| Autor: |
Jian, Linhan, Li, Ming, Liu, Xinghui, Wang, Guowen, Zhang, Xinxin, Kim, Min Gyu, Fu, Yinghuan, Ma, Hongchao |
| Zdroj: |
Nano Letters; May 2023, Vol. 23 Issue: 9 p3739-3747, 9p |
| Abstrakt: |
The construction of a desirable, environmentally friendly, and cost-effective nanoheterostructure photoanode to treat refractory organics is critical and challenging. Herein, we unveiled a hierarchical dendritic Co3O4–SnO2heterostructure via a sequential hydrothermal process. The time of the secondary hydrothermal process can control the size of the ultrathin SnO2nanosheets on the basis of the Ostwald solidification mass conservation principle. Ti/Co3O4–SnO2-168h with critical growth size demonstrated a photoelectrocatalysis degradation rate of ∼93.3% for a high dye concentrate of 90 mg/L with acceptable long-term cyclability and durability over reported Co3O4-based electrodes because of the large electrochemically active area, low charge transfer resistance, and high photocurrent intensity. To gain insight into the photoelectric synergy, we proposed a type-II heterojunction between Co3O4and SnO2, which prevents photogenerated carriers’ recombination and improves the generation of dominant active species •O2–, 1O2, and h+. This work uncovered the Ti/Co3O4–SnO2-168 as a promising catalyst and provided a simple and inexpensive assembly strategy to obtain binary integrated nanohybrids with targeted functionalities. |
| Databáze: |
Supplemental Index |
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