One Step Synthesis of Tetragonal-CuBi2O4/Amorphous-BiFeO3Heterojunction with Improved Charge Separation and Enhanced Photocatalytic Properties
One Step Synthesis of Tetragonal-CuBi2O4/Amorphous-BiFeO3Heterojunction with Improved Charge Separation and Enhanced Photocatalytic Properties
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一步合成四方-CuBi2O4/非晶-BiFeO3异质结，改善电荷分离并增强光催化性能
DOI：
10.3390/nano10081514
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发表时间：
2020-08-01
期刊：
影响因子：
5.3
通讯作者：
Wang, Fuxian
中科院分区：
文献类型：
--
作者：
Cai, Fang;Zhang, Ting;Wang, Fuxian
采用一步溶剂热法在温和条件下制备了四元CuBi 2 O 4/非晶BiFeO 3（T-CBO/A-BFO）复合材料。T-CBO/A-BFO复合材料显示出比单独的T-CBO或A-BFO更大的可见光吸收，抑制了电荷复合，从而提高了光催化活性。当T-CBO与A-BFO的最佳比例为1：1时，T-CBO/A-BFO表现出最低的光致发光信号和最高的光催化活性。在可见光照射下，降解亚甲基橙子1 h，去除率为78.3%.循环试验后的XPS测试揭示了光催化反应过程中Bi（3+）的还原。此外，所制备的T-CBO/A-BFO显示出比它们的煅烧对应物更高的光催化活性。一步合成在30分钟内完成，并且不需要后退火过程，这可以容易地应用于快速和成本有效地制备光活性金属氧化物异质结。
Tetragonal CuBi2O4/amorphous BiFeO3(T-CBO/A-BFO) composites are prepared via a one-step solvothermal method at mild conditions. The T-CBO/A-BFO composites show expanded visible light absorption, suppressed charge recombination, and consequently improved photocatalytic activity than T-CBO or A-BFO alone. The T-CBO/A-BFO with an optimal T-CBO to A-BFO ratio of 1:1 demonstrates the lowest photoluminescence signal and highest photocatalytic activity. It shows a removal rate of 78.3% for the photodegradation of methylene orange under visible light irradiation for 1 h. XPS test after the cycle test revealed the reduction of Bi(3+)during the photocatalytic reaction. Moreover, the as prepared T-CBO/A-BFO show fundamentally higher photocatalytic activity than their calcinated counterparts. The one-step synthesis is completed within 30 min and does not require post annealing process, which may be easily applied for the fast and cost-effective preparation of photoactive metal oxide heterojunctions.