Zn0.5Cd0.5S nanoparticles modified TiO2 nanotube arrays with efficient charge separation and enhanced light harvesting for boosting visible-light-driven photoelectrochemical performance
Zn0.5Cd0.5S nanoparticles modified TiO2 nanotube arrays with efficient charge separation and enhanced light harvesting for boosting visible-light-driven photoelectrochemical performance
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Zn0.5Cd0.5S 纳米粒子修饰的 TiO2 纳米管阵列具有高效的电荷分离和增强的光捕获能力,可提高可见光驱动的光电化学性能
DOI:
10.1016/j.jpowsour.2020.228956
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发表时间:
2021-01
影响因子:
9.2
通讯作者:
Fan Mingming
中科院分区:
文献类型:
--
作者:
Cao Ling;Xu Kangli;Fan Mingming
Vertically aligned TiO2nanotube arrays (TiO2NTAs) modified with uniformly dispersed Zn0.5Cd0.5S (ZCS) nanoparticles as novel heterojunction photoanodes have been prepared for the first time through a typical two-step anodization followed by successive ionic layer adsorption and reaction (SILAR) process. The photoelectrochemical (PEC) performance of ZCS nanoparticles modified TiO2NTAs (TiO2NTAs/ZCS) photoanodes strongly depends on the loading amount of ZCS. By optimizing the amount of ZCS in TiO2NTAs/ZCS photoanodes, the highest photocurrent density of 10.95 mA cm−2at 1.23 V vs. reversible hydrogen electrode (RHE) under visible-light illumination is obtained. The optimum photoconversion efficiency is up to 4.54% at 0.49 V vs. RHE, while it is only 0.04% at 0.67 V vs. RHE for bare TiO2NTAs photoanode. The maximum incident photon-to-current efficiency (IPCE) value in TiO2NTAs/ZCS photoanodes is 65.0% at 390 nm, which is 2.3-fold as high as that of bare TiO2NTAs photoanode (28.1% at 340 nm). The formed heterostructure structure between TiO2NTAs and ZCS possesses a typical type-II band alignment, which is beneficial to drastically promote the improvement of PEC performance due to the efficient charge separation and increased light harvesting.
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影响因子:
6.7
作者:
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影响因子:
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10.1039/c5cp01580d
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期刊:
Physical chemistry chemical physics : PCCP
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