Cu掺杂金红石型TiO2 的制备及其光催化性能

doi:10.11901/1005.3093.2021.454

材料研究学报

2022, Vol. 36

Issue (8): 635-640 DOI: 10.11901/1005.3093.2021.454

研究论文

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Cu掺杂金红石型TiO₂ 的制备及其光催化性能

朱晓东¹, 夏杨雯¹, 喻强², 杨代雄¹, 何莉莉¹, 冯威¹(

)

^1.成都大学机械工程学院成都 610106
^2.四川新亚无损检测有限公司成都 610213

Preparation and Characterization of Cu Doped Rutile TiO₂ and Photocatalytic Property

ZHU Xiaodong¹, XIA Yangwen¹, YU Qiang², Yang Daixiong¹, HE Lili¹, FENG Wei¹(

)

^1.School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
^2.Sichuan Xinya Non-Destructive Testing Co. Ltd, Chengdu 610213, China

引用本文:

朱晓东, 夏杨雯, 喻强, 杨代雄, 何莉莉, 冯威. Cu掺杂金红石型TiO₂ 的制备及其光催化性能[J]. 材料研究学报, 2022, 36(8): 635-640.
Xiaodong ZHU, Yangwen XIA, Qiang YU, Daixiong Yang, Lili HE, Wei FENG. Preparation and Characterization of Cu Doped Rutile TiO₂ and Photocatalytic Property[J]. Chinese Journal of Materials Research, 2022, 36(8): 635-640.

全文: PDF(9454 KB) HTML

摘要:

用溶胶-凝胶法在650℃条件下,制备了Cu掺杂金红石型TiO₂光催化剂,使用XRD、SEM、TEM、XPS、BET、PL和DRS等手段对其晶体结构、表面形貌、元素组成与价态、比表面积和光学性质进行了表征。结果表明,纯TiO₂是少量锐钛矿与大量金红石组成的混晶,Cu掺杂有利于锐钛矿向金红石的转变,Cu掺杂TiO₂全部为金红石。Cu元素以+1价和+2价共存的形式存在于样品中。以罗丹明B为目标污染物、以氙灯为紫外可见光光源考察这种光催化剂的活性时发现,Cu掺杂降低了光催化活性,Cu掺杂能抑制光生电子与空穴的复合但是使光催化剂在紫外部分的吸收降低,即降低了材料的光催化活性。

关键词 ：无机非金属材料, 金红石二氧化钛, 铜掺杂, 光催化性能, 溶胶凝胶法

Abstract：

Cu-doped rutile TiO₂ photocatalysts with different concentrations were prepared by sol-gel method at 650℃. The crystal structure, surface morphology, elemental composition and valence state, surface area and optical property of the obtained photocatalysts were characterized by XRD, SEM, TEM, XPS, BET, PL and DRS. The results show that pure TiO₂ is a mixed crystal composed of a small amount of anatase and a large amount of rutile. Cu doping is conducive to the transformation of anatase to rutile, and Cu-doped TiO₂ forms single rutile phase. Cu element exists in the form of +1 and +2 valence coexistence in the sample. Using rhodamine B as the target pollutant and xenon lamp as the UV-visible light source, the photocatalytic activity was investigated. The results show that Cu doping inhibits the photocatalytic activity. The results of optical property show that although Cu doping is beneficial to suppressing the recombination of photogenerated electrons and holes, it reduces the absorption of the photocatalyst in the ultraviolet religion, which leads to the decline of photocatalytic activity.

Key words： inorganic non-metallic materials rutile TiO₂ Cu doping photocatalytic activity sol-gel method

收稿日期: 2021-08-13

ZTFLH:

O614.41

基金资助:四川省科技厅应用基础研究(2019YJ0664);成都大学大学生创新计划(S202111079008);成都大学大学生创新计划(S202111079118)

作者简介: 朱晓东,男,1984年生,副教授

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.454 或 https://www.cjmr.org/CN/Y2022/V36/I8/635

图1 纯TiO2和Cu-TiO2的XRD谱

图2 纯TiO2和3%Cu-TiO2的SEM照片

图3 纯TiO2和3%Cu-TiO2的TEM照片

图4 3％Cu-TiO2的XPS谱

图5 纯TiO2和3％Cu-TiO2的N2吸附脱附曲线

图6 纯TiO2和Cu-TiO2的降解曲线和动力学曲线

图7 纯TiO2和Cu-TiO2的PL谱

图8 纯TiO2和Cu-TiO2的紫外可见吸收光谱

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