Optimized photoreduction of CO2 exclusively into methanol utilizing liberated reaction space in layered double hydroxides comprising zinc, copper, and gallium

Wein, Lukas Anton; Zhang, Hongwei; Urushidate, Kazuki; Miyano, Masaya; Izumi, Yasuo

doi:10.1016/j.apsusc.2018.04.046

Cited by 23 publications

(7 citation statements)

References 31 publications

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“…Hence, additional metal co-doping strategies can be applied to enhance the performance of Mo 2 C/TiO 2 blends, decreasing the bandgap energy of the material and increasing the presence of actives sites for CO 2 photoactivation and conversion. Previous reports show how copper (Cu)-derived catalysts (e. g., oxide-derived Cu) can be effective and selective for the conversion of CO 2 to CH 3 OH in both electrochemical [4,7,[25][26][27] and photochemical strategies [13,[28][29][30]. In the latter approach, the combination of TiO 2 and Cu-derived materials involves favourable reaction mechanisms for the selective production of CH 3 OH, thereby facilitating the overall photoreduction performance [13,31].…”

Section: Introductionmentioning

confidence: 99%

An optofluidic planar microreactor with photoactive Cu2O/Mo2C/TiO2 heterostructures for enhanced visible light-driven CO2 conversion to methanol

Merino-Garcia

Garcı́a

Hernández

et al. 2023

Journal of CO2 Utilization

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Section: Introductionmentioning

confidence: 99%

An optofluidic planar microreactor with photoactive Cu2O/Mo2C/TiO2 heterostructures for enhanced visible light-driven CO2 conversion to methanol

Merino-Garcia

Garcı́a

Hernández

et al. 2023

Journal of CO2 Utilization

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“…Isotope-labeled photoreaction tests were monitored using gas chromatography–mass spectrometer (Model JMS-Q1050GC, JEOL) . Helium (purity >99.9999%) was used as the carrier gas.…”

Section: Methodsmentioning

confidence: 99%

“…A photocatalyst sample (0.135 g, Table a–f) was placed in a quartz photoreactor and evaluated at 295 K for 2 h at 10 –6 Pa. ,− Then, 18 O 2 photoexchange (0.55 kPa; 18 O 97.8%, chemical purity > 99.9%, Cambridge Isotope Laboratories, Inc.) with the photocatalyst was monitored at 295 K under irradiation by UV–visible light from a 500 W xenon arc lamp (Model SX-UID502XAM, Ushio). The distance between the exit of the lamp window and the photocatalyst was 160 mm.…”

Section: Methodsmentioning

confidence: 99%

Solar Cell with Photocatalyst Layers on Both the Anode and Cathode Providing an Electromotive Force of Two Volts per Cell

Urushidate

Matsuzawa

Nakatani

et al. 2018

ACS Sustainable Chem. Eng.

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Solar cells and fuel cells are essential devices that convert sustainable energy into electricity. However, the electromotive forces they provide are in principle limited to less than 1 V, and consequently, they need to be connected in series for practical use. In this study, photocatalyst layers with thicknesses of 0.8–2.1 μm were applied to both electrodes. The primary particle size of TiO2 was optimized (15–21 nm), and its performance was further improved by doping with organic dyes, e.g., anthocyanins. The electron conductivity of TiO2 was found to be a primary factor in the performance of the cells, but the film flatness also reduced resistance and improved cell performance. Interestingly, the efficiency of TiO2 could be evaluated based on the exchangeable surface O atoms via its 18O2 exchange tests to suppress the reverse reaction step in water photo-oxidation, which occurs on the anode. UV and visible light were absorbed by TiO2 and the organic dyes, respectively, creating an electron flow path from the valence band to the conduction band of TiO2, then, the highest occupied molecular orbital (HOMO) to the lowest unoccupied molecular orbital (LUMO) of the organic dyes, then the anode, and finally the cathode via the external circuit. The flow of electrons and holes (separated from electrons in BiOCl on the cathode by UV–visible light) enabled a V OC value of 2.11 V and maximum power of 73.1 μW cm–2.

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“…In their reports, they observed that the reduction cascade led to the selective production of CO under UV-light irradiation. A highly selective compound for CO2 photoreduction into methanol employed ZnCuGa-CO3 LDHs [148]. In the paper, the photocatalytic material was required to be heated at 150 °C in vacuum in order to reduce the content of interlayer water by 31%; after this stage, if LDHs never got in contact with air prior to the photoreduction tests, methanol production selectivity was verified to be >97% in all the studied cases.…”

Section: Co2 Conversion/ Reductionmentioning

confidence: 99%

Layered Double Hydroxides: A Toolbox for Chemistry and Biology

et al. 2019

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Layered double hydroxides (LDHs) are an emergent class of biocompatible inorganic lamellar nanomaterials that have attracted significant research interest owing to their high surface-to-volume ratio, the capability to accumulate specific molecules, and the timely release to targets. Their unique properties have been employed for applications in organic catalysis, photocatalysis, sensors, drug delivery, and cell biology. Given the widespread contemporary interest in these topics, time-to-time it urges to review the recent progresses. This review aims to summarize the most recent cutting-edge reports appearing in the last years. It firstly focuses on the application of LDHs as catalysts in relevant chemical reactions and as photocatalysts for organic molecule degradation, water splitting reaction, CO2 conversion, and reduction. Subsequently, the emerging role of these materials in biological applications is discussed, specifically focusing on their use as biosensors, DNA, RNA, and drug delivery, finally elucidating their suitability as contrast agents and for cellular differentiation. Concluding remarks and future prospects deal with future applications of LDHs, encouraging researches in better understanding the fundamental mechanisms involved in catalytic and photocatalytic processes, and the molecular pathways that are activated by the interaction of LDHs with cells in terms of both uptake mechanisms and nanotoxicology effects.

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Optimized photoreduction of CO2 exclusively into methanol utilizing liberated reaction space in layered double hydroxides comprising zinc, copper, and gallium

Cited by 23 publications

References 31 publications

An optofluidic planar microreactor with photoactive Cu2O/Mo2C/TiO2 heterostructures for enhanced visible light-driven CO2 conversion to methanol

An optofluidic planar microreactor with photoactive Cu2O/Mo2C/TiO2 heterostructures for enhanced visible light-driven CO2 conversion to methanol

Solar Cell with Photocatalyst Layers on Both the Anode and Cathode Providing an Electromotive Force of Two Volts per Cell

Layered Double Hydroxides: A Toolbox for Chemistry and Biology

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