ZnO1−x/carbon dots composite hollow spheres: Facile aerosol synthesis and superior CO2 photoreduction under UV, visible and near-infrared irradiation

Lin, Liang-Yi; Kavadiya, Shalinee; Karakoçak, Bedia Begüm; Nie, Yao; Raliya, Ramesh; Wang, Steven T.; Berezin, Mikhail Y.

doi:10.1016/j.apcatb.2018.02.018

Cited by 68 publications

(31 citation statements)

References 61 publications

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“…Very high absorbance can be observed in the UV range (200-400 nm), however, for wavelengths higher than 400 nm, remarkable increasing in the absorbance may be observed with increasing oxygen vacancies. This behavior is probably due to the creation of energy levels between the valence and conduction bands, facilitating the transition of the electrons between the two bands, which then makes it possible to absorb more light [55,56]. We have calculated the band gap by using the following Tauc relationship:…”

Section: -1 Xrd and Sem Characterizationsmentioning

confidence: 99%

High performances room temperature NO2 gas sensor based on ZnO nanoparticles with oxygen vacancies prepared by auto combustion method

Benamara¹,

Dahman²,

Massoudi³

et al. 2021

Preprint

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Pure zinc oxide was prepared by an auto-combustion method and oxygen vacancies were created by means of a thermally activated process as it is based on a vacuum treatment. XRD, XPS and SEM characterizations were used to determine the structure and morphology of pure and treated ZnO1 − X with x equal to 0, 0.05 and 0.10. Optical measurement was investigated in the UV-Visible range and indicated that oxygen vacancies enhance absorption in the visible range. Gas sensors were prepared by spraying the solution of ZnO1 − X nanoparticles on alumina substrates with pre-deposited gold interdigitated electrodes. The fabricated sensors exhibited exceptional sensing responses to 0.5 ppm of NO2 at room temperature and under white light illumination. The sensing tests outline an enhancement in sensors performances due to the presence of oxygen vacancies. The best response was 76, with 1.5 min and 2.7 min as response and recovery times respectively, obtained with sensor based on ZnO0.90 nanoparticles having the higher oxygen vacancy concentration, confirmed by XPS measurements and the lowest grain size and higher absorption in the visible range.

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Section: -1 Xrd and Sem Characterizationsmentioning

confidence: 99%

High performances room temperature NO2 gas sensor based on ZnO nanoparticles with oxygen vacancies prepared by auto combustion method

Benamara¹,

Dahman²,

Massoudi³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…36 It should be noted that all, solution, film deposition, cell fabrication and the testing in this research were performed under air with a relative humidity (RH) of ≈60%, whereas most of reported SnO 2 -based ETLs are either partially or fully fabricated/tested in a glove box with a controlled RH, 7,26,37 and/or fabrication in ambient condition resulting in low cell performance. 38 Table S1 is provided as a mini review listing the recent development of SnO 2 -based ETL for planar PSC. A TiO 2 -based PSC is also considered in the table to show the importance of the RH in the performance of the cell.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, this method can solve the restacking issue of GO nanosheets upon the introduction of the solvent due to strong π–π interaction, which can reduce the accessible surface area and consequently affect the efficacy of material in various applications 36 . It should be noted that all, solution, film deposition, cell fabrication and the testing in this research were performed under air with a relative humidity (RH) of ≈60%, whereas most of reported SnO 2 ‐based ETLs are either partially or fully fabricated/tested in a glove box with a controlled RH, 7,26,37 and/or fabrication in ambient condition resulting in low cell performance 38 . Table S1 is provided as a mini review listing the recent development of SnO 2 ‐based ETL for planar PSC.…”

Section: Introductionmentioning

confidence: 99%

Performance enhancement of low temperature processed tin oxide as an electron transport layer for perovskite solar cells under ambient conditions

2020

Self Cite

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Most of the SnO 2-based perovskite cells (PSC) are either fabricated in a controlled environment or have low energy conversion efficiencies. In this research, we used a low-temperature processed SnO 2 as an electron transport layer (ETL) and fabricated planar PSC via a spin coating technique under ambient condition. By adjusting the concentration of SnO 2 precursor solution, the efficiency of PSC was enhanced from 4% to 9%. Furthermore, different weight ratios of 3D-structured crumpled graphene oxide (CGO), which was synthesized using a one-step furnace aerosol reactor, were introduced into the SnO 2 ETL to improve the PSC performance. The 0.25% CGO ratio resulted in a cell with highest J sc of 21 mA/cm 2 and the efficiency of 11%. Photoluminescence measurements also showed the benefit of doping SnO 2 layer with CGO in charge transfer in the ETL and from the perovskite layer suppressing carrier recombination. The SnO 2-based ETL with the presence of CGO can be a promising ETL for low-cost planar PSCs as well as tandem cells, fabricated under ambient condition.

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“…TiO 2 , ZnO, etc.) are considered as a promising class of materials due to their low density, high chemical stability and conductivity . Recently, using metal‐organic‐frameworks (MOFs) as templates for preparing carbon hybrids have attracted considerable interest , .…”

Section: Introductionmentioning

confidence: 99%

Hollow Au‐ZnO/CN Nanocages Derived from ZIF‐8 for Efficient Visible‐Light‐Driven Hydrogen Evolution from Formaldehyde Alkaline Solution

Yang

Zhang

et al. 2019

Eur J Inorg Chem

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Hollow carbon nanostructured materials incorporating metals or metal oxides have attracted considerable interest in photocatalysis. Herein, novel hollow N-doped carbon nanocages incorporating Au and ZnO nanoparticles derived from ZIF-8 were successfully synthesized. Firstly, ZIF-8 nanocrystals were treated with chloroauric acid solution (HAuCl 4 ) to produce hollow Au X @ZIF-8 cubes through acid etching of cores and cation exchange. Then, the Au X @ZIF-8 cubes were used as precursors to obtain Au X -ZnO/CN after pyrolysis in a N 2 atmosphere. The resulting Au 0.40 -ZnO/CN had a uniform hollow structure with ≈ 30 nm shells conformal to ZIF-8 dimension while incor- [a]

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ZnO1−x/carbon dots composite hollow spheres: Facile aerosol synthesis and superior CO2 photoreduction under UV, visible and near-infrared irradiation

Cited by 68 publications

References 61 publications

High performances room temperature NO2 gas sensor based on ZnO nanoparticles with oxygen vacancies prepared by auto combustion method

High performances room temperature NO2 gas sensor based on ZnO nanoparticles with oxygen vacancies prepared by auto combustion method

Performance enhancement of low temperature processed tin oxide as an electron transport layer for perovskite solar cells under ambient conditions

Hollow Au‐ZnO/CN Nanocages Derived from ZIF‐8 for Efficient Visible‐Light‐Driven Hydrogen Evolution from Formaldehyde Alkaline Solution

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