A simple chemical solution synthesis of nanowire-assembled hierarchical CuO microspheres with enhanced photochemical properties

作者：Li, Li; Zhang, Yongxing^*; Li, Jia; Ma, Dong; Li, Dechuan; Zhu, Guangping; Tang, Huijie; Li, Xuanhua^*

来源：Dalton Transactions, 2018, 47(42): 15009-15016.

DOI：10.1039/c8dt02931h

• PHOTOCATALYTIC CO2 REDUCTION
• HOLE TRANSPORT MATERIALS
• HYDROGEN-PRODUCTION
• HYBRID STRUCTURES
• GROWTH-MECHANISM
• FACILE SYNTHESIS
• NANOPARTICLES
• DEGRADATION
• EVOLUTION
• WATER

Hierarchical micro/nanostructures manifest attractive prospects for photocatalytic application. Nevertheless, large-scale hierarchical micro/nanostructures for industrial application with facile, low-cost and eco-friendly routes remain difficult. Herein, nanowire-assembled hierarchical CuO microspheres (HCMAW) are synthesized for the first time by CO32- ions induced synthesis route. The time-dependent SEM images reveal that the growth mechanism for HCMAW is the well-known Ostwald ripening with self-assembly. The specific surface area of the HCMAW is 7.265 m(2) g(-1), which is higher than that of hierarchical CuO microspheres assembled with nanosheets (HCMAS) (4.952 m(2) g(-1)) prepared by direct self-assembly scheme without the introduction of CO32- ions. Meanwhile, the HCMAW possess strong light absorption around a broadband wavelength from 300 nm to 800 nm. As a result, the photodegradation activity test demonstrates that the HCMAW shows the degradation efficiency of 98.8% for rhodamine B (RhB) under white light irradiation for 30 min in the presence of H2O2 higher than those of HCMAS (66.3%) and commercial CuO (48.3%) under the same condition, which is one of the highest reported till date related to CuO nanomaterials for the degradation of RhB. The novel HCMAW synthesized by the ion-induced protocol is worth being generalized to more assembled hierarchical micro/nanostructures for versatile applications.

• 出版日期2018-11-14
• 单位淮北师范大学; 西北工业大学