Synthesis and optical properties of coil-ball-like CaMoO4 hierarchical architectures
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Coil-ball-like CaMoO4 hierarchical architectures were fabricated via a simple solvothermal route. The structures and compositions of the as-prepared samples were characterized using X-ray powder diffraction, scanning electron microscopy, UV–vis spectrophotometer and Brunauer–Emmett–Teller. A series of experiments of reaction conditions including reaction time and the amount of N,N-dimethylacetamide (DMAc) were carefully carried out. The results showed that the amount of DMAc played a key role in the morphology of the products and the formation of the coil-ball-like CaMoO4 hierarchical architectures was governed by an oriented aggregation, assembly and Ostwald ripening mechanism. The photoluminescence (PL) properties of the as-synthesized CaMoO4 samples at different time intervals were investigated. The results revealed that all samples exhibit a broad emission peak in the visible region (390–600 nm) with 300 nm excitation wavelength at room temperature, but show different PL intensity.
This research was jointly sponsored by the Shanghai Municipal Natural Science Foundation (Grant No. 18ZR1415700), the Guangxi Key Laboratory of Information Materials (GUET) (Grant No. 171011-K), the Leap Project and Postgraduate fund (SSPU) (Grant Nos. EGD18XQD26, EGD18YJ0049 and EGD17YJ0005), the key subject of SSPU (Grant No. Material Science and Engineering, XXKZD1601), and the Gaoyuan Discipline of Shanghai–Environmental Science and Engineering (Resource Recycling Science and Engineering).