Development of an ALD-Pt@SWCNT/Graphene 3D Nanohybrid Architecture for Hydrogen Sensing
Development of an ALD-Pt@SWCNT/Graphene 3D Nanohybrid Architecture for Hydrogen Sensing
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DOI：
10.1021/acsami.0c15532
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发表时间：
2020-11-25
影响因子：
9.5
通讯作者：
Wu, Judy Z.
中科院分区：
文献类型：
--
作者：
Liu, Bo;Alamri, Mohammed;Wu, Judy Z.
提出了一种由单壁碳纳米管膜和石墨烯异质结构组成的纳米杂化结构(SWCNT/石墨烯)作为三维电极。利用催化铂的大传感面积和共形包覆纳米结构，利用原子层沉积(ALD)技术将催化铂纳米粒子共形包覆在3DALD-Pt@SWCNT/石墨烯纳米杂化结构上，以进一步增强氢气传感。值得注意的是，在SWCNT/石墨烯纳米杂化中，H-2响应被发现提高了50%，这表明石墨烯提供了更有效的电荷传输。ALD-铂进一步提高了3D ALD-PT@SWCNT/石墨烯纳米杂化材料的氢气响应性。通过在SWCNT/石墨烯纳米杂化材料上包覆10个循环的ALD-铂，H-2响应(2.77%)大约是未包覆ALD-铂的同类材料(1.4%)的两倍。通过进一步优化3DALD-PT@SWCNT/石墨烯纳米杂化样品的ALD-铂循环次数和SWCNT膜厚度，在SWCNT/石墨烯纳米杂化样品上获得了高达7.5%的氢气响应率。
A nanohybrid architecture composed of single-wall carbon nanotube films and graphene heterostructures (SWCNT/graphene) was developed as a three-dimensional (3D) electrode. Atomic layer deposition (ALD) was used for conformal coating of catalytic Pt nanoparticles on the 3D ALD-Pt@SWCNT/graphene nanohybrid architecture for further enhancement of H-2 sensing, taking advantage of the large sensing area and conformally coated nanostructures of the catalytic Pt. Remarkably, the H-2 response was found to be improved by 50% in the SWCNT/graphene nanohybrid, indicating that graphene provides a more efficient charge transport. The ALD-Pt further enhances the H2 responsivity of the 3D ALD-Pt @SWCNT/graphene nanohybrids. By coating 10 cycles of ALD-Pt on the SWCNT/graphene nanohybrid, the H-2 response (2.77%) is approximately twice that (1.4%) of its counterpart without the ALD-Pt. By further optimizing the 3D ALD-Pt@SWCNT/graphene nanohybrids with respect to the ALD-Pt cycle numbers and SWCNT film thickness, a H-2 responsivity as high as 7.5% was achieved on the SWCNT/graphene nanohybrid sample with a 560 nm thick SWCNT film and 50 cycles of ALD-Pt.