3D rod-like copper oxide with nanowire hierarchical structure: Ultrasound assisted synthesis from Cu2(OH)3NO3 precursor,optical properties and formation mechanism |
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| Institution: | 1. Aragón Institute of Engineering Research (I3A), Department of Chemical and Environmental Engineering, University of Zaragoza, Zaragoza 50018, Spain;2. Facultad de Ciencias de la Ingeniería, Universidad Tecnológica Equinoccial, Quito, Ecuador;1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, PR China;2. Centre for Renewable Energy, School of Engineering, Cranfield University, Cranfield, Bedfordshire MK43 0AL, England, United Kingdom;1. University of Minnesota, School of Physics and Astronomy, Minneapolis, MN 55455, USA;2. William I. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, MN 55455, USA;3. Departamento de Ciencias, Facultad de Artes Liberales, Universidad Adolfo Ibáñez, Santiago 7941169, Chile;4. Centro de Estudios Científicos (CECs), Casilla 1469, Valdivia, Chile;1. Center of Excellence for Innovation in Chemistry (PERCH-CIC), Department of Chemistry, Faculty of Science, Rama VI Rd, Rajathewi, Bangkok 10400, Thailand;2. Materials Science and Engineering Program, Faculty of Science, Mahidol University, 999 Phuttamonthon Sai 4 Rd, Salaya, Nakhon Pathom 73170, Thailand;3. Center of Sustainable Energy and Green Materials, Department of Chemistry, Mahidol University, 999 Phuttamonthon Sai 4 Rd, Salaya, Nakhon Pathom 73170, Thailand |
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| Abstract: | 3-dimensional (3D) rod-like CuO with nanowire hierarchical structure has been synthesized successfully by a facile ultrasound assisted method combined with thermal conversion, using rouaite Cu2(OH)3NO3 as the precursor. The product was characterized by XRD, SEM, TEM, HRTEM and FT-IR spectrum. Its optical properties were studied by means of UV–Vis diffuse reflectance absorption spectroscopy and photoluminescence (PL) spectrum. Series of control experiments have been performed to explore influencing factors to the product morphologies and a possible formation mechanism has been proposed. The results show that each CuO rod assembled by tens of nanowires is 200–300 nm in diameter and about 1000 nm in length. Each nanowire contains many interconnected nanoparticles with sizes of about 15 nm. Particularly, ultrasound processing was found beneficial to the formation of the 3D rod-like CuO with nanowire hierarchical structure. |
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| Keywords: | CuO microrod Ultrasound processing Morphology Optical properties |
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