二硫化钼纳米薄片分散液的剥离制备

doi:10.16180/j.cnki.issn1007-7820.2019.04.014

摘要/Abstract

摘要：

文中采用液相超声剥离粉末二硫化钼制备了纳米薄片分散液,通过紫外可见吸收光谱测定分散液的浓度,并探索了超声功率、超声时间以及二硫化钼初始浓度对纳米薄片分散液浓度的影响。实验结果表明,当超声功率为350 W,超声时间为48 h,二硫化钼初始浓度为10 mg/mL时,所制备的纳米薄片分散液浓度可达0.16 mg/mL。在剥离过程中加入聚乙烯吡咯烷酮,可以有效避免由于纳米薄片自身团聚而导致的分散液稳定性差的问题,所得到的二硫化钼纳米薄片分散液可稳定存放超过两个月;同时,PVP的加入可将二硫化钼纳米薄片分散液浓度提高至0.42 mg/mL。

关键词: 液相超声剥离, 二硫化钼, 纳米薄片, 团聚, 聚乙烯吡咯烷酮, 稳定性

Abstract:

In this paper, nano-flaky dispersion was prepared by liquid exfoliation from bulk material. The concentration of the dispersion was determined by UV-Vis spectra, and the effects of ultrasonic power, ultrasonic time, initial concentration of molybdenum disulfide on the concentration of nano-flakes dispersion were explored. Experimental data showed that when the ultrasonic power was 350 W, the ultrasonic time was 48 h, and the initial concentration of molybdenum disulfide was 10 mg/mL, the concentration of the nano-flakes could reach 0.16 mg/mL. During the stripping process, the addition of PVP could effectively avoid the problem of poor stability of the dispersion due to self-agglomeration of the nanoflakes, and the resulting dispersion of molybdenum disulfide nanoflakes could be stably stored for more than two months. Meanwhile, the addition of PVP increased the concentration of MoS₂/PVP dispersion to 0.42 mg/mL.

Key words: liquid exfoliation, MoS₂, nanosheets, agglomeration, PVP, stabilization

中图分类号:

TN04

刘陈仁浪,李培真,陈龙,安琪. 二硫化钼纳米薄片分散液的剥离制备[J]. 电子科技, 2019, 32(4): 64-67.

LIU Chenrenlang,LI Peizhen,CHEN Long,AN Qi. Preparation of Liquid Exfoliation of MoS₂ Nanosheets Dispersion[J]. Electronic Science and Technology, 2019, 32(4): 64-67.

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参考文献 16

[1]	Torrisi F, Hasan T, Wu Weiping , et al. Inkjet-printed graphene electronics[J]. Acs Nano, 2011,6(4):2992-3006.
[2]	Ghatak S, Pal A N, Ghosh A . Nature of electronic states in atomically thin MoS₂ field-effect transistors[J]. Acs Nano, 2011,5(10):7707-7712. doi: 10.1021/nn202852j pmid: 21902203
[3]	Braga D, Gutiérrez L I, Berger H , et al. Quantitative determination of the band gap of WS₂ with ambipolar ionic liquid-gated transistors[J]. Nano Letters, 2013,12(10):5218-5223. doi: 10.1021/nl302389d pmid: 22989251
[4]	Late D J, Liu Bin, Luo Jiajun , et al. GaS and GaSe ultrathin layer transistors[J]. Advanced Materials, 2012,24(26):3549-3554. doi: 10.1002/adma.201201361 pmid: 22678832
[5]	Erande M B, Pawar M S, Late D J . Humidity sensing and photodetection behavior of electrochemically exfoliated atomically thin-layered black phosphorus nanosheets[J]. ACS Application Mater Interfaces, 2016,8(18):11548-11556. doi: 10.1021/acsami.5b10247 pmid: 27096546
[6]	Liu Wenqing, Yang Xi, Zhang Yingying , et al. Ultra-stable two-dimensional MoS₂ solution for highly efficient organic solar cells[J]. Rsc Advances, 2014,4(62):32744-32748. doi: 10.1039/c4ra04116j
[7]	Zhang Yijin, Ye Jianting, Matsuhashi Y , et al. Ambipolar MoS₂ thin flake transistors[J]. Nano Letters, 2012,12(3):1136-1140. doi: 10.1021/nl2021575
[8]	Yoon Y, Ganapathi K, Salahuddin S . How good can monolayer MoS₂ transistors Be?[J]. Nano Letters, 2011,11(9):3768-3773. doi: 10.1021/nl2018178
[9]	He Qiyuan, Zeng Zhiyuan, Yin Zongyou , et al. Fabrication of flexible MoS₂ thin-film transistor arrays for practical gas-sensing applications[J]. Small, 2012,8(19):2994-2999. doi: 10.1002/smll.201201224 pmid: 22778003
[10]	Zhang Shaolin, Choi H H, Yue H Y , et al. Controlled exfoliation of molybdenum disulfide for developing thin film humidity sensor[J]. Current Applied Physics, 2014,14(3):264-268. doi: 10.1016/j.cap.2013.11.031
[11]	Voiry D, Salehi M, Silva R , et al. Conducting MoS₂ nanosheets as catalysts for hydrogen evolution reaction[J]. Nano Letters, 2013,13(12):6222-6227. doi: 10.1021/nl403661s pmid: 24251828
[12]	Perkins F K, Friedman A L, Cobas E , et al. Chemical vapor sensing with monolayer MoS₂[J]. Nano Letters, 2013,13(2):668-673. doi: 10.1021/nl3043079
[13]	Zhu Changfeng, Zeng Zhiyuan, Li Hai , et al. Single-layer MoS₂-based nanoprobes for homogeneous detection of biomolecules[J]. Journal of the American Chemical Society, 2013,135(16):5998-6001. doi: 10.1021/ja4019572
[14]	Lee Y H, Zhang Xinquan, Zhang Wenjing , et al. Synjournal of large-area MoS₂ atomic layers with chemical vapor deposition[J]. Advanced Materials, 2012,24(17):2320-2325. doi: 10.1002/adma.201104798
[15]	Yao Yagang, Tolentino L, Yang Zhongzheng , et al. High concentration aqueous dispersions of MoS₂[J]. Advanced Functional Materials, 2013,23(28):3577-3583. doi: 10.1002/adfm.v23.28
[16]	Coleman J N, Lotya M, O'Neill A ,et al. Two-dimensional nanosheets produced by liquid exfoliation of layered materials[J]. Science, 2011,331(18):568-571. doi: 10.1126/science.1194975

样品编号	A1	B1	C1
MoS₂初始浓度/mg·mL^-1	10	10	10
超声功率/W	200	350	500
超声处理时间/h	48	48	48
离心速率/rpm	7 500	7 500	7 500

样品编号	A2	B2	C2
MoS₂初始浓度/mg·mL^-1	10	10	10
超声功率/W	350	350	350
超声处理时间/h	24	48	72
离心速率/rpm	7 500	7 500	7 500

样品编号	A3	B3	C3
MoS₂初始浓度/mg·mL^-1	5	10	20
超声功率/W	350	350	350
超声处理时间/h	48	48	48
离心速率/rpm	7 500	7 500	7 500