Xiang ZhongCheng, Zhang Zhong, Xu XiJin, Zhang Qin, Wang QingBao, Yuan Chengwu
School of Physics and Technology, University of Jinan, Jinan 250022, China.
Phys Chem Chem Phys. 2015 Jun 28;17(24):15822-8. doi: 10.1039/c5cp01509j. Epub 2015 May 28.
Via the hydrothermal method, we synthesized MoS2 nanosheets with varying Co dopant concentrations of 0%, 3%, 7%, using cobaltous acetate as a promoter, and marked as A, B, and C, respectively. We found that the thickness and flatness of the nanosheets increased with the increase of the Co dopant concentrations. Meanwhile, the BET surface area of samples (A, B, and C) decreased with the increase of the Co dopant concentrations. Optical absorption spectroscopy showed that, compared to sample A, the A1 and B1 excitons of samples B and C were 10 and 23 meV redshifted, respectively. Then, we performed magnetization measurement to investigate the effect of Co-doping; the unique result implied that the values of the magnetic moment decreased with the increase of the Co dopant concentrations. We performed DFT computations to address the above magnetic result. The computational result indicated that the value of the magnetic moment decreased with the increase of the Co dopant concentrations, which is in agreement with the results of the experiments described above.
通过水热法，我们以醋酸钴为促进剂合成了钴掺杂浓度分别为0%、3%、7%的二硫化钼纳米片，并分别标记为A、B和C。我们发现纳米片的厚度和平整度随着钴掺杂浓度的增加而增加。同时，样品（A、B和C）的比表面积随着钴掺杂浓度的增加而减小。光吸收光谱表明，与样品A相比，样品B和C的A1和B1激子分别发生了10和23 meV的红移。然后，我们进行了磁化测量以研究钴掺杂的影响；独特的结果表明磁矩值随着钴掺杂浓度的增加而减小。我们进行了密度泛函理论计算以解释上述磁学结果。计算结果表明磁矩值随着钴掺杂浓度的增加而减小，这与上述实验结果一致。
