Enhanced mechanism of the photo-thermochemical cycle based on effective Fe-doping TiO2 films and DFT calculations

Xu, Chenyu; Zhang, Yanwei; Chen, Jingche; Lin, Jiayi; Zhang, Xuhan; Wang, Zhihua; Zhou, Junhu

doi:10.1016/j.apcatb.2016.11.027

Cited by 88 publications

(44 citation statements)

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“…According to previous study, photoexcited EHPs perform as neccessary “fuel” for the photochemical‐step in PTC . As is known, the photoreaction includes the photo excitation of electrons and the separation of photogenerated EHPs.…”

Section: Resultssupporting

confidence: 80%

Enhanced Solar Conversion of CO₂ to CO Using Mn‐doped TiO₂ Based on Photo‐thermochemical Cycle

Deng

Zheng

et al. 2019

ChemistrySelect

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Photo-thermochemical cycle (PTC) is a promising method to converting CO 2 to solar fuels. To study the mechanism of CO 2 reduction based on PTC, sol-gel synthesized titanium dioxide (ST) and Mn-doped TiO 2 (MT) films were produced and applied to the PTC under simulated solar light irradiation. Commercial P25 (PT) was used as a reference. Experiments show that Mndoped TiO 2 produced more CO than undoped TiO 2 and P25. The average CO production of 1.0 wt% MT by the PTC was 32.19 μmol⋅m À 2 ⋅h À 1 ), 4.36 times than that of ST and 3.63 times that of PT. Various characterization methods were conducted to investigated the effect of Mn ions doping on the photoresponse and charge transfer of samples. Density functional theory (DFT) calculations were also performed to verify the analysis and enhance the PTC mechanism. In conclusion, several key factors that Mn ions promote CO 2 conversion have been clarified.[a] B.

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Section: Resultssupporting

confidence: 80%

Enhanced Solar Conversion of CO₂ to CO Using Mn‐doped TiO₂ Based on Photo‐thermochemical Cycle

Deng

Zheng

et al. 2019

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“…对 TiO 2 进行过渡金属掺杂可以增强可见光响应 , 降低电子空穴对复合率 [28,29] . 并且 Zhang 等 [21] 的研究表明一些金属元素(Fe, Cu, …)掺杂的 TiO 2 具有降低表面氧空位形成能的作用.…”

Section: 引言unclassified

Photo-thermochemical Cycle for CO₂ Reduction based on Effective Ni ion Substitute-doped TiO₂

许辰宇¹,

林伽毅²,

潘富强³

et al. 2017

Acta Chim. Sinica

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摘要利用溶胶凝胶法(Sol-gel)制备纯 TiO 2 (ST)及 Ni 掺杂 TiO 2 (NT)纳米薄膜, 将其应用在光热化学循环(PTC)还原 CO 2 中进行机理研究, 并与商用 P25 (PT)进行对比. 结果表明利用 NT 进行 CO 2 还原, 每个循环得到的平均 CO 产率最高为 5.30 μmol/g-cat, 分别是利用 ST 与 PT 得到 CO 产率的 3.13 倍与 2.28 倍. 利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X 射线能量色散谱(EDXS)及 X 射线衍射技术(XRD)研究样品的物质组成、晶体结构与形貌.

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“…However, the modification leads to the photo-response improvement by no more than a few tens of percent. On the other hand, doping TiO 2 by Fe decreases recombination of the photogenerated charge carriers, and provides narrower bandgap [40][41][42], while charge carriers density in Ti-doped hematite is one order of magnitude higher in reference to the pristine [35]. Although the coverage of TiO 2 by Fe 2 O 3 , and doping TiO 2 with Fe, as well as Fe 2 O 3 with Ti, and laser treatment of TiO 2 -NTs lead to the improvement on the electrode performance, the combined approach has not been examined till now.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Laser Re-Solidification on Microstructure and Photo-Electrochemical Properties of Fe-Decorated TiO2 Nanotubes

et al. 2020

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Fossil fuels became increasingly unpleasant energy source due to their negative impact on the environment; thus, attractiveness of renewable, and especially solar energy, is growing worldwide. Among others, the research is focused on smart combination of simple compounds towards formation of the photoactive materials. Following that, our work concerns the optimized manipulation of laser light coupled with the iron sputtering to transform titania that is mostly UV-active, as well as exhibiting poor oxygen evolution reaction to the material responding to solar light, and that can be further used in water splitting process. The preparation route of the material was based on anodization providing well organized system of nanotubes, while magnetron sputtering ensures formation of thin iron films. The last step covering pulsed laser treatment of 355 nm wavelength significantly changes the material morphology and structure, inducing partial melting and formation of oxygen vacancies in the elementary cell. Depending on the applied fluence, anatase, rutile, and hematite phases were recognized in the final product. The formation of a re-solidified layer on the surface of the nanotubes, in which thickness depends on the laser fluence, was shown by microstructure studies. Although a drastic decrement of light absorption was recorded especially in UV range, laser-annealed samples have shown activity under visible light even 20 times higher than bare titania. Electrochemical analysis has shown that the improvement of photoresponse originates mainly from over an order of magnitude higher charge carrier density as revealed by Mott-Schottky analysis. The results show that intense laser light can modulate the semiconductor properties significantly and can be considered as a promising tool towards activation of initially inactive material for the visible light harvesting.

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Enhanced mechanism of the photo-thermochemical cycle based on effective Fe-doping TiO2 films and DFT calculations

Cited by 88 publications

References 46 publications

Enhanced Solar Conversion of CO₂ to CO Using Mn‐doped TiO₂ Based on Photo‐thermochemical Cycle

Enhanced Solar Conversion of CO₂ to CO Using Mn‐doped TiO₂ Based on Photo‐thermochemical Cycle

Photo-thermochemical Cycle for CO₂ Reduction based on Effective Ni ion Substitute-doped TiO₂

The Effect of Laser Re-Solidification on Microstructure and Photo-Electrochemical Properties of Fe-Decorated TiO2 Nanotubes

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Enhanced mechanism of the photo-thermochemical cycle based on effective Fe-doping TiO2 films and DFT calculations

Cited by 88 publications

References 46 publications

Enhanced Solar Conversion of CO2 to CO Using Mn‐doped TiO2 Based on Photo‐thermochemical Cycle

Enhanced Solar Conversion of CO2 to CO Using Mn‐doped TiO2 Based on Photo‐thermochemical Cycle

Photo-thermochemical Cycle for CO2 Reduction based on Effective Ni ion Substitute-doped TiO2

The Effect of Laser Re-Solidification on Microstructure and Photo-Electrochemical Properties of Fe-Decorated TiO2 Nanotubes

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Enhanced Solar Conversion of CO₂ to CO Using Mn‐doped TiO₂ Based on Photo‐thermochemical Cycle

Enhanced Solar Conversion of CO₂ to CO Using Mn‐doped TiO₂ Based on Photo‐thermochemical Cycle

Photo-thermochemical Cycle for CO₂ Reduction based on Effective Ni ion Substitute-doped TiO₂