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氢氧化钠浓度对微波辅助水热法合成硒化锌/氧化石墨烯复合材料的影响

Effect of Sodium Hydroxide Concentration in Synthesizing Zinc Selenide/Graphene Oxide Composite via Microwave-Assisted Hydrothermal Method.

作者信息

Lee Han Kee, Talib Zainal Abidin, Mamat Mat Nazira Md Shuhazlly, Wang EnZe, Lim Hong Ngee, Mahdi Mohd Adzir, Ng Eng Khoon, Yusoff Norita Mohd, Al-Jumaili Batool Eneaze, Liew Josephine Ying Chyi

机构信息

Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400 UPM, Selangor, Malaysia.

Institute of Advanced Technology, Universiti Putra Malaysia, Serdang 43400 UPM, Selangor, Malaysia.

出版信息

Materials (Basel). 2019 Jul 18;12(14):2295. doi: 10.3390/ma12142295.

DOI:10.3390/ma12142295
PMID:31323741
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6678425/
Abstract

The effect of NaOH solution on the formation of nanoparticles has been the subject of ongoing debate in selenium-based material research. In this project, the robust correlation between the mechanistic growth of zinc selenide/graphene oxide (ZnSe/GO) composite and the concentration of NaOH are elucidated. The ZnSe/GO composite was synthesized via microwave-assisted hydrothermal method and the concentrations of NaOH are controlled at 2 M, 3 M, 4 M, 5 M and 6 M. The XRD spectra show that the crystal phases of the samples exhibited a 100% purity of ZnSe when the concentration of sodium hydroxide (NaOH) was set at 4 M. The further increase of NaOH concentration leads to the formation of impurities. This result reflects the essential role of hydroxyl ions in modifying the purity state of ZnSe/GO composite. The optical band gap energy of ZnSe/GO composite also decreased from 2.68 eV to 2.64 eV when the concentration of NaOH increased from 2 M to 4 M. Therefore, it can be concluded that the optimum concentration of NaOH used in synthesizing ZnSe/GO composite is 4 M. This project provides an alternative green method in the formation of a high purity ZnSe/GO composite.

摘要

在基于硒的材料研究中，氢氧化钠溶液对纳米颗粒形成的影响一直是一个持续争论的话题。在本项目中，阐明了硒化锌/氧化石墨烯（ZnSe/GO）复合材料的机械生长与氢氧化钠浓度之间的强相关性。通过微波辅助水热法合成了ZnSe/GO复合材料，并将氢氧化钠的浓度控制在2M、3M、4M、5M和6M。XRD光谱表明，当氢氧化钠（NaOH）浓度设定为4M时，样品的晶相显示出100%纯度的ZnSe。氢氧化钠浓度的进一步增加会导致杂质的形成。这一结果反映了氢氧根离子在改变ZnSe/GO复合材料纯度状态方面的重要作用。当氢氧化钠浓度从2M增加到4M时，ZnSe/GO复合材料的光学带隙能量也从2.68eV降低到2.64eV。因此，可以得出结论，合成ZnSe/GO复合材料时使用的氢氧化钠的最佳浓度为4M。该项目为形成高纯度ZnSe/GO复合材料提供了一种替代的绿色方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8540/6678425/8bb0280a69b1/materials-12-02295-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8540/6678425/d66b3c453b33/materials-12-02295-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8540/6678425/bbf79129bc41/materials-12-02295-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8540/6678425/c8fac68a3f25/materials-12-02295-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8540/6678425/8bb0280a69b1/materials-12-02295-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8540/6678425/d66b3c453b33/materials-12-02295-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8540/6678425/bbf79129bc41/materials-12-02295-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8540/6678425/c8fac68a3f25/materials-12-02295-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8540/6678425/8bb0280a69b1/materials-12-02295-g005.jpg

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