Oxygen vacancy mediated surface charge redistribution of Cu-substituted LaFeO3 for degradation of bisphenol A by efficient decomposition of H2O2

2020 ◽  
Vol 389 ◽  
pp. 122072 ◽  
Author(s):  
Keliang Pan ◽  
Changzhu Yang ◽  
Jingping Hu ◽  
Wenlong Yang ◽  
Bingchuan Liu ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Bisphenol A ◽  
Surface Charge ◽  
Charge Redistribution ◽  
Decomposition Of H2o2

Effect of Polyphosphate on Removal of Endocrine-Disrupting Chemicals of Nonylphenol and Bisphenol-A by Activated Carbons

2005 ◽  
Vol 40 (4) ◽  
pp. 484-490 ◽  
Author(s):  
Keun J. Choi ◽  
Sang G. Kim ◽  
Chang W. Kim ◽  
Seung H. Kim
Keyword(s):  
Activated Carbon ◽  
Bisphenol A ◽  
Surface Charge ◽  
Activated Carbons ◽  
Endocrine Disrupting Chemicals ◽  
Dipole Interaction ◽  
High Affinity ◽  
Calcium Polyphosphate ◽  
Endocrine Disrupting ◽  
Positively Charged

Abstract This study examined the effect of polyphosphate on removal of endocrine-disrupting chemicals (EDCs) such as nonylphenol and bisphenol-A by activated carbons. It was found that polyphosphate aided in the removal of nonylphenol and bisphenol- A. Polyphosphate reacted with nonylphenol, likely through dipole-dipole interaction, which then improved the nonylphenol removal. Calcium interfered with this reaction by causing competition. It was found that polyphosphate could accumulate on carbon while treating a river. The accumulated polyphosphate then aided nonylphenol removal. The extent of accumulation was dependent on the type of carbon. The accumulation occurred more extensively with the wood-based used carbon than with the coal-based used carbon due to the surface charge of the carbon. The negatively charged wood-based carbon attracted the positively charged calcium-polyphosphate complex more strongly than the uncharged coal-based carbon. The polyphosphate-coated activated carbon was also effective in nonylphenol removal. The effect was different depending on the type of carbon. Polyphosphate readily attached onto the wood-based carbon due to its high affinity for polyphosphate. The attached polyphosphate then improved the nonylphenol removal. However, the coating failed to attach polyphosphate onto the coal-based carbon. The nonylphenol removal performance of the coal-based carbon remained unchanged after the polyphosphate coating.

Optically Governed Dynamic Surface Charge Redistribution of Hybrid Plasmo‐Pyroelectric Nanosystems

Small ◽  
2019 ◽  
Vol 15 (36) ◽  
pp. 1903042 ◽  
Author(s):  
Chi Hao Liow ◽  
Xin Lu ◽  
Kaiyang Zeng ◽  
Shuzhou Li ◽  
Ghim Wei Ho
Keyword(s):  
Surface Charge ◽  
Charge Redistribution ◽  
Dynamic Surface

Oxygen vacancy rich Bi2O4-Bi4O7-BiO2-x composites for UV–vis-NIR activated high efficient photocatalytic degradation of bisphenol A

2020 ◽  
Vol 382 ◽  
pp. 121121 ◽  
Author(s):  
Yuefa Jia ◽  
Shiping Li ◽  
Haoxuan Ma ◽  
Jianzhi Gao ◽  
Gangqiang Zhu ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Bisphenol A ◽  
Photocatalytic Degradation ◽  
High Efficient

Chain Length Effect on Surface Stress of Alkanethiolates Adsorbed onto AU(111) Surface: a van der Waals Density Functional Study

2013 ◽  
Vol 30 (3) ◽  
pp. 241-246 ◽  
Author(s):  
Y.-C. Shih ◽  
C.-S. Chen ◽  
K.-C. Wu
Keyword(s):  
Surface Charge ◽  
Chain Length ◽  
Surface Stress ◽  
Density Functional ◽  
Van Der Waals ◽  
Functional Study ◽  
Charge Redistribution ◽  
Molecular Configuration ◽  
Order Of Magnitude ◽  
Tensile Surface

ABSTRACTFirst-principles calculations were employed to investigate the adsorption-induced surface stress of self-assembled alkanethiolate monolayers on a Au(111) surface as a function of the alkyl chain length. A recently developed fully nonlocal van der Waals density functional was used to accurately account for the chain-chain interactions. We found that surface charge redistribution produces compressive surface stress, while chain-chain interactions produce tensile surface stress. The stress induced by surface charge redistribution is about one order of magnitude greater than that of chain-chain interactions. We observed that the chain-chain interactions play an important role in determining the molecular configuration during adsorptions, and also contribute significantly to the induced anisotropic tensile (positive) surface stress. As the chain length increases the tensile stress increases at a rate of ∼ 0.32 (∼ 0.18) N/m for the direction perpendicular (parallel) to the chain tilt direction.

Oxygen vacancy induced donor-acceptor conjugated microporous poly(triphenylamine-benzothiadiazole)/TiO2 as a Z-scheme heterojunction photocatalyst towards visible-light-driven degradation of Bisphenol A

2021 ◽  
Author(s):  
Chenrui Liu ◽  
Lulu Liu ◽  
Yun Liu ◽  
Zhi Dang ◽  
Chengcheng Li
Keyword(s):  
Oxygen Vacancy ◽  
Bisphenol A ◽  
Visible Light ◽  
Microporous Polymers ◽  
Visible Light Driven ◽  
Donor Acceptor ◽  
Conjugated Microporous Polymers

Herein, a kind of donor-acceptor conjugated microporous polymers (D-A CMPs), poly(triphenylamine-benzothiadiazole) denoted as TPABT, was introduced to synthesize a novel organic-inorganic heterojunction photocatalyst with TiO2 by in-situ polycondensation. The resultant...

scholarly journals Ab-Initio Calculations of Oxygen Vacancy in Ga2O3 Crystals

2021 ◽  
Vol 58 (2) ◽  
pp. 3-10
Author(s):  
A. Usseinov ◽  
Zh. Koishybayeva ◽  
A. Platonenko ◽  
A. Akilbekov ◽  
J. Purans ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Gallium Oxide ◽  
Formation Energy ◽  
Oxygen Vacancies ◽  
Wide Band ◽  
Electronic Charge ◽  
Charge Redistribution ◽  
Wide Band Gap ◽  
Exchange Correlation ◽  
Deep Donor

Abstract Gallium oxide β-Ga2O3 is an important wide-band gap semiconductor. In this study, we have calculated the formation energy and transition levels of oxygen vacancies in β-Ga2O3 crystal using the B3LYP hybrid exchange-correlation functional within the LCAO-DFT approach. The obtained electronic charge redistribution in perfect Ga2O3 shows notable covalency of the Ga-O bonds. The formation of the neutral oxygen vacancy in β-Ga2O3 leads to the presence of deep donor defects with quite low concentration. This is a clear reason why oxygen vacancies can be hardly responsible for n-type conductivity in β-Ga2O3.

scholarly journals Constructing molecular structures on periodic superstructure of graphene/Ru(0001)

2014 ◽  
Vol 372 (2013) ◽  
pp. 20130015 ◽  
Author(s):  
Geng Li ◽  
Li Huang ◽  
Wenyan Xu ◽  
Yande Que ◽  
Yi Zhang ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Surface Charge ◽  
Large Scale ◽  
Lattice Mismatch ◽  
Molecular Structures ◽  
Iron Phthalocyanine ◽  
Charge Redistribution ◽  
High Quality ◽  
Practical Applications ◽  
Substrate Interaction

We review the way to fabricate large-scale, high-quality and single crystalline graphene epitaxially grown on Ru(0001) substrate. A moiré pattern of the graphene/Ru(0001) is formed due to the lattice mismatch between graphene and Ru(0001). This superstructure gives rise to surface charge redistribution and could behave as an ordered quantum dot array, which results in a perfect template to guide the assembly of organic molecular structures. Molecules, for example iron phthalocyanine and C 60 , on this template show how the molecule–substrate interaction makes different superstructures. These results show the possibility of constructing ordered molecular structures on graphene/Ru(0001), which is helpful for practical applications in the future.

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