Improved photostability of a CuO photoelectrode with Ni-doped seed layer

Oh, Jaejin; Ryu, Hyukhyun; Lee, Won–Jae; Bae, Jong‐Sup

doi:10.1016/j.ceramint.2017.09.129

Cited by 36 publications

(8 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the doping Cu 1−x Li x O (x = 0.05), the O-1s peak (I) of O 2− ions is compressed and other remaining peak-II and peak-III are expanded as compared to the pristine sample. [33,45] The reduced area and FWHM of Cu 1−x Li x O (x = 0.05) sample endorsing the fact that copper vacancies are changed after Li doping, and the expansion of peak-II and peak-III in Cu 1−x Li x O (x = 0.05) sample confirm the presence of various oxygen related defect. Additionally, the spectrum showed in Figure 4e exhibit peak at 55.1 eV which relates to the electronic states of Li-1s [38] indicating Li as a substitute at a copper site.…”

Section: Resultsmentioning

confidence: 77%

Lithium‐Doped CuO Nanosheets: Structural Transformation, Optical, and Electrical Characteristics with Enhanced Photocatalytic and Solar Cell Performance

Siddiqui

Qureshi

Haque

2020

Energy & Environ Materials

View full text Add to dashboard Cite

Energy and environmental stuff are two of the main worries for humanity, and nanoscience plays a key role in providing the solution. Huge nano‐research activities have attracted lot of attention in the current scenario. However, designing the material with enhanced optoelectronic properties remains the foremost challenge. In the present work, the Li doped CuO nanosheets are synthesized by the chemical route and examined in photovoltaics and environmental remediation applications. The crystallographic and optical study reveals that crystallite size and bandgap decrease with an increase in lithium‐doping concentration up to 5 mole % and beyond that a reverse trend is observed. Additionally, impedance study has shown the significant contribution of lithium‐ions to the total capacitance and resistivity. Further, the photoactivity of Cu1−xLixO nanosheets (optimum concentration of Cu1−xLixO NSs (x = 0.05)) is projected to the degradation of methylene blue (MB) and used to fabricate bulk heterojunction solar cell together with P3HT and PCBM blend, respectively. The ITO/PEDOT:PSS/P3HT:PC70BM:Cu1−xLixO (x = 0.05)/LiF/Al solar cell realized higher power‐conversion efficiency η ˜ 3.91 than their corresponding pristine device η ˜ 2.98 with enhanced photocurrent density from 9.026 to 11.56 mA cm−2. The proliferation in photocatalysts and solar cells efficiency of Cu1−xLixO (x = 0.05) is mainly attributed to the higher light absorption and lesser electron‐hole recombination. The approach for the synthesis of Cu1−xLixO NSs as potential donor material and device prototypes fabricated is completely safe and cost‐effective.

show abstract

Section: Resultsmentioning

confidence: 77%

Lithium‐Doped CuO Nanosheets: Structural Transformation, Optical, and Electrical Characteristics with Enhanced Photocatalytic and Solar Cell Performance

Siddiqui

Qureshi

Haque

2020

Energy & Environ Materials

View full text Add to dashboard Cite

show abstract

“…In most of the studies in the literature (Mahmood et al 2017;Oh et al 2018) CuO films generated cathodic photocurrent under irradiation indicating its p-type conductivity. However, in this study, the I-V curves of CuO films unexpectedly generated anodic photocurrent.…”

Section: Accepted Manuscript 21mentioning

confidence: 99%

H2O2-assisted photoelectrocatalytic degradation of Mitoxantrone using CuO nanostructured films: Identification of by-products and toxicity

Rosa

Cavalcante

Silva

et al. 2019

Science of The Total Environment

View full text Add to dashboard Cite

CuO nanostructured thin films supported on silicon with 6.5 cm 2 area (geometric area greater than the studies reported in the literature) were synthesized by a chemical bath deposition technique. The electrodes were characterized by MEV, XRD, XPS, contact angle, cyclic voltammetry and electrochemical impedance spectroscopy analyses. To evaluate the photoelectrochemical properties of the CuO films, photocurrent-voltage measurements were performed using linear voltammetry. The catalytic activities of CuO nanostructures were evaluated by monitoring photodegradation of Mitoxantrone (MTX) under UV-A light irradiation. The method of photoelectrocatalysis (PEC), applying a voltage of 1.5 V and assisted by adding H 2 O 2 , was undertaken. To the best of our knowledge, no studies on the degradation of anticancer agents using PEC process have been found in the literature. For comparison purposes, experiments were performed under the same conditions by assisted photocatalysis (PC) with H 2 O 2 and direct photolysis. CuO deposits consists of a needle-like morphology. The presence of CuO in the tenorite phase was evidenced by XRD and the XPS spectra showed the presence of copper(II) oxide. The increase in current under illumination shows that CuO exhibits photoactivity. The PEC system showed a 75% level of MTX degradation, while the level achieved using PC was 50%. Under UV-A light alone only 3% removal was obtained after 180 min. Up to 10 by-products were identified by chromatography-mass spectrometry (LC-MS) with m/z values ranging between 521 and 285 and a plausible degradation route has been proposed. It is worth mentioning that 9 by-products identified in this work, were not found in the literature in other studies of degradation or products generated as metabolites. The toxicity tests of MTX before and after PEC treatment with

show abstract

“…Yiming et al modified the surface of CuWO 4 with 1.8 wt % of CuO, which increased the catalytic activity approximately by 9 times under UV light and by 5 times under visible light compared to CuWO 4 for phenol degradation in aerated aqueous suspension . Hyukhyun Ryu et al improved the photostability of a CuO photoelectrode by Ni-doped seed layer . Ogale et al reported a CuO/CuBi 2 O 4 composite catalyst exhibited supior performance for photoelectrochemical water splitting .…”

Section: Introductionmentioning

confidence: 99%

“…The good catalytic ability of copper oxide in the oxidative degradation of various organic pollutants 35,36 the photostability of a CuO photoelectrode by Ni-doped seed layer. 38 Ogale et al reported a CuO/CuBi 2 O 4 composite catalyst exhibited supior performance for photoelectrochemical water splitting. 39 Wang et al demonstrated for the first time the application of CuO/TiO 2 hybrid with graphene for use in photocatalytic H 2 production and the synergetic catalysis of CuO and graphene additives on TiO 2 was achieved.…”

Section: Introductionmentioning

confidence: 99%

High-Efficiency Bimetallic Catalyst Prepared in Situ from Prussian Blue Analogues for Catalytic Water Oxidation

Guo

Chen

et al. 2019

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The synergistic catalysis of bimetallic catalysts is one of the important ways to improve the catalytic performance; therefore, the development of efficient bimetallic water oxidation catalysts (WOCs) has received extensive attention. This work proposed a bimetallic Fe 3 O 4 /CuO catalyst prepared in situ from the Cu−Fe Prussian blue analogues precursor, promoting Fe 3 O 4modified CuO as a highly efficient and stable bimetallic WOC. The Fe 3 O 4 /CuO exhibits superior and robust catalytic activity for the oxidation of water. Compared with the reported results, it has a higher O 2 evolution rate of about 4406 μmol•h −1 •g −1 and a maximum value for the yield of O 2 as 83.2%, mainly because of the synergetic effect between Fe 3 O 4 and CuO in the complicated water oxidation reaction (WOR) process. We hope this work will be useful for other researchers to design new transition metal bimetallic catalysts for WOR.

show abstract

Improved photostability of a CuO photoelectrode with Ni-doped seed layer

Cited by 36 publications

References 41 publications

Lithium‐Doped CuO Nanosheets: Structural Transformation, Optical, and Electrical Characteristics with Enhanced Photocatalytic and Solar Cell Performance

Lithium‐Doped CuO Nanosheets: Structural Transformation, Optical, and Electrical Characteristics with Enhanced Photocatalytic and Solar Cell Performance

H2O2-assisted photoelectrocatalytic degradation of Mitoxantrone using CuO nanostructured films: Identification of by-products and toxicity

High-Efficiency Bimetallic Catalyst Prepared in Situ from Prussian Blue Analogues for Catalytic Water Oxidation

Contact Info

Product

Resources

About