Design and fabrication of ternary BiVO4/FeVO4/Cu2O nanorod array photoelectrode for boosting photoelectrochemical water oxidation
Design and fabrication of ternary BiVO4/FeVO4/Cu2O nanorod array photoelectrode for boosting photoelectrochemical water oxidation
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DOI：
10.1016/j.ceramint.2021.11.305
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发表时间：
2021-11
影响因子：
5.2
通讯作者：
Sitong Liu;Wenzhong Wang;Ying Cheng;Lizhen Yao;Yuhong Liu;Ming-Nung Lin;Huabin Chen;Yujie Liang;Junli Fu;Lijuan Wang
中科院分区：
文献类型：
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作者：
Sitong Liu;Wenzhong Wang;Ying Cheng;Lizhen Yao;Yuhong Liu;Ming-Nung Lin;Huabin Chen;Yujie Liang;Junli Fu;Lijuan Wang
在这项研究中，我们首次通过种子辅助回流、水热和连续离子层吸附和反应（SILAR）方法构建了BiVO4/FeVO4/Cu2O三元纳米棒阵列（NRA）光电极及其光电化学（PEC）水氧化性能。BiVO4、FeVO4和Cu2O的能带结构表明，在构建的BiVO4/FeVO4/Cu2O三元NRA光电极中形成了两个阶梯状的ii型能带排列，使光电极的PEC性能得到了显著提高。负载优化后的Cu2O纳米粒子的三元光电极的零偏置光电流密度为50 μA cm−2，是纯BiVO4NRA光电极的5倍。光学性质的测量表明，构建的BiVO4/FeVO4/Cu2O纳米棒阵列（NRAs）具有更好的光吸收能力。电化学阻抗和光致发光测试证实了BiVO4/FeVO4/Cu2O异质结NRAs的载流子有效转移和分离。构建的三元BiVO4/FeVO4/Cu2O异质结NRA光电极的PEC水氧化活性显著提高，归因于改进的光收集和有效的电荷分离。
In this study, we demonstrate for the first time the construction of a ternary BiVO4/FeVO4/Cu2O nanorod array (NRA) photoelectrode via seed-assisted refluxing, hydrothermal and successive ionic-layer adsorption and reaction (SILAR) method and its photoelectrochemical (PEC) water oxidation performance. The energy band structures of the BiVO4, FeVO4and Cu2O show that two type-II band alignments with a ladder-like structure are formed in the constructed ternary BiVO4/FeVO4/Cu2O NRA photoelectrode, enabling the photoelectrode to display substantially enhanced PEC performance. The constructed ternary photoelectrode loaded with the optimized Cu2O nanoparticles achieves a zero-bias photocurrent density of 50 μA cm−2, 5 times higher than that of the pure BiVO4NRA photoelectrode. The measurements of optical property reveal that the constructed BiVO4/FeVO4/Cu2O nanorod arrays (NRAs) demonstrate improved light absorption capability. The electrochemical impedance and photoluminescence measurements confirm that the charge carriers of the BiVO4/FeVO4/Cu2O heterojunction NRAs are transferred and separated effectively. The substantially boosted PEC water oxidation activity of the constructed ternary BiVO4/FeVO4/Cu2O heterojunction NRA photoelectrode is ascribed to the improved light harvesting and effective charge separation.