碳包覆纳米铜的原位热解法制备及其稳定性

doi:10.11901/1005.3093.2021.477

材料研究学报

2022, Vol. 36

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

研究论文

本期目录 | 过刊浏览

碳包覆纳米铜的原位热解法制备及其稳定性

宗平¹^,²^,³, 李世伟²^,³, 陈红²^,³, 苗赛男²^,³, 张慧⁴, 李超²^,³(

)

^1.西安交通大学航天航空学院西安 710049
^2.西安交通大学苏州研究院苏州 215123
^3.西安交通大学纳米科学与工程技术学院(苏州) 苏州 215123
^4.宁夏大学化学化工学院省部共建煤炭高效利用与绿色化工国家重点实验室银川 750021

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

引用本文:

宗平, 李世伟, 陈红, 苗赛男, 张慧, 李超. 碳包覆纳米铜的原位热解法制备及其稳定性[J]. 材料研究学报, 2022, 36(11): 829-836.
Ping ZONG, Shiwei LI, Hong CHEN, Sainan MIAO, Hui ZHANG, Chao LI. In-situ Thermolysis Preparation of Carbon Capsulated Nano-copper and Its Stability[J]. Chinese Journal of Materials Research, 2022, 36(11): 829-836.

全文: PDF(16614 KB) HTML

摘要:

以天然棉纤维为模板用一步热解法在氮气气氛中原位制备纳米铜碳复合材料(NCCC)，再以浸泡了硫酸铜的棉纤维为热解碳源、以商业纳米铜和微米铜为铜源原位制备了碳包覆纳米/微米铜。使用TEM、XRD和Raman等手段对其表征，研究了这种材料的稳定性。结果表明，NCCC是一种典型的具有碳包覆纳米铜核壳结构的材料；用原位热解法制备碳包覆金属纳米/微米材料，进一步证实棉纤维热解气氛为碳源及原位还原剂。验证了碳包覆材料的抗氧化性：碳壳的形成使NCCC暴露在空气中180 d或水中35 d后仍保持铜和氧化亚铜的物相组成；受碳壳保护的商业纳米铜，暴露空气中120 d仍未氧化。

关键词 ：复合材料, 核壳结构, 原位热解, 纳米铜, 稳定性

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

收稿日期: 2021-08-18

ZTFLH:

TB333

基金资助:国家自然科学基金(22005237);宁夏回族自治区自然科学基金(2021AAC03029);江苏省自然科学基金(BK20191188);江苏省引智项目(BX2020032)

作者简介: 宗平，女，1981年生，高级工程师
李世伟，男，1990年生，硕士

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.477 或 https://www.cjmr.org/CN/Y2022/V36/I11/829

图1 NCCC的TEM照片和NCCC中铜颗粒粒径的统计

图2 NCCC的XRD谱

图3 Nano-Cu、Nano-Cu-air、Nano-Cu-air-Cotton和Nano-Cu-air-N2的TEM照片

图4 Nano-Cu和Micro-Cu热处理前后的拉曼谱和XRD谱

图5 Nano-Cu热重分析图

表1 商业纳米铜处理前后的物相组成

图6 Micro-Cu、Micro-Cu-air、Micro-Cu-air-Cotton和Micro-Cu-air-N2的TEM照片

表2 商业微米铜处理前后的物相组成

图7 碳包覆纳米铜在不同环境放置不同时间后的XRD谱

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