高荧光量子产率的二硫化钼量子点制备及荧光性能研究

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Abstract Molybdenum disulfide quantum dots (MoS₂ QDs) have excellent physical and chemical properties, which have potential great applications in catalysis, fluorescent imaging, fluorescent sensing and biological imaging, etc. However, its preparation methods and quantum yield still need further improvement. In this paper, MoS₂ QDs were prepared by using sodium molybdate as molybdenum source and glutathione as sulfur source by one pot “bottom-up” hydrothermal approach, and its fluorescent intensity was used as the monitoring index. The single factor analysis was adopted to optimize the proportion of molybdenum and sulfur source, pH value, reaction time and reaction temperature.The results showed that the best molybdenum and sulfur source ratio was 1∶3.5, the best pH value was between 4-8, the best reaction time was 30 h, the best reaction temperature was 210 ℃. The reaction conditions were also optimized by orthogonal experiment, the optimum reaction conditions was that reaction time was 30 h, reaction temperature was 220 ℃, molybdenum and sulfur source ratio was 1∶3.5, pH value was 3, the best fluorescent quantum yield of MoS₂ QDs was about 21%. The MoS₂ QDs had mono- disperse, those particle size was (4.0 ± 0.35) nm, and being rich in a mino and carboxyl functional groups. Its UV absorption peak was 336 nm, FL emission wavelength was 424 nm, and full width at half maxima was 79 nm. It can lay a foundation for the highly sensitive ion and biomolecular detection of MoS₂ QDs and low toxicity cell imaging.

Key words： molybdenum disulfide quantum dots condition optimization preparation method fluorescent properties fluorescence quantum yield

Published: 09 December 2021

CLC number:	TN304.2
	TQ422

Fund:This work was financially supported by National Natural Science Foundation of China (81860317), Guizhou Province Natural Science Foundation (qkhb 〔2019〕2821, qkhj 〔2016〕1136, qkhj 〔2019〕1301), Qiannan Science and Technology Plan Project (qnhz 〔2016〕12, qnhz 〔2014〕8),Joint Fund of Guizhou Provincial Department of Health and School (gzwkj2012-2-017) and Qiannan National Medical College Scientific Research Fund (qnyz201947, qnyz201921, qnyz201801, qnyz201807, qnyz201843).

About author:: Yiling Wei, master, lecturer, master's degree in Fujian Normal University in 2019, mainly engaged in cell bio-logy, cellular signaling pathway, biologically active substances.
Xianyun Hu, Ph.D, professor, doctoral degree in Southeast University in 2018, mainly engaged in natio-nal medicinal nano medicine, nanomaterial research.
Wenjiang Deng,mainly studies new fluorescent quantum dots, drug metabolism in vivo,extraction, separation, detection of compounds.
Caihong Jin,mainly studies drug detection, fluorescent quantum dots, tea process optimization, compound composition and so on.
These authors contributed equally to this work.

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	WEI Yiling
	DENG Wenjiang
	JIN Caihong
	LI Hui
	WANG Chuanming
	MENG Tiehong
	ZHANG Wenjuan
	ZHAO Hongbin
	SHUAI Guangping
	YANG Zhengmin
	LI Chunrong
	HU Xianyun

Cite this article:

WEI Yiling,DENG Wenjiang,JIN Caihong, et al. Preparation and Fluorescent Properties of Molybdenum Disulfide Quantum Dots With High Fluorescence Quantum Yield[J]. Materials Reports, 2021, 35(z2): 13-17.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2021/V35/Iz2/13

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