Mesoporous sphere-like Cu₂O with a high specific surface area (187.2 m² g⁻¹) was prepared using CuSO₄ as a precursor and sodium ascorbate as a reducing agent, without any surfactants, for the first time. The prepared sample was characterized by scanning electron microscopy, transmission electron microscopy, powder X-ray diffraction, elemental analysis, X-ray photoelectron spectroscopy, and nitrogen adsorption–desorption measurements. Our mesoporous sphere-like Cu₂O gave a good photocatalytic performance in the degradation of Congo red under visible-light irradiation and an excellent CO-sensing response, with a limit of detection of 19 ppb. The enhanced photocatalytic activity was attributed to increased light absorption and effective charge separation as a result of the unique Cu₂O structure. The enhanced response to CO is attributed to the unique structure and large surface area of the Cu₂O, which greatly increase the number of adsorption sites for ionized oxygen species and enhance the reaction rate between CO molecules and the Cu₂O surface.

介孔球状的Cu ₂ ö具有高比表面积（187.2米² 克^-1），使用硫酸铜制备₄作为前体和抗坏血酸钠作为还原剂，没有任何表面活性剂，为第一次。通过扫描电子显微镜，透射电子显微镜，粉末X射线衍射，元素分析，X射线光电子能谱和氮吸附-解吸测量来表征所制备的样品。我们的介孔球状Cu ₂O在可见光照射下对刚果红的降解具有良好的光催化性能，并具有出色的CO感测响应，检出限为19 ppb。由于独特的Cu ₂ O结构，增强的光催化活性归因于增加的光吸收和有效的电荷分离。对CO的增强响应归因于Cu ₂ O的独特结构和较大的表面积，这大大增加了离子化氧物种的吸附位点数量，并提高了CO分子与Cu ₂ O表面之间的反应速率。