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

doi:10.15541/jim20140482

Journal of Inorganic Materials ›› 2015, Vol. 30 ›› Issue (4): 439-442.DOI: 10.15541/jim20140482

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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)

Abstract

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

CLC Number:

X703

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.

Figures/Tables 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

References 8

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

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