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Novel copper sulfide (CuS) hollow spheres composed of nanoflakes were synthesized under hydrothermal conditions by treating copper (II)–thiourea complex from CuSO 4 ·5H 2 O and thiourea at 180°C for 24h. When increasing the reaction temperature, much smaller hexagonal CuS nanoflakes generated from copper (II)–thiourea complex formed and self-assembled into hollow spheres. The products...
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