铁离子掺杂<strong>TiO<sub>2</sub></strong> 的制备及其光催化性能

doi:10.11901/1005.3093.2021.397

材料研究学报

2022, Vol. 36

Issue (11): 862-870 DOI: 10.11901/1005.3093.2021.397

研究论文

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铁离子掺杂TiO₂ 的制备及其光催化性能

荆倩, 曹晗, 刘方园, 郗会娟, 李超祥, 邵韵航, 曹美文, 夏永清, 王生杰(

)

中国石油大学(华东)化学工程学院青岛 266580

Preparation and Photocatalytic Property of Iron-doped Titanium Dioxide Nanomaterials

JING Qian, CAO Han, LIU Fangyuan, XI Huijuan, LI Chaoxiang, SHAO Yunhang, CAO Meiwen, XIA Yongqing, WANG Shengjie(

)

College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China

引用本文:

荆倩, 曹晗, 刘方园, 郗会娟, 李超祥, 邵韵航, 曹美文, 夏永清, 王生杰. 铁离子掺杂TiO₂ 的制备及其光催化性能[J]. 材料研究学报, 2022, 36(11): 862-870.
Qian JING, Han CAO, Fangyuan LIU, Huijuan XI, Chaoxiang LI, Yunhang SHAO, Meiwen CAO, Yongqing XIA, Shengjie WANG. Preparation and Photocatalytic Property of Iron-doped Titanium Dioxide Nanomaterials[J]. Chinese Journal of Materials Research, 2022, 36(11): 862-870.

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摘要:

将Bola型两亲性短肽KI₃E在水溶液中组装成稳定的纤维状结构，以其自组装体作为有机模板并使用氨丙基三乙氧基硅烷为结构导向剂，利用其对TiO₂前驱体-二(2-羟基丙酸)二氢氧化二铵合钛的水解催化作用以及肽模板与铁离子之间的分子识别作用在TiO₂矿化沉积的同时引入铁离子，在温和的水溶液中制备出铁离子掺杂TiO₂纳米材料。使用TEM、BET、UV-vis DRS、XPS、XRD等手段对其结构和性能进行了表征。结果表明，铁元素以Fe²⁺/Fe³⁺的形式存在于TiO₂晶格中，抑制了晶体生长并使晶粒尺寸变小。同时，铁离子的掺杂减小了TiO₂的禁带宽度，提高了对可见光的响应和催化性质。铁离子掺杂量为0.5% TiO₂，其光催化性能最好。

关键词 ：无机非金属材料, TiO₂, 离子掺杂, Bola型两亲性短肽, 光催化

Abstract：

Iron-doped titanium dioxide (Fe-TiO₂) nanomaterials were prepared with the stable fibrous nanostructure of self-assembled bola-type amphiphilic short peptide KI₃E as organic templateand aminopropyl triethoxysilane as structure-directing agent via sol-gel process to ensure the simultaneous deposition of the titanium dioxide precursor and iron ions on the surface of the peptide templates. The Fe doped-TiO₂ nanomaterials were fully characterized by Transmission electron microscope, UV-vis diffuse reflection spectroscopy, X-ray photoelectron spectroscopy, X-ray diffractometer. The results show that iron ions instead of partial titanium ions in the crystal lattice of titanium dioxide, which narrows the band gap of TiO₂ and results in enhanced visible light responses. The test results of photocatalytic degradation of rhodamine B and methylene blue indicated that the Fe doped-TiO₂ possessed significantly enhanced photocatalytic performance, compared to the commercial TiO₂ (P25), while reached a maximum when the doping content of iron ions was 0.5%.

Key words： inorganic non-metallic materials titanium dioxide iron-doping bola amphiphilic short-peptide photocatalysis

收稿日期: 2021-07-08

ZTFLH:

O643

基金资助:国家自然科学基金(21773310);山东省重点科技研发计划(2019GGX103047);山东省自然科学基金(ZR2020MB076)

作者简介: 荆倩，女，1993年生，硕士

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	荆倩
	曹晗
	刘方园
	郗会娟
	李超祥
	邵韵航
	曹美文
	夏永清
	王生杰
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https://www.cjmr.org/CN/10.11901/1005.3093.2021.397 或 https://www.cjmr.org/CN/Y2022/V36/I11/862

图1 KI3E分子结构式、KI3E的圆二色光谱、KI3E的红外光谱、KI3E在pH=10条件下的透射电镜图片以及KI3E在pH=10条件下的原子力高度

图2 Fe-TiO2纳米材料的合成过程示意图和Fe-TiO2纳米材料的透射电镜照片

表1 掺杂剂用量不同时铁的实际掺杂含量、各价态铁的含量、比表面积、孔体积以及孔尺寸

图3 铁掺杂量不同的Fe-TiO2纳米材料和P25的禁带宽度

图4 样品FT-0，FT-0.5和FT-15的XPS元素分析的全谱、Fe 2p谱、O 1s谱以及Ti 2p谱

图5 样品Fe-TiO2的XRD谱、Fe2O3和锐钛矿型TiO2的标准XRD谱

表2 Fe-TiO2样品的晶体学数据

图6 (a)Fe-TiO2光催化原理图;铁掺杂量不同的Fe-TiO2材料和P25在可见光下对有机污染物罗丹明(b);亚甲基蓝(c)的降解作用与时间的关系曲线；(d)FT-0.5催化罗丹明B的循环测试

表3 TiO2光催化剂降解模型污染物近期研究结果的比较

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