硅酸盐学报

Gd³⁺和Zn²⁺共掺杂二氧化钛介孔粉末的制备及光催化性能

作者：冀峰1 尚鹏博2 郑玉婴2

单位：1. 天津大学化工学院天津 300072 2. 福州大学材料科学与工程学院福州 350108

分类号：O643

出版年,卷(期):页码：2015,43(11):1636-1642

DOI：10.14062/j.issn.0454-5648.2015.11.18

摘要：

采用溶胶−凝胶法制备了Gd3+ 和Zn2+共掺杂TiO2 粉末。研究了Gd3+ 和Zn2+掺杂对样品的相组成、表面形貌和光催化活性的影响；以亚甲基蓝为目标降解物评价了其光催化活性。结果表明：制备的样品为锐钛矿相并具有良好的介孔结构。Gd3+和Zn2+在抑制光生电子与空穴的复合起到不同的作用，Gd3+起到光生电子陷阱的作用，Zn2+可以在起到光生空穴陷阱的作用，Gd3+和Zn2+共同作用可以显著降低电子和空穴的复合速率，进而增大TiO2 的光催化活性。当Gd3+的掺杂量为0.5%、Zn2+的掺杂量为0.3%时，TiO2 粉末的光催化活性最高，经过40 min 光催化降解亚甲基蓝溶液，降解率达到99.5%，比单掺杂0.5% Gd3+的TiO2 粉末降解率提高了11.5%，比单掺杂0.3% Zn2+的TiO2 粉末降解率提高了9.3%。

TiO2 powders co-doped with Gd3+ and Zn2+ were prepared by a sol–gel method. Effect of Gd3+ and Zn2+ co-doping on thephase composition, surface morphology, photocatalytic activity of TiO2 powder samples was investigated. The photocatalytic activitywas evaluated via the photodegradation of methyl blue dye in solution. The results show that the obtained sample is a mesoporousmaterial with anatase phase structure. The nanocrystalline TiO2 co-doped with Gd3+ and Zn2+ exhibits a synergistic effect, whichenhances the photocatalytic activity of TiO2 powder. Two dopants of Gd3+ and Zn2+ in nanocrystalline TiO2 have different effects onsuppressing the recombination of photogenerated electrons and holes, namely, Gd3+ serves as an electron trap and Zn2+ serves as ahole trap. TiO2 powder co-doped with 0.5%Gd3+ and 0.3%Zn2+ has the optimum photocatalytic activity. The photodegradationefficiency is 99.5% after 40 min ultraviolet irradiation. Compared to TiO2 mono-doped with either 0.5%Gd3+ or 0.3%Zn2+, thephotodegradation efficiency of TiO2 powder co-doped with 0.5%Gd3+ and 0.3%Zn2+ is increased by 11.5% and 9.3%, respectively.

基金项目：

福建省高校产学合作科技重大关键资助项目(2012H6008)；福州市科技计划项目(2013-G-92)资助。

作者简介：

第一作者：冀峰(1989—)，女，硕士研究生。通信作者：郑玉婴(1959—)，女，博士，教授。

参考文献：

[1] FUJISHIMA A, RAO T N, TRYK D A. Titanium dioxidephotocatalysis [J]. J Photochem Photobiol, 2000, 1(1): 1–21.

[2] KHAN S U, AL-SHAHRY M, INGLER W B. Efficient photochemicalwater splitting by a chemically modified n-TiO2 [J]. Science, 2002,297(5590): 2243–2245.

[3] 潘能乾, 廖建军, 李丹红, 等. TiO2 纳米管阵列电极制备与光催化制氢性能的关系[J]. 硅酸盐学报, 2013, 41(10): 1366–1374.PAN Nengqian, LIAO Jianjun, LI Danhong, et al. J Chin Ceram Soc,2013, 41(10): 1366–1374.

[4] YU C, ZHOU W, YANG K, et al. Hydrothermal synthesis ofhemisphere-like F-doped anatase TiO2 with visible light photocatalyticactivity[J]. J Mater Sci, 2010, 45(21): 5756–5761.

[5] 穆寄林, 刘瑞来, 刘俊劭, 等. 钒掺杂TiO2 纳米纤维的制备及其光催化性能[J]. 硅酸盐学报, 2013, 41(6): 863–866.MU Jilin, LIU Ruilai, LIU Junshao, et al. J Chin Ceram Soc, 2013,41(6): 863–866.

[6] SAKTHIVEL S, SHANKAR M, PALANICHAMY M, et al.Enhancement of photocatalytic activity by metal deposition:CHaracterisation and photonic efficiency of Pt, Au and Pd deposited onTiO2 catalyst [J]. Water Res, 2004, 38(13): 3001–3008.

[7] CHENG K, SUN W, JIANG H Y, et al. Sonochemical deposition of Aunanoparticles on different facets-dominated anatase TiO2 singlecrystals and resulting photocatalytic performance [J]. J Phys Chem C,2013, 117(28): 14600–14607.

[8] WANG J, LIN Z. Dye-sensitized TiO2 nanotube solar cells withmarkedly enhanced performance via rational surface engineering [J].Chem Mater, 2009, 22(2): 579–584.

[9] 黄成, 常婷, 张越, 等. 卟啉锡敏化TiO2 纳米管的光催化活性和光电性能[J]. 无机化学学报, 2014, 30(2): 331–336.HUANG Cheng, CHANG Ting, ZHANG Yue, et al. Chin J InorgChem (in Chinese), 2014, 30(2): 331–336.

[10] 刘子传, 郑经堂, 赵东风, 等. 金属离子掺杂改性纳米TiO2 的能带结构及其光催化性能[J]. 硅酸盐学报, 2013, 41(3): 402–408.LIU Zichuan, ZHENG Jingtang, ZHAO Dongfeng, et al. J Chin CeramSoc, 2013, 41(3): 402–408.

[11] 赵芳, 倪刚, 赵雅琼, 等. Fe, N 共掺杂TiO2/SiO2 复合材料的制备及光催化性能[J]. 硅酸盐学报, 2014, 42(6): 802–807.ZHAO Fang, NI Gang, ZHAOYaqiong, et al. J Chin Ceram Soc, 2014,42(6): 802–807.

[12] WANG T, MAO Y D, TANG F P, et al. Crystallization andphotocatalytic-activity of TiO2 doped with metal ions prepared byadsorption phase synthesis [J]. Adv Mater Res, 2013, 624: 194–199.

[13] MAHALAKSHMI M, ARABINDOO B, PALANICHAMY M, et al.Preparation, characterization, and photocatalytic activity of Gd3+doped TiO2 nanoparticles [J]. J Nanosci Nanotechnol, 2007, 7(9):3277–3285.

[14] XU A W, GAO Y, LIU H Q. The preparation, characterization, andtheir photocatalytic activities of rare-earth-doped TiO2 nanoparticles [J].J Catal, 2002, 207(2): 151–157.

[15] ZHOU Y, ZHANG S Y, ZHU Z P, et al. Preparation and photocatalyticactivity of Gd-doped TiO2 nanofibre [J]. J Cent South Univ, 2005,12(6): 657–661.

[16] LIU H, LIU G, ZHOU Q, et al. Preparation and photocatalytic activityof Gd3+-doped trititanate nanotubes [J]. Micropor Mesopor Mater, 2011,142(2): 439–443.

[17] JOO J B, ZHANG Q, LEE I, et al. Mesoporous anatase titania hollownanostructures though silica-protected calcination [J]. Adv Funct Mater,2012, 22(1): 166–174.

[18] 李纲, 刘昉, 阳启华, 等. Si 掺杂对TiO2 空心微球微结构和光催化性能的影响[J]. 催化学报, 2011, 32(2): 286-292.LI Gang, LIU Fang, YANG Qihua, et al. Chin J Catal (in Chinese),2011, 32(2): 286–292.

[19] DENG L, WANG S, LIU D, et al. Synthesis, characterization ofFe-doped TiO2 nanotubes with high photocatalytic activity [J]. CatalLett, 2009, 129(3-4): 513–518.

服务与反馈：

【文章下载】【加入收藏】