Porous BiVO(4)/Boron-Doped Diamond Heterojunction Photoanode with Enhanced Photoelectrochemical Activity.
Porous BiVO(4)/Boron-Doped Diamond Heterojunction Photoanode with Enhanced Photoelectrochemical Activity.
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DOI：
10.3390/molecules27165218
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发表时间：
2022-08-16
期刊：
影响因子：
4.6
通讯作者：
He, Bin
中科院分区：
文献类型：
--
作者：
Huang, Jiangtao;Meng, Aiyun;Zhang, Zongyan;Ma, Guanjie;Long, Yuhao;Li, Xingyu;Han, Peigang;He, Bin
关键词：
构建异质结是提高光电化学（PEC）在水分解和有机污染物降解中性能的一种有吸引力的策略。本文采用磁控溅射法在p型掺硼金刚石（BDD）衬底上制备了一层n型BiVO 4薄膜，成功制备了一种新型的多孔BiVO 4/BDD异质结光阳极。BiVO 4的表面结构可以通过改变沉积时间（Td）来调节。系统地表征和分析了光阳极的形貌、相结构、电子结构和化学组成。当Td为30 min时，在VRHE为1.23时，电流密度为1.8 mA/cm 2时，PEC活性最高，对盐酸四环素的降解率也最高。BiVO 4/BDD超微p-n异质结光电极的形成和BiVO 4的多孔结构使其具有良好的电荷传输效率和较低的载流子复合速率。这些新型光阳极有望在未来的能源再生和环境管理的实际PEC应用。
Constructing heterojunction is an attractive strategy for promoting photoelectrochemical (PEC) performance in water splitting and organic pollutant degradation. Herein, a novel porous BiVO4/Boron-doped Diamond (BiVO4/BDD) heterojunction photoanode containing masses of ultra-micro electrodes was successfully fabricated with an n-type BiVO4 film coated on a p-type BDD substrate by magnetron sputtering (MS). The surface structures of BiVO4 could be adjusted by changing the duration of deposition (Td). The morphologies, phase structures, electronic structures, and chemical compositions of the photoanodes were systematically characterized and analyzed. The best PEC activity with the highest current density of 1.8 mA/cm2 at 1.23 VRHE was achieved when Td was 30 min, and the sample showed the highest degradation efficiency towards tetracycline hydrochloride degradation (TCH) as well. The enhanced PEC performance was ascribed to the excellent charge transport efficiency as well as a lower carrier recombination rate, which benefited from the formation of BiVO4/BDD ultra-micro p-n heterojunction photoelectrodes and the porous structures of BiVO4. These novel photoanodes were expected to be employed in the practical PEC applications of energy regeneration and environmental management in the future.
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