Synergistic effects of oxygen vacancies and the chelation of tetracycline with metallic ions for enhanced degradation of tetracycline over photocatalysts La2-xKxNiMnO6

CrystEngComm ◽  
2021 ◽  
Author(s):  
Xiaoyan Yu ◽  
Ke Lu ◽  
Le Chen
Keyword(s):  
Oxygen Vacancies ◽  
Synergistic Effects ◽  
Metallic Ions ◽  
Photogenerated Electrons ◽  
Enhanced Degradation

Oxygen vacancies (OVs) can trap photogenerated electrons (e－) to promot the separation of photogenerated e－ and holes ( h＋), and can serve as the reactive sites in a variety of...

Morphology-dependent oxygen vacancies and synergistic effects of Ni/CeO2 catalysts for N2O decomposition

2018 ◽  
Vol 8 (1) ◽  
pp. 276-288 ◽  
Author(s):  
Pei Zhao ◽  
Feng Qin ◽  
Zhen Huang ◽  
Chao Sun ◽  
Wei Shen ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Synergistic Effects ◽  
N2o Decomposition ◽  
Vital Effects

Strong morphology-dependent oxygen vacancies and synergistic effects of Ni/CeO2 catalysts and their vital effects on N2O decomposition.

Enhanced catalytic phenol hydroxylation by CuZnFeAl layered double hydroxides: synergistic effects of Cu+ and oxygen vacancies

2021 ◽  
Vol 45 (1) ◽  
pp. 179-188
Author(s):  
Yong Jiang ◽  
Wenlong Xu ◽  
Jinhua Liang ◽  
Jiecan Shen ◽  
Xiaomin Fu ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Oxygen Vacancies ◽  
Synergistic Effects ◽  
Phenol Oxidation ◽  
Precipitation Method ◽  
Phenol Hydroxylation ◽  
Co Precipitation ◽  
Double Hydroxides

In this work, a series of CuZnFeAl-LDH catalysts for phenol oxidation to dihydroxybenzene have been prepared through a co-precipitation method.

New insight into binary TiO2@C nanocomposites: the crucial effect of an interfacial microstructure

2017 ◽  
Vol 19 (14) ◽  
pp. 9519-9527 ◽  
Author(s):  
Jiandong Zhuang ◽  
Qinfen Tian ◽  
Qian Liu ◽  
Ping Liu ◽  
Xiurong Cui ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Synergistic Effects ◽  
Interfacial Microstructure ◽  
Crucial Effect ◽  
Visible Photocatalysis ◽  
Insight Into

The properties of interfacial bonds and oxygen vacancies as well as their synergistic effects on visible photocatalysis of TiO2@C nanocomposites.

scholarly journals Improved adsorption and degradation performance by S-doping of (001)-TiO2

2019 ◽  
Vol 10 ◽  
pp. 2116-2127 ◽  
Author(s):  
Xiao-Yu Sun ◽  
Xiao Sun ◽  
Xian Zhang ◽  
Ni-Xian Qian ◽  
Min Wang ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Photocatalytic Performance ◽  
Lattice Distortion ◽  
Synergistic Effects ◽  
Chemical Vapor ◽  
Surface Chemical ◽  
Ionic Radii ◽  
Thermal Chemical Vapor Deposition ◽  
Molar Ratios ◽  
Chemical States

In this work, sulfur-doped (S-doped) TiO2 with the (001) face exposed was synthesized by thermal chemical vapor deposition at 180 or 250 °C using S/Ti molar ratios R S/Ti of 0, 0.5, 1, 2, 3, 4 and 5. The S-doped samples synthesized at 250 °C exhibit a significantly improved photocatalytic performance. More precisely, S-doping has the following effects on the material: (1) S can adopt different chemical states in the samples. Specifically, it exists in the form of S2− replacing O2− at a ratio of R S/Ti = 1 and also in the form of S6+ replacing Ti4+ at R S/Ti ≥ 2. As a result, S-doping causes a lattice distortion, because the ionic radii of S2− and S6+ differ from that of the O2− and Ti4+ ions. (2) S-doping increases the adsorption coefficient A e for methylene blue (MB) from 0.9% to 68.5% due to the synergistic effects of the oxygen vacancies, increased number of surface chemical adsorption centers as a result of SO4 2− adsorption on the TiO2 surface and the larger pore size. (3) S-doping increases the MB degradation rate from 6.9 × 10−2 min−1 to 18.2 × 10−2 min−1 due to an increase in the amount of •OH and •O2− radicals.

Synergistic effects between polyvinylpyrrolidone and oxygen vacancies on improving the oxidase-mimetic activity of flower-like CeO2 nanozymes

Nanoscale ◽  
2020 ◽  
Vol 12 (37) ◽  
pp. 19104-19111 ◽  
Author(s):  
Mingyun Zhu ◽  
Yifeng Wen ◽  
Shugui Song ◽  
Anqi Zheng ◽  
Jingcang Li ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Synergistic Effects ◽  
Reaction Products

The synergy between polyvinylpyrrolidone and enriched oxygen vacancies can promote the adsorption of reactants (TMB and O2) and desorption of reaction products, which results in the enhanced oxidase-mimetic activity of CeO2 nanoflowers.

Constructing and enhanced degradation rate of N-AZO/TiO2 core/shell nanocomposite by idiopathic molecular cladding process

2015 ◽  
Vol 08 (06) ◽  
pp. 1550072 ◽  
Author(s):  
Ya-Juan Deng ◽  
Jian-Dong Wang ◽  
Jin-Ku Liu ◽  
Qin Tong ◽  
Jiang-Jie Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Rhodamine B ◽  
Composite Structure ◽  
Degradation Rate ◽  
Core Shell ◽  
Photocatalytic Efficiency ◽  
Photocatalytic Effect ◽  
Photogenerated Electrons ◽  
Core Shell Structure ◽  
Enhanced Degradation

The N - AZO / TiO 2 heterogeneous nanocomposite with core/shell structure revealed a better photocatalytic activity than the single N - AZO nanocrystals (NCs) even though it has a good photocatalytic effect. The recombination degree of photo-induced electrons and holes reduced significantly after molecular TiO 2 layer composited on the surface of N - AZO NCs. From the experiment of degrading rhodamine B solution (2 × 10-5 g/L) under solar light, the optimum photocatalytic efficiency was the N - AZO / TiO 2 composite prepared by idiopathic molecule-cladding (IMC) process and the best proportion of Zn / Ti was 2:1 in our research, which improved by 67% than pure N - AZO . Moreover, the N - AZO / TiO 2 composite prepared by IMC process achieved a molecular combination level between the two components, which not only can improve the immobility of composite structure, but also can make the photogenerated electrons and holes transport easier.

Heterostructured g-C3N4/Ag–TiO2 composites with efficient photocatalytic performance under visible-light irradiation

RSC Advances ◽  
2015 ◽  
Vol 5 (69) ◽  
pp. 56136-56144 ◽  
Author(s):  
Mengqiao Zang ◽  
Lei Shi ◽  
Lin Liang ◽  
Defeng Li ◽  
Jianmin Sun
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Synergistic Effects ◽  
High Photocatalytic Activity ◽  
Light Irradiation ◽  
Enhanced Absorption ◽  
Efficient Separation ◽  
Photogenerated Electrons

The heterostructured g-C3N4/Ag–TiO2 composites exhibited high photocatalytic activity, which was attributed to the synergistic effects of the enhanced absorption of visible light and the efficient separation rates for photogenerated electrons-holes.

Graphene oxide mediated co-generation of C-doping and oxygen defects in Bi2WO6 nanosheets: a combined DRIFTS and DFT investigation

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20562-20570 ◽  
Author(s):  
Minglu Sun ◽  
Xing'an Dong ◽  
Ben Lei ◽  
Jieyuan Li ◽  
Peng Chen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Hydrothermal Method ◽  
Oxygen Vacancies ◽  
Photocatalytic Performance ◽  
Synergistic Effects ◽  
No Removal ◽  
Oxygen Defects ◽  
C Doping

The co-generation of C-doping and oxygen vacancies (OVs) in Bi2WO6 nanosheets was achieved by a graphene oxide-mediated hydrothermal method. The photocatalytic performance was highly promoted in NO removal with the synergistic effects of C-doping and OVs.

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