[14] Lin X,Fei R,Xiang J,et al. Carbon-doped mesoporous TiO2film and its photocatalytic activity[J]. Microporous&Mesoporous Materials,2011,142(1):276-281.
[15]张美红,丁士文,王振兴,等.化学自组装合成Sn掺杂的纳米TiO2介孔材料及其光催化性能[J].中国科学B辑:化学,2005,35(3):206-211.
[16] Ganesh I,Gupta A K,Kumar P P,et al. Preparation and characterization of Co-doped TiO2materials for solar light induced current and photocatalytic applications[J]. Materials Chemistry and Physics,2012,135(1):220-234.
[17] Han C,Pelaez M,Likodimous V,et al. Innovative visible light-activated sulfur doped TiO2films for water treatment[J]. Applied Catalysis B:Environmental,2011,107(1/2):77-87.
[18]张文保,崔玉民.金属离子掺杂对TiO2光催化活性的影响综述[J].稀土,2008,29(5):80-84.