熔盐法制备纳米多面体结构氧化铜及其催化性能研究

doi:10.15541/jim20140482

无机材料学报 ›› 2015, Vol. 30 ›› Issue (4): 439-442.DOI: 10.15541/jim20140482 CSTR: 32189.14.10.15541/jim20140482

熔盐法制备纳米多面体结构氧化铜及其催化性能研究

曾涛¹, 白杨¹, 李浩², 姚伟峰¹, 董显林³

(1. 上海电力学院, 上海市电力材料防护与新材料重点实验室, 上海200090; 2. 惠州学院, 惠州516007; 3. 中国科学院上海硅酸盐研究所, 上海200050)

收稿日期:2014-09-23 出版日期:2015-04-10 网络出版日期:2015-03-26
作者简介:曾涛. E-mail: zengtao626@hotmail.com

Preparation of Polyhedral Copper Oxide Nanoparticles by Molten-salt
Method and Their Catalytic Performance

ZENG Tao¹, BAI Yang¹, LI Hao², YAO Wei-Feng¹, DONG Xian-Lin³

(1. Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai 200090, China; 2. Huizhou University, Huizhou 516007, China; 3. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)

Received:2014-09-23 Published:2015-04-10 Online:2015-03-26
About author:ZENG Tao(1977–), associate professor. E-mail: zengtao626@hotmail.com
Supported by:
Foundation item: Innovation Program of Shanghai Municipal Education Commission (13YZ106);Natural Science Foundation of Guangdong Province (S2013010015681);High-level Talent Project of the University in Guangdong Province, ‘‘Dawn’’ Program of Shanghai Education Commission (11SG52);Science and Technology Commission of Shanghai Municipality (14DZ2261000)

摘要/Abstract

摘要：

在不添加任何表面活性剂及模板剂的情况下用熔盐法制备出纳米氧化铜颗粒, 用扫描电子显微镜观察发现制备的纳米氧化铜呈现多面体结构, 且氧化铜晶粒大小可通过控制合成过程的煅烧温度来控制, 煅烧温度越高则晶粒越大。在H₂O₂作用下进行了纳米多面体结构氧化铜催化降解罗丹明B的研究。研究结果表明: 与商用纳米氧化铜相比, 该实验制备的纳米氧化铜尽管具有更低的比表面积, 但是其催化性能得到显著的提升。这可能是因为纳米多面体氧化铜的高结晶度及特定指数晶面的暴露所构成的协同作用大幅度提高了其催化性能。

关键词: 氧化铜, 多面体, 催化剂, 纳米材料

Abstract:

Polyhedral copper oxide (CuO) nanoparticles were successfully prepared by a molten-salt method without any surfactant or template. Scanning electron microscopy images of the copper oxide samples demonstrated that the as-prepared nanoparticles have a polyhedral structure. The catalytic performances of copper oxide on the degradation of Rhodamine B in the presence of hydrogen peroxide were investigated. The results show that the polyhedral copper oxide nanoparticles exhibited much better catalytic performance in the degradation of Rhodamine B with hydrogen peroxide than commercial nano particles, even with smaller specific surface area. The possible reason can be attributed to the synergistic effect of high crystallinity and the exposed facets formed by polyhedral structure.

Key words: CuO, polyhedral, catalyst, nanomaterials

中图分类号:

X703

曾涛, 白杨, 李浩, 姚伟峰, 董显林. 熔盐法制备纳米多面体结构氧化铜及其催化性能研究[J]. 无机材料学报, 2015, 30(4): 439-442.

ZENG Tao, BAI Yang, LI Hao, YAO Wei-Feng, DONG Xian-Lin. Preparation of Polyhedral Copper Oxide Nanoparticles by Molten-salt
Method and Their Catalytic Performance[J]. Journal of Inorganic Materials, 2015, 30(4): 439-442.

图/表 5

Fig. 1 XRD patterns of the as-prepared CuO nanomaterials calcined at 650℃ (a), 550℃ (b), 450℃ (c) and the standard XRD pattern of monoclinic phase CuO (d)

Fig. 2 SEM images of CuO nanostructures calcined at different temperatures

Fig. 3 Normalized concentration of RhB (a) and logarithm of normalized concentration of RhB (b) at different reaction time

Table 1 Specific surface areas of different CuO nanomaterials, rate constants and surface area normalized rate constants in the oxidation of RhB when these CuO nanomaterials used as catalysts

Sample	Commercial CuO	CuO (450℃)	CuO (550℃)	CuO (650℃)
Rate contant/min^-1	0.0039	0.0240	0.0176	0.0113
Specific surface area/(m²•g^-1)	10.658	4.336	2.589	1.943
Surface area normalized rate constant/(min^-1•m^-2)	0.018	0.277	0.340	0.291

Fig. 4 The degradation efficiencies of RhB by different photocatalysts

参考文献 8

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熔盐法制备纳米多面体结构氧化铜及其催化性能研究

Preparation of Polyhedral Copper Oxide Nanoparticles by Molten-salt
Method and Their Catalytic Performance

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熔盐法制备纳米多面体结构氧化铜及其催化性能研究

Preparation of Polyhedral Copper Oxide Nanoparticles by Molten-saltMethod and Their Catalytic Performance

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Preparation of Polyhedral Copper Oxide Nanoparticles by Molten-salt
Method and Their Catalytic Performance