具有暴露(001)面的n掺杂TiO2纳米片的简单合成以增强光催化活性

IF 1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-10-30 DOI:10.15251/djnb.2023.184.1147

Y. Sun, Y. Zhong, X. Luo, Y. J. Duan, K. Lei, L. J. Mao, W. Feng

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引用次数: 0

摘要

以TiN为前驱体，采用水热法制备了暴露(001)表面的氮掺杂TiO2。考察了HF和HCl的比例对晶体结构、形貌、光学性能和光催化活性的影响。通过氙灯光源对亚甲基蓝(MB)的降解，考察了n掺杂TiO2纳米片的光催化性能。结果表明，在不含HF的情况下，TiO2表现为单一金红石相的纳米棒结构;而在含HF的情况下，锐钛矿型TiO2表现为暴露(001)面的纳米片结构。随着HF添加量的增加，n掺杂TiO2的降解率逐渐降低。当HF添加量为1 mL时，TiO2表现出最高的光催化活性，这主要归因于较大的比表面积和最佳的暴露百分率(001)。

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Facile synthesis of N-doped TiO2 nanosheets with exposed (001) facets for enhancing photocatalytic activity

Nitrogen-doped TiO2 with exposed (001) facets was prepared by hydrothermal method using TiN as precursor. The effect of the proportion of HF and HCl on the crystal structure, morphology, optical properties and photocatalytic activity were investigated. The photocatalytic performance of N-doped TiO2 nanosheets was evaluated by the degradation of methylene blue (MB) under xenon lamp light source. The results showed that TiO2 demonstrated nanorod structure with a single rutile phase in the absence of HF while anatase TiO2 exhibited nanosheet structure with exposed (001) facets in the presence of HF. With the increase of HF addition, the degradation rate of the N-doped TiO2 decreased gradually. When the addition of HF was 1 mL, TiO2 showed the highest photocatalytic activity, which was mainly attributed to the large specific surface area and optimal percentage of exposed (001) facets.

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