Full
Outline
Amoxicillin （AMX） exhibits good chemical stability but low biodegradability. To address the water pollution problem caused by AMX，hollow-structured Fe3O4@mesoporous TiO2（FT） photoelectrocatalytic materials are prepared，and the visible-light photoelectrocatalytic degradation of AMX wastewater is investigated. Characterizations show that FT consists of spherical particles with an average particle size of 400 nm，possessing a typical mesoporous structure，anatase TiO₂ crystal phase，and good magnetic responsiveness （saturation magnetization of 24.90 emu·g-1）. It can be efficiently separated by an external magnetic field and uniformly redispersed after ultrasonic treatment. Electrochemical test results indicate that the electroactive surface area of ITO+FT reaches 2.39±0.01 cm²，which is significantly larger than that of ITO and ITO+FST. Meanwhile，ITO+FT has lower charge transfer resistance and higher photogenerated electron-hole separation efficiency. Visible-light photoelectrocatalytic degradation experiments of AMX show that the degradation rate of the FT photoelectrode reaches 88.1% within 60 min and increases to 98.3% at 100 min. After 8 cycles，the degradation rate remains above 89%，demonstrating excellent stability. Active species trapping experiments confirm that ·OH and h⁺ are the key active species in the reaction. Combined with the confined catalytic effect of the hollow structure of FT，the photoelectrocatalytic degradation mechanism is proposed. This study demonstrates good feasibility in destroying the molecular structure of AMX，so it can serve as an effective pretreatment method for AMX wastewater and provides a new type of recyclable photoelectrocatalytic material and technical scheme for the efficient pretreatment of AMX wastewater.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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