Enhanced Superhydrophobic Performance of BN-MoS2 Heterostructure Prepared via a Rapid, One-Pot Supercritical Fluid Processing.
Enhanced Superhydrophobic Performance of BN-MoS2 Heterostructure Prepared via a Rapid, One-Pot Supercritical Fluid Processing.
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DOI：
10.1021/acs.langmuir.7b00483
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发表时间：
2017-06
期刊：
影响因子：
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通讯作者：
Pitchai Thangasamy;T. Partheeban;Subramanian Sudanthiramoorthy;M. Sathish
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文献类型：
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作者：
Pitchai Thangasamy;T. Partheeban;Subramanian Sudanthiramoorthy;M. Sathish
使用一锅超临界流体处理可在 30 分钟内制造出产率 >95% 的高结晶 BN-MoS2 异质结构。通过AFM分析证实所制备的异质结构中存在20-50层BN-MoS2。 HR-TEM 成像和绘图分析揭示了异质结构中融合良好的 BN 和 MoS2 纳米片。与 (002) 面相对应的 XRD 线强度急剧降低，MoS2 上的 BN 系统峰变宽，表明在 SCF 加工过程中 BN 纳米片发生了有效的剥离和横向尺寸减小。此外，剥离的MoS2纳米片比BN纳米片优先暴露；因此，MoS2 纳米片牢固地覆盖异质结构中的 BN 纳米片。具有纳米级粗糙度的剥离BN和MoS2纳米片使得表面具有高度疏水性。结果，BN-MoS2异质结构表现出优异的超疏水性能，水接触角高达165.9°，远高于文献报道的值。
Fabrication of highly crystalline BN-MoS2 heterostructure with >95% yield was demonstrated using one-pot supercritical fluid processing within 30 min. The existence of 20-50 layers of BN-MoS2 in the prepared heterostructure was confirmed by AFM analysis. The HR-TEM imaging and mapping analysis revealed the well-melded BN and MoS2 nanosheets in the heterostructure. The drastic reduction in XRD line intensities corresponding to the (002) plane and broadening of the peaks for the BN system over MoS2 indicated the effective exfoliation and lateral size reduction in BN nanosheets during SCF processing. Also, the exfoliated MoS2 nanosheets are preferentially exposed rather than BN nanosheets; consequently, the MoS2 nanosheets sturdily covered BN nanosheets in the heterostructure. The exfoliated BN and MoS2 nanosheets with nanoscale roughness make the surface highly hydrophobic in nature. As a result, the BN-MoS2 heterostructure showed superior superhydrophobic performance with high water contact angle of 165.9°, which is much higher than the value reported in the literature.