Zhao Zhipeng, Zhao Qian, Zhou Le, Wei Yi, Lei Biao, Zhang Hongwen, Cai Weiping
Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, PR China; University of Science and Technology of China, Hefei 230026, PR China.
Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, PR China.
J Hazard Mater. 2023 Oct 5;459:132156. doi: 10.1016/j.jhazmat.2023.132156. Epub 2023 Jul 26.
Styrene, a prevalent volatile organic compounds (VOCs), is very harmful to atmosphere and humans. Consequently, the development of efficient detection technologies for styrene is of high importance, which is still in challenge! In this work, we crafted a layered double hydroxide (LDH) porous film-coated gold nanoarray, designed to act as a surface enhanced Raman spectroscopy (SERS) chip for the efficient and portable detection of gaseous styrene. This chip features a covering layer composed of cross-linked LDH nanosheets, notable for their porous structure and high specific surface area. When the covering layer is 100-300 nm in thickness, this composite chip has significant enrichment effect and strong SERS performance to gaseous styrene with a lowest detectable concentration below 1 ppb (4.64 ×10 mg/m), and can response within 10 s, showing the rapid response and high sensitivity. Additionally, the chip has strong anti-interference capabilities and maintains excellent response to styrene, even in mixed benzene-VOCs gases. The exceptional SERS performances of this chip is ascribed to its LDH covering layer-induced styrene-enrichment and structurally-enhanced SERS performances. This study provides a simple route and practical chip for the rapid and ultrasensitive SERS-based detection of gaseous styrene, which is also potentially beneficial for the detection of other gaseous VOCs.
苯乙烯是一种常见的挥发性有机化合物（VOCs），对大气和人类危害极大。因此，开发高效的苯乙烯检测技术至关重要，但目前仍面临挑战！在这项工作中，我们制备了一种层状双氢氧化物（LDH）多孔膜包覆的金纳米阵列，旨在用作表面增强拉曼光谱（SERS）芯片，用于高效便携地检测气态苯乙烯。该芯片具有由交联LDH纳米片组成的覆盖层，其多孔结构和高比表面积显著。当覆盖层厚度为100 - 300 nm时，这种复合芯片对气态苯乙烯具有显著的富集效果和强大的SERS性能，最低检测浓度低于1 ppb（4.64×10 mg/m），并能在10 s内响应，显示出快速响应和高灵敏度。此外，该芯片具有很强的抗干扰能力，即使在苯 - VOCs混合气体中，对苯乙烯仍保持优异的响应。这种芯片出色的SERS性能归因于其LDH覆盖层诱导的苯乙烯富集和结构增强的SERS性能。本研究为基于SERS的气态苯乙烯快速超灵敏检测提供了一种简单途径和实用芯片，这对其他气态VOCs的检测也可能具有潜在益处。
