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MXenes induce epitaxial growth of size-controlled noble nanometals: A case study for surface enhanced Raman scattering (SERS)

Cheng Renfei ^1,2 Hu Tao ^1,3 Hu Minmin ^1,2 Li Changji ¹ Liang Yan ¹ Wang Zuohua ⁴ Zhang Hui ⁵ Li Muchan ⁶ Wang Hailong ⁷ Lu Hongxia ⁷ Fu Yunyi ⁶ Zhang Hongwang ⁴ Yang Quanhong ⁸ ^* Wang Xiaohui ¹ ^*

文摘	Noble nanometals are of significance in both scientific interest and technological applications, which are usually obtained by conventional wet-chemical synthesis. Organic surfactants are always used in the synthesis to prevent unexpected overgrowth and aggregation of noble nanometals. However, the surfactants are hard to remove and may interfere with plasmonic and catalytic studies, remaining surfactant-free synthesis of noble nanometals a challenge. Herein, we report an approach to epitaxial growth of sizecontrolled noble nanometals on MXenes. As piloted by density functional theory calculations, along with work function experimental determination, kinetic and spectroscopic studies, epitaxial growth of noble nanometals is initiated via a mechanism that involves an in situ redox reaction. In the redox, MXenes as two-dimensional solid reductants whose work functions are compatible with the reduction potentials of noble metal cations, enable spontaneous donation of electrons from the MXenes to noble metal cations and reduce the cations into nanoscale metallic metals on the outmost surface of MXenes. Neither surfactants nor external reductants are used during the whole synthesis process, which addresses a long-standing interference issue of surfactant and external reductant in the conventional wet-chemical synthesis. Moreover, the MXenes induced noble nanometals are size-controlled. Impressively, noble nanometals firmly anchored on MXenes exhibit excellent performance towards surface enhanced Raman scattering. Our developed strategy will promote the nanostructure-controlled synthesis of noble nanometals, offering new opportunities to further improve advanced functional properties towards practical applications.
来源	Journal of Materials Science & Technology ,2020,40:119-127 【核心库】
DOI	10.1016/j.jmst.2019.09.013
关键词	Two-dimensional materials ; MXene ; In situ redox ; Noble metal ; SERS
地址	1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang National Laboratory for Materials Science, Shenyang, 110016 2. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016 3. University of Chinese Academy of Sciences, Beijing, 100049 4. College of Mechanical Engineering, Yanshan University, National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Qinhuangdao, 066004 5. Department of Materials Science and Engineering, Monash University, Australia, Victoria, 3800 6. Institute of Microelectronics, Key Laboratory of Microelectronic Devices and Circuits, Peking University, Beijing, 100871 7. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001 8. School of Chemical Engineering & Technology, Tianjin University, Tianjin, 300072
语种	英文
文献类型	研究性论文
ISSN	1005-0302
学科	化学;一般工业技术
基金	国家自然科学基金 ; the Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences (CAS) ; the Youth Innovation Promotion Association, CAS ; the Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund
文献收藏号	CSCD:6664541

参考文献共 44 共3页

引证文献 2 篇

1 Zheng Zixiang In situ reduced MXene/AuNPs composite toward enhanced charging/discharging and specific capacitance Journal of Advanced Ceramics,2021,10(5):1061-1071
被引 4 次

2 Zhou Aiguo From structural ceramics to 2D materials with multi-applications:A review on the development from MAX phases to MXenes Journal of Advanced Ceramics,2021,10(6):1194-1242
被引 12 次

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