Liu Dongni, Chen Dongyun, Li Najun, Xu Qingfeng, Li Hua, He Jinghui, Lu Jianmei
Collaborative Innovation Center of Suzhou Nano Science and Technology, College of Chemistry Chemical Engineering and Materials Science Soochow University, 199 Ren'ai Road, Suzhou, 215123, P. R. China.
Small. 2019 Aug;15(31):e1902291. doi: 10.1002/smll.201902291. Epub 2019 Jun 13.
ZIF-67-derived 3D hollow mesoporous crystalline Co O wrapped by 2D graphitic carbon nitride (g-C N ) nanosheets are prepared by low temperature annealing, and are used for the photocatalytic oxidation of nitric oxide (NO) at a concentration of 600 ppb. The p-n heterojunction between Co O and g-C N forms a spatial conductive network frame and results in a broad visible light response range. The hollow mesoporous structure of Co O contributes to the circulation and adsorption of NO, and the large specific surface area exposes abundant active sites for the reaction of active species. A maximum NO degradation efficiency of 57% is achieved by adjusting the mass of the Co O precursor. Cycling tests and X-ray diffraction indicate the high stability and recyclability of the composite, making it promising in environmental purification applications.
通过低温退火制备了由二维石墨相氮化碳（g-C₃N₄）纳米片包裹的ZIF-67衍生的三维中空介孔晶体Co₃O₄，并将其用于光催化氧化浓度为600 ppb的一氧化氮（NO）。Co₃O₄与g-C₃N₄之间的p-n异质结形成了空间导电网络框架，导致可见光响应范围变宽。Co₃O₄的中空介孔结构有助于NO的循环和吸附，并且大比表面积暴露出丰富的活性位点用于活性物种的反应。通过调整Co₃O₄前驱体的质量，实现了57%的最大NO降解效率。循环测试和X射线衍射表明该复合材料具有高稳定性和可回收性，使其在环境净化应用中具有广阔前景。
