以水杨酸为模板分子的Nd掺杂分子印迹TiO<sub>2</sub>的制备及光催化性能

doi:10.11896/cldb.201906007

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Abstract This contribution presents the fabrication, characterization and photocatalytic performance evaluation of neodymium-doped molecularly imprinted titanium dioxide (NMT) which is expected to serve as photocatalysts for organic compounds degradation in aqueous solution. We prepared a series of NMT samples via a sol-gel process, which differed in calcination temperature and Nd doping amount, by using salicylic acid (SA) as template, tetrabutyl titanate as titanium source and neodymium nitrate as dopant. The characterization of the resultant samples was carried out by means of XRD, SEM, TEM, ICP-AES, EDS, XPS, FT-IR, N₂ adsorption-desorption (BET model) and UV-Vis DRS. Moreover, we investigated the photocatalytic activities of the products toward the template molecules (SA), under both UV and visible light irradiations, and with various calcination temperatures, various Nd doping amounts, and various initial pH values of SA solution. The experimental results confirmed the single anatase phase composition of NMT, and a highly porous structure induced by accumulation of grain clusters and template removal. All the NMT samples displayed the photocatalytic activities much higher than those of undoped molecularly imprinted TiO₂ and ordinary (non-imprinted) TiO₂ for the degradation reaction of the template molecule (SA). The NMT sample with molar ratio of Nd/TiO₂ of 0.30% and calcination tempe-rature of 550 ℃ exhibited the highest photocatalytic activity, as it could achieve a 86.4% (within 70 min) degradation rate and a 97.96% (within 30 h) degradation rate for SA aqueous solution (initial concentration 20 mg/L, initial pH=4), under UV and visible irradiations, respectively. In addition, the degradation rate could remain above 83.02% within 4 times of reuse under UV irradiation.

Key words： molecular imprinting neodymium(III) titanium dioxide salicylic acid template molecule photocatalysis sol-gel method ultraviolet light visible light

Published: 03 April 2019

CLC number:

O649.4

Fund:This work was financially supported by the National Natural Science Foundation of China (51562016, 21864015), the Natural Science Foundation of Jiangxi Province(20171BAB206015), the Science & Technology Foundation of Jiujiang University(2016KJ005).

About author:: Changchao Zhan obtained his Ph.D. degree in materials chemical major from Zhejiang University of Technology in January 2014.

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	ZHAN Changchao
	CAO Xiaohua
	JIN Wenxiong
	YE Zhigang
	XIE Baohua
	XU Jianxing
	ZHOU Ronghui

Cite this article:

ZHAN Changchao,CAO Xiaohua,JIN Wenxiong, et al. Fabrication and Photocatalytic Performance of Neodymium-doped Molecularly Imprinted Titanium Dioxide with Salicylic Acid as Template Molecule[J]. Materials Reports, 2019, 33(6): 947-953.

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http://www.mater-rep.com/EN/10.11896/cldb.201906007 OR http://www.mater-rep.com/EN/Y2019/V33/I6/947

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