A series of CuxO self-assembled mesoporous microspheres （SMMs）, with different and controlled mor- phology （virus-like, urchin-like, spherical）, were synthesized by facile liquid phase approach. The morphology of ...A series of CuxO self-assembled mesoporous microspheres （SMMs）, with different and controlled mor- phology （virus-like, urchin-like, spherical）, were synthesized by facile liquid phase approach. The morphology of the as- prepared CuxO SMMs was evolved from spherical to virus-like shape by controlling the ratio of DI water in solution. It can also realize the transformation from loose assembly to dense assembly by extending the reaction time. These CuxO SMMs exhibited good response to NO2 gas at room temperature, benefiting from their 3D self-assembly structure. Among these the resulting virus-like CuxO SNMMs-based sensor exhibits largely enhanced response to 1 ppm NO2 gas at room temperature. The enhanced response of the virus-like Cn2O SMMs-based sensor can be ascribed to the high surface area, hier- archical 3D nanostructures, micropores for effective gas diffusion, the heterojunctions formed between CuO and Cu2O, and the existence of abundant surface oxygen vacancies.展开更多
基金supported by the National Natural Science Foundation(51501010,91323301,51631001,51372025 and21643003)
文摘A series of CuxO self-assembled mesoporous microspheres （SMMs）, with different and controlled mor- phology （virus-like, urchin-like, spherical）, were synthesized by facile liquid phase approach. The morphology of the as- prepared CuxO SMMs was evolved from spherical to virus-like shape by controlling the ratio of DI water in solution. It can also realize the transformation from loose assembly to dense assembly by extending the reaction time. These CuxO SMMs exhibited good response to NO2 gas at room temperature, benefiting from their 3D self-assembly structure. Among these the resulting virus-like CuxO SNMMs-based sensor exhibits largely enhanced response to 1 ppm NO2 gas at room temperature. The enhanced response of the virus-like Cn2O SMMs-based sensor can be ascribed to the high surface area, hier- archical 3D nanostructures, micropores for effective gas diffusion, the heterojunctions formed between CuO and Cu2O, and the existence of abundant surface oxygen vacancies.
