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HİDROTERMAL YÖNTEM İLE BAKIR HİDROKSİ NİTRATIN SENTEZ VE KARAKTERİZASYONU

SYNTHESIS AND CHARACTERIZATION OF COPPER HYDROXYNITRATE AND COPPER OXIDE BY HYDROTHERMAL METHOD

Journal Name:

  • Journal of The Turkish Chemical Society, Section B: Chemical Engineering

Publication Year:

  • 2016

Key Words:

Keywords (Original Language):

Author NameUniversity of Author
Abstract (2. Language): 
In this study, copper hydroxynitrate (Cu2(OH)3NO3) and copper oxide (CuO) were synthesized by using the reactants Cu(NO3)2.3H2O and Na2B4O7.10H2O with the addition of SB12 surfactant by hydrothermal method. The prepared samples were characterized by X-ray diffraction (XRD), Thermal gravimetric analysis (TGA), Fourier Transform Infrared (FTIR) spectra, and scanning electron microscopy (SEM) techniques. According to X-ray diffraction results, copper hydroxynitrate was obtained by borax hydrolysis. Then, the monoclinic phase of copper oxide by calcination of Cu2(OH)3NO3 at 400 oC was obtained. TG-DTA analysis showed single stage weight loss. The weight loss of 33.27% at 350°C represents a simultaneous dissociation of HNO3 and H2O. The FTIR analysis indicates the samples have O-H, O-NO2, N-O and Cu-OH group bands. The SEM results reveal that the copper hydroxynitrate have micrometer-size elongated hexagonal plates.
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Abstract (Original Language): 
Yapılan çalışmada, hidrotermal yöntemle bakır nitrat Cu(NO3)2.3H2O ve boraks (Na2B4O7.10H2O) başlangıç maddeleri ile SB12 surfaktanı kullanılarak bakır hidroksi nitrat (Cu2(OH)3NO3) ve bakır oksit (CuO) sentezlenmiş ve elde edilen ürünler XRD, FTIR, TG ve SEM teknikleri ile karakterize edilmiştir. XRD sonuçlarına göre, 180 ºC’de hidrotermal yöntemle elde edilen örneklerin monoklinik bakır hidroksi nitrat (Cu2(OH)3NO3) oluştuğu ve 400ºC’de kalsinasyonu sonucunda tamamen bakır oksit (CuO)’e dönüştüğü görülmektedir. Elde edilen bakır hidroksi nitratların TG analiz sonuçlarına bakıldığında sentezlenen ürünün HNO3 ve H2O’un eş zamanlı ayrışmasından meydana geldiği görülmektedir. Sentezlenen ürünün FTIR analizlerinde O-H, O-NO2, N-O ve Cu-OH gruplarının bantları tespit edilmiştir. SEM analizi sonuçlarından, SB12 surfaktan ortamında altıgen plaka şeklinde nano/mikro yapıda partiküllerden oluştuğu görülmektedir.
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