In-situ Thermolysis Preparation of Carbon Capsulated Nano-copper and Its Stability

doi:10.11901/1005.3093.2021.477

Chinese Journal of Materials Research

2022, Vol. 36

Issue (11): 829-836 DOI: 10.11901/1005.3093.2021.477

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In-situ Thermolysis Preparation of Carbon Capsulated Nano-copper and Its Stability

ZONG Ping¹^,²^,³, LI Shiwei²^,³, CHEN Hong²^,³, MIAO Sainan²^,³, ZHANG Hui⁴, LI Chao²^,³(

)

^1.School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China
^2.Xi'an Jiaotong University Suzhou Academy, Suzhou 215123, China
^3.School of Nano-Science and Nano-Engineering (Suzhou), Xi'an Jiaotong University, Suzhou 215123, China
^4.State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China

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ZONG Ping, LI Shiwei, CHEN Hong, MIAO Sainan, ZHANG Hui, LI Chao. In-situ Thermolysis Preparation of Carbon Capsulated Nano-copper and Its Stability. Chinese Journal of Materials Research, 2022, 36(11): 829-836.

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Abstract

Nano-copper-carbon composites (NCCC) was prepared by one-step pyrolysis in nitrogen atmosphere using natural cotton fiber with adsorbate copper sulfate as template. The carbon coated nano-Cu or micro-Cu was in situ prepared by taking cotton fiber with adsorbate copper sulfate as pyrolytic carbon source and commercial nano-copper or micro-copper as Cu source. The stability of the prepared material was characterized by TEM, XRD and Raman spectroscopy. The results show that NCCC is a typical material with carbon coated nano-Cu core-shell structure, and the carbon coated nano- or micron-Cu materials can be prepared by in-situ pyrolysis, which further confirmed that the pyrolysis atmosphere of cotton fiber could act as carbon source and in-situ reducing agent at the same time. And the oxidation resistance of carbon coated material was verified：the formation of carbon shells allows NCCC to maintain the phase composition of copper and cuprous oxide after exposure to air for 180 days or water for 35 days, and the commercial Cu nanoparticles covered with carbon shells have not been oxidized after 120 days of exposure to air.

Key words: composites core-shell structure in-situ thermolysis nano-copper stability

Received: 18 August 2021

ZTFLH:

TB333

Fund: National Natural Science Foundation of China(22005237);Natural Science Foundation of Ningxia(2021AAC03029);Natural Science Foundation of Jiangsu Province(BK20191188);Jiangsu Province Foreign Expert Program(BX2020032)

About author: LI Chao, Tel: 13962190459, E-mail:cl12@mail.xjtu.edu.cn

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	Ping ZONG
	Shiwei LI
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	Sainan MIAO
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https://www.cjmr.org/EN/10.11901/1005.3093.2021.477 OR https://www.cjmr.org/EN/Y2022/V36/I11/829

Fig.1 TEM images of NCCC (a, b) and particle size of copper particles (c)

Fig.2 XRD patterns of NCCC

Fig.3 TEM images of Nano-Cu (a, b), Nano-Cu-air (c, d), Nano-Cu-air-Cotton (e, f) and Nano-Cu-air-N₂ (g, h)

Fig.4 Raman spectrum and XRD patterns of Nano-Cu and Micro-Cu before and after treatment

Fig.5 TGA curves of Nano-Cu, (a) tested in N₂ atmosphere (10℃/min), (b) tested in air atmosphere (10℃/min)

Table 1 Phase composition of Nano-Cu before and after treatment

Fig.6 TEM images of Micro-Cu (a), Micro-Cu-air (b), Micro-Cu-air-Cotton (c, d, e), and Micro-Cu-air-N₂ (f, g)

Table 2 Phase composition of Micro-Cu before and after treatment

Fig.7 XRD patterns of carbon-capsulated nano-copper particles stored in different environment for different time (a) NCCC stored in different environment for different time; (b) Nano-Cu stored for one day and 120 d; (c) Nano-Cu-air-Cotton stored for 1 d and 120 d

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